深埋巷道过高水压断层控制对策研究  

Research on control measures of deep-buried roadway passing through fault with high water pressure

作　　者：张小兵 潘夏辉 ZHANG Xiaobing;PAN Xiahui(China Energy Investment Group Corporation Ltd.,Beijing 100011,China;School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]国家能源投资集团有限责任公司中国神华计划发展部,北京100011 [2]河南理工大学土木工程学院,河南焦作454003

出　　处：《煤矿安全》2021年第12期97-105,共9页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(41807209)。

摘　　要：当深埋巷道遭遇高水压断层时,为确定其合理的控制对策,以邢东煤矿一运输巷为背景,考虑岩石破坏后的强度下降与渗透率突变问题,对高水压断层附近深埋巷道围岩位移、塑性区、渗透系数以及涌水量变化规律展开数值模拟研究;提出了"超前预注浆+锚网梁+锚索+工字钢棚+喷浆"联合支护控制对策。结果表明:当深埋巷道掘进面距高水压断层小于21 m,随着巷道的向前掘进,无支护条件下巷道顶底板、两帮以及掘进面位移、塑性区以及涌水量将呈指数式增大,巷道顶板以及左帮是巷道围岩首先发生失稳及突水的部位;采用"超前预注浆+锚网梁+锚索+工字钢棚+喷浆"联合支护后,高水压断层附近巷道围岩的收敛位移、塑性区深度以及涌水量将分别被控制在110 mm、3.2 m以及16 m^(3)/h以内,可以有效降低突水灾害发生的概率。In order to determine the reasonable control countermeasures when a deep-buried roadway encounters a fault with high-water pressure,a transport roadway in Xingdong Coal Mine was taken as an example,and the strength drop and permeability mutation of rocks after failure were considered.The numerical simulation results of the displacement,plastic zone,and permeability coefficient and water inflow of the roadway surrounding rocks were carried out.A combined support control measure of“advance pre-grouting+anchor mesh beam+anchor cable+I-steel shed+shotcrete”was proposed.The research results show that when the advancing face of deep-buried roadway is less than 21 m from the high-pressure fault,as the roadway advances,the displacement,plastic zone and water inflow of the roadway surrounding rocks without support will be exponentially increase.The roof and left side of the deep-buried roadway is the place where the surrounding rock loses stability and water inrush occurs at first.After adopting“advance pre-grouting+anchor mesh beam+anchor cable+I-steel shed+shotcrete”combined support,the convergent displacement,plastic zone depth and water inflow of the roadway near the high-pressure fault will be controlled within 110 mm,3.2 m and 16 m^(3)/h respectively,which can effectively reduce the probability of water inrush disaster.

关 键 词：深埋巷道 高水压断层 位移 塑性区 涌水量 控制对策 

分 类 号：TD745.2[矿业工程—矿井通风与安全]