论文部分内容阅读
针对补连塔煤矿22308工作面初采阶段相邻22307采空区CO浓度异常,对22307采空区采取注液态CO_2、注氮和注浆等综合防灭火措施后,无明显效果。经地表裂隙排查,发现22308工作面对应地表采坑存在冒烟明火区域,利用SF6气体示踪技术测定地表采坑、12煤采空区与22307采空区存在漏风通道。通过对地表采坑进行剥挖并用黄土覆盖压实处理,22307采空区CO浓度急剧下降,证实了采坑内煤矸石自燃是导致22307采空区CO浓度异常的根本原因。
In view of the abnormal concentration of CO in the adjacent 22307 goaf in the initial stage of 22308 working face of BuLinta coal mine, no significant effect was found after 22207 goaf was filled with liquid CO_2, nitrogen injection and grouting. According to the investigation of surface fissures, it is found that there is a smoke and fire zone in the 22308 face corresponding to the surface excavation. SF6 gas tracing technique is used to measure the surface excavation. There are air leakage channels in the 12 coal gob and 22307 gob. By stripping the surface excavation and loess compaction, the concentration of CO in 22307 goaf declines sharply, which proves that spontaneous combustion of coal gangue is the root cause of abnormal CO concentration in 22307 goaf.