煤岩动力系统区域尺度计算方法在冲击地压危险性评价中的应用

Application of Regional Scale Calculation Method of Coal-Rock Dynamic System in Rock Burst Risk Assessment

某矿从2003年开始累计4次发生冲击地压,给矿井安全生产带来了严重影响。应用煤岩动力系统区域尺度计算方法对有震级记录的2次冲击地压进行了危险性评价。根据煤矿已发生冲击地压的震源位置和能量值,确定煤岩动力系统"动力核区""破坏区"和"损伤区"等各区域尺度的具体影响范围,判断不同尺度范围内煤岩体的冲击危险程度。计算结果表明,该矿冲击地压煤岩动力系统的动力核区尺度为5.51~9.31m,破坏区尺度为16.15~22.98m,损伤区尺度为97.87~165.32m,冲击显现范围与理论计算结果基本一致。表明该方法具有较高的可信度和实用性,可以广泛应用在矿井冲击地压的预测与危险性评价工作中。

Rockburst occurred four times in a mine since 2003,which had a serious impact on mine safety.The regional scale calculation method of coal-rock dynamic system was applied to evaluate the risk of two rock bursts with magnitude records.According to the source position and energy value of happened rockburst,the concrete scale range of dynamic nuclear area zone,damage zone,injury zone and influence zone are calculated,so that the different rockburst danger degrees in different areas of coal-rock mass could be determined.The calculation results show that the dynamic nuclear area zone of the rockburst dynamic system is 5.51-9.31 m,the damage zone scale is 16.15-22.98 m,and the injury zone scale is 97.87-165.32 m.The impact behavior range is basically consistent with the theoretical calculation results.The results show that the calculation method is highly reliable and practical,which could be widely used in forecasting the risk of rockburst.