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Articoli di riviste sul tema "Coal and gas outburst"

Autore: Grafiati

Pubblicato: 7 giugno 2025

Ultima modifica: 2 agosto 2025

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1

Tu, Qingyi, Yuanping Cheng, Sheng Xue, Ting Ren, and Xiang Cheng. "Analysis of the Coal and Gas Outburst Mechanism from the Perspective of Tectonic Movement." Geofluids 2021 (July 1, 2021): 1–18. http://dx.doi.org/10.1155/2021/9988420.

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Abstract (sommario):

Coal and gas outburst is the extreme instability caused by stress, gas, and coal. In this review article, dominant factors and inducing factors of outburst were summarized; geologic features of typical outburst cases and the effects of tectonic movement on outbursts were analyzed; the outburst stages with considerations to geologic factors were divided. It was found that inducing factors, including buried depth, tectonic movement, gas composition, coal seam conditions, overlying/underlying rock conditions, and mining mode, control the outburst by influencing the dominant factors (stress, gas,

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2

An, F. H., and Y. P. Cheng. "An explanation of large-scale coal and gas outbursts in underground coal mines: the effect of low-permeability zones on abnormally abundant gas." Natural Hazards and Earth System Sciences Discussions 1, no. 5 (2013): 4751–75. http://dx.doi.org/10.5194/nhessd-1-4751-2013.

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Abstract. Large-scale coal and gas outbursts post a risk of fatal disasters in underground mines. Large-scale outbursts (outburst of coal and rock greater than 500 t) in recent years in China indicate that there is abundant gas in areas of outbursts containing large amounts of potential energy. The adequate sealing properties of the roof and floor of a coal seam are required for local abundant gas around the site of an outburst, but an annular low-permeability zone in a coal seam, which prevents the loss by gas migration through the coal seam itself, is also required. The distribution of coal

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3

Zou, Yunlong. "Construction and application of comprehensive early warning system for coal and gas outburst in Xinjing Coal Mine." E3S Web of Conferences 329 (2021): 01016. http://dx.doi.org/10.1051/e3sconf/202132901016.

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In order to further strengthen the prevention and control of coal and gas outburst in Xinjing Coal Mine, the online comprehensive analysis and early warning index system and rules of coal and gas outburst suitable for Xinjing Coal Mine were studied. Based on the corresponding early warning computer system and guarantee mechanism, a comprehensive early warning system for coal and gas outbursts in Xinjing Coal Mine was established, realizing real-time intelligent early warning of outburst dangers in working faces. The system realizes the standardization and dynamic management of outburst prevent

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4

An, Fenghua, and Yuanping Cheng. "The Effect of a Tectonic Stress Field on Coal and Gas Outbursts." Scientific World Journal 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/813063.

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Coal and gas outbursts have always been a serious threat to the safe and efficient mining of coal resources. Ground stress (especially the tectonic stress) has a notable effect on the occurrence and distribution of outbursts in the field practice. A numerical model considering the effect of coal gas was established to analyze the outburst danger from the perspective of stress conditions. To evaluate the outburst tendency, the potential energy of yielded coal mass accumulated during an outburst initiation was studied. The results showed that the gas pressure and the strength reduction from the

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5

An, F. H., and Y. P. Cheng. "An explanation of large-scale coal and gas outbursts in underground coal mines: the effect of low-permeability zones on abnormally abundant gas." Natural Hazards and Earth System Sciences 14, no. 8 (2014): 2125–32. http://dx.doi.org/10.5194/nhess-14-2125-2014.

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Abstract (sommario):

Abstract. Large-scale coal and gas outbursts pose a risk of fatal disasters in underground mines. Large-scale outbursts (outburst of coal and rock greater than 500 t) in recent years in China indicate that there is abundant gas in areas of outbursts containing large amounts of potential energy. The adequate sealing properties of the roof and floor of a coal seam are required for local abundant gas around the site of an outburst, but an annular low-permeability zone in a coal seam, which prevents the loss by gas migration through the coal seam itself, is also required. The distribution of coal

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6

Zhang, Shutong. "Geometric Model for Physical Simulation System of Coal and Gas Outburst." Shock and Vibration 2020 (November 3, 2020): 1–10. http://dx.doi.org/10.1155/2020/8815774.

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The physical simulation system is an important means to study the mechanism of coal and gas outburst. The small- and medium-sized coal and gas outbursts account for the largest proportion in China. So, the paper focuses on small- and medium-sized coal and gas outbursts based on key physical rules and their statistical characteristics. According to the geometric parameters statistical data of more than 100 caverns, the proportion of outburst caverns whose depth is less than 5 m is 80%, and whose depth is more than 6 m is 13%. The ratio of depth and cavern outlet’s diameter is 2.58–7.31. There a

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7

Wang, Hanpeng, Bing Zhang, Liang Yuan, Guofeng Yu, and Wei Wang. "Gas Release Characteristics in Coal under Different Stresses and Their Impact on Outbursts." Energies 11, no. 10 (2018): 2661. http://dx.doi.org/10.3390/en11102661.

