为解决宽沟煤矿西翼I010203工作面进风巷受到下方采空区侧向应力影响造成的应力集中现象，采用现场煤体应力计监测数据对比分析和数据无量纲化处理相结合的手段，分别对进风巷上帮围岩应力和煤柱侧围岩应力分布情况进行了研究，研究结果表明：进风巷上帮煤体应力分布与巷道下帮侧煤体应力分布不同，巷道上帮侧煤体应力浅部应力高于深部应力且与至工作面距离正相关，孔深4.5 m煤体应力集中程度最高，采动应力集中分布在超前工作面50～110.6 m，显著影响范围为超前工作面50 m内；巷道下帮侧煤体应力深部高于浅部且与至工作面距离正相关，煤体应力集中位于9 m以上的深部位置，采动应力集中分布在超前工作面50～80 m，显著影响范围为超前工作面60 m内；确定了进风巷上帮煤体预卸压范围为50～120 m，巷道下帮煤体的预卸压范围为60～80 m。参考经验数据以及理论计算，确定了进风巷上帮煤体爆破卸压工程和下帮煤体大直钻孔卸压工程的相关参数，结合PASAT探测和围岩应力数据对比分析结果，设计的煤体爆破卸压工程能有效降低区段煤柱围岩应力集中现象，但大直径钻孔应确保一定的工程量，形成连续卸压面才能达到预期卸压效果。

In order to solve the stress concentration caused by the lateral stress of the gob below the air inlet roadway in the West Wing I010203 face of Kuangou Coal Mine, a comparative analysis of on-site coal stress gauge monitoring data and non-dimensional data processing were adopted. The combined methods were used to study the stress distribution of surrounding rock on the side roadway with reserved coal pillars along the gob. Research results show that: The stress distribution of the upper side of the roadway in the air inlet roadway along the gob is different from that of the lower side of the roadway. The stress in the shallow part of the upper side of the roadway is positively correlated with the working face distance, the coal body stress concentration is the highest at the hole depth of 4.5 m. The stress concentration is distributed in the range of 50～110.6 m in the advanced working face，and the significant influence range is within 50 m ahead of the working face; the deep part of the coal body on the lower side of the roadway is higher than the shallow part and is positively correlated with the distance of the working face, and the coal body stress concentration is located at 9 m, and the mining stress concentration is in the range of 50～80 m in the advance working face, and the significant influence range is within 60 m ahead of the working face; the pre-pressure relief range of upper side in the air inlet roadway along the gob is 50～120 m, and that of lower side is 60～80 m. With reference to empirical data and theoretical calculations, the relevant parameters of the upper coal body blasting pressure relief project and the lower coal body large straight borehole pressure relief project of the air inlet side roadway along the goaf are determined, combined with PASAT detection and surrounding rock stress data. Comparative analysis results show the designed coal body blasting pressure relief project can effectively reduce the stress concentration of surrounding rock of the reserved coal pillar, but the large diameter pressure relief borehole should ensure a certain amount of work and form a continuous pressure relief surface to achieve the expected pressure relief effect. 

0 引言

1 工程概况

   1.1 矿井概况

   1.2 煤岩层冲击倾向性

2 应力分布范围

   2.1 回风巷上帮应力分布

   2.2 区段煤柱应力分布

3 区段煤柱卸压工程

   3.1 煤体爆破卸压工程

   3.2 煤柱侧大直径钻孔卸压工程

4 区段煤柱工程效果验证

   4.1 煤体爆破工程效果验证

   4.2 大直径钻孔卸压工程验证

5 结论