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Thematische Bibliographien / Low overburden / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „Low overburden“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 29. Juli 2025

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1

Purnama, Muhammad, Slamet Budi Prayitno, Max Rudolf Muskananfola, and Suryanti Suryanti. "ECOLOGICAL INDICES OF MANGROVE GASTROPODS COMMUNITY IN NICKEL MINING IMPACTED AREA OF POMALAA, SOUTHEAST SULAWESI." BIOTROPIA 31, no. 3 (2024): 359–71. https://doi.org/10.11598/btb.2024.31.3.2267.

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Article Highlights- Gastropods (Invertebrates: Mollusca) have the potential to be developed as biological indicators of the health of coastal aquatic environments- The development of gastropod communities has been proven to provide a significant ecological response in assessing environmental quality in the mangrove in relation to overburden waste input from nickel mining activities.- Overburden waste systemically degrades the ground floor (substrate) of the mangrove ecosystem as an area where the entire life cycle of the gastropod community is carried out.AbstractThis research aimed to determi

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Nugroho, Totok, Subari, Bagus D. Erlangga, Supriyadi, David C. Birawidha, and Arifin Siagian. "Examining the properties, behaviour in firing and potential application of coal mine overburden for stoneware ceramics." Mining of Mineral Deposits 17, no. 4 (2023): 109–15. http://dx.doi.org/10.33271/mining17.04.109.

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Purpose. A binary mixture of a ceramic body was studied, incorporating overburden from a coal mine site in Bontang, East Kalimantan, Indonesia. This overburden material has been tested for the manufacture of stone-ceramic body. Methods. The initial characterization of overburden materials includes testing the chemical composition by XRF analysis and mineral content by XRD analysis on raw materials and overburden exposed to high temperature. The composition of ceramic specimens is a mixture of 85% overburden material and 15% fine sand. Firing temperatures in the range of 900-1100°C were applied

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Jarwinda, A. Badhurahman, G. J. Kusuma, and R. S. Gautama. "1-Dimensional numerical modelling of unsaturated water flow and oxygen diffusion in overburden material column using hydrus 1-D." IOP Conference Series: Earth and Environmental Science 882, no. 1 (2021): 012064. http://dx.doi.org/10.1088/1755-1315/882/1/012064.

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Abstract Coal mining activities, especially overburden material dumping can cause a negative impact into the environment, i.e., acid mine drainage, Acid mine drainage is characterized as low pH water with high sulphate and metal content produced from sulphidic-bearing overburden material with oxygen and water. In unsaturated condition, both of gaseous and water phases exist, acid mine drainage is generated. This study aims to characterize and model the water content in unsaturated condition and diffusion of oxygen of overburden material using the Hydrus 1-D software in a laboratory-scaled colu

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Su, Xiaochao, Zhilong Chen, Xudong Zhao, Xiaobin Yang, Qilin Feng, and Haizhou Tang. "Optimization Design of Underground Space Overburden Thickness in a Residential Area Concerning Outdoor Thermal Environment Evaluation." Sustainability 10, no. 9 (2018): 3205. http://dx.doi.org/10.3390/su10093205.

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Reasonable design of the overburden thickness of underground space (OTUS) can influence the outdoor thermal environment by affecting the ground plant communities. To optimize the design of the OTUS for improving the outdoor thermal environment, this study summarized the influence mechanism of the OTUS on the outdoor thermal environment and proposed a framework of the optimization design of underground space overburden thickness. A typical row layout residential area in Nanjing, China, was taken as the research object on which to perform a numerical study of the influence of plant communities f

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Fajar Purnama, Muhammad, Slamet Budi Prayitno, Max Rudolf Muskananfola, and Suryanti Suryanti. "Existing Conditions of Gastropod Communities in Areas Affected by Nickel Mining Overburden in the Mangrove Ecosystem of Dawi-Dawi, Southeast Sulawesi." BIOTROPIA 31, no. 2 (2024): 266–76. http://dx.doi.org/10.11598/btb.2024.31.2.2175.

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ARTICLE HIGLIGHTS- Nickel mining activities significantly impacted the ecological integrity of the Pomalaa coastal area in Southeast Sulawesi, particularly in the mangrove ecosystem.- The exposure of overburden waste in the mangrove ecosystem has led to the loss of important gastropod species and a decline in population of surviving species- The low population of gastropod species in nickel mining impact areas indicates extensive environmental damage caused by these activities.ABSTRACTGastropod resources in the Dawi-Dawi mangrove ecosystem, Southeast Sulawesi are greatly influenced by the inpu

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Valentino, Dedy Saputra, Theresia Amelia Pawitra, and La Ode Safar Tosungku. "Integration of HIRARC and B/C Ratio to Reduce the Number of Accidents in PT. XYZ." IJIEM - Indonesian Journal of Industrial Engineering and Management 5, no. 1 (2024): 165. http://dx.doi.org/10.22441/ijiem.v5i1.22554.

