近距离关键层群同步破断机理研究
Research on Synchronous Breakage Mechanism of the Key Stratum Group With Nigh Distance
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摘要: 为研究浅埋深煤层开采时关键层群同步破断失稳机理，以王家塔煤矿为研究背景，结合矿山压力及岩层控制相关理论，运用数值模拟软件UDEC对煤层上覆岩层中存在单一关键层和2层关键层结构进行模拟，现场实测数据验证同步破断失稳理论。结果表明：当煤层上覆岩层中存在距离较近、岩性相近的2层关键层时，其服从关键层同步破断判据，可将其整体结构视为单一关键层结构进行稳定性分析，对矿压显现与岩层控制的影响也与单一关键层一致。Abstract: In order to study synchronous breakage instability mechanism of the key stratum group in the deep shallow buried coal seam mining, taking Wangjiata Coal Mine as research background, combined with the mining pressure and strata control related theory, numerical simulation software UDEC is used to simulate the situation of single key stratum and double key stratum structure in the overburden of coal seam. The measured data verified synchronization rupture instability theory. Results show that when there are double key stratum which is nigh distance and lithology similar in the overburden of coal seam, it obeys the key stratum of synchronous fracture criterion, its stability of whole structure can be regarded as a single key stratum structure analysis and the influence of rock pressure and strata control is consistent with a single key stratum.
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Keywords:
- key stratum /
- voussoir beam /
- synchronous breaking /
- UDEC simulation /
- instability mechanism
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[1] 范志忠, 于雷, 于海湧, 等. 近浅埋煤层大采高综采工作面覆岩活动规律[J].煤矿安全,2012,43(1):180-181. [2] 陈海栋, 程远平, 郭品坤. 浅埋深保护层开采下伏煤岩体裂隙分布规律[J].煤矿安全,2013,44(5):59. [3] 钱鸣高, 缪协兴. 采场矿山压力理论研究的新进展[J].矿山压力与顶板管理,1996（2）:17-18. [4] 钱鸣高, 张项立, 黎良杰. 砌体梁的“S-R”稳定及其应用[J].矿山压力与顶板管理,1994（3）:6-8. [5] 钱鸣高, 缪协兴, 何富连. 采场“砌体梁”结构的关键块分析[J].煤炭学报,1994,19(6):557-559. [6] 左建平, 赵洪宝, 张国彬. 关键层厚度对大断面巷道稳定性影响研究[J].中国煤炭,2013,39(2):45-46. [7] 吴洪胜, 董立军, 张国红, 等. 特厚煤层开采主亚关键层活动特征及其对覆岩移动的控制规律研究[J].中国煤炭,2012,38(4):44-46. [8] 钱鸣高, 石平五. 矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2003:84-85.
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