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The impact mechanism of in situ stress on outbursts plays a key role in the prevention of outbursts during deep coal mining. The in situ stress may influence the outburst by affecting the gas release intensity according to theoretical analysis, but none of the existing studies have taken into consideration this perspective. To explore whether the influence of in situ stress on gas release in coal is an important reason for stress-induced outbursts, experiments on gas release in coal under different axial stresses and on exposure-induced outbursts with different gases were conducted to respecti

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8

Zhang, Chaolin, Enyuan Wang, Jiang Xu, and Shoujian Peng. "Research on Temperature Variation during Coal and Gas Outbursts: Implications for Outburst Prediction in Coal Mines." Sensors 20, no. 19 (2020): 5526. http://dx.doi.org/10.3390/s20195526.

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Coal and gas outbursts are among the most severe disasters threatening the safety of coal mines around the world. They are dynamic phenomena characterized by large quantities of coal and gas ejected from working faces within a short time. Numerous researchers have conducted studies on outburst prediction, and a variety of indices have been developed to this end. However, these indices are usually empirical or based on local experience, and the accurate prediction of outbursts is not feasible due to the complicated mechanisms of outbursts. This study conducts outburst experiments using large-sc

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9

Zhang, Chaolin, Wei Zeng, Jiang Xu, et al. "Acoustic-Gas Coupling Response Law in the Whole Process of Coal and Gas Outburst." Sustainability 15, no. 17 (2023): 12940. http://dx.doi.org/10.3390/su151712940.

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The intensification of the global energy crisis has led to an increasing demand for coal. China is a major coal-producing country in the world and also the country with the most severe coal and gas outburst disasters. Thus, the coal and gas outburst experiment was conducted, and the following results were obtained: the whole outburst process was divided into three stages, namely the outburst preparation stage, the outburst gestation stage, and the outburst development stage. The gas pressure and acoustic emission signals show significant changes in all three stages, while the variation pattern

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10

Minieiev, Serhii. "On methods of categorizing the outburst-hazardous of coal seams." Geo-Technical Mechanics, no. 157 (2021): 62–79. http://dx.doi.org/10.15407/geotm2021.157.062.

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Abstract. Having analyzed the existing methods for categorizing the outburst hazard of coal seams the author worked out the proposals on improving the methodology for categorizing the outburst hazard of coal seams during their mining. The research methodology includes analysis of existing methods for categorizing of prone-to-outburst coal seams depending on the depth and speed of mining operations driving. It is established that the regulatory document on categorization of the prone-to-outburst coal seams needs to be updated in order to take into account possible manifestation of not only sudd

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11

Yang, Fan, Lan, et al. "Dynamic Mechanical and Microstructural Properties of Outburst-Prone Coal Based on Compressive SHPB Tests." Energies 12, no. 22 (2019): 4236. http://dx.doi.org/10.3390/en12224236.

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Understanding the dynamic mechanical behaviors and microstructural properties of outburst-prone coal is significant for preventing coal and gas outbursts during underground mining. In this paper, the split Hopkinson pressure bar (SHPB) tests were completed to study the strength and micro-structures of outburst-prone coal subjected to compressive impact loading. Two suites of coals—outburst-prone and outburst-resistant—were selected as the experimental specimens. The characteristics of dynamic strength, failure processes, fragment distribution, and microstructure evolution were analyzed based o

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12

Cheng, Qiang, Gun Huang, Zhiqiang Li, Jie Zheng, and Qinming Liang. "Effect of Coal Particle Breakage on Gas Desorption Rate during Coal and Gas Outburst." Applied Sciences 14, no. 1 (2024): 469. http://dx.doi.org/10.3390/app14010469.

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The gas contained in coal plays a crucial role in triggering coal and gas outbursts. During an outburst, a large quantity of gas originally absorbed by coal is released from pulverized coal. The role this part of the gas plays in the process of coal and gas outbursts has not been clearly elucidated yet. Therefore, investigating the changes in gas desorption rate from coal particles of different sizes could provide some meaningful insights into the outburst process and improve our understanding of the outburst mechanism. First, combining the diffusivity of coal of different particle sizes and t

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13

Gao, Lu, Xiangtao Kang, Meng Tang, Jinguo Hu, Jiachi Ren, and Cunliu Zhou. "Study on Prediction of Outburst Risk of Excavation Face by Initial Gas Emission." Geofluids 2022 (March 30, 2022): 1–9. http://dx.doi.org/10.1155/2022/4866805.

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In order to improve the accuracy of coal and gas outburst risk prediction for an excavation face, an outburst equilibrium equation for the excavation face was established based on the Mohr–Coulomb criterion to predict the coal and gas outburst risk for the excavation face. The numerical model was established using the COMSOL Multiphysics simulation software to explore the relationship between the initial gas emissions from the borehole and the gas pressure. Using a ZTL20/1000-Z mine flameproof prediction device, taking excavation face 9301 in the Anshun Coal Mine in Guizhou Province, China, as

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14

Nie, Bai Sheng, Xiang Chun Li, Wen Bo Liu, et al. "The Numerical Simulation of Gas-Pulverized Coal Two Phase Flow after Coal and Gas Outburst." Advanced Materials Research 524-527 (May 2012): 776–80. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.776.

