综放开采过断层冲击地压危险分析及防治技术

发布时间：2018-09-03 07:00

【摘要】：为预防综放开采过断层发生冲击地压事故,以东滩煤矿14310(东)综放工作面为背景,运用微震监测、数值模拟和理论分析等方法,研究断层区域的冲击地压危险性。按照断层活动规律,将工作面冲击危险性分为断层冷冻、断层蓄能、断层活化、断层煤柱、断层错动、上盘能量释放、残余能量释放和断层稳定8个阶段。分析3个高危阶段的冲击地压机理,认为断层活化型冲击机理是开采诱发断层附近积聚的构造应力向煤壁转移;断层煤柱型冲击机理是断层切割顶板与下盘形成高应力煤柱;断层错动型冲击机理是断层长期活化"润滑"断面。结果表明,冲击危险性划分结果和冲击机理分析结果皆与现场实际考察情况大致相同。
[Abstract]:In order to prevent the impact ground pressure accident from the fault in fully mechanized caving mining, taking the 14310 (East) fully mechanized caving face of Dongtan Coal Mine as the background, using the methods of microseismic monitoring, numerical simulation and theoretical analysis, the risk of the impact ground pressure in the fault area is studied. According to the law of fault activity, the perils of working face impact are divided into eight stages: fault freezing, fault energy storage, fault activation, fault pillar, fault dislocation, upper disk energy release, residual energy release and fault stabilization. By analyzing the rock burst mechanism in three high risk stages, it is considered that the fault activation impact mechanism is the transfer of tectonic stress accumulated near the fault to the coal wall caused by mining, and the fault pillar impact mechanism is the formation of high stress coal pillar by cutting the roof and the footwall of the fault. Fault dislocation impact mechanism is long-term activation of fault "lubrication" section. The results show that the results of impact hazard classification and impact mechanism analysis are almost the same as those of field investigation.
【作者单位】：辽宁工程技术大学矿业学院;中国煤炭科工集团沈阳研究院有限公司;
【基金】：国家自然科学基金资助(51304110) 辽宁省高等学校优秀人才支持计划项目(LJQ2013039)
【分类号】：TD324

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