突水过程煤岩表面电位变化规律研究
发布时间：2019-02-22 19:50
【摘要】：通过突水的煤岩表面电位模拟试验系统测试了突水过程煤岩的表面电位,研究了突水过程中煤岩表面电位变化规律,得出结论:煤岩体表面电位对突水演化过程有显著的时空响应特征,能反映煤岩体内部破裂和裂缝扩展情况;突水演化过程可分为孕育期、裂缝扩展期和大规模突水期,孕育期内表面电位信号比较稳定,裂缝扩展期及大规模突水期内电位信号发生上下波动;不同位置表面电位信号水平一般不同,同一位置的信号水平与孔隙水压力及煤岩体破裂强度呈正相关关系。
[Abstract]:The surface potential of coal and rock during water inrush was measured by the simulation test system of coal and rock surface potential of water inrush, and the law of change of surface potential of coal and rock during water inrush was studied. It is concluded that the surface potential of coal and rock mass has significant spatiotemporal response to the evolution of water inrush and can reflect the internal fracture and fracture propagation of coal and rock mass. The evolution process of water inrush can be divided into three stages: inoculation period, crack spreading stage and large-scale water inrush stage, the surface potential signal is relatively stable during incubation period, and the potential signal fluctuates up and down during the crack spreading period and large-scale water inrush period. The level of surface potential signal at different positions is generally different, and the signal level of the same position is positively correlated with pore water pressure and the fracture strength of coal and rock mass.
【作者单位】： 中国矿业大学安全工程学院;中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室;中国矿业大学煤炭资源与安全开采国家重点实验室;
【基金】：国家自然科学基金资助项目(51104156) 教育部科学技术研究资助项目(113031A) 煤炭资源与安全开采国家重点实验室大学生科技创新计划资助项目(SKLMD2015005)
【分类号】：TD745
本文编号：2428557
[Abstract]:The surface potential of coal and rock during water inrush was measured by the simulation test system of coal and rock surface potential of water inrush, and the law of change of surface potential of coal and rock during water inrush was studied. It is concluded that the surface potential of coal and rock mass has significant spatiotemporal response to the evolution of water inrush and can reflect the internal fracture and fracture propagation of coal and rock mass. The evolution process of water inrush can be divided into three stages: inoculation period, crack spreading stage and large-scale water inrush stage, the surface potential signal is relatively stable during incubation period, and the potential signal fluctuates up and down during the crack spreading period and large-scale water inrush period. The level of surface potential signal at different positions is generally different, and the signal level of the same position is positively correlated with pore water pressure and the fracture strength of coal and