邢东矿深部带压开采导水裂隙带微震监测及突水机制分析

发布时间：2018-03-20 16:37

本文选题：深部带压开采　切入点：突水通道　出处：《岩土力学》2017年08期 　论文类型：期刊论文

【摘要】：针对邢东矿2222工作面深部带压开采接近临界值且局部受隐伏断层等构造影响,可能出现底板突水的问题,采用ESG微震监测系统实时监测导水裂隙带形成过程,并利用研发的CMMA-3D微震分析系统获得了2222工作面底板导水裂隙带的空间位置,为针对性注浆治理和安全开采提供了重要指导。基于断裂力学分析了隐伏断层活化突水机制,推导出隐伏断层扩展长度计算公式。获得了不同类型隐伏断层(正断层和逆断层)的扩展规律:正断层扩展长度(35)l与承压水压力p和侧压系数?均呈正相关;逆断层扩展长度?l随承压水压力p的增加呈现出先减后增的变化趋势。底板导水裂隙带渗透性随采空区垮落岩体压实度的增加而降低,阐明了2222工作面突水量后期逐渐减小的原因。
[Abstract]:In view of the near critical value of deep zone pressure mining in 2222 working face of Xingdong Coal Mine and the local influence of hidden faults and other structures, water inrush on the floor may occur. The formation process of water-conducting fissure zone is monitored by ESG microseismic monitoring system in real time. The CMMA-3D microseismic analysis system is used to obtain the space position of the fissure zone in the floor of 2222 working face, which provides important guidance for grouting treatment and safe mining. Based on the fracture mechanics, the mechanism of active water inrush of hidden faults is analyzed. The formula for calculating the propagation length of concealed faults is derived. The propagation laws of different types of hidden faults (normal and reverse faults) are obtained: the length of normal fault propagation is 35ml, the pressure p of confined water and the coefficient of lateral pressure? The extension length of the reverse fault? L with the increase of confined water pressure p, the change trend is first decreasing and then increasing. The permeability of the bottom water conduction fissure zone decreases with the increase of compaction degree of rock mass in goaf, and the reasons for the gradual decrease of water inrush in 2222 face are explained.
【作者单位】：中国矿业大学(北京)力学与建筑工程学院;中国矿业大学煤炭资源与安全开采国家重点实验室;河北煤炭科学研究院;
【基金】：国家优秀青年科学基金(No.51622404) 国家自然科学基金(No.51374215,No.11572343) “十三五”国家重点研发计划(No.2016YFC0801404) “万人计划”青年拔尖人才联合资助项目~~
【分类号】：TD745.2

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