Feasibility Study on the Prediction of Coal Bump with Electrical Resistivity Method
The resistivity experiment of rock and its application were narrated in this paper. According to the method, the electrical resistivity method of predicting coal bump was brought forward. Experiments results are as follows: (1) the resistivity of horizontal stratification are smaller than that of vertical stratification, (2) the electrical resistivity values of coal sample under unsaturated state amount to about half of the nature state values, (3) the electrical resistivity changes of coal samples in the uniaxial compression show that coal samples electrical resistivity decreases with increasing uniaxial compression press, and begins to increase while reaching half of rupture press, and the electrical resistivity increase continuously if keeping on loading until rupture.Electric mechanism of loaded coal smaples and mechanics mechanism of coal bump were analyzed and gain the inherent relationship between the electrical resistivity changes and the fracture process of coal. The quadratic fitting stress-electrical resistivity function of under the uniaxial compression is more reasonable. Therefore, the method with electrical resistivity anomaly to predict the occurrence of coal bump is feasible.
coal bump prediction stress changes coal samples electrical resistivity feasibility
WANG Yun-gang WANG En-yuan LI Zhong-hui LIU Xiao-fei LIU Zhen-tang
School of Mining and Safety Engineering, CUMT, Xuzhou, Jiangsu 221008, China
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
696-701
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）