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With the focus of traffic infrastructure construction gradually shifting to the central and western mountainous areas and karst areas, coal mine and underground engineering construction often face the baptism of complex structures, great changes in geological environment, and many disasters and accidents [].Water inrush is a serious …
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(a) Contour map of depth to underground water before coal mining, (b) Contour map of depth to underground water after coal mining (Yao et al., 2020a). Referencing to successful cases and considering the ecological characteristics of abandoned coalmines in China, Xie et al., 2015, Yuan et al., 2018, and Gu (2015) have …
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This book is divided into nine key areas of underground mining. Beginning with a new look at conventional and continuous mining. The book covers advanced mining techniques, longwall mining, underground haulage, and control of roof, ventilation, dust, and methane. There are also extensive sections on coal transportation, maintenance, …
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Step 3. For the sensor's reading, the sensor's output is connected to an Arduino analog input. So, the Arduino will read the input data from the sensors like the humidity and temperature of the room. …
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China is the largest coal producer in the world and accounts for almost half the total coal production worldwide. Moreover, 90% of China's coal is obtained from underground mining (Hu et al. 2010; Wang et al. 1986; Wang et al. 2018).The hydrogeological configurations and conditions associated with underground mining are …
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1. Introduction. Worldwide, underground coal mining is recognized as one of the riskiest operations in terms of occurrences that can lead to fatal or nonfatal injuries (Sari et al., 2004, 2009; Paul, 2009; Shahriar and Bakhtavar, 2009; Onder et al., 2014).China is the largest underground coal producer in the world (Liu et al., 2016; Liu …
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Underground coal mining is recognized all over the world as one of the riskiest industrial operations (Paul, 2009; Shahriar and Bakhtavar, ... This theory suggests a continuum of possible leadership behaviour that is available to a manager, and along this continuum, many leadership styles can be placed from autocratic (boss-centred …
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Theory framework and technological system of coal mine underground reservoir | Semantic Scholar. Corpus ID: 130358127. Theory framework and technological system …
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by J.M. Galvin. The book by Emeritus Professor Jim Galvin on Ground Engineering - Principles and Practices for Underground Coal Mining is not just another rock mechanics text but fills a serious gap in the mining and rock mechanics literature as it establishes a link between ground engineering, mine management, and risk management.
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A water storage structure model for coal mine underground water reservoirs was established, taking into account the settlement boundaries of the bedrock …
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The combustible and noxious gases are among the prominent issues affecting the life and the mining operations of underground coal mines (UCMs). Commonly adopted hazard monitoring methodologies in UCM are fuzzy, rule-based systems, statistical methods, and other expert systems, but these models are not reliable …
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So coal is still an important energy source. To date most of the coal production is from underground coal mining operation. In the case of underground mining, the working space is relatively confined.