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The gas-pulverized coal two phase flow law of gas is simulated by the use of the theory of jet after coal and gas outburst. Research results show that as the volume fraction of pulverized coal in outbursts mixture increases, the speed of two phase flow at the exit gradually reduces, jet core length shorter, turbulent longitudinal effect range smaller, jet width narrower. And dynamic head mainly concentrates in the jet core area and its distribution is more uniform in the roadways. The maximum speed of outburst two-phase flow decreases with the adding volume fraction of pulverized coal, that is

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15

Liu, Xiao, Sen Xu, Haixiao Lin, Xiaoming Ni, and Dequan Xuan. "Development and Application of Visualization System of Gas Geological Dynamic Characteristics under Big Data Framework." Mathematical Problems in Engineering 2023 (April 20, 2023): 1–13. http://dx.doi.org/10.1155/2023/2393411.

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In this study, coal and gas outbursts are the “biggest killer” of mine safety production. With the deepening of mining, the mine gas disaster is becoming more and more serious. From the perspective of big data, the establishment of a dynamic visualization system of gas geology integrating gas geology, gas drainage, dynamic outburst prevention, and other information can effectively improving the defects of gas disaster prevention and control in the coal industry, such as insufficient advance, lack of systematic identification methods and backward information collection methods, which is of grea

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16

Wang, Fakai, Yunpei Liang, Zhongguang Sun, Lei Li, and Xuelong Li. "Determination of the sensitivity index and its critical value for outburst risk prediction: A case study in Fuxiang mine, China." Adsorption Science & Technology 38, no. 9-10 (2020): 502–27. http://dx.doi.org/10.1177/0263617420963735.

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Gas occurrence in coal seams shows zonation, and the outburst risk prediction index is significantly affected by coal seam gas. For different coal mine, the sensitivity of prediction index of outburst risk is inconsistent, and the different area of the same coal mine can present different sensitivities to the same index. In this study, we measured the industrial analysis of coals and determined the degree of outburst risk of each coal seam using coal samples with the particle size of 1 ∼ 3 mm. The relationships between the equilibrium gas pressure and gas desorption index of drill cuttings, be

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17

Kiryaeva, Tatyana. "Effect of bifurcation in physicochemical parameters on outburst hazard of coal seams." E3S Web of Conferences 129 (2019): 01003. http://dx.doi.org/10.1051/e3sconf/201912901003.

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The paper considers interaction between gas-kinetic and physicochemical parameters in coal seams, which conditions coal and gas outbursts. The laboratory and field test data on interaction between geomechanical and physicochemical processes in coal seams are presented for various rank of coals from Kuzbass. The areas of higher coal and methane outburst hazard feature bifurcation in porosity, moisture content and methane absorption of coal from different operating mines in the Kuznetsk, Donets and Lvov–Volyn Basins. Bifurcation consists in the alteration of gradients of these values. At the bif

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18

Yang, Li, Xin Fang, Xue Wang, Shanshan Li, and Junqi Zhu. "Risk Prediction of Coal and Gas Outburst in Deep Coal Mines Based on the SAPSO-ELM Algorithm." International Journal of Environmental Research and Public Health 19, no. 19 (2022): 12382. http://dx.doi.org/10.3390/ijerph191912382.

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Effective risk prevention and management in deep coal mines can reduce the occurrences of outburst accidents and casualties. To address the low accuracy and inefficiency of coal–gas outburst prediction in deep coal mines, this study proposes a deep coal–gas outburst risk prediction method based on kernal principal component analysis (KPCA) and an improved extreme learning machine (SAPSO-ELM) algorithm. Firstly, high-dimensional nonlinear raw data were processed by KPCA. Secondly, the extracted sequence of outburst-causing indicator principal components were used as the input variables for the

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19

Norbert, Skoczylas, Anna Pajdak, Katarzyna Kozieł, and Leticia Teixeira Palla Braga. "Methane Emission during Gas and Rock Outburst on the Basis of the Unipore Model." Energies 12, no. 10 (2019): 1999. http://dx.doi.org/10.3390/en12101999.

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The goal of this paper is to analyze the phenomenon of gas emission during a methane and coal outburst based on the unipore Crank diffusion model for spherical grains and plane sheets. Two occurrences in the Upper Silesian Coal Basin were analyzed: an outburst in a Zofiówka coal mine in 2005 and an outburst in a Budryk coal mine in 2012. Those two outbursts differed considerably. The first one was connected with an unidentified tectonic disturbance in the form of a triple, interlocking fault, and the other one is an example of an outburst in an area free from tectonic disturbances. The model a

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20

Lyu, Pengfei, Tan Li, and Xuehua Chen. "A New Method to Predict Shock-Type Coal-Gas Outburst Disaster and Its Application." Geofluids 2023 (January 30, 2023): 1–8. http://dx.doi.org/10.1155/2023/6957653.