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PT XYZ is one of the companies engaged in the mining industry. The company has total coal reserves of 5.8 million tons and produces a coal calorific value of 4900 Kcal/kg GAR. PT XYZ uses a 30-ton class dump truck for overburdened transportation activities. Overburden transportation is transporting material from one location or facility to another. The operation of dump trucks has risks that need to be controlled to minimize work accidents. Truck operators have considerable risks, including bumping, hitting, slipping, falling, and pinched. This study aims to identify potential accidents that c

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Ji, Yanju, Shangyu Du, Lijun Xie, et al. "TEM measurement in a low resistivity overburden performed by using low temperature SQUID." Journal of Applied Geophysics 135 (December 2016): 243–48. http://dx.doi.org/10.1016/j.jappgeo.2016.09.027.

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8

Pettifer, G. R., N. Djordjevic, D. Heislers, J. Schaeffer, and J. A. Withers. "Geophysical and image processing methods for detection of fireholes in brown coal, Latrobe Valley." Exploration Geophysics 20, no. 2 (1989): 153. http://dx.doi.org/10.1071/eg989153.

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Fireholes at the top of the thick Latrobe Valley brown coal seams pose a geotechnical hazard to overburden dredges and reduce coal reserves. Overburden thickness (typically 10 to 15 m) is up to 50 m in the fireholes, which are from 20 to hundreds of metres in diameter and are infilled with baked clays, soft lacustrine clays and alluvial deposits.Given the complexity of firehole geometry and overburden geology, firehole definition prior to overburden stripping, by drilling alone, is expensive and is not definitive. To improve firehole exploration, geophysical methods were tried in a test area w

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Lo, S. C. R. "Pull-Out Resistance of Polyester Straps at Low Overburden Stress." Geosynthetics International 5, no. 4 (1998): 361–82. http://dx.doi.org/10.1680/gein.5.0126.

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Eka Saputra, Yudha Hadiyanto, Suyanto Suyanto, Fatmawati Fatmawati, and Suhaili Asmawi. "ANALISIS PEMBENTUKAN TANAH DARI BATUAN PENUTUP OVERBURDEN PADA AREA REKLAMASI PT BORNEO INDOBARA GUNA MENDUKUNG KEBERHASILAN REKLAMASI SECARA BERKELANJUTAN." EnviroScienteae 18, no. 3 (2022): 155. http://dx.doi.org/10.20527/es.v18i3.14820.

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This study aims to analyze the process of soil formation on overburden material in the reclamation area in 2013 (9 years), 2015 (7 years), and 2018 (4 years) to support the success of sustainable reclamation, and analyze the relationship between planting age, morphology and climate conditions in the study area that can affect the process of soil formation in the overburden. The research was conducted at a coal mining company located in Tanah Bumbu Regency, South Kalimantan Province. The research method used was descriptive quantitative. Data collection was done by making a test trench and taki

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Li, Zhuxin, Hao Zou, Shengqi Jian, et al. "Study on the Effect of Liquefiable Overburden Foundations of Rockfill Dams Based on a Pore Pressure Model." Water 16, no. 18 (2024): 2649. http://dx.doi.org/10.3390/w16182649.

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China’s southwestern region boasts abundant hydropower resources. However, the area is prone to frequent strong earthquakes. The areas surrounding dam sites typically have deep overburden, and the liquefaction of saturated sand foundations by earthquakes poses significant safety risks to the construction of high dams in the southwest. The effects of liquefaction and reinforcing measures on the foundations of rockfill dams on liquefiable overburden under seismic action are currently the subject of somewhat unsystematic investigations. The paper utilizes the total stress and effective stress met

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Gastrich, Holger, Claus Gößling, Reiner Klingenberg, et al. "The Dortmund Low Background Facility — Low-background gamma ray spectrometry with an artificial overburden." Applied Radiation and Isotopes 112 (June 2016): 165–76. http://dx.doi.org/10.1016/j.apradiso.2016.03.025.

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13

Sánchez, Paul, and Daniel J. Scheeres. "Seismic waves in the asteroid environment." EPJ Web of Conferences 249 (2021): 13001. http://dx.doi.org/10.1051/epjconf/202124913001.

