平顶山矿区原生结构煤和构造煤孔渗实验对比

Contrast Study on Porosity and Permeability of Tectonically Deformed Coal and Indigenous Coal in Pingdingshan Mining Area,China

为了研究构造煤孔渗变化特性,利用平顶山矿区原生结构煤和构造煤,进行了不同围压、温度、湿度和煤体结构类型等条件下孔隙度及渗透率的实验测定,对煤层孔渗特性在不同条件下的变化趋势进行了分析.结果表明:围压、温度、湿度和煤体结构类型4种因素对煤的孔隙度和渗透率均有较大影响,当温度和围压同时作用时,围压的作用效果大于温度的作用效果.并用Origin软件对部分实验数据进行了数据拟合,得出原生结构煤和构造煤的渗透率-孔隙度函数关系.

Taking the simulation of indigenous coal and tectonically deformed coal in Pingdingshan coal district as the research object,porosity and permeability of different coal samples under different factors are determined in this paper.The variation trend of porosity and permeability under different factors is analyzed.The experimental results show that four factors analyzed have significant impact on both porosity and permeability of coal.The effect of confining pressure is greater than temperature when confining pressure and temperature work together.And part of experiment data are fitted by the Origin software,concluding with the function relationship of porosity and permeability of coal.