基于基本顶悬顶长度的窄煤柱合理宽度确定

发布时间：2018-03-16 00:36

本文选题：沿空掘巷　切入点：窄煤柱　出处：《煤炭工程》2017年02期 　论文类型：期刊论文

【摘要】：针对基本顶悬顶长度对窄煤柱稳定性的不利影响,采用理论分析与数值模拟相结合的方法,研究了沿空巷道的开挖位置以及护巷窄煤柱的合理宽度。结果表明:基本顶悬顶长度会直接影响到沿空掘巷围岩的稳定性,为使基本顶断裂线位于煤壁内侧,提高围岩的稳定性及煤柱的支承能力,确定合理的护巷煤柱宽度为5m。现场工业性试验表明,研究成果对沿空巷道位置的选取、窄煤柱合理宽度的确定是科学合理的,同时也为该矿取得了良好的技术经济效益。
[Abstract]:In view of the adverse effect of the basic roof suspension length on the stability of narrow coal pillar, the method of combining theoretical analysis with numerical simulation is adopted. The excavation position of roadway along goaf and the reasonable width of narrow coal pillar in protecting roadway are studied. The results show that the length of basic roof suspended roof will directly affect the stability of surrounding rock of roadway along goaf, in order to make the basic top fracture line located inside the coal wall, In order to improve the stability of surrounding rock and the bearing capacity of coal pillar, the reasonable width of coal pillar in roadway protection is determined to be 5 m. The field industrial test shows that the determination of reasonable width of narrow pillar is scientific and reasonable for the selection of roadway position along the goaf. At the same time, good technical and economic benefits have been obtained for the mine.
【作者单位】：安徽理工大学能源与安全学院;煤矿安全高效开采省部共建教育部重点实验室;
【基金】：国家自然科学基金委员会与神华集团有限公司联合资助项目(51174255) 国家自然科学基金项目(51274008)
【分类号】：TD822.3

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