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Through numerical simulations, we investigate impact generated seismic wave transmission in granular media under extremely low pressure. This mimics the conditions in the interior of asteroids and other small planetary bodies. We find a dependency not only on the overburden pressure on the medium, but also on the velocity of the impact that generates the wave. This is, at extremely low values of overburden pressure, the wave speed depends no only on the imposed pressure, but also on the increment in pressure created by the passing of the wave. We study crystalline and random packings and find

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Olaseeni, O., M. Aroyehun, O. Odeleye, J. Tsado, E. Lawan, and A. Ajayi. "PROTECTIVE CAPACITY ASSESSMENT OF A SHALLOW AQUIFERAT THE EASTERN PART OF ADO-EKITI, SOUTHWESTERN NIGERIA." Nigerian Journal of Science and Environment 22, no. 1 (2024): 45–56. http://dx.doi.org/10.61448/njse221244.

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Vertical Electrical Soundings (VES) survey has been undertaken at the eastern part of Ado-Ekiti, southwestern Nigeria to assessthe aquifer protective capacity of the overburden units of the area. The Schlumberger electrode array was adopted with a maximumcurrent electrode spread (AB) of 300 m.Thirty-six(36) VES points wasoccupied and processed through a partial curve matching technique and 1-D forward modelingcomputer-assistedsoftware.The interpretation revealed H, A, KH and HA-type curves and threemajor geoelectric layers overlying the resistive basement. The groundwater potential and overbur

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Festus Oyedele, Kayode, and Olawale Babatunde Olatinsu. "GEOPHYSICAL EVALUATION OF SUBSURFACE PROTECTIVE CAPACITY AND GROUNDWATER PROSPECT IN A TYPICAL SEDIMENTARY ZONE, EASTERN DAHOMEY BASIN USING ELECTRICAL RESISTIVITY TECHNIQUE." MALAYSIAN JOURNAL OF GEOSCIENCES 5, no. 2 (2020): 85–92. http://dx.doi.org/10.26480/mjg.02.2021.85.92.

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Subsurface protective capacity evaluation is important in groundwater prospecting. With the aid of Dar-Zarrouk parameters which show direct relationship with contaminants infiltration time and transmissivity, joint interpretation of vertical electrical sounding (VES) and 2-D resistivity imaging were employed to evaluate overburden protective capacity and groundwater potentials at Mowe in Obafemi-Owode LGA, southwest Nigeria. Total longitudinal conductance S, total transverse resistance T, longitudinal resistivity ρL and transverse resistivity ρT were computed. Sand/clayey sand was delineated a

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Li, J., Z. Li, R. Han, et al. "Investigation of structures in tunnel overburdens by means of muon radiography." Journal of Instrumentation 17, no. 05 (2022): P05029. http://dx.doi.org/10.1088/1748-0221/17/05/p05029.

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Abstract Cosmic ray muon radiography is a new imaging technique that is being used to investigate the density structure of large objects and the shallow crust. For example, it has been used to investigate magma conduits of active volcanoes, cavities above tunnels and hidden chambers inside pyramids, and has proven to be effective and accurate. However, low cosmic muon flux has limited the development of muon radiography in many engineering applications. In this paper, the potential application of muon radiography to investigate density anomalies in tunnel overburden is discussed. Results show

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Negrão, Leonardo Boiadeiro Ayres, Herbert Pöllmann, and Marcondes Lima da Costa. "Production of low-CO2 cements using abundant bauxite overburden “Belterra Clay”." Sustainable Materials and Technologies 29 (September 2021): e00299. http://dx.doi.org/10.1016/j.susmat.2021.e00299.

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18

Kapure, G. U., C. B. Rao, V. D. Tathavadkar, and R. Sen. "Direct reduction of low grade chromite overburden for recovery of metals." Ironmaking & Steelmaking 38, no. 8 (2011): 590–96. http://dx.doi.org/10.1179/1743281211y.0000000028.

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19

Das, Sarat Kumar, Mahasakti Mahamaya, and Krishna R. Reddy. "Coal mine overburden soft shale as a controlled low strength material." International Journal of Mining, Reclamation and Environment 34, no. 10 (2020): 725–47. http://dx.doi.org/10.1080/17480930.2020.1721043.

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20

Shustov, O. O., A. V. Pavlychenko, O. P. Bielov, A. A. Adamchuk, and O. O. Borysovska. "Calculation of the overburden ratio by the method of financial and mathematical averaged costs." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 5 (2020): 30–36. http://dx.doi.org/10.33271/nvngu/2021-5/030.

