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Height of the Fractured Zone in Coal Mining under Extra-Thick Coal Seam Geological Conditions
Advances in Civil Engineering, 2021 The height of the fractured zone caused by coal mining is extremely significant for safely mining under water, water conservation, and gas treatment. At present, the common prediction methods of overburden fractured zone height are only applicable to ...
Dequan Sun +4 more
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Failure properties of roadway with extra-thick coal seams and its control techniques
HeliyonThe dense conventional combined support hardly controls the overall subsidence of the roadway roof in extra-thick coal seam and affects the excavation efficiency, leading to the technical problem of mining proportion imbalance in the mine. In this study,
Yiming Zhao, Nong Zhang, Jian Wang
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Research on prediction of residual deformation in goaf of steeply inclined extra-thick coal seam. [PDF]
PLoS One, 2020 The residual deformation of a goaf is studied to improve the foundation stability assessment for metro lines passing through the subsidence area of steeply inclined extra-thick coal seams. The variable mining influence propagation angle is introduced to describe the special form of the rock movement.
Huang C, Li Q, Tian S.
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Field and simulation study of the rational coal pillar width in extra‐thick coal seams [PDF]
Energy Science & Engineering, 2020 The principles of mining pressure in extra‐thick coal seams are different from those of medium‐thick and thick coal seams. Field investigation, laboratory test, and simulation analysis methods were used to study the correlation between the gob‐side entry
Wenrui He, Fulian He, Yongqiang Zhao
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Energy Science & Engineering, 2022 Extra‐thick coal seams are widely distributed in the Datong mine area in China. The rapid stopping of mining and the support withdrawal technology for extra‐thick coal seams need to be developed urgently. The reasonable stopping top coal caving distance,
Shengrong Xie +9 more
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Top coal drawing law for an extra thick coal seam under the single round group drawing method. [PDF]
Sci RepAbstractTo solve the problems of poor top coal drawing, lagging collapse, and difficulty in parallel operation of mining and drawing in extra-thick coal seams, considering the 8222 working face of the Tashan Mine as the engineering background, we first investigate the basic problems of fully mechanized top coal drawing mining in extra-thick coal seams ...
Pan W, Zhao Z, Li X, Xu Y, Zhang K.
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Structural model of hard overburden shell in thick coal seam and its application [PDF]
Scientific ReportsTaking the mining of extra-thick coal seam of Carboniferous hard overburden in tongxin coal mine of datong mining area as the engineering background, the movement characteristics of hard overburden in fully-mechanized caving mining of 3–5 # extra-thick ...
Xing Fu +5 more
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Geomatics, Natural Hazards and Risk, 2023 AbstractCoal bursts caused by mining-induced seismicity occur in the working face in steeply inclined and extra thick coal seams (SIETCSs). This article presents a case study in SIETCS through discrete element simulation as well as field investigation.
Jinrong Cao, Linming Dou, Jiang He
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Investigation on the dynamic evolution and evaluation of floor microseismic responses during extra-thick coal seam mining. [PDF]
Sci RepAbstract The mining of extremely thick coal seams causes strong disturbances to the floor strata. When a strong aquifer exists beneath the coal seam and the effective aquiclude is weak, the risk of floor water inrush increases significantly.
Wang H +6 more
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Study on crack propagation law of overlying strata in the process of small coal pillar mining in inclined extra-thick coal seam [PDF]
Scientific ReportsAiming at the problem of unclear crack propagation law of overburden rock in the process of small coal pillar mining in inclined extra-thick coal seam, this paper takes the 11,002 working face of Tengda Coal Mine in Heze, Xinjiang as the background ...
Weidong Lu +5 more
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