井下直接法测定煤层瓦斯压力数值模拟
Safety in Coal Mines(2017)
Abstract
为了研究煤层原始瓦斯压力、煤层渗透率和钻孔暴露时间对测压的影响,以经典渗流力学为基础建立了测压过程中瓦斯在煤层中流动的数学模型;然后通过COMSOL Multiphysics软件对测压过程进行模拟.结果表明:在一定条件下,煤层原始瓦斯压力或者渗透率越大,压降漏斗范围越大,但瓦斯压力平衡时间并不会因此而增加;在一定条件下,钻孔暴露时间越长,压降漏斗范围越大,瓦斯压力平衡时间也越长.
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