摘要
为提高冲击地压预测精度,有效预防冲击地压灾害,将地应力场反演技术用于冲击危险性评价,并以评价结果为依据指导现场冲击地压防治。研究结果表明:基于地应力实测及地应力场反演结果,回采面可以划定A、B、C 3个冲击危险区域,并计算得出其最大应力集中系数分别为1.56、1.44、1.78;综合考虑煤岩内在属性、应力环境、开采条件及地质条件等多个影响因素对A、B、C 3个区域进行冲击危险性评价,得到其冲击危险等级评定指数Wt均为0.76,为强冲击危险区域;通过分析冲击显现原因,针对危险区域采取多重解危措施,有效避免了冲击地压灾害的发生。
To improve the accuracy of rock burst prediction and prevent rock burst hazard of coal mine effectively,we used ground stress field inversion to carry out rock burst hazard assessment,and guided the prevention and control of rock burst on the basis of evaluation results. The results show that,firstly according to inversion results,three impact danger zones which are A,B and C are designated at working face,and their maximum stress concentration coefficients are respectively 1. 56,1. 44 and 1. 78; secondly,with considering multiple factors including inherent attributes of coal and rock,stress environment,mining conditions and geological conditions and so on,rock burst hazard of danger zones including A,B,and C was evaluated,and the result is that their risk rating index are all0. 76,therefore three danger zones are all strong rock burst danger zone; lastly,by the analysis of rock burst appeared multiple measures for danger zones were performed,and eventually rock-burst do not happen until the end of working face.
出处
《煤矿安全》
CAS
北大核心
2015年第11期43-45,49,共4页
Safety in Coal Mines
基金
国家自然科学基金青年科学基金资助项目(51304117
51404140)
国家科技重大专项资助项目(2011ZX05040)
关键词
冲击地压
地应力
地应力场反演
冲击危险性评价
冲击地压防治
rock burst
ground stress
ground stress field inversion
rock burst hazard assessment
rock burst prevention
