放顶煤开采无煤柱护巷矿压显现数值模拟研究
Several suggestions about sustaining development in coal industry
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摘要: 运用有限元法对放顶煤开采和分层开采无煤柱护巷和留小煤柱(3m)护巷的巷道变形进行了数值模拟和对比分析。Abstract: The problems existed in coal resource recovery rate are presented.The technical ways for decreasing coal damage are given.
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