A Critical Review of Indian Underground Thick Coal …
The (LTCC) method is used extensively deployed for extracting thick and extra thick coal seams in China with more than 100 faces producing over 200 MT in conditions ranging …
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The (LTCC) method is used extensively deployed for extracting thick and extra thick coal seams in China with more than 100 faces producing over 200 MT in conditions ranging …
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A novel method for UG extraction of a critically thick coal seam standing on pillars and the development made along the roof horizon. Minetech 23, 1, 2, and 3–11 (2002) A. Kushwaha, S.K. Singh, S. Tewari, A. Sinha, Empirical approach for designing of support system in mechanised coal pillar mining.
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The concept of a thick seam varies from country to country, the basis for the lower limit of a thick seam being the thickness up to which a seam could be extracted in one lift (pass) with the available equipment and technology . In India, over 60% of coal reserves are thick seams, and a considerable % of coking coal belongs to thick seams.
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In this paper, the authors seek to quantify the impacts of mining of the super-thick coal seam on local environment in the Eastern Junggar coalfield, one of the …
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The coal seam mined at the S1201 mining panel is the Jurassic Middle Yan'an Formation coal seam, with a thickness of 3.95–4.45 m and a designed mining height of 4.17 m, which belongs to the category of thick coal seam. The coal seam has a dip angle of 0°–2° and a burial depth of 80–160 m. The width of the test mining panel is …
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Although the future of coal mining lies belowground, the present status of Indian underground (UG) mining and, in particular, thick seam mining is not inspiring. Thick seams share about 40% of the proven Indian coal reserves. However, several consistent efforts were...
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DOI: 10.1016/j.jappgeo.2022.104774 Corpus ID: 251364709; Comprehensive research on the failure evolution of the floor in upper mining of deep and thick coal seam @article{Liu2022ComprehensiveRO, title={Comprehensive research on the failure evolution of the floor in upper mining of deep and thick coal seam}, author={Chang Liu and …
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Thick coal seam is the main coal seam to achieve high efficiency coal mining. In this chapter, the common mining methods for thick coal seams are introduced. There is a large-cutting-height mining method and a top-coal caving mining method. Also, the ground control for the thick coal seam mining is described in this chapter.
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In the thick of wanbei mining area coal seam fully mechanized hydraulic support adaptive study. Etc Wang; Journal of determining the rational supporting intensity, coal mining. Hao Cunyi Duan;
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The mining-induced failure of the coal seam floor is essential for water inrush. The mining disturbance to the floor, especially in the thick coal seam, is severe, and the water inrush risk is also higher than that in regular thick coal seam excavation. The superposition of many stresses, including in situ stress, mining-induced stress, and …
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The no. 3–5 extra-thick coal seam is mainly mined in the Tashan coal mine of the Datong mining area; the coal seam thickness ranges from 14 to 20 m and the burial depth ranges from 400 to 800 m. The overlying rock comprises multiple hard roofs with compressive strengths of 60–120 MPa.
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The state-of-the-art technology of the continuous miner (CM) deployment is a unique method to extract coal seam lying at greater depth with higher seam …
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Ultra-thick seams in this article refer to those equal to or greater than 6-m (20-ft) thick, but the majority are seams that are 7-m (23-ft) thick. For seams that are this thick, there are two major mining methods; one is top coal caving that was first adopted in the 1980s, while the other is the ultra-thick whole seam one-slice longwall mining ...
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Detecting the development height of the water-flowing fractured zone in the overburden of coal seam is of great significance for the overburden safety of working face with developed sandstone and thick loose layer. In this paper, the dual-mode parallel electrical method was used for dynamic monitoring of overlying rock in shallow and large …
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In this study, we discuss the applicability of IUAMM-based fluidized mining technology to thick-seam coal recovery, and its potential impacts on geological …
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Multiple seams: Coal mining's future. ... Ultra-close scenarios are most likely to occur near where a thick seam splits, or where a rider coalbed is of mineable thickness. Columnization of the pillars is considered the standard design practice when ultra-close interactions are a concern. Ultra-close interactions are unlikely when the two …
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The thick coal seam reserves are abundant in China, accounting for 44% of the total reserves, of which extra-thick coal seams account for more than 50%, and the annual output of thick and extra-thick coal seams accounts for more than 45% of the total annual output (Wang 2013).As the main coal seam, the extra-thick coal seam has a …
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This study aimed to investigate the internal dislocation law of coal seam working face under coal pillars with different widths and evaluate the safety of using the combined mining of close-distance coal seams under different layer spacing. Based on elastic–plastic mechanics and mine pressure theory, theoretical calculation and …
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This paper reviews underground mining methods for total thickness of a thick coal seam in single lift (TTTCSSL). Review shows the required engineering for …
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This paper reviews underground mining methods for total thickness of a thick coal seam in single lift (TTTCSSL). Review shows …
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The Indian thick seam coal mining by underground methods evolved with tremendous growth in terms of production and technology and the 21st century witnessed mile stones. ... 2395-0072 3 Jhanjra Project, ECL R VI, 4.8m 4.5 4 Khottadih ug Project, ECL PVK 5 Incline, SCCL GDK 11 Incline, SCCL Santhikhani, SCCL R VI,4.8m 4 King Seam ...
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Ultra-thick steep coal seam mining will inevitably lead to the increase of greater and violent ground subsidence and deformation. A subsidence control method by inversely-inclined slicing and upward mining is proposed in this paper. By this method, the sequence of collapse of overlying strata and the direction of propagation of strata …
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The major candidates of MPT in underground coal mining are longwall, high wall, and continuous miner. However, these methods are mostly applicable to medium …
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Along with it, a prospect of thick seam mining by mechanized longwall and its variants like Longwall Top Coal Caving (LTCC), Sub-Level Caving, etc. is proposed as a future thick seam mining method ...
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characteristics in deep thick loose seam and thick coal seam mining, Geomatics, Natural Hazards and Risk, 11:1, 632-653, DOI: 10.1080/19475705.2020.1737584 To link to this article: https://doi ...
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Appropriate measures are necessary to adopt to prevent disasters after mining to a length of 58.1 m, followed by every 15.0m of mining. KEYWORDS similar materials, orthogonal experiment, coal seam mining, physical experiment, thick coal seam 1 Introduction Coal mining often induces fractures in the overlying strata, and continuous
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Thick coal seam is the main coal seam to achieve high efficiency coal mining. In this chapter, the common mining methods for thick coal seams are …
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thick seam mining, this problem becomes very high. Further heavy coal loss takes place in bord and pillar mining. Therefore, longwall mining (with multi slicing) is the preferred method of mining for extraction of coal from thick seams. This is also suitable for mining thick as well as steep seams. However, BG
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The thick coal seam mining method prediction model based on artificial neural network (TCSMMPM-ANN) was established through the analysis of thick coal seam mining by using Levenberg – Marquardt (L-M) improved algorithm to train network, the simulation results of network test show that this model can provide a new research idea …
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