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Coal-gas outburst is the one of most serious coal mine dynamic disasters which affects safety mining, with 39 deaths reported during 2019 in China. The mechanism of coal-gas outbursts is complex, and the prediction methods are immature at present. This article was based on previous research results. Firstly, the occurrence mechanism of coal-gas outburst disasters was summarized. It is clear that the occurrence of coal-gas outburst disasters is jointly affected based on the stability of the static structure of coal-rock, the gas parameters, and the release intensity of shock stress. Secondly, t

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21

Zou, Yunlong. "Research and application of coal and gas outburst early warning system based on gas geological features." E3S Web of Conferences 329 (2021): 01086. http://dx.doi.org/10.1051/e3sconf/202132901086.

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The geological structure of coal mines has always been a dangerous object of attention in coal mine outburst prevention work. In order to realize coal mine safety information management and early warning of gas disasters, comprehensive use of gas geological theory, coal mine disaster warning theory, computer information technology and other analysis methods, considering the influence of geological structure, coal seam occurrence parameters, and gas parameters, an early warning indicator system for identifying the risk of coal and gas outbursts reflecting the geological characteristics of gas h

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22

Xu, Zongwei, Junsheng Zhang, Yunxing Cao, Zhenzhi Wang, and Xinsheng Zhang. "Study on Safety Tunneling Technology of Secondary Outburst Elimination by CO2 Gas Fracturing in High-Outburst Coal Seam." Processes 12, no. 9 (2024): 1925. http://dx.doi.org/10.3390/pr12091925.

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The No. 3 coal seam in the Yuxi Coal Mine has a measured maximum gas content of 25.59 m3/t, along with a maximum gas pressure of 2.9 MPa, indicating its high risk to gas and outbursts. To mitigate outburst risks of the coal seam, the 1301 working face has been implemented with gas pre-drainage measures by grid boreholes from underlying roadways. After one year of extraction, it was confirmed that the gas content at all 33 test sites was below 8 m3/t, meeting the outburst prevention standards. However, during subsequent coal tunnel excavation, the gas desorption index K1 value frequently exceed

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23

Li, Jiazhuo, Penghui Guo, Wenhao Xie, et al. "Experimental Study on Adsorption Pore Structure and Gas Migration of Coal Reservoir Using Low-Field Nuclear Magnetic Resonance." Advances in Civil Engineering 2020 (September 15, 2020): 1–9. http://dx.doi.org/10.1155/2020/8839819.

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For the quantitative recognition and characterization of the flow characteristics of polymorphism coalbed gas in tectonic coal, experiments on pore morphology, pore diameter distribution, and methane adsorption law in outburst tectonic coal were carried out by field emission scanning electron microscopy and low-field nuclear magnetic resonance. The results revealed abundant round and dense “pyrolysis pores” in outburst tectonic coals, most of which were adsorption and seepage pores, with micropores accounting for 78.2%. Most pores were independent and formed the network pore space for gas enri

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24

Zheng, Jie, Qinming Liang, Xin Zhang, et al. "On Gas Desorption-Diffusion Regularity of Bituminous Coal with Different Particle Sizes and Its Influence on Outburst-Coal Breaking." Sustainability 15, no. 13 (2023): 9894. http://dx.doi.org/10.3390/su15139894.

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Coal and gas outburst is an urgent and constantly perplexing problem with coal resource extraction, threatening coal mine safe and sustainable production severely. Its mechanism and the participation of gas in coal breaking are still unclear. To explore this problem, in this paper, gas desorption-diffusion regularity of bituminous coal with different particle sizes and its influence on outburst-coal breaking were investigated through mercury intrusion porosimetry (MIP) tests, isothermal adsorption tests, and desorption-diffusion tests for coal particles with different sizes. The results indica

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25

Krukovskyi, Oleksandr, Viktoriia Krukovska, and Wen Zhang. "Outburst cavity formation in the working face driven along the outburst-prone coal seam." E3S Web of Conferences 168 (2020): 00052. http://dx.doi.org/10.1051/e3sconf/202016800052.

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In Donbas coal mines, coal and gas outbursts present a major risk for the mining operation safety. Rapidly released energy can cause serious damage to the mine’s personnel and production equipment. Modern numerical methods allow modeling complex physical processes occurred during the coal and gas outbursts. The mathematical model was developed for the coupled processes of the rock massif deformation and gas filtration in the mine face near the tectonic dislocation. When solving the problem, the finite element method was used. The calculation results of the stresses, inelastic deformation zones

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26

Xue, Haiteng, Xijian Li, Zhu Liu, Fangrui Dai, and Bei Hu. "Law of Countercurrent Energy Dissipation of Fresh Air by Coal and Gas Outburst Shock Waves." Shock and Vibration 2022 (June 13, 2022): 1–11. http://dx.doi.org/10.1155/2022/8567416.

