含水量对煤岩电阻率特征的影响  

Effect of moisture content on resistivity of coal or rock

作　　者：许昭勇 宋大钊[1,2] 王恩元[1,3] 邱黎明[1] 

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]永城煤电集团有限责任公司技术与信息中心,河南永城476600 [3]煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116

出　　处：《工矿自动化》2015年第8期72-76,共5页Journal Of Mine Automation

基　　金：国家自然科学基金资助项目(51304205);教育部科学技术研究项目(113031A);中国博士后科学基金项目(2013M541982;2014T70678)

摘　　要：通过建立的受载煤体电阻率实时监测系统,测试研究了自然原煤试样及不同含水量原煤试样在单轴压缩破坏过程中电阻率实时变化特征规律,并分析了该过程孔隙率对电阻率的影响。测试结果表明,自然原煤试样在破裂破坏产生大尺度裂纹时电阻率急剧增加,含水原煤试样在破裂破坏时电阻率虽然也有增加,但相比于自然原煤试样更平缓;含水原煤试样的孔隙率对破坏过程中电阻率的变化有显著影响,在含水原煤试样剧烈破坏前电阻率变化与孔隙率变化基本呈负相关关系。By establishing real-time monitoring system of resistivity variation regularities of loaded coal, real-time resistivity variation law of natural raw coal samples and raw coal samples with different moisture content in uniaxial compressive failure process was tested and studied, and the effect of porosity of the process on the resistivity was analyzed. The testing results show that resistivity of natural raw coal samples increases dramatically when a large-scale destruction of rupture crack, although resistivity of raw coal samples with different moisture content also increases during burst damage, but compares to the natural raw coal samples is more gentle; porosity of raw coal samples with moisture content has a significant impact on resistivity change in damage process, resistivity and porosity change of raw coal samples with moisture content is negative linear correlation before severe damage.

关 键 词：煤岩动力灾害 电阻率 煤体含水量 孔隙率 单轴压缩破坏 

分 类 号：TD315[矿业工程—矿井建设]