大同矿区双系特厚煤层相互影响下安全高效开采技术

摘要

针对多煤层开采后当各煤层覆岩裂隙发育联通,采空区间积水、有害气体下泄等问题,以大同矿区双系煤层开采相互影响为工程背景,采用物理相似模拟、现场实测的研究手段确定了双系煤层开采覆岩裂隙联通,在分析确定了大同矿区双系煤层开采覆岩裂隙联通的基础上,针对双系联通带来的上覆采空区积水下泄、双系采空区漏风的技术难题,分别研究了多层采空区积水综合探测和立体排放水技术体系以及双系采空区流场动态平衡多点调控技术与装备,有效解决了上覆侏罗系煤层采空区积水威胁,避免了矿井自燃火灾与工作面有毒有害气体超限问题,保证了矿井的安全高效生产.%According to the cracking developed and connected in the overburden strata above each seam after the mining of the multi seams,accumulated water in the goaf area,harmful gas discharging and other problems,with the double system seam mining in Datong Mining Area as an engineering background,a study means with the physical similar simulation and the site measurement was applied to determine the cracking connection in the overburden strata above the double system seam mining in Datong Mining Area.Based on the analysis and determination of the cracking connection in the overburden strata above the double system seam mining in Datong Mining Area,according to the accumulated water discharging from the top goaf and the ventilation leakage problems caused by the double system connection zone,the accumulated water comprehensive detection and the 3D water discharging technical system of the multi seam goaf and the dynamic balance multi point control technology and equipment of the flow field in the double system goaf were innovated and studied.The accumulated water danger in the overburden Jurassic goaf were effectively solved,the mine spontaneous combustion disaster and the toxic gas and harmful gas overlimit problems of the coal mining face were eliminated and the safety and high efficient production of the mine were ensured.