大气压变化对采空区瓦斯涌出影响的实验研究  

Experimental investigation on influence of atmospheric pressure change on gas emission in goaf

作　　者：盛继权 金毅 姜卓 朱云飞 SHENG Jiquan;JIN Yi;JIANG Zhuo;ZHU Yunfei(Laohutai Coal Mine,Fushun Mining Group Co.,Ltd.,Fushun 113003,China;Fushun No.10 Middle School,Fushun 113004,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]抚顺矿业集团有限责任公司老虎台矿,辽宁抚顺113003 [2]抚顺市第十中学,辽宁抚顺113004 [3]中国矿业大学安全工程学院,江苏徐州221116

出　　处：《中国矿业》2020年第11期172-177,共6页China Mining Magazine

基　　金：国家重点研发计划资助(编号:2016YFC0801800)。

摘　　要：为阐明地表大气压变化时期瓦斯异常涌出的作用机理,实验研究了地表、采煤工作面、采空区中气体静压的相对变化关系,探究了大气压波动时采空区瓦斯浓度的演化规律,评价了老虎台矿现有防治技术体系。研究发现,地表大气压与工作面空气静压同步变化,但采空区深部气体静压变化相较前两者具有明显的滞后性,该滞后性导致的采空区内外气压差是推动内部瓦斯涌出的直接原因。关于采空区瓦斯浓度,工作面气压与采空区瓦斯浓度变化趋势的反向特性和变化速率的一致性,决定了大气压快速持续降低时段必然是采空区瓦斯大量涌向工作面的危险时期。老虎台矿大气压监测预警、加强采空区瓦斯抽放、增大工作面风量的“三位一体”防治技术体系可有效控制大气压快速持续降低导致的采空区瓦斯异常涌出。For figuring out the mechanism of the influence of atmospheric pressure on gas emission,the static pressure's relations on surface,in coal face and goaf are experimentally studied,the change of gas concentration in goaf during atmospheric pressure fluctuation is explored,and the prevention and control system of Laohutai coal mine is introduced.The static pressure in coal face changes synchronously with the atmospheric pressure,but the change in the goaf has obvious hysteresis.The air pressure difference in the goaf caused by the hysteresis is the direct cause of gas emission.Regarding the gas concentration in goaf,when the statistic pressure decreases in the coal face,the gas concentration in goaf increases,presenting a significantly negative correlation.The prevention and control system of Laohutai coal mine consists of monitoring the atmospheric pressure,enhancing the gas drainage in goaf,and increasing the air volume.This system can effectively control the abnormal gas emission caused by the rapid and continuous reduction of atmospheric pressure.

关 键 词：煤矿安全 瓦斯涌出 采空区 大气压 调风 

分 类 号：TD712[矿业工程—矿井通风与安全]