地堑构造区综放工作面开采诱冲机理及防治技术

Research on induced mechanism and prevention technology of rock burst in fully mechanized top coal caving face in graben structural area

针对地堑构造区开采冲击地压防治难题,以义桥煤矿3307工作面为工程背景,在分析工作面地质资料和工程条件的基础上,应用FLAC^(3D)数值模拟软件,构建了地堑构造区三维数计算模型,模拟研究了地堑构造区工作面开采应力场分布及断层活化规律,揭示了地堑构造区综放工作面开采诱冲机理。在此基础上,提出了工作面超前危险区预测+大直径钻孔强卸压+多源信息监测预警于一体的冲击地压综合防治技术,并进行了现场应用。监测结果表明,该技术体系可以有效预防与消除工作面冲击地压危险,确保工作面安全高效开采。

In view of the difficult problem of prevention and control of rock burst during mining in graben structural area,taking 3307 working face of Yiqiao Coal Mine as the engineering background,based on the analysis of geological data and engineering conditions of the working face,a three-dimensional numerical calculation model for constructing graben structural area was established by using FLAC^(3D) numerical simulation software,and the distribution of mining stress field and fault activation law of working face in graben structural area were simulated and studied,the mining induced mechanism of rock burst in fully mechanized top coal caving face in graben structural area was revealed.On this basis,the comprehensive prevention and control technology for rock burst,which integrated the prediction of advanced dangerous area of working face,strong pressure relief of large-diameter borehole and multi-source information monitoring and early warning,was proposed and applied in the field.The monitoring results showed that the technical system could effectively prevent and eliminate the risk of rock burst in the working face and ensure the safe and efficient mining of the working face.