论文部分内容阅读
通过利用高精度电阻测试实验装置,对煤样在连续吸附/解吸与等体积吸附/解吸条件下的电阻值变化规律分别进行测定,以研究吸附/解吸瓦斯对煤体电阻率的影响。研究结果表明:吸附/解吸瓦斯对煤体电阻率具有明显的影响,且煤样在连续吸附/解吸与等体积吸附/解吸条件下呈现出相同的规律,即:在吸附瓦斯过程中,煤体电阻率随着瓦斯吸附量先逐渐减小,后趋于平稳;而在瓦斯解吸过程中,煤体电阻率与煤中瓦斯含量呈线性关系。不同吸附方式下,对比同一瓦斯含量对应的电阻率,可以发现等体积吸附实验电阻率改变较连续吸附实验明显,且等体积解吸结束时,煤体电阻率距离原始值较远。
Through the use of high-precision resistance test device, the change of resistance of coal sample under continuous adsorption / desorption and isothermal adsorption / desorption were measured to study the influence of adsorption / desorption gas on the resistivity of coal. The results show that the gas adsorption / desorption has obvious influence on the resistivity of coal, and the coal samples show the same regularity under the conditions of continuous adsorption / desorption and equal volume adsorption / desorption: in the process of gas adsorption, The resistivity decreases first and then tends to be stable with the gas adsorption capacity. In the gas desorption process, the resistivity of coal has a linear relationship with the gas content in coal. Compared with the resistivity corresponding to the same gas content under different adsorption modes, it can be found that the resistivity of isometric adsorption experiment is more obvious than the continuous adsorption experiment, and the resistivity of coal body is far away from the original value when the desorption is completed.