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Accidental coal and gas outbursts lead to major disasters in coal-producing countries and are difficult to mitigate. To elucidate the energy dissipation law for coal and gas outburst shock waves in a complex ventilation network of mines, a coal-and-gas-outburst-energy-propagation simulation and parameter determination test device were developed and used to perform physical simulation experiments under different outburst strength conditions. These experiments were combined with numerical simulations to obtain the propagation law of outburst shock waves in a roadway and analyze different outburs

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Wu, Xin, Yawen Peng, Jiang Xu, Qiao Yan, Wen Nie, and Tingting Zhang. "Experimental study on evolution law for particle breakage during coal and gas outburst." International Journal of Coal Science & Technology 7, no. 1 (2019): 97–106. http://dx.doi.org/10.1007/s40789-019-00284-1.

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AbstractCoal and gas outburst is a dynamic phenomenon in underground mining engineering that is often accompanied by the throwing and breakage of large amounts of coal. To study the crushing effect and its evolution during outbursts, coal samples with different initial particle sizes were evaluated using a coal and gas outburst testing device. Three basic particle sizes, 5–10 mesh, 10–40 mesh, and 40–80 mesh, as well as some mixed particle size coal samples were used in tests. The coal particles were pre-compacted at a pressure of 4 MPa before the tests. The vertical ground stress (4 MPa) and

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28

Dong, Guo Wei. "The Preventing Coal and Gas Outburst Technology of Middle Distance and Low Permeability and Upper Protective Layer." Advanced Materials Research 690-693 (May 2013): 3059–67. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.3059.

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Protective layer mining is the main regional measures for control coal and gas outburst . According to the defects of the preventing coal and gas outburst technology of middle distance and low permeability and upper protective layer in western Shuicheng mining area, the coal seams coal and gas outburst original danger are analyzed and protective layer is choosed initially using gas geological theory,the choice upper protective layer feasibility is analyzed using protection layer theory. the preventing coal and gas outburst technology of middle distance and low permeability and upper protective

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Zhao, Zhi Gen, Jia Chen, and Jia Ping Yan. "Features of Jianshanchong Klippe and its Control to Gas Geology at Qingshan Coal Mine, Jiangxi Province." Applied Mechanics and Materials 164 (April 2012): 501–5. http://dx.doi.org/10.4028/www.scientific.net/amm.164.501.

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The coal and gas outburst is serious at Qingshan Coal Mine of Jiangxi Province, so it is of significance to research the features of Jianshanchong klippe and its control to gas geology. The research reveals that: Jianshanchong klippe is distributed from the east boundary of Qingshan Coal Mine to No. 45 Exploration Line, its transverse profile is like a funnel while its longitudinal profile is like a wedge, northwest side of the klippe is thicker and deeper while southeast side is thinner and more shallow. Because of the cover and insert of Jianshanchong klippe, the structure of coal-bearing st

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30

Lin, Jianyun, Yujun Zuo, Kai Zhang, et al. "Coal and Gas Outburst Affected by Law of Small Fault Instability during Working Face Advance." Geofluids 2020 (October 27, 2020): 1–12. http://dx.doi.org/10.1155/2020/8880091.

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To analyze the effect of small faults in the working face on coal and gas outbursts, the coal and gas outburst accident in the 21431 working face was studied with the 3DEC numerical simulation method, and the main research contents were the change laws of both stresses at the small fault and the overburden strata movement rate in the small fault zone of which the drop height and the strike were designed into different groups. The results show that the risk of small fault slip increases with the advancing working face. In addition, there is a positive correlation between the risk and the small

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31

Nodzenski, Adam. "Non-Isothermal Desorption of Carbon Dioxide from Polish Coals with Different Texture." Energy & Environment 6, no. 3 (1995): 237–46. http://dx.doi.org/10.1177/0958305x9500600305.

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The process of gas evolution from coal depends to a great extent on coal texture, and specially on the structure of its pores. A transport of sorbate from within a grain to its external surface, and therefore the evolution of gas desorbed from coal depends on the structure of pores. Results of the investigations of nonisothermal desorption of carbon dioxide from several Polish coals were given in the article. A comparison of nonisothermal desorption curves obtained under the same conditions for coals with different pore volumes and pore volume distributions showed that the-process of gas evolu

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32

Feng, Guangjun, Xinzhuo Zhao, Meng Wang, et al. "Fractal Pore and Its Impact on Gas Adsorption Capacity of Outburst Coal: Geological Significance to Coalbed Gas Occurrence and Outburst." Adsorption Science & Technology 2022 (November 9, 2022): 1–19. http://dx.doi.org/10.1155/2022/4273900.

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Pore structure and methane adsorption of coal reservoir are closely correlated to the coalbed gas occurrence and outburst. Full-scale pore structure and its fractal heterogeneity of coal samples were quantitatively characterized using low-pressure N2 gas adsorption (LP-N2GA) and high-pressure mercury intrusion porosimetry (HP-MIP). Fractal pore structure and adsorption capacities between outburst and nonoutburst coals were compared, and their geological significance to gas occurrence and outburst was discussed. The results show that pore volume (PV) is mainly contributed by macropores (>100

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33

You, Bo, Bo Li, Shi Liang Shi, He Qing Liu, Yi Lu, and He Li. "The Research of Coal and Gas Outburst Warning Based on Logistic Regression and Geographic Information System." Shock and Vibration 2021 (July 10, 2021): 1–8. http://dx.doi.org/10.1155/2021/5971483.

