低透气性煤层钻孔瓦斯运移及抽放参数研究

Research on Gas Migration and Drainage Rule of Borehole and in Low Air Permeability Coal Seam

运用瓦斯流动理论和岩土力学相关理论,研究深部煤层受采动影响后渗透特性变化情况及规律。依据淮南矿区某矿井地质情况,通过现场实测瓦斯基础参数,建立数学模型、实验室数值模拟等手段,综合分析钻孔瓦斯流量衰减规律,确定了研究矿井煤层钻孔有效影响半径和合理抽放时间,为实现煤与瓦斯安全高效共采提供了依据。

Permeability characteristics and rules changes about the mining of deep coal seam are researched and all of them are based on theory of gas flow and rock and soil mechanics.Researches of coal seam about effective influence radius of borehole are identified and gas flow attention laws of borehole are analyzed integrated,using mine geology,basic parameters of the gas field measurement,mathematical model,numerical simulation in laboratory and so on.All of these provide the basis for realization of safe and highefficient exploitation of coal and gas.