复杂地质条件下井筒揭煤区域防突措施实施位置探讨

Discussing the Position of using area Prevention Outburst Measure at exposing seam by shaft on Complex Geology Conditions

井筒揭煤时,工作面由坚硬的岩层突然进入较松软的煤层,工作面前方的集中应力发生突变,从而容易发生突出。如果揭煤地点遇到复杂的地质条件,煤层受构造应力的影响,工作面更易发生突出危险。论文提出了既满足规程要求,又考虑构造影响的合理确定实施区域防突措施位置。研究表明:采取区域防突措施的位置要同时满足距离煤层顶板法向距离不小于7m,同时距离断层面法向距离也不小于7m。

At exposing outburst seam by shaft, the outburst accident would appear easily because the concentrated stress and the change from petrous rock to soft coal seam. While the complex geology conditons, the tectonic stress would act on coal seam, the coal and gas outburst accident would appear more easily. At the paper, the rational poisiton of using area prevention outburst measure is extracted. It is according to the laws and regulations , but also con- sider the effect of the fault. The conclusion showed that the positon of using measure at distance coal seam roof 7m and fault surface 7m.