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Coal and gas outburst is one of the major disasters in the safety production of coal mine. According to the mechanism of coal and gas outburst, based on the comprehensive analysis of various influencing factors of coal and gas outburst, with the principles of selected early warning indicator, the basic information database of coal and gas outburst warning is constructed, and the information data query function is realized. The mathematical model of coal and gas outburst warning is established by the logistic regression analysis based on the gas concentration, the gas desorption index of drill

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34

Hao, Qingbo. "Research Status and Review of Coal and Gas Outburst Mechanism." Journal of Scientific and Engineering Research 12, no. 03 (2025): 21–25. https://doi.org/10.5281/zenodo.15223097.

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Abstract (sommario):

The continuous occurrence of coal and gas outburst accidents seriously affects the safe production of coal mines. This paper reviews the existing research results of coal and gas outburst mechanism at home and abroad. The historical development process and research status of coal and gas outburst mechanism are expounded. The shortcomings of these research results are analyzed. Based on the full text, the mechanism of coal and gas outburst has developed from single factor to multi-factor, and the comprehensive action hypothesis has been widely recognized. In addition, the preparation mechanism

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35

Dai, Linchao, Yanbao Liu, Jie Cao, et al. "A Study on the Energy Condition and Quantitative Analysis of the Occurrence of a Coal and Gas Outburst." Shock and Vibration 2019 (July 28, 2019): 1–13. http://dx.doi.org/10.1155/2019/8651353.

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Abstract (sommario):

With mining depths increasing, coal and gas outburst disasters are becoming more and more serious and complicated, which directly restricts the production efficiency of coal mines. In order to study the rules of energy dissipation during the occurrence of a coal and gas outburst based on the occurrence mechanisms, a simulation experiment of a coal and gas outburst with a ground stress of 16 MPa and a gas pressure of 0.5 MPa was carried out using a self-developed large-scale coal and gas outburst simulation experimental system. A quantitative analysis was given based on the energy model. The re

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36

Khorolskyi, A., and A. Kosenko. "DEVELOPMENT AND IMPLEMENTATION OF A MODEL FOR SUBSTANTIATION OF OPTIMAL TECHNOLOGICAL SCHEMES FOR THE MINING OF OUTBURST-PRONE COAL SEAMS." Naukovyi visnyk Donetskoho natsionalnoho tekhnichnoho universytetu, no. 1-2 (2022): 193–205. http://dx.doi.org/10.31474/2415-7902-2022-1(8)-2(9)-193-205.

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Abstract (sommario):

Purpose. The purpose of the work is to develop a new approach to substantiate the optimal technological schemes for the mining of outburst-prone coal seams, which will ensure the minimum likelihood of sudden outbursts of coal and gas in the breakage face. Methodology. The integrated approach has been applied, involving the use of graphs, network models, optimization algorithms to find optimal technological solutions; application of energy-force models to assess the likelihood of sudden outbursts of coal and gas; application of dynamic programming to substantiate technological parameters (seam

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Wang, Chaojie, Xiaowei Li, Changhang Xu, et al. "Dynamic Characterization during Gas Initial Desorption of Coal Particles and Its Influence on the Initiation of Coal and Gas Outbursts." Processes 9, no. 7 (2021): 1101. http://dx.doi.org/10.3390/pr9071101.

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Abstract (sommario):

The law of gas initial desorption from coals is greatly important for understanding the occurrence mechanism and predicting coal and gas outburst (hereinafter referred to as ‘outburst’). However, dynamic characterization of gas initial desorption remains to be investigated. In this study, by monitoring the gas pressure and temperature of tectonically deformed (TD) coal and primary-undeformed (PU) coal, we established the evolution laws of gas key parameters during the initial desorption. The results indicate that the gas pressure drop rate, mass flow rate, initial desorption rate, and gas velo

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Zhao, Xusheng, Jie Cao, Bo Wang, and Xuelin Yang. "Experiment Study of Outburst Pulverized Coal-Gas Two-Phase Flow and Characteristic Analysis of Outburst Wave." Geofluids 2021 (June 18, 2021): 1–11. http://dx.doi.org/10.1155/2021/8186230.

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Abstract (sommario):

Coal and gas outburst is still a major safety problem in the process of coal production in China. Correctly understanding of the migration law of outburst high gas and pulverized coal is an important basis for accurately predicting the occurrence time and possible scope of outburst. To reveal the airflow disturbance characteristics and coal-gas flow rule in coal and gas outburst process, outburst coal-gas migration simulations under different gas pressures were conducted using a self-developed visual outburst dynamic effect test device. The results showed that coal-gas flow state at the outbur

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Ou, Jianchun, Enyuan Wang, Zhonghui Li, Nan Li, He Liu, and Xinyu Wang. "Study on the Evolutionary Characteristics of Acoustic–Magnetic–Electric Signals in the Entire Process of Coal and Gas Outburst." Sustainability 15, no. 22 (2023): 15944. http://dx.doi.org/10.3390/su152215944.

