淮南矿区保护层开采卸压范围及瓦斯抽采地面井部署

以保护层卸压开采和卸压瓦斯地面井抽采工程实践取得的大量资料为基础，结合采区上覆岩层变形变位检测和煤岩层力学性质实验室测试结果，总结了煤与煤层气开采地质条件，讨论了确定保护层开采有效卸压范围的方法，得到了淮南矿区保护层开采有效卸压范围的结果，分析了其对卸压瓦斯地面井部署的影响，提出了淮南矿区卸压瓦斯地面井部署的建议。研究结果表明:淮南矿区11-2保护层的最大有效保护距离为117 m，11-2保护层的开采对13-1被保护层的保护是有效的；走向有效卸压保护角为64°，倾向有效卸压保护角下方为77°、上方为83°，被保护层的卸压范围相对于保护层下部内错15.4 m，上部内错8.2 m；地面井应部署在走向上距始采线37 m外，倾向上靠近回风巷13～30 m之间的位置。研究结果对实现煤层气高效、持续、稳定的抽采和煤与煤层气共采意义重大。 

Protective seam mining released range and the site deployment of the released methane draining surface well in Huainan mine area

Based on data from protective seam mining and released methane surface drainage engineering practices, combined with the deformation and displacement detection of the overlying strata in mining area and the rock mechanical properties testing results of the coal seam in laboratory, the paper summarizes the geology conditions of mining coal and coal bed methane, discusses the method of determining the efficient released ranges and obtains the results of the ranges, analyzes the released ranges' influence on the released methane surface well site deployment and presents suggestion about that.The findings indicate that 11-2 coal's maximum protective distance is 177 m in Huainan mine area, the released angle along the strike is 64°, along the dip the angle in inferior part is 77°, in superior part is 83°, relative to 11-2 coal, the released range of 13-1 coal along the dip retracts inwards 15.4 m in inferior part, in superior part retracts inwards 8.2 m, the surface well should be deployed at 37 m far from start-mining line along the strike and close to return airway about 13~30 m along the dip.The findings are significant for realizing coal bed methane drainage efficiently, stably, continuously and simultaneously extracting coal and coal bed methane.