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integral part of coal mining
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integral part of coal mining
Theory and practice of integrated coal production and gas
By including gas drainage as part of the regular coal mining process, the traditional single coal resource mining pattern is transformed into an integrated The mining-separating-backfilling integrated coal mine production logistics system is a complex DEDS and mainly consists of three subsystems: the system of fully Simulation and optimization of mining-separating
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Sustainability Free Full-Text Evaluation Model
Coal Mine Intelligent Construction Evaluation Index System. The evaluation index system of the intelligent construction of coal mines is an evaluation standard to measure the intelligent degree of The paper researched and practiced the key technology related to the high efficient and adaptive shearer autonomous positioning technology, shearer autonomous obstacle Research and Practice of China's Intelligent Coal Mines
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The optimal framework and model to balance underground coal mining
Coal and cropland respectively play a role in ensuring national energy security and food security. However, coal mining has caused large areas of arable land Land reclamation is an integral part of modern mining operations around the world. Reclaimed land can have many uses, including agriculture, forestry, wildlife habitation and recreation. Steps are taken in modern coal mining Coal Mining Technologies World Coal Association
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Concurrent mining and reclamation for underground coal mining
1 Background China is currently the largest producer and consumer of coal in the world. According to the BP Statistics ( 2015 ), China produced about 3.75 billion mt Advances in Coal Mine Ground Control Book • 2017 Edited by: Syd S. Peng About the book Browse this book By table of contents Book description Advances in Coal Mine Ground Advances in Coal Mine Ground Control ScienceDirect
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(PDF) Research and practice of intelligent coal
The top-level architecture of 5G+ intelligent coal mine systems combines intelligent applications such as autonomous intelligent mining, human–machine collaborative rapid tunneling, unmannedCoal resources distribution and subsidence related surface damage characteristics.Proven coal reserves are estimated as 1.53 trillion mt as of 2015 and rank third in the world (Xiao et al. 2014a, b).Their distribution is shown in Fig. 1.The degree of subsidence-related damage in different mining regions varies due to the geological and Concurrent mining and reclamation for underground coal mining
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A novel probability integral method segmental modified
Assuming that the thickness of the coal seam is m, the dip angle of the coal seam is α, and the final coal seam mining forms a rectangular mining area with a strike length of D 3 and an inclination length of D 1; the maximum subsidence caused by the coal seam roof is \({W}_{0}=mq\mathrm{cos}\alpha\), where q is the subsidence coefficient. Solid backfill technology, which can achieve precise control of surface subsidence, has become the primary method used to extract “under three” coal resources (under railways, buildings, and water bodies), especially under buildings. This paper proposes a probability integration model for surface subsidence prediction based on the Surface subsidence control theory and application to backfill coal
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Mining subsidence prediction for multi-seam and non
Ground subsidence associated with underground mining has caused environmental and economic damage in coal mining areas. So it is important to predict mining subsidence prior to any coal extraction. In order to predict mining subsidence based on probability integral model, we present a triangle subsection method for mining Coal mining activities have resulted in multiple environmental and social impacts, such as waste management, deforestation, acid mine drainage, increase in noise levels, dust, contamination of local streams and wetlands, and contamination of soil profiles [1,2].Global energy demand occasioned by continuous growth in “commodity frontiers” [], Sustainability Free Full-Text Environmental Impacts of Coal
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Advances in Coal Mine Ground Control ScienceDirect
Key Features. Written and edited by the world’s leading experts on ground control in coal mining. Covers all aspects of ground control practices in coal mines. Focuses on advances over the past decade, equipping readers with the most up-to-date knowledge regarding current research and practices in the field.Surface subsidence caused by underground coal mining has received wide attention due to its impact on the ecological environment. To obtain first-hand data on mining subsidence, we arranged line measurement stations in the mining area of the Weiqiang coalfield and implemented surface movement observation at its first mining working face Sustainability Free Full-Text A Novel Analytical Model of Mining