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Purpose. To calculate the parameters of the development of brown coal deposits, including the limiting overburden ratio, when involving coal clay into the development together with brown coal in the composition of the coal mass. Methodology. To calculate the cost of mining a mineral, the method of financial and mathematical averaged costs was applied, considering the level of projected capital investments and the cost of investment funds. Findings. The influence of the involvement of coal clays in the development together with brown coal as a part of coal mass on the limiting overburden ratio

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Irunkwor, T. C., and N. Abanjo. "Vertical electrical sounding, 2-D resistivity imaging and Dar-zarrouk parameters were used to investigate leachate plume generation, migration and the strength." International Journal of Innovative Science and Research Technology 7, no. 8 (2022): 1052–68. https://doi.org/10.5281/zenodo.7055818.

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Vertical electrical sounding, 2-D resistivity imaging and Dar-zarrouk parameters were used to investigate leachate plume generation, migration and the strength of the overlying protective capacity to prevent contamination of the groundwater aquifer at a municipality in the Western Niger Delta. Twelve vertical electrical sounding was investigated using the Mini-Res Resistivity Meter with the Schlumberger array. Darzarrouk parameters were employed to determine the protective capacity of overburden rock and the vulnerability of the aquifer to surface contaminants. The VES result was interpreted w

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Chen, Xuejun, Ruijian Guo, Lingming Tang, and Xiaochen Zhang. "Study on Ground Collapse of Covered Karst Soil Caves by Sudden Drop of Groundwater." Advances in Civil Engineering 2021 (August 10, 2021): 1–12. http://dx.doi.org/10.1155/2021/7796401.

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In this study, the ellipsoidal soil cave with vertical collapses in the covering karst area is studied. Based on certain assumptions, the mechanical model of karst collapse caused by groundwater drop was established. Then, based on the negative pressure calculation formula of soil cave cavity according to Boyle–Mariotte’s law, the expression of the stability coefficient of the soil cave was proposed. Subsequently, the feasibility of the theoretical formula was verified. The calculation example analyzed the relationship of groundwater parameters and overburden thickness. The results show that w

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Brown, G. M. C., and C. D. Grant. "Nutrient status of pasture ecosystems established on rehabilitated overburden and topsoil sites in the Hunter Valley, New South Wales." Soil Research 38, no. 2 (2000): 479. http://dx.doi.org/10.1071/sr99061.

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The rehabilitation of disturbed areas at the Howick Coal Mine (Hunter Valley, New South Wales) involves re-creating pasture ecosystems. Some sites are rehabilitated using topsoil, whereas others are established directly into the overburden mine waste due to the low availability and poor quality of topsoil. Pastures on both substrate types are then maintained by periodic applications of fertiliser. A comparison was made between nutrient levels held in the soil and the roots and stems of the dominant pasture grass (Rhodes grass, Chloris spp.) in an overburden (rehabilitated in 1990) and a topsoi

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Currenti, Gilda, Barbara Cantucci, Giordano Montegrossi, et al. "CO2 Leakage Scenarios in Shale Overburden." Minerals 13, no. 8 (2023): 1016. http://dx.doi.org/10.3390/min13081016.

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Potential CO2 leakage from deep geologic reservoirs requires evaluation on a site-specific basis to assess risk and arrange mitigation strategies. In this study, a heterogeneous and realistic numerical model was developed to investigate CO2 migration pathways and uprising time in a shaly overburden, located in the Malaysian off-shore. Fluid flow and reactive transport simulations were performed by TOUGHREACT to evaluate the: (1) seepage through the caprock; (2) CO2-rich brine leakage through a fault connecting the reservoir with seabed. The effect of several factors, which may contribute to CO

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Arrofah, Muhammad, Mardiah Mardiah, and Janiar Pitulima. "Evaluasi Produktivitas Alat Gali-Muat dan Alat Angkut untuk Pengupasan Tanah Penutup Bulan Agustus 2016 Di Pit 3 Timur Penambangan Banko Barat PT Bukit Asam (Persero) Tbk." MINERAL 2, no. 2 (2020): 100–107. http://dx.doi.org/10.33019/mineral.v2i2.1564.

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PT Bukit Asam (Persero), Tbk is a state-owned enterprise that operates in mining industry, particularly coal mining that has 4 main mining location. One of them is an east pit 3 of Banko Barat mining managed by PT SumberMitra Jaya. Mining process is exploited by using open pit methode which excavate overburden material using load-haulage equipment and transport system. Load-haulage equipments are used excavate, and to load overburden material, and transport system are used to carry overburden in disposal. This whole processes known as mechanical mining system. However, the actual condition of

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Morozov, Alexey V., and Samuil Y. Levenson. "WAYS TO INCREASE THE EFFICIENCY OF ENGINEERING PROCESSES WHEN FORMING HIGH-DENSITY ARRAYS OF DISPERSE MATERIALS." Interexpo GEO-Siberia 2, no. 3 (2021): 295–303. http://dx.doi.org/10.33764/2618-981x-2021-2-3-295-303.

