摘要
根据201工作面回采结束后密闭的日常观测结果,发现其采空区内气体风流方向经常发生变化,采空区气体呈现"膨胀—收缩"的"呼吸"现象,容易引起采空区遗煤自燃。通过采用释放SF6示踪气体检测技术,查明了201工作面与邻近工作面及地表裂隙间漏风状况,表明采空区"呼吸"现象的发生与地表大气压变化密切相关,并提出了针对性地防治技术措施。
The daily detection of closed No.201 face after the caving shows that ventilation direction often changes in the mined-out area.The breathing(inflation-contraction of the gas) phenomenon tends to cause the spontaneous combustion of left coal.Through SF6 tracing gas technique,the air-leakage between the No.201 face and the adjacency faces and between surface cracks are found out.The results show that the breathing is closely related to atmospheric pressure,and targeted prevention measures are presented.
出处
《山西煤炭》
2012年第8期47-48,51,共3页
Shanxi Coal
关键词
呼吸现象
SF6示踪气体
漏风测定
大气压
breathing
SF6 tracing gas
air-leakage determination
atmospheric pressure
