型煤渗透率对温度和平均有效应力敏感性分析

Sensitivity Analysis of Coal Permeability to Temperature and Average Effective Stresses

本文以贵州某矿1号煤层煤样为研究对象,利用自主研发的三轴渗透仪,进行了温度和平均有效应力条件下的三轴渗流实验,分别考察煤层渗透率对平均有效应力和温度敏感系数的变化规律。实验表明,相同的型煤煤样,其平均有效应力敏感系数和温度敏感系数的演化规律相似,但温度对型煤敏感系数演化的影响相对较小;且温度和平均有效应力敏感系数之间作用机理较为复杂,不存在严格的单调变化规律。

Taken the number one coal samples coming from Guizhou as experimental subjects, the paper makes the advantage of self-made tri-axis seep instrument to conduct a series of experiments on conditions that temperature and average effective stresses. It normalizes the influential factors to find out the chan- ging law and principles between coal mine rate of seep, average effective stresses and temperatures. Ex- perimental results show that for the same coal samples, the average effective stresses sensitive coefficient and evolution rules of temperature sensitive coefficient are similar, but the temperature for the evolution of sensitive coefficient is relatively small. Between the temperature and average effective stresses sensitive coefficient mechanism is more complicated, and there is no strict monotonous change rule.