论文部分内容阅读
厚表土层覆盖下的深埋不规则孤岛工作面覆岩空间结构复杂多变,顶板运动剧烈,该类孤岛工作面在受到大采深和地质构造等因素的影响下,极易发生冲击地压。以某矿不规则深井孤岛工作面为工程案例,首先对工作面冲击危险性进行分析评价,通过开采前进行的模拟推进,采用覆岩空间结构理论,分析得到了高应力区域,确定了冲击危险区域和危险程度;采用应力在线监测系统进行冲击危险性实时预报,钻屑法进行危险性检验;采取钻孔卸压和爆破卸压措施对危险区进行处理,有效的保证了复杂空间结构下孤岛工作面的安全回采。
Under the condition of thick overburden, the spatial structure of overburden strata in the deep irregular island work face is complex and changeable, and the top plate moves fiercely. Under the influence of deep mining and geological structure, such island work faces are prone to rock burst . Based on the case study of an irregular deep-well detached working face in a mine, the impact risk of the working face is analyzed and evaluated first. By using the simulation advance before mining, the theory of overlying rock spatial structure is adopted to analyze the high stress region and determine the impact risk Region and degree of danger; using on-line stress monitoring system to carry out real-time impact hazard prediction and drilling method to carry out risk testing; taking measures of borehole pressure relief and blasting pressure relief to deal with the danger zone, effectively ensuring that the isolated space under complex spatial structure Face safety mining.