急倾斜特厚煤层水平分段冲击矿压防治技术研究

Study on rock-burst prevention with horizontal section top coal caving in steep-inclined and thick coal seam

为了揭示急倾斜特厚煤层水平分段开采冲击矿压的致灾原因,以窑街三矿5521-21工作面为对象,针对工作面的地质条件和采掘条件,基于冲击动力来源,分析发现动静载荷叠加效应是5521-21工作面发生冲击矿压的关键。以此提出了通过煤体卸压爆破、底煤卸压爆破、煤体大直径钻孔卸压和顶板深孔预裂爆破等防治措施,通过检验取得了良好的防治效果。

In order to reveal the mechanism of the rock burst with horizontal section top coal caving in the steeply inclined thick coal seam,the geological conditions and mining conditions of the mine are taken as the object of the 5521-21 working face of Yaojie No. 3 Mine. Based on the impulse power source,it is found that the superposition effect of static and dynamic load is the core of 5521-21 working face. The prevention and control measures of coal body pressure relief blasting,floor coal pressure relief blasting,coal body large diameter drilling pressure relief and roof deep hole pre-splitting blasting are carried out,and good results are obtained through inspection.