The mining eciency helps the miners to provide the same amount of output by using minimum input. Meanwhile, in the mining site, the mining efficiency improves the eciency of haul truck drivers with minimum energy and fuel. It can also mean that mining operators can monitor more equip-ment simultaneously. As a result, complicated seams fre-
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Abstract. In order to monitor the press of mining roof in combined face, the paper design a coal mining roof pressure monitoring system. The system includes roof pressure testing device ...
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Overall Structure Design of GIS System. Coal mine safety monitoring GIS system based on intelligent terminal is a visual monitoring platform based on geographic data and the comprehensive use of geographic information system, mobile communication, network, and other technologies. It provides fast, accurate, and visual information …
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non‑caking coal in the Chicheng Coal Mine was established on this basis. The molecular formula of non‑caking coal in Chicheng Coal Mine was determined to be C 207 H 181 O …
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Coal is a natural mixture, and its structure is complex, diverse and heterogeneous, and dierent coal ranks have dierent structures. e molecular structure of coal refers to the …
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DOI: 10.1016/j.ijrmms.2023.105633 Corpus ID: 266584768; Three-dimensional velocity structure of a coal mine revealed by induced microseismic traveltime data @article{Song2024ThreedimensionalVS, title={Three-dimensional velocity structure of a coal mine revealed by induced microseismic traveltime data}, author={Chunting Song …
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According to physical simulation and theoretical model, the maximum surface subsidence of -2 seam mining in Ningtiaota coal mine are 1.1 m and 1.07 m respectively, which is basically ...
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Underground coal mine explosions pose a significant threat to infrastructure such as mine seals and refuge alternative chambers. After a mine seal failed in the Sago mine disaster, which took the life of 12 miners, design requirements were reexamined and improved. However, most research being completed on the analysis of mine structures during
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Formulation of coal mining projects by expert system. Mine project planning is beset with various anomalies of geological reserves, quality of coal or mineral, availability of infrastructure ...
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This paper presents a phase planning method specially designed for coal deposits with nearly horizontal, bedded coal seams. The geology of this type of deposit is modeled into a column model, instead of a block model, to avoid coal-rock mixing in blocks. A nested pit generation algorithm is developed for producing a series o…See more on hindawi
Webproblems of mine design, and are an ideal introduction to engineering design concepts in coal mining. 2.1 Stresses acting on pillars Despite the simplicity of the structure, and …
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In the N00 coal mining method, one of the most critical issues is ensuring the safety of the entry behind the working face. To address this challenge, various roof control techniques, such as precise directional roof-cutting technology (PDRCT), constant-resistance cable supporting technology (CRCST), and dynamic pressure-bearing …
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Based on the structures and rock quality, a new mine design is proposed. According to new design and safety factor, coal extraction percentage could be increased from the existing 24.2% to 52%.
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Ground control failures continue to be one of the leading causes of injuries and fatalities in underground coal mining. The roof, rib, floor, and pillars are four areas of potential ground failures that miners, engineers, and consultants are continually evaluating. Quite often, these four underground structures are evaluated independently. A recent …
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According to the geological data of the Xiaojihan coal mine: the average overburden depth (H) of the coal seam is 317 m, the natural water content of the coal seam is 3.31%, the design mining rate is 20 m/d, and the average bulk density of the overlying strata is 0.0027 kN/m. The height of the section coal pillar is 5 m, the cohesion …
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About Us. Central Mine Planning & Design Institute Limited (CMPDI) is a Government of India enterprise having its corporate headquarters at Ranchi in India. It is a fully owned subsidiary of Coal India Limited (CIL) and a Schedule-B company. It is a Mini Ratna (Category I) company since June 2019 and ISO 9001 certified since March 1998.
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Coal Mine Structures is based on a six-year study, carried out at the University of Newcastle upon Tyne between 1976 and 1982 and financed by the National Coal Board and the European Coal and Steel Community (Projects 7220 - ACj806 and 7220 - ACj814), into the behaviour of under ground openings in British coal mines. The original …
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The design and methods of coal mining is made up of the use of land, labor, and capital to remove, mine, or extract coal from a reserve, utilizing a planned and systematic …
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About this book. Coal Mine Structures is based on a six-year study, carried out at the University of Newcastle upon Tyne between 1976 and 1982 and financed by the National Coal Board and the European Coal and Steel Community (Projects 7220 - ACj806 and 7220 - ACj814), into the behaviour of under ground openings in British coal mines.
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Emulsion pump station is widely used to provide power for full-mechanized coal mining face equipment. With the development of the mining technique of longwall face and the extensive use of large ...
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Generally, the water-bearing structures of coal mines mainly include coal seam, roof, coal seam, floor, and goaf, while the main water-conducting structures include faults, collapsed columns, and collapsed goaf areas. The most commonly used methods for the detection of the above structures include the seismic method, high-density electrical …
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Mine safety and quality of life of miner working in underground mines depend to a large extent on mine illumination and communication. The provisioning of reliable, safe, and cost-effective illumination is critical, particularly in underground gassy coal mines. To prevent firedamp explosion by electrical switching operation in coal mining industry …
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The design and methods of coal mining is made up of the use of land, labor, and capital to remove, mine, or extract coal from a reserve, utilizing a planned and systematic approach called a mine plan. A reserve of coal is represented by a seam of coal, which is a layered deposit of the mineral. A coal reserve is.
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The basic idea of developing the organizational structures of industrial enterprises is the division of tasks in such a way as to ensure the effective functioning of the territorial-property complex of the company and the fulfillment of its tasks. To improve performance indicators, the possibility of unifying the management model is equally ...
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A three-step design procedure for coal mine seals is presented that follows design codes and design criteria developed by the military for design of protective structures. The procedure involves (1) design inputs where the design pressure-time curve, material properties, and seal geometry are specified, (2) foundation design where shear forces ...
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You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
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The systematic planning and design process for underground coal mining operations – from inception to closure 1. PHASE 1: INVESTIGATIVE STUDIES 1.1 Market analysis The mine planning and design process for any new coal mining operation commences with the identification and analysis of specific market needs and requirements. These needs and
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Land subsidence from coal mining has shaped new artificial aquatic ecosystems, these subsidence lakes are known for their restricted ecological system, water pollution, and extreme habitat conditions. However, knowledge concerning the community structure of plankton in these types of water bodies is still limited. Therefore, both …
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The mining eciency helps the miners to provide the same amount of output by using minimum input. Meanwhile, in the mining site, the mining efficiency improves the …
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Surface mining techniques can be broadly cl assified into the following types: (1) contour strip mining, (2) area strip mining, (3) open-pit mining, and. (4) auger mining. 6.1 Contour strip mining ...
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Coal - Carbon, Organic Matter, Sedimentary Rock: The plant material from which coal is derived is composed of a complex mixture of organic compounds, including cellulose, lignin, fats, waxes, and tannins. As peat formation and coalification proceed, these compounds, which have more or less open structures, are broken down, and new …
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