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One of the most important production operations in open pit mining is dumping. The depth of open pit mines increases constantly and the volume of overburden rocks also grows. Overburden is truck-delivered to the dumps. Fractional composition of overburden is diverse. In the early years, loose rocks were transported to the dumps from the upper horizons to the lower levels of the dumps, and in subsequent years - hard rocks. In this view, due to the low strength and stability of the dump mass, it is usually not possible to provide safe working conditions. The mining safety can be increased due to

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Salu, Sahrul Poalahi, and Chanro Silaban. "Perbandingan Tonase Kemajuan Tambang Menggunakan Metode Mine Survey Terhadap Realisasi Penambangan di Bukit Everest PT. Antam Tbk. UBPN Sulawesi Tenggara." G-Tech: Jurnal Teknologi Terapan 8, no. 1 (2024): 434–43. http://dx.doi.org/10.33379/gtech.v8i1.3789.

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Untuk mengetahui tonase realisasi penambangan dilakukan dengan dua metode yaitu metode timbangan dan metode Truck Count. Metode timbangan diterapkan untuk material High Grade Saprolite Ore (HGSO) dengan kadar Ni ≥ 1.80% sedangakan metode Truck Count diterapakan untuk dua material yaitu Low Grade Saprolite Ore (LGSO) dengan kadar 1.50% ≤ Ni <1.80% dan material overburden (OB). Penelitian ini dilakukan untuk membandingkan tonase realisasi penambangan dengan tonase kemajuan tambang menggunakan metode Mine Survey. Perhitungan tonase Mine Survey menggunakan bantuan software Surpac 6.3. Berdasark

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Lappegard, Gaute, and Jack Kohler. "Determination of basal hydraulic systems based on subglacial high-pressure pump experiments." Annals of Glaciology 40 (2005): 37–42. http://dx.doi.org/10.3189/172756405781813681.

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AbstractWe have conducted short-term pump experiments with pump pressures exceeding ice overburden to study the seasonality of the subglacial hydraulic system of Engabreen, Norway. Data were collected from load cells installed flush with the ice–bedrock interface and pressure transducers installed in boreholes leading from bedrock tunnels underneath the glacier to the ice–bedrock interface. The water-pressure recordings, seen in relation with the load-cell record, show the existence of hydraulically connected vs unconnected bed areas. Monitored boreholes have been used to inject water at high

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Li, Chuantian, Yongliang He, Xiaoyuan Sun, and Yuping Fu. "Fracture Evolution Characteristics and Deformation Laws of Overlying Strata during the Initial Period of Longwall Mining: Case Study." Sustainability 15, no. 11 (2023): 8596. http://dx.doi.org/10.3390/su15118596.

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Coal mining causes overlying rocks to collapse and be destroyed. Overburdened crevasses provide a channel for gas discharge, which is a serious safety hazard. To study the evolution characteristics and migration pattern of overburdened fissures during the initial mining period, the 24207 working face of the Shaquan mine was used as a research object. Through similar physical simulation tests, a mechanical model of the mining structure during the initial mining period was constructed to explore the factors influencing the movement pattern of the overburden strata during the initial mining perio

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Dreesen, David R., John T. Harrington, Anne M. Wagner, Leigh Murray, and Peixin Sun. "TESTING NATIVE GRASSES FOR SURVIVAL AND GROWTH IN LOW pH MINE OVERBURDEN." Journal American Society of Mining and Reclamation 2001, no. 1 (2001): 2–17. http://dx.doi.org/10.21000/jasmr01010002.

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Ramírez García, D., D. Baur, J. Grigat, et al. "GeMSE: a low-background facility for gamma-spectrometry at moderate rock overburden." Journal of Instrumentation 17, no. 04 (2022): P04005. http://dx.doi.org/10.1088/1748-0221/17/04/p04005.

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Abstract The GeMSE (Germanium Material and meteorite Screening Experiment) facility operates a low-background HPGe crystal in an underground laboratory with a moderate rock overburden of 620 m.w.e. in Switzerland. It has been optimized for continuous remote operation. A multi-layer passive shielding, a muon veto, and a boil-off nitrogen purge line inside the measurement cavity minimize the instrument's background rate, which decreased by 33% to (164 ± 2) counts/day (100 – 2700 keV) after five years of underground operation. This agrees with the prediction based on the expected decay of short-l

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Mancinelli, Dotting L. "Evaluation of superficial settlements in low overburden tunnel TBM excavation: Numerical approaches." Geotechnical and Geological Engineering 23, no. 3 (2005): 263–71. http://dx.doi.org/10.1007/s10706-003-6257-3.

