纳林河二号矿井31103-1工作面高度应力集中区钻孔卸压实践

Practice of Borehole Pressure Relief in High Stress Concentration Area of the 31103-1 Working Face of Nalinhe No.2 Mine

纳林河二号矿井31103-1残采块段前期属于孤岛工作面开采,后期属于沿空开采。根据该矿井以往工作经验判断,该矿井31103-1残采块段回采过程中面临冲击地压威胁。针对31103-1残采块段回采中的冲击地压威胁,该工作面采用了"浅孔~深孔"交替卸压施工作业方案。实践应用卸压效果理想,有效实现了残采块段卸压解危的目的。

The 31103-1 residual mining block of No.2 Mine of Nalinhe belongs to island working face mining in the early stage and gob side mining in the later stage. According to the previous work experience of the mine, the 31103-1 residual mining block is facing the threat of rock burst during the mining process. In view of the threat of rock burst in 31103-1 residual mining block, the "shallow hole-deep hole" alternative pressure relief construction scheme was adopted in the working face. In practice, the effect of pressure relief is ideal, which effectively realizes the purpose of pressure relief and danger relief of residual mining block.