摘要
煤体中的瓦斯含量能显著影响煤的电阻率,本文利用高精度电阻测试实验装置,在连续吸附/解吸与等体积吸附/解吸条件下,对煤样的电阻率随瓦斯含量的变化规律进行测定。研究结果表明:煤样在连续吸附/解吸与等体积吸附/解吸条件下,电阻率随着瓦斯吸附量增大先逐渐减小,后趋于平稳;等体积吸附(静态吸附)时电阻率改变较连续吸附(动态吸附)明显,且等体积解吸结束时,煤体电阻率距离原始值较远;在瓦斯解吸过程中,煤体电阻率随煤中瓦斯含量增大呈线性减小。研究结果为利用煤体电阻率与瓦斯含量的线性关系预测矿井瓦斯含量提供了理论依据,对指导现场的瓦斯含量测量具有重要意义。
Gas content can significantly affect the resistivity of coal. In this work,the variation of the resistivity of coal with gas content was determined by using a high- precision resistance instrument under the conditions of continuous adsorption / desorption and equal- volume adsorption / desorption. The results show that in the above conditions,resistivity of coal samples drops gradually first with increasing gas adsorption amount and then tends to be stable. In the case of equal- volume adsorption（ static adsorption）,resistivity changes more obviously than continuous adsorption. As equal- volume adsorption ends,resistivity of coal is far from the original value. During the desorption process,the resistivity of coal decreases linearly with growing gas content in the coal. The research results provide a theoretical basis for the prediction of gas content in coal beds using the linear relationship of the resistivity and the gas content of coal,which is of great significance to guiding the measurement of the gas content on site.
出处
《地质与勘探》
CAS
CSCD
北大核心
2016年第5期918-923,共6页
Geology and Exploration
基金
国家自然科学基金(编号:21373146
51304142)
山西省研究生创新基金(编号:02100740)共同资助
关键词
电阻率
吸附
解吸
膨胀变形
收缩变形
resistivity
adsorption
desorption
swelling deformation
shrinkage deformation
