切顶卸压工作面底板采动破坏实测研究  

Practical Study of Mining Failure of Working Face Floor with Roof Cutting Pressure Relief

作　　者：许延春[1,2] 罗亚麒 张书军[3] 张罗迅 郭文砚 范明宇 XU Yan-chun;LUO Ya-qi;ZHANG Shu-jun;ZHANG Luo-xun;GUO Wen-yan;FAN Ming-yu(Resource and Safety Engineering School, China University of Mine Technology (Beijing), Beijing 100083, China;National Engineering Technology Research Center of Coal Mine Water Disaster Prevention, Beijing 100083, China;Jiulishan Coal Mine, Henan Jiaomei Energy Co. , Ltd. , Jiaozuo 454173, China)

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]国家煤矿水害防治工程技术研究中心,北京100083 [3]河南焦煤能源有限公司九里山矿,河南焦作454173

出　　处：《煤矿开采》2018年第6期94-98,共5页Coal Mining Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2013CB227903);国家自然科学基金项目(51504095)

摘　　要：为了研究采用预裂爆破进行切顶卸压对工作面底板破坏深度的影响,在九里山矿14141工作面采用特制电极电缆进行了底板钻孔直流电法测量,通过分析工作面在回采过程中底板岩体视电阻率的变化特征,结合观测时工作面与测点的空间位置关系,得出采动影响下的底板破坏深度,并将其与未考虑切顶卸压影响的统计公式值及理论公式值进行对比分析。结果表明:14141工作面底板最大破坏深度为9. 8m,相比未考虑切顶卸压情况下的计算值均有所减小,平均减幅为15. 1%,说明切顶卸压能够有效减小底板破坏深度,有利于带压开采工作面的安全回采。In order to influence that roof cutting pressure relief with presplitting blasting to floor failure depth of working face, and then floor boring direct current electric method with special electrode and cable was proceed in 14141 working face of Jiulishan coal mine, according apparent resistivity variation of floor during mining, with spatial position between working face and testing points, and then floor failure depth under mining influence was obtained, also compared with the value of statistics formula and theory formula, which obtained without roof cutting pressure relief. The results showed that the largest failure depth was 9.8m of 14141 working face, it's value smaller than without roof relief, average damping was about 15.1%, so floor failure depth could be decreased effectively by roof cutting pressure relief, and benefit for safety mining.

关 键 词：切顶卸压 预裂爆破 直流电法 带压开采 水害防治 

分 类 号：TD745[矿业工程—矿井通风与安全]