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Abstract (sommario):

In recent years, with the continuous increase in the depth and intensity of coal mining, coal and gas outburst disasters pose a severe threat to the safe production of coal mines. Thus, this experiment studied the characteristics of electromagnetic radiation, acoustic emission, and electric potential signals during gas adsorption, stress loading, and the entire outburst process. The results indicate that during the adsorption process, different parts of the coal body exhibit variations in electric potential signals, electromagnetic radiation, and acoustic emissions. During the loading process,

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Zhao, Bo, Guangcai Wen, Jun Nian, et al. "Numerical Simulation Study on the Multi-Physical Field Response to Underground Coal and Gas Outburst under High Geo-Stress Conditions." Minerals 12, no. 2 (2022): 151. http://dx.doi.org/10.3390/min12020151.

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Abstract (sommario):

Based on thermal–fluid–solid coupling law in coal and gas outburst, a multi-physical field numerical analysis model is built for the whole outburst process. The response laws of stress, gas pressure, temperature, and seepage in different areas and different time nodes around coal and rock mass in the coal and gas outburst under high stress condition are discussed. Research results show: Firstly, the stress response law of the coal and rock mass around the burst hole is initial vibration–sudden attenuation–late stability. Secondly, the gas pressure response law in different areas is that the ga

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Li, Tao, Banghua Yao, Zhihui Wen, Dengke Wang, and Hongtu Zhang. "Intelligent Identification of Coal Structure for the Control of Heat-Induced Gas Outburst and Energy-Efficient Mining." International Journal of Heat and Technology 38, no. 4 (2020): 839–46. http://dx.doi.org/10.18280/ijht.380409.

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Abstract (sommario):

Coal structure could be roughly divided into four types. Among them, the two kinds of tectonic coal face a high risk of heat-induced gas outburst, which arises from the unfavorable temperature conditions in the coal structure. However, there is not yet an efficient way to identify the type of coal structure. The adjacent types of coal structures are often misjudged. The lack of an efficient identification method hinders the prevention of heat-induced gas outburst, making it difficult to realize energy-efficient and safe mining. To solve the problem, this paper first theoretically analyzes the

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Zhang, Wenqing, Chaomin Mu, Dengke Xu, and Zhongqing Li. "Energy Action Mechanism of Coal and Gas Outburst Induced by Rockburst." Shock and Vibration 2021 (June 12, 2021): 1–14. http://dx.doi.org/10.1155/2021/5553914.

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Abstract (sommario):

The essence of both rockburst and coal and gas outburst lies in fast energy release. In order to explore the energy action mechanism of coal and gas outburst induced by rockburst in rockburst and coal and gas outburst combined mines, the split Hopkinson pressure bar (SHPB) experimental device was firstly used to conduct uniaxial impact failure test of coal specimens prone to outburst under different strain rates, and their energy dissipation laws under impact loading were obtained. Next, under the engineering background of coal and gas dynamic phenomena induced by rockburst with different inte

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Liu, Xianglan, Xusheng Zhao, and Qinghua Zhang. "Study on Early Warning System of Coal and Gas Outburst." Open Electrical & Electronic Engineering Journal 7, no. 1 (2013): 116–22. http://dx.doi.org/10.2174/1874129001307010116.

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Abstract (sommario):

Coal and gas outburst is an extremely complex and serious gas dynamic phenomenon. Therefore, building an early warning system based on computer system, safety monitoring systems of coal mines and local area network is a precondition for effectively preventing coal and gas outburst. The early warning system for coal and gas outburst is a complicated system project and has blended together the coal mine safety theory, the information technology and the early warning technology. Combining the hardware conditions, organization management structures and characteristics of preventing outburst techno

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Lukinov, Viacheslav, Kostiantyn Bezruchko, Mykhailo Matrofailo, and Liubov Kuznetsova. "TO THE QUESTION OF OUTBURST HAZARD PREDICTION OF COAL BEDS AT THE LVIV-VOLYN BASIN." Geology and Geochemistry of Combustible Minerals 3, no. 180 (2019): 41–51. http://dx.doi.org/10.15407/ggcm2019.03.041.

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Abstract (sommario):

Sudden coal and gas outbursts in coal mines are one of the most harmful and at the same time, dangerous gas-dynamic phenomena faced when coal producting. The sudden coal and gas outbursts is the evanescent destruction of the bottom-hole area in the coal bed, which develops from the bottom into the depth of a massif, and the crushed coal with gas is thrown to a long distance from the bottom into the mine, destroying everything in its way, creating the conditions for explosion and fire breaking-out. Sudden outbursts lead to significant material losses for the recovery from an accident and in som

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Bondarenko, Volodymyr, Olena Svietkina, Roman Lysenko, and Baochang Liu. "Methane gas hydrates influence on sudden coal and gas outbursts during underground mining of coal deposits." E3S Web of Conferences 201 (2020): 01002. http://dx.doi.org/10.1051/e3sconf/202020101002.

