基于钻屑法的冲击地压危险性检测研究

Detection and study of rock burst hazard based on drilling cuttings method

为得出耿村煤矿13210回采工作面冲击地压危险性指标,对该工作面进行了钻屑法研究,研究发现根据现场测试的大量数据绘制的钻屑量曲线图可分为3种类型,分别为"孔底升高型"、"多峰型"、"单峰型",使用3种钻屑量曲线图,可以排除误差数据,确定有效数据。根据筛选的有效数据,得出当最大钻屑量为2.5～3.0kg/m,峰值位置距离煤壁距离为6～8m时有冲击地压危险性,但无严重冲击地压危险,对于今后冲击地压危险性的检测起到了重要作用。

In order to obtain rock burst hazard index of the Gengcun coal mine 13210 working face,the study of drilling cuttings was done on the working face and found that the drilling cuttings curve drawn based on a large number of data from the field tests can be divided into three types,'Hole bottom rise model','Multi-peak model' and 'Mono-peak model' respectively.The use of three types of drilling cuttings curve diagram can exclude the error data and determine the effective data.According to the effective data selection,it is concluded that there will be rock burst hazard,but not serious hazard when the maximum value of drilling cuttings weight is 2.5~3.0 kg/m and the distance is 6~8 m from peak position to coal wall,which plays an important role for detection of rock burst hazard in the future.