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El-Aswad, Ali, Intesar Elagil, and Salem Fatooh. "STRESS EFFECT ON CEMENTATION FACTOR OF SANDSTONE ROCKS TYPE EVIDENCE FOR A VARIABLE ARCHIE POROSITY EXPONENT “m”." Scientific Journal of Applied Sciences of Sabratha University 1, no. 1 (2018): 50–66. http://dx.doi.org/10.47891/sabujas.v1i1.50-66.

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Ancient sandstones include important reservoirs for hydrocarbons (oil and gas). This research provides an experimental investigation on the influence of variations in confining pressure on cementation factor of two wells located in Sirt basin. Measurements of formation resistivity factor versus cementation factor for sandstone samples which were collected from both wells at different confining pressures were carried out. The Effects of confining stress on the electrical properties of the rock samples were studied and analyzed. The results showed that the confining pressure variations depend on

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Chen, Yiqi, Changyou Liu, Jinrong Liu, Peiju Yang, and Shuo Lu. "Case Study on Dynamic Identification of Overburden Fracture and Strong Mine Pressure Mechanism of Isolated Working Face Based on Microseismic Clustering." Sustainability 15, no. 1 (2022): 436. http://dx.doi.org/10.3390/su15010436.

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Strong mine pressure has a great impact upon the safety production of coal mines. Microseismic information provides a more advanced technical means for overburden fracture dynamic identification and mine pressure mechanism research, since it contains rich information on rock fracture sources. In this study, the isolated LW8102 working face in Tongxin Mine was investigated in order to propose a spatio-temporal microseismic event data analysis method based on the k-means clustering algorithm. This algorithm can handle dynamic identification of overburden fractures constrained by spatiotemporally

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Guo, Qiang, and Tariq Alkhalifah. "Datum-based waveform inversion using a subsurface-scattering imaging condition." GEOPHYSICS 84, no. 4 (2019): S251—S266. http://dx.doi.org/10.1190/geo2018-0615.1.

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Full-waveform inversion (FWI) solves model optimization problems by fitting simulated data to the observed data. The implementation of FWI requires involving as many physical features of the subsurface medium in the simulation as possible. The computation can be extremely costly and complex because the FWI algorithm usually deploys a consistent discretization over the entire model space, whereas a high-resolution analysis (and the accompanying complex physics) is often only required in the reservoir region. As an alternative, we have developed an FWI optimization scheme based on a convolution

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Ishola, S. A., O. O. Oyebolu, and P. R. Ikhane. "Mapping of Aquifer Characteristics and Reservoir Protective Capacity Variation in Obafemi-Owode Local Government Area, Ogun State South-West Nigeria." Nigerian Journal of Physics 33, no. 1 (2024): 88–107. http://dx.doi.org/10.62292/njp.v33i1.2024.208.

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Variation of Aquifer potential characteristics and its impacts on the groundwater subsurface protection of the aquiferous zone using electrical resistivity method was carried out at Obafemi-Owode Local Government Area, Ogun State South-West Nigeria with the principal purpose of assessing and rating aquifer protective capacity of the overburden units in the area. Twenty seven (27) vertical electrical sounding (VES) were conducted using Schlumberger configuration with the maximum electrode spacing of 100m at each point using Allied OMHEGA Resistivity meter. The data were interpreted using partia

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Wu, Pengfei, Zhenbo Gao, Jiaxu Jin, Fengmei Lian, Yanfeng Li, and Tao Liu. "Preparation of Paste Filling Body and Study on Supported Transportation Laws Using Flac3D Simulation." Coatings 14, no. 6 (2024): 743. http://dx.doi.org/10.3390/coatings14060743.

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This paper proposes a new type of gangue filling body (GFB) to address the issues of the low stability, strength, poor shrinkage performance, and inadequate seepage resistance of paste filling materials in overburdened mining conditions, as well as the challenge of fully utilizing solid waste gangue. The coal gangue (CG), U-expanding agent (UEA), and amount of water added were kept constant, and the mass ratio of the various components was adjusted to the design. The standard for filling was assessed using slump tests, uniaxial compression tests, shrinkage tests, and penetration tests. A furth

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Prabowo, Heri, Rahul Hutmi, and Indang Dewata. "Optimizing Digging Equipment Productivity Using Overall Equipment Effectiveness (OEE) Method in Coal Overburden Mining Activities." INVOTEK: Jurnal Inovasi Vokasional dan Teknologi 23, no. 2 (2023): 99–108. http://dx.doi.org/10.24036/invotek.v23i2.1097.

