摘要
为了研究薄煤层7301综采工作面矿压显现规律,通过在超前工作面30m和60m打两组钻孔监测支承压力分布规律,采用“十字布点”法布置3点监测巷道围岩变形量。根据监测结果可知,工作面超前支承压力影响范围25m左右,侧向支承压力在煤壁深4m左右位置达到峰值。原有的锚网索和注浆加固支护方式能够有效减小围岩变形,保证巷道稳定。
In order to study the ground pressure behavior law of 7301 fully mechanized mining face in thin coal seam,the distribution of abutment pressure was monitored by drilling two groups of boreholes 30m and 60m ahead of the working face,the method of“cross point distribution”is used to set three points to monitor the deformation of surrounding rock of roadway.According to the monitoring results,the influence range of advance abutment pressure of working face is about 25m,the lateral abutment pressure reaches the peak value at the depth of 4m.The original bolt mesh cable and grouting reinforcement can effectively reduce the surrounding rock deformation,ensure the stability of roadway.
出处
《中国矿山工程》
2020年第4期36-38,41,共4页
China Mine Engineering
关键词
薄煤层
矿压显现
支承压力
支护
thin seam
strata behaviors
abutment pressure
support