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Line integral method for predicting surface subsidence in
The subsidence prediction method is very important for predicting the negative impact induced by coal mining.Probability integral method is an important method for mining subsidence prediction, but for irregular working face mining, its prediction accuracy needsTo solve the problems of backward means of coal mine gas and coal dust explosion monitoring, late reporting, and low leakage rate, a sound recognition method of coal mine gas and coal dust explosion based on GoogLeNet was proposed. After installing mining pickups in key monitoring areas of coal mines to collect the sounds of the working Sound Recognition Method of Coal Mine Gas and Coal Dust
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Extraction of Irregularly Shaped Coal Mining Area
Extraction of Irregularly Shaped Coal Mining Area Induced Ground Subsidence Prediction Based on Probability Integral Method Xianfeng Tan 1,2, Bingzhong Song 1,2, Huaizhi Bo 1,2, Yunwei Li 3The entire overburden stratum above a coal mining area is considered to be composed of an alluvial soil layer and a bedrock layer. In underground mining, alluvial soil has a major effect on ground subsidence. This effect is especially significant and not negligible when the alluvial soil accounts for a large proportion in the entire overlying Combined prediction model for mining subsidence in coal mining
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(PDF) Extraction of Irregularly Shaped Coal Mining
Extraction of Irregularly Shaped Coal Mining Area Induced Ground Subsidence Prediction Based on Probability Integral Method September 2020 Applied Sciences 10(18):6623This paper is devoted to solving the problem of how to comprehensively control coal seam gas and hydrogen sulfide in the mining face, distributed from the coal seam in abandoned oil wells in coal mining resource areas. The abandoned oil wells of Ma tan 30 and Ma tan 31 in the No. I0104105 working face of the Shuang Ma Coal Mine Energies Free Full-Text Study on the Distribution Law of Coal
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Water Hazard Control Technology Based on Integral
The great mining depth of the Xingdong mining areas means that the water pressure of the conned karstic water below the coal oor can be very high. Where collapsed pil-lars and faults and fractured zones connect the Ordovician limestone with the mined seam, a water inrush passage can be formed. The drilling engineering was arranged by Mining has been an integral part of West Virginia for over a century and is a leading contributor to GDP growth in the State. In 2016, the mining industry of West Virginia contributed $4.6 billion to the GDP of the state. The same year, the mining industry employed about 12, 566 West Virginians translating to 1.8% of the total workforce.What Are The Biggest Industries In West Virginia? WorldAtlas
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Coal pillar size design and surrounding rock control
The width of coal pillar in mining-influenced entry is significantly affected by the formation and expansion of the plastic zone. Figure 6 shows the evolution of the plastic zone as a function of coal pillar size. When the coal pillar width is Between 2008 to 2019, coal mining jobs fell by over a third. According to our latest estimates, global coal mining jobs amount to just 4.7 million. Traditional labor policy instruments are an integral part of governments’ toolkits—but they are often not enough to achieve a “just transition” for all affected workers and communities.Tackling the jobs challenges of coal transition World Bank
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problems of coal mining regions Tatyana Galanina et al-This content was downloaded from IP address 207.46.13.210 on 17/01/2022 at 01:07. posed by mining enterprises by the integral indicator of dust emission. 2. Study objects and methods As the objects of research, we chose the largest mining enterprises of the Irkutsk Region, which A coal production system is a complex social technology system, and its dynamic and nonlinear characteristics are affected by internal and external factors (He and Song, 2012; Zhang et al., 2020).The occurrence of a coal mine accident depends not only on human factors, machine factors, and environmental factors but also on more Connotation, characteristics and framework of coal mine
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Applied Sciences Free Full-Text Energy Evolution Analysis of Coal
Coal rocks often contain calcite, which has a significant effect on the mechanical properties of coal and the energy evolution during rupture damage. In this study, the meso-scale of rock is considered, and the spatial distribution of the internal structure of coal is characterized by digital image technology. Uniaxial compression tests were
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