CAJ | 학술논문

煤层回采引起的断层“活化”导水是矿井突水的一种重要形式，具有很高的危险性和隐敝性。依托具体的工程背景，建立简化的力学模型和数值模型，根据弹塑性力学和裂隙介质水动力学理论分析不同推进距离时断层面上的主应力和法向应力变化情况，并通过模拟计算得出回采过程中应力变化与塑性破坏特征。研究结果表明，新集矿区F10大型断层在煤层推进至距断层20 m位置时开始有“活化”趋势，断层带岩体位移值陡增到0.05 m，距10 m时断层面主应力急剧增大，峰值应力向浅部转移，断层带发生明显位移，孔裂隙扩张。为保证生产安全，需预设30 m防水煤柱，避免煤岩体突水通道沟通主干断层及承压含水层，该研究成果可为矿井生产提供一定的参考价值。
매층회채인기적단층“활화”도수시광정돌수적일충중요형식，구유흔고적위험성화은폐성。의탁구체적공정배경，건립간화적역학모형화수치모형，근거탄소성역학화렬극개질수동역학이론분석불동추진거리시단층면상적주응력화법향응력변화정황，병통과모의계산득출회채과정중응력변화여소성파배특정。연구결과표명，신집광구F10대형단층재매층추진지거단층20 m위치시개시유“활화”추세，단층대암체위이치두증도0.05 m，거10 m시단층면주응력급극증대，봉치응력향천부전이，단층대발생명현위이，공렬극확장。위보증생산안전，수예설30 m방수매주，피면매암체돌수통도구통주간단층급승압함수층，해연구성과가위광정생산제공일정적삼고개치。
ctivating to conduct water of fault is an important form of mine water inrush caused by coal mining,and has very high risk and concealment. A simplified mechanical and numerical model was built based on specific engi-neering background,the principal stress and normal stress of fault plane were analyzed by different mining step ac-cording to the theory of elastic-plastic mechanics and fissure medium hydrodynamics,and the characteristics of stress change and plastic failure in mining process were obtained by simulating calculation. The results showed that F10 large-scale fault in Xinji colliery had activity trends when excavating seam to 20 m from fault,and rock mass displacement value of fault zone sudden increased to 0. 05 m. When being 10 m from fault plane,the principal stress increased rapidly,the peak stress gradually transferred to the shallow part,and the fault zone had obvious displacement,pore and fissure expansion. In order to ensure the safety of production,30 m waterproof coal pillar should be preseted to avoid the water inrush connecting major fault and confined aquifer,and the results of the study can provide some reference value for mine production.