中文摘要：

对察哈素矿31301工作面停采线附近采空区的气体变化规律进行了长时间观测,监测结果表明,由于未垮落空间大以及存在比较严重的漏风,停采线附近采空区内O_2浓度一直较高。针对存在的采空区漏风,采取了二次封闭、注浆、喷浆、均压、充填等措施,有效治理了采空区漏风,降低了采空区O_2浓度。

英文摘要：

Long-term observation was conducted for gas change laws of gob near stop line of 31301 working face at Chahasu Mine. The monitoring results showed that oxygen concentration kept high at gob near stop line because of large non-fallen space and serious air leakage. Secondary sealing, grouting, cementing, pressure balance and back-filling were utilized to solve air leak- age at gob and effectively lower oxygen concentration at gob.