煤矿安全2017，Vol.48Issue(6)：5-8,4.DOI:10.13347/j.cnki.mkaq.2017.06.002
气体围压条件下煤体单轴压缩破坏的电位特征研究
Study on Electric Potential Characteristics of Coal Fracture Under Uniaxial Compression and Gas Confining Pressure
摘要
Abstract
In order to study the influential effect of gas environment on coal surface potential under the uniaxial loading condition,we build the coal uniaxial compression failure observation monitoring system under the nitrogen confining pressure,the surface potential of coal under different confining pressure was tested;the influence mechanism of coal loading and gas on the potential was discussed.The experimental results show that the coal in confining pressure loading can produce the surface potential signal,and the potential signal and the changes of stress and gas pressure have a certain relevance;for the same type of coal,with the increase of filling nitrogen pressure,the stress of coal structure changes.The fluctuation range of potential signal increases about 0.2 mV,the amplitude of the mutation is obvious,and the potential difference increases from 0 mV to 2 mV before the coal main rupture occurs.When the main fracture occurs,the potential signal increases obviously.关键词
煤体破坏/单轴压缩/电位特征/气体围压/监测/瓦斯影响Key words
coal damage/uniaxial compression/potential characteristic/gas confining pressure/monitor/gas influence分类
矿业与冶金引用本文复制引用
刘帅杰,李忠辉,钮月,殷山,孔艳慧,程富起,魏洋..气体围压条件下煤体单轴压缩破坏的电位特征研究[J].煤矿安全,2017,48(6):5-8,4.基金项目
“十三五”国家重点研发计划资助项目(2016YFC0801404) （2016YFC0801404）
国家自然科学基金资助项目(51674254) （51674254）
