采场回采前冲击危险性动态评估方法研究  

DYNAMIC EVALUATION METHOD FOR ROCKBURST RISK BEFORE STOPPING

作　　者：姜福兴[1] 冯宇[1] 刘晔[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083

出　　处：《岩石力学与工程学报》2014年第10期2101-2106,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展计划(973)项目(2010CB226803);国家自然科学基金资助项目(51274022;51174016)

摘　　要：大量的现场观测表明,掘进期间应力异常的地段,回采期间也是冲击地压高发区。因此,提出通过采用微震、地音和应力监测系统对掘进期间的震动和应力动态信息进行监测,从而划定冲击危险区和危险程度的动态评估方法。利用掘进期间揭露的静态地质资料完善勘探资料,对回采工作面冲击危险性进行静态评价,进而构建动态与静态联合评价的方法。该评价方法结合掘进期间的动静态信息,克服传统静态评价方法因评价资料不完善而导致的评价结果不够准确的局限性,为采场回采前冲击危险区的治理提供更加准确的依据,具有较好的应用价值。A large number of field observations have shown that the areas of abnormal stress during roadway excavation are also the ones where rockburst frequently occurs during coal mining, Therefore, a method of dynamic evaluation adopting the microseismic, underground sound and stress monitoring systems to monitor the dynamic information such as the vibrations and the stress signals during roadway excavation is presented to define the risk zones of rockburst and the levels of danger. The static geological data revealed during roadway excavation are added to the exploration data for the static evaluation ofrockburst risk at working face. A combined method of evaluation with the dynamic and static data was established. With both the static and dynamic information from the excavation, the proposed evaluation method overcomes the limitation of traditional static evaluation and provides a more accurate basis for rockburst control before mining activities.

关 键 词：采矿工程 冲击地压 动态评估 静态评价 微震 地音 应力监测 

分 类 号：TD32[矿业工程—矿井建设]