断层活化及防水煤柱留设数值模拟研究  

Numerical Simulation Study on Fault Activation and Waterproof Coal Pillar Setting

作　　者：王利 王忠雪 李瑶 Wang Li;Wang Zhongxue;Li Yao(Shandong Jining Yunhe Coal Mine Co.,Ltd.,Shandong Jining 272055;School of Resources,Shandong University of Science and Technology,Shandong Tai'an 271019)

机构地区：[1]山东济宁运河煤矿有限责任公司,山东济宁272055 [2]山东科技大学资源学院,山东泰安271019

出　　处：《山东煤炭科技》2023年第10期104-107,112,共5页Shandong Coal Science and Technology

摘　　要：为解决阳城煤矿1311工作面FD121断层活化造成工作面突水的问题,利用FLAC~(3D)模拟分析留设不同宽度煤柱及使用“只采不放”方法,对工作面回采过程中覆岩应力场、断层滑移、塑性破坏特性以及断层活化特性等展开研究。结果表明:防水煤柱宽度越小,工作面正应力、剪应力和最大主应力越大;断层面位移越大,上、下盘塑性区接触越大,突水概率越大。邻近FD121断层开采时,留设22 m煤柱是可靠的,而当只采不放时,“采”部分的煤柱可减小为16 m。In order to solve the problem of water inrush caused by the activation of the FD121 fault in the 13113D working face of Yangcheng Coal Mine,using FLAC to simulate and analyze the setting of coal pillars with different widths and the use of"only mining without caving"method,and conducting research on the stress field,fault slip,plastic failure characteristics,and fault activation characteristics of the overlying rock during the mining process of the working face.The results show that the smaller the width of the waterproof coal pillar,the greater the normal stress,shear stress,and maximum principal stress of the working face;The larger the displacement of the fault plane,the greater the contact between the plastic zones of the upper and lower walls,and the greater the probability of water inrush.When mining near the FD121 fault,setting a 22 m coal pillar is reliable,but when only mining without caving,the"mining"part of the coal pillar can be reduced to 16 m.

关 键 词：数值模拟 断层活化 应力场 塑性区 流固耦合 

分 类 号：TD822.3[矿业工程—煤矿开采]