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1 INTRODUCTION. Since the technology of fully mechanized top-coal caving (FMTC) was first applied in the 1950s, with full development, it has become one of the landmark achievements in the field of coal mining in China, 1 and been recognized around the world. 2, 3 The studies of basic theories of FMTC mainly focus on the …
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1. Introduction. Dust is one of the inherent products of coal mining, in which the problem of dust pollution in fully mechanized mining face is particularly prominent, seriously pollutes the working environment and causes occupational diseases such as pneumoconiosis [1], [2], [3].According to the U.S. Department of labor, continuous and …
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1. Introduction. Today, with the continuous growth of global energy demand, coal, as a crucial energy resource that has served industrial production for centuries, still plays a vital role in the modern energy system [1,2,3].It is currently widely used in electricity generation and industrial manufacturing, providing reliable energy support for societal …
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operations of fully mechanized coal mining and solid waste dense stowing. The supporter can ensure safe and effective coal mining and dense stowing at the same time.
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Thick and ultra-thick coal seams are main coal seams for high production rate and high efficiency in Chinese coal mines, which accounts for 44 % of the total minable coal reserve. A fully mechanized top-coal caving mining method is a main underground coal extraction method for ultra-thick coal seams. The coal extraction technologies for …
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In 73 down 23 fully mechanized coal face in Nantun Coal Mine (located in Jining City, Shandong Province, China), air distribution capacity of working face was 2000 m 3 /min, the height and width of the intake airflow roadway were 3.5 and 4.2 m, respectively, cross-section area was 14.7 m 2, and wind speed of intake airflow roadway …
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In view of the present situations and existing problems of thin coal seam mining under complex geological conditions, low-profile mining equipment for fully …
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The large dip angle coal seam refers to the coal seam with a buried dip angle of 35°∼55°. Due to its special geological conditions, it is difficult to mine coal seams (Wu et al. 2014).With the high-intensity mining of shallow coal seams in the central and eastern provinces, the reserves of these 'superior' coal seams are less and less, so the …
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China's need for energy resources is growing every day. Future energy demands will be partly met by low-temperature pyrolysis of oil-rich coal, which is a form of coal-to-oil technology. Under the existing fully-mechanized coal mining technology, oil-rich coal is mechanically broken into different particle sizes by a shearer and used in …
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Mining with goaf simple backfilling has been utilized in a few countries with small scale since several decades. ... A fully mechanized dense stowing system has different designs and layouts with long-wall coal mine …
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1. Introduction. Coalbed methane (CBM) accidents are related to 90% of major accidents in coal mines, causing serious casualties and property losses, and posing a significant threat to the productivity of the coal mine [1, 2].In recent years, with the continuous improvement in national safety technology and safety levels, as well as the …
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The mining environment of thin coal seam working faces is generally harsh, the labor intensity is high, and the production efficiency is low. Previous studies have shown that thin coal seam mining finds it difficult to follow machines, does not have complete sets of equipment, has a low degree of automation, and has difficult system co-control, which …
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In view of the difficulty of dust control in fully mechanized mining face, the mechanism of barrier and closure dust control proposed in this study is as follows, in Fig. 2.When fresh air enters the fully mechanized mining face from the intake tunnel, the fresh air flowing along the coal wall side is blocked by the wind baffle, and enters the sidewalk …
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scale coal mines with an annual output of more than 1.2 ... ment of fully mechanized mining, leading to a complete set of technologies and equipment for fully mechanized mining in thin and medium ...
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The mining environment of thin coal seam working faces is generally harsh, the labor intensity is high, and the production efficiency is low. Previous studies have shown that thin coal seam mining ...
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We focused on the intelligent development of coal mines, and introduced the "Chinese mode" of intelligent mining in underground coal mines, which uses …
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The case of Huangling Mine shows that the intelligent mining is an effective method of unmanned mining in fully-mechanized coal mining face, and has the application value of promotion in thin and relatively thin seam where the geological condition is good. In view of the complexity of the production process,large mining equipment system and harsh …
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seam mining finds it difficult to follow machines, does not have complete sets of equipment, has a low degree of automation, and has difficult system co-control, which easily causes production ... 16,108 intelligent fully mechanized coal mining faces, which realizes the automatic following of underground support and the control of adjacent ...
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As the core equipment for fully mechanized coal mining, hydraulic support can provide a safe working face, and to move the scraper conveyor and shearer in the working face3. …
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development of low-profile mining equipment, fully mechanized mining of thin coal seams under the complex geological conditions was achieved. The development equipment has great potential to be widely applied in coal mines with similar conditions. Keywords: Thin coal seam, Fully mechanized coal mining, Coal shearer,
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A fully mechanized top-coal caving mining method is a main underground coal extraction method for ultra-thick coal seams. The coal extraction technologies for coal seams less than 14 m thick were extensively used in China.
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In order to study the harm of respirable dust in fully mechanized coal mining face and reduce the degree of dust hazard, individual sampling and fixed-point sampling method were used to detect the ...
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In order to study the movement pattern of dust generated during support advancing and shearer cutting at # 42,112 fully mechanized mining face in Liangshuijing Coal Mine, a mathematical and physical model were established and the simulation based on gas-solid two-phase flow interaction was carried out.
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The 3D top coal caving angle model was developed based on the on-site measurement data. ABC and PQR represent the roof and top coal caving face of a fully mechanized caving face, respectively (Fig. 5 a). To calculate the top coal caving angle effectively, an OXYZ 3D coordinate system was established with point O as the origin, …
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Fully mechanized mining (FMM) technology has been applied in Chinese coal mines for more than 40 years. At present, the output of a FMM face has reached 10-million tons with Chinese-made equipment.
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In the context of the complex geological conditions such as large thickness variation of thin-medium-thick coal seam, development of strike fault and broken roof in Southwest China, intelligent fully mechanized mining support technology and equipment for thin-medium-thick coal seam are proposed.Through the implementation of grouting reinforcement …
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In this study, the ANSYS Fluent commercial CFD code was used to compute the airflow and heat and mass transfer in a fully mechanized coal-mining face. The airflow in a fully mechanized coal-mining face was regarded as the background fluid that imposed a direct effect on the movements of droplets [22, 23]. Using the Eulerian …
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This paper analyzes the automatic control and performance of the fully mechanized mining face in the coal mine, and constructs an intelligent control system …
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In order to effectively solve the problems existing in thin coal seam mining, Binhu Coal Mine has established intelligent fully mechanized mining and actively …
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The stability of tailgate plays an important role in the safety mining of working face. In the present work, a tailgate of Tongxin mine in north Shanxi Province, China, has been taken as the research background; the non-repeated and long-distance advance support technology (NLAST) has been studied by theoretical analyses and field …
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