三软煤层深部掘进工作面瓦斯抽放技术

Gas drainage technique used in heading face of three soft coal seam in deep mining area

介绍了焦家寨煤矿建立局部瓦斯抽放系统对521区皮带下山掘进工作面进行瓦斯抽放情况,采用边掘边抽抽放方法对该掘进工作面进行瓦斯治理,通过对掘进面的瓦斯治理,摸索出一套适合于焦家寨煤矿5#＂三软煤层＂赋存条件及开采条件的瓦斯治理技术,为今后矿井的瓦斯治理提供可靠的参数。

The establishment and operation of local gas drainage system in heading face of belt conveyor downhill tunnel at area 521 of Jiaojiazhai Coal Mine was described.Gas was drained off with the advance of excavation.Through gas drainage in the heading face, explored a set of control technique that was suitable to occurrence conditions and mining conditions of 5~# three soft coal seam in Jiaojiazhai Coal Mine,and provided reliable parameters for the future control of mine gas.