Feasibility Study on the Prediction of Coal Bump with Electrical Resistivity Method

WANG Yun-gang; Wang Enyuan; Li Zhonghui; Liu Xiaofei; Liu Zhentang

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Feasibility Study on the Prediction of Coal Bump with Electrical Resistivity Method

WANG Yun-gang 1 * #,Wang Enyuan 2,Li Zhonghui 2,Liu Xiaofei 2,Liu Zhentang 2

1.School of Mining and Safety Engineering, CUMT, Xuzhou, Jiangsu China

2.School of Mining and Safety Engineering, CUMT

*Correspondence author

#Submitted by

Subject:

Funding: National Natural Science Fund ，National “973” Project，National “The Fifteenth” Science Key Project （No.50427401，2005CB221505，2004BA803B0105）

Opened online: 5 April 2007

Accepted by: none

Citation: WANG Yun-gang,Wang Enyuan,Li Zhonghui.Feasibility Study on the Prediction of Coal Bump with Electrical Resistivity Method[OL]. [ 5 April 2007] http://en.paper.edu.cn/en_releasepaper/content/11993

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.

Keywords:冲击倾向性煤岩；电阻率；单轴压缩；可行性

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