含瓦斯煤循环加载破坏表面电位实验研究

刘永杰; 陈鹏; 张立强; 李思瑶

doi:10.13272/j.issn.1671-251x.2015.09.008

含瓦斯煤循环加载破坏表面电位实验研究

华北科技学院安全培训部，河北燕效065201

基金项目:

中央高校基本科研业务费资助项目（3142015051，3142015001）

详细信息

中图分类号: TD713.1
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出版历程
- 刊出日期: 2015-09-09

Experimental research of surface potential of coal containing gas under cyclic loading

Security Training Department, North China Institute of Science and Technology, Yanjiao 065201, China

摘要

摘要: 为了研究循环加载条件下瓦斯对煤体破坏表面电位的影响，搭建了含瓦斯煤受载破坏表面电位实验系统，测试并分析了不同瓦斯压力条件下，煤体循环加载破坏产生表面电位信号的特征规律，探讨了有瓦斯参与情况下煤体受载破坏的机理。实验结果表明，煤体在有瓦斯的条件下受载破坏能够产生表面电位信号，且电位信号与应力和瓦斯的变化趋势具有一定的关联性；对于同一类型煤样，随着充入瓦斯压力的增加，电位信号最大时的应力水平逐渐减小；在循环加载过程中，当应力超过前一次加载应力最大值时，电位信号明显增大。
- 煤与瓦斯突出 /
- 含瓦斯煤 /
- 受载破坏 /
- 表面电位
Abstract: In order to research influence of gas on surface potential of coal containing gas under cyclic loading, an experimental system about surface potential of coal containing gas under cyclic loading was built. Characteristic laws of surface potential signals were tested and analyzed in coal destruction process by cyclic loading under different gas pressure, and mechanism of loaded destruction of coal containing gas was discussed. The experimental results show that coal containing gas can produce surface potential signal in loaded destruction process, and the surface potential signal has some relevance with stress and gas change. For the same type of coal samples, stress level under the maximum surface potential decreases as gas pressure increases. The surface potential signals obviously increases when stress is larger than the last maximum during cyclic loading.
- coal and gas outburst /
- coal containing gas /
- loaded destruction /
- surface potential