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Coal companies have an overburden stripping production target of 95,000 bcm in January 2022, while the realization of production with the Sumitomo SH 350 LHD excavator and Hitachi Zaxis 350 H excavator is only 77,000 bcm or 82% of the production target. The purpose of this study was to obtain an analysis of the productivity of the Sumitomo SH 350 LHD Excavator (40) and Hitachi Zaxis 350 H Excavator (31) in the overburden stripping activity in January 2022, analyze the obstacle factors that caused the available working hours to be reduced by using the Fishbone diagram method, get an analysis of

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Purnama, Muhammad, Slamet Budi Prayitno, Max Rudolf Muskananfola, and Suryanti Suryanti. "EXISTING CONDITION OF GASTROPODS COMMUNITY IN COASTAL AREAS AFFECTED BY NICKEL OVERBURDEN IN POMALAA DISTRICT, SOUTHEAST SULAWESI PROVINCE, INDONESIA." BIOTROPIA 32, no. 1 (2025): 69–86. https://doi.org/10.11598/btb.2025.32.1.2416.

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ARTICLE HIGHLIGHT The present investigation provides substantiated empirical evidence demonstrating that nickel extraction operations have exerted considerable detrimental effects on the ecological integrity of the Pomalaa coastal region in Southeast Sulawesi. Environmental degradation and disruption of ecological equilibrium have been observed as direct consequences of persistent overburden waste disposal. The introduction of mining overburden into the Pomalaa coastal ecosystem has resulted in the extirpation of critical gastropod taxa and significant population reductions among persisting sp

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Kim, Byeong-Su, Satoru Shibuya, Seong-Wan Park, and Shoji Kato. "Application of suction stress for estimating unsaturated shear strength of soils using direct shear testing under low confining pressure." Canadian Geotechnical Journal 47, no. 9 (2010): 955–70. http://dx.doi.org/10.1139/t10-007.

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The primary objective of this study is to evaluate effects of suction on shear strength of unsaturated soils under low confining pressure and to examine the relationships between suction, shear strength behavior, and volumetric deformation using newly developed direct shear testing equipment for compacted weathered granite soils. The soil-water retention curves (SWRCs) of unsaturated soils were obtained under various overburden pressures. To analyze test results from the direct shear test under unsaturated conditions, a new method, suction stress–SWRC method (SSM), is proposed to determine the

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Pickering, L. A., and G. J. lndelicato. "Abnormal Formation Pressure: A Review." Mountain Geologist 22, no. 2 (1985): 78–89. http://dx.doi.org/10.31582/rmag.mg.22.2.78.

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Abnormal formation pressure is defined as any pressure that deviates from the normal hydrostatic gradient. In order for these pressures to form and be preserved, a near-seal is required. The seal is not necessarily impermeable but may be a low permeability formation, such as shale, or a fault-related barrier. The possible causes of abnormal formation pressure are: 1) compaction of sediments, 2) tectonic activities, 3) temperature changes, 4) osmosis, 5) diagenesis, 6) methane generation, and 7) buoyancy. Temperature changes due to decay, diagenesis, and changes in burial depth of the formation

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Barantseva, S. E., A. I. Pazniak, Y. A. Klimosh, I. M. Azaranka, N. N. Hundzilovich, and A. V. Pospelov. "Heat-insulating porous material based on glauconite-containing sands and aleurites of the Novodvorskoye deposit of the Republic of Belarus." Proceedings of the National Academy of Sciences of Belarus, Chemical Series 57, no. 4 (2021): 463–71. http://dx.doi.org/10.29235/1561-8331-2021-57-4-463-471.

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The results on the research of heat-insulating porous ceramic materials produced using overburden rocks of the Novodvorsk deposit of Pinsk district of the Brest region as the main component of raw materials are presented in the study and the use of bulk rock consisting of glauconite sands and aleurites is recommended. Low-melting clay, basalt and a blowing agent are used as additional components, rational combination of which would ensure the forming ability of ceramic masses and the required set of the physicochemical properties of the material. The dependence of the bulk density, swelling co

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Bhaskar, Kiran Lata, and Bhagyadhar Bhoi. "Iron and Nickel Enrichment in Low Grade Chromite Overburden to Produce Ferronickel Alloys." Transactions of the Indian Institute of Metals 74, no. 6 (2021): 1321–32. http://dx.doi.org/10.1007/s12666-020-02176-4.

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Harrington, J. T., D. R. Dreesen, A. M. Wagner, L. Murray, and P. Sun. "RESULTS OF SPECIES TRIALS ON LOW pH OVERBURDEN MATERIALS FOR MINE LAND RECLAMATION." Journal American Society of Mining and Reclamation 2001, no. 1 (2001): 112–20. http://dx.doi.org/10.21000/jasmr01010112.

