Figures of the Article
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Plane position of No. 30202 working face
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Structural characteristics of thick and hard strata-coal pillar
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Division of "W"-shaped fracture stages
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Mechanical model at initial fracture stage
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Mechanical model at secondary fracture stage
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Curves of superimposed stress of bearing capacity of coal pillar
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Mechanism of instability-induced scour of thick hard rock- coal pillar structure
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Stress evolution law of coal pillar in section
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Evolution characteristics of overlying stratum structure
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Microseismic monitoring projection of working face
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Statistics of microseismic energy-frequency tendency
Tables of the Article
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编号 岩性 厚度 编号 岩性 厚度 R15 风积砂 255.1 R7 泥岩 41.1 R14 复合砂岩组 120.5 R6 粗粒砂岩 61.6 R13 泥岩 14.1 R5 泥岩 2.1 R12 复合砂岩组 100.4 R4 2-2中煤 1.3 R11 泥岩 40.1 R3 细粒砂岩 11.8 R10 中粒砂岩 7.2 R2 泥岩 10.3 R9 泥岩 57.9 R1 细粒砂岩 11.9 R8 中粒砂岩 20.2 Coal 3-1煤 5.3 -
参数 孔深/间距/(m·m-1) 一轮 二轮 三轮 四轮 煤柱帮 10 ≤2 13 ≤2 13 ≤2 13 ≤1 生产帮 20 ≤2 20 ≤2 22 ≤2 35 ≤1