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A water storage structure model for coal mine underground water reservoirs was established, taking into account the settlement boundaries of the bedrock and loose layers in shallow coal seams, based on the key layer theory and the spatial structure model of the mining roof. The mathematical expression for the load on the coal …
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The problem of subsidence and damages on buildings above mining works is an inevitable consequence of underground coal mining in large mining basins. Significant development of various methods for prediction of the displacement parameters of the undermined terrain took place in the period from the middle of the last to the …
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In this study, an optimization model was established based on the generalized contrastive weighted comprehensive scale index method. This model gives the evaluation indicators of SO2, NOx, CO, and TSP. It also innovatively introduces gas, the most harmful substance in underground coal mines, into the evaluation indicators. …
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In this study, the hazards occurring in different sections of underground mining have been categorized, and associated risks have been predicted using different …
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Therefore, exploring the mechanism of multifactor risk and measuring the coupling risk is particularly important for controlling coal mine accidents. This paper …
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The triggering factors of coal and gas outburst disasters are complex and influenced by the coupling of gas, in situ stress, and mechanical properties of coal (Wang et al., 2022, Xue et al., 2020; Zhou et al., 2020a).At the early stage of mining, the basic parameters that are easy to test and directly related to the outburst risk are usually …
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A systematic method was developed to evaluate the risk of water inrush through a coal seam floor using the geographic information system (GIS) and the fuzzy set theory. The main geological and hydrogeological indicators that control water inrush were first considered using a fuzzy mathematics approach, in which fractal analysis was …
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The overburden subsidence induced by underground mining has caused great damage to the ecological environmental and seriously threatens the safe use of underground structures. Focusing on the overburden subsidence, this paper uses theoretical analysis method to study the overburden subsidence boundary with a …
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Studying theory and practice of emergency refuge in mining-developed countries have reference and practical performance on domestic construction of emergency refuge system in underground coal mine. In Canada, research of underground emergency refuge system firstly began at Hollinger mine fire accident …
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When mining underground coal resources, different mining methods have different levels of environmental impacts. To identify the mining method with the …
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This research utilized the variable weight theory (VWT) and improved the matter-element extension model (MEEM) to conduct an indicators sensitivity analysis of environmental engineering geological patterns (EEGPs) related to underground coal mining.First, four types of EEGPs, i.e., basically unaffected model, gradually restored …
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Grade control in underground mines aims to deliver quality tonnes to the process plant via the accurate definition of ore and waste. It comprises a decision-making process including data collection and interpretation; local estimation; development and mining supervision; ore and waste destination tracking; and stockpile management. The …
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The EEGPs caused by coal mining are often the comprehensive effect of lithosphere, hydrosphere, biosphere, and coal mining conditions. To study the zoning for EEGPs in underground coal mining areas, the Yushenfu mining area was taken as an example. The mechanism of EEGPs caused by mining was elucidated, and four types of …
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The surface subsidence caused by underground mining is a global problem. The surface subsidence caused by underground mining attracted the attention of people in the mining field and related fields in the mid-19th century, and gradually formed the current mining subsidence prediction theory . In 1838, the Belgian engineer Gonot …
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Mining. In Australia, nearly 80% of coal is produced from open-cut mines, in contrast to the rest of the world where open-cut mining only accounts for 40% of coal production. Open-cut mining is possible because coal seams are close to the surface. Such mining is cheaper than underground mining and enables up to 90% recovery of …
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2.1 System Introduction. The technical method system for gob-side entry retaining, flat layer gas drainage, and not digging rock bottom pumping gas roadway of the rock is proposed on the basis of the existing construction of Lin Hua Coal Mine, which means that the technology of gob-side entry retaining is used to retain the return airway …
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In order to clarify the impact of underground coal seam mining on the stability and slippage of the loess slope, theoretical analysis, numerical simulation and physical similarity simulation experiments are …
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Abstract. Underground coal mining leads to land subsidence, which, in turn, results in damage to buildings and infrastructure, disturbs the original ecological environment, and hinders the ...
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Abstract. As one of the dynamic disasters of coal mines, rockburst seriously affects underground safe coal mining. Based on the laboratory test, field test, …
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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 …
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Underground coal mining in South Africa accounts for 51%, long wall mining and room-and-pillar mining are main methods. Shelter as blind lane withcompressed air emerged in 1970s, while, study for
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Deep rock mechanics & mining theory: Research progress: Technical system of in-situ rock mechanical tests Deep rock mechanics and mining method Experiential study of 3D virtualized mining [23] ... WSN technique in underground coal mines has potential to achieve transmission with high accuracy and reliability. Moreover, …
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The following topics are addressed in twelve chapters: scope of ground engineering, fundamental principles of ground engineering, excavation …
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An example study was conducted on a mine of a large state-owned coal mine enterprise in Shaanxi Province, China. The results show that the method helps coal mine enterprises to accurately assess gas explosion risks, identify weak links in risk prevention and control, and provide a powerful means for continuous improvement of risk …
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