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Abstract (sommario):

The mechanism of gas hydrates formation in coal seams is studied in the paper, as well as their involvement is hypothesized in the sudden outbursts of coal and gas during underground mining of coal deposits. It has been substantiated and proved that one of the real reasons for subsequent outbursts is the formation of gas hydrates in coal as a type of secondary gas hydrate deposits. It has been also substantiated that, as a result of coal metamorphism, a large amount of gaseous hydrocarbons, mainly methane, is formed in the seam, which under certain thermobaric conditions leads to the gas hydra

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46

Guan, Wenbo. "Study on the Influence of Geological Structure on Gas Occurrence and Gas Outburst." International Journal of Natural Resources and Environmental Studies 2, no. 1 (2024): 148–53. http://dx.doi.org/10.62051/10.62051/ijnres.v2n1.17.

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Abstract (sommario):

Gas is a gaseous geological body and a product of geological genesis. The geological structure and the historical evolution of coal bearing strata control the generation conditions of coal-bed gas and the preservation conditions of coal-bed gas subjected to depression, uplift, compression and tension in previous tectonic movements. The geological conditions that control the occurrence of gas disasters determine the state of gas occurrence, gas content, gas pressure, gas emission and the risk of coal and gas outburst in coal seams. There are obvious characteristics of zoning and zoning. Gas occ

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47

Cherdantsev, S. V., P. A. Shlapakov, E. A. Shlapakov, K. S. Lebedev, and V. V. Kolykhalov. "Flow of a viscous dispersing gas-air mixture due to a sudden release of gas into the mine atmosphere." Mining Industry Journal (Gornay Promishlennost), no. 5/2024 (November 15, 2024): 154–59. http://dx.doi.org/10.30686/1609-9192-2024-5-154-159.

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Abstract (sommario):

Mining of coal deposits leads to forming outburst-prone areas, which are prone to sudden emissions of coal, rock and gas into mine workings. These sudden outbursts can result in severe accidents that are often fatal. As a rule, outbursts occur at high speeds, sometimes exceeding the speed of sound. From the point of view of gas dynamics, a gas outburst is a disturbance that creates a shock wave in the quasi-stationary mine atmosphere, the intensity of which depends on the velocity of the outburst gas. The shock wave is capable of injuring miners, destroying the mine support and ruin mechanisms

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48

Cai, Feng. "Numerical Simulation Research on Coal-Gas Outburst in the Process of Development." Applied Mechanics and Materials 204-208 (October 2012): 3377–83. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.3377.

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Abstract (sommario):

Coal-gas outburst is a kind of complex disaster induced by engineer operations in the process of extracting or developing in coal seams. According to the theories of gas seepage and deformation of coal or rock seams, taking consideration of the heterogeneity property of coal or rock materials in mechanics of materials as well as non-linear permeability characteristic of coal or rock materials in the process of deformation and fracture, SPH algorithm of LS-DYNA software is used to numerically simulate the coal-gas outburst induced by development in coal seams. Simulation results represent the w

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49

Ding, Ke, Lianguo Wang, Wenmiao Wang, et al. "Experimental Study on Gas Seepage Characteristics of Axially Unloaded Coal under Different Confining Pressures and Gas Pressures." Processes 10, no. 6 (2022): 1055. http://dx.doi.org/10.3390/pr10061055.

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Abstract (sommario):

Protective coal seam mining can not only effectively prevent coal and gas outbursts in mines, but also provide stress unloading space for the protected coal seam. The coal body in the protected coal seam might undergo deformation, internal damage and structural damage, which changes its gas seepage characteristics. This study aims to explore the variations of permeability of the coal body in the protected coal seam under axial unloading. With the coal body from the outburst coal seam in the Huaibei mining area as the research object, experiments were conducted to explore the gas seepage charac

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50

Voitenko, Yu I., and А. V. Kovtun. "ABOUT THE PRE-OUTBURST STATE OF THE COAL AND SANDSTONE AND THE POSSIBLE MECHANISM OF COAL AND GAS OUTBURST PROCESS." Мінеральні ресурси України, no. 2 (July 25, 2018): 32–35. http://dx.doi.org/10.31996/mru.2018.2.32-35.

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Abstract (sommario):

The paper aims to examine the suitability of A. S. Balankin brittle fracture criterion in predicting the of large-scale coal and gas outbursts in underground coal mines under compression load. Formation of dissipative structures as cracks and clusters of local microcracking occurs under the influence of the rock pressure. The formation of microdefects in dissipative structures occurs mainly on local anisotropic inclusions. Mechanism of pre-outburst spalling of gas-saturated coal is analyzed. Destruction (primary outburst) occurs when the brittle fracture conditions are met. And also in the cas

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