不同抽采条件煤体瓦斯流量物理模拟试验

Physical Simulation Experiment of Gas Flow in Coal Body under Different Drainage Conditions

借助自主研发出口端负压的三轴渗流设备,以贵州玉舍1#煤层型煤试件为研究对象,开展了不同抽采条件下瓦斯流量物理模拟试验,试验得出在出口气压从大气压降低到负压过程中,煤体中瓦斯流量持续升高,负压对煤体中瓦斯流动起促进作用,各种温度条件下煤体中瓦斯流量随抽采管径增大而增加。

Based on the briquette specimens of No.1 seam of Yushe coal mine in Guizhou as study objects, it carries out physical simulation experiments of gas flow under different drainage conditions with independent triaxial seepage experiments when the outlet has a negative pressure.It shows that next conclusions. Gas flow of coal body continues to grow when the outlet pressure from the atmospheric pressure reduced to negative pressure. Negative pressure plays a promoting role with gas flow velocity in the coal body.Gas flow of coal body increases with the increase of pipe diameter under different temperature.