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Guo, Qiang, and Tariq Alkhalifah. "Target-oriented waveform redatuming and high-resolution inversion: Role of the overburden." GEOPHYSICS 85, no. 6 (2020): R525—R536. http://dx.doi.org/10.1190/geo2019-0640.1.

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Target-oriented inversion (TOI) is an approach aimed at enhancing the ability of full-waveform inversion (FWI) to achieve a high-resolution delineation of a reservoir. FWI has demonstrated its potential to address the challenge of imaging complex structures on a considerable number of field data applications. Nevertheless, it is still impractical costwise to implement FWI with the full band of seismic data because, in this case, we need to discretize the whole subsurface model space with a fine grid to handle the high frequencies and satisfy the interpretation of, for example, reservoir-scale

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Buselli, G., K. G. McCracken, and M. Thorburn. "Transient electromagnetic response of the Teutonic Bore orebody." GEOPHYSICS 51, no. 4 (1986): 957–63. http://dx.doi.org/10.1190/1.1442153.

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Transient electromagnetic (TEM) measurements have been made with SIROTEM on four separate surveys over the Teutonic Bore orebody (Western Australia), both before mining operations began and subsequently during different stages of stripping overburden from the mineral deposit. In the late stage of the transient decay the target response was relatively free of the overburden and host‐rock response. Beyond ∼ 6 ms, the maximum anomalous response was a factor of 8 to 10 greater than the combined overburden and host‐rock response. Analog modeling with a copper plate in free space shows that the TEM

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Ganesh, P., Dishwar Kumar, S. Agrawal, Mandal Kumar, N. Sahu, and O. P. Sinha. "Feasibility of nickel extraction from Indian chromite overburden by solid state reduction and smelting route." Journal of Mining and Metallurgy, Section B: Metallurgy 56, no. 2 (2020): 229–35. http://dx.doi.org/10.2298/jmmb190908007g.

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The present work demonstrates the extraction of nickel from low-grade chromite overburden by using solid state reduction and direct smelting route. Goethite & Quartz are present as major phases whereas chromite, hematite were identified as minor phases in the mineral. Solid state reduction of pellets were carried out inside a horizontal tube furnace at 1000?C, 1200?C, 1400?C for 30, 60, 90 and 120 minutes respectively with creating reducing atmosphere. Pellets of varying basicity (i.e. 0.5, 0.6, 0.7, 0.8 and 0.9) were used directly in the EAF for smelting studies. Highest percent of nickel

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Sunderland, Andrew, Ray Lockwood, Li Ju, and David G. Blair. "Low-frequency rotational isolator for airborne exploration." GEOPHYSICS 82, no. 2 (2017): E27—E30. http://dx.doi.org/10.1190/geo2015-0521.1.

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We have determined the performance of a passive rotational vibration isolator for a time-domain airborne electromagnetic (TDEM) receiver. The isolator uses neutrally buoyant flotation to provide very soft suspension and a very low resonant frequency of 0.065 Hz ± 0.005 Hz. One of the limitations of mapping deeper targets in areas of conductive overburden with TDEM systems is that low-frequency coil-vibration noise provides a lower bound to the transmitter base frequency (typically limited to 25 Hz). The purpose of this new isolator is to improve coil vibration related noise between 5 and 20 Hz

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Hou, Jing Feng, Dong Ming Guo, Hui Dong Xu, and Zeng Kun Yang. "Experimental Study on Impermeability and Frost Resistance of High Strength Concrete Used in Shaft of Coal Mine." Advanced Materials Research 287-290 (July 2011): 1019–23. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.1019.

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This paper presents results of impermeability and frost resistance tests of a series of high strength concrete which will be used in Yuncheng coal mine shaft lining. And the shaft is one of the most difficult to construct using freezing method because of the extreme thick overburden soil. The results show the impermeability and frost resistance of the selected concrete mix proportion options can meet the special requirements of the shaft construction. It’s due to the low water-cement ratio, admixture and water-reducing agent decreases void caused by excess water. And the composite mineral admi

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Li, Jian, Dayang Xuan, Jialin Xu, Zebin Dong, and Chaochao Wang. "Compaction Response of Mining-Induced Rock Masses to Longwall Overburden Isolated Grouting." Minerals 13, no. 5 (2023): 633. http://dx.doi.org/10.3390/min13050633.

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Surface subsidence in coal mine areas can cause serious geological hazards. After a coal seam is mined, the overlying rock layers fracture, collapse, and expand; the fractured and bulking rock masses are then continuously compacted under the action of overburden load, which eventually leads to surface subsidence. Overburden isolated grout filling via surface boreholes, and high-pressure grouting to mining-induced fissures under the hard rock layer, uses the grouting pressure to compact the lower fractured and bulking rock masses in advance, replacing the subsidence void and effectively control

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