【摘要】 煤层渗透特性是目前业内研究的热点和难点问题之一。通过对前人的研究方法和研究结果进行比较,着重对地应力、瓦斯压力和温度3个影响因素进行总结,并得到如下结论:煤样的渗透率变化与煤岩体内孔隙、裂隙的变化情况一致;瓦斯压力对煤样渗透率的影响存在有效应力主导阶段、煤基质吸附-解吸变形主导阶段和滑脱效应主导阶段;在较低的温度下,煤样渗透率随温度升高而降低;而较高温度下,随温度升高而升高。通过对上述影响因素研究现状的总结和思考,指出了今后亟待解决的科学问题和研究方向。更多还原

【Abstract】 Coal seam permeability is the one of the hotspots and difficult problems in the field of meathne flowing. Compared the previous research methods and results,we emphasize the stress,gas pressure and temperature and get the following conclusions: coal sample permeability is associated with the pores and changes of the fractures; the influence on coal samples caused by gas pressure exsits effective stress dominating stage,the matrix adsorption-desorption deformation dominating stage and Klinkenberg effect dominating stage; the permeability will decrease with the temperature increase at lower temperature but will be opposite at higher temperature.Through the summary and thinking about the above conclusions,we point out the scientific problems need to be solved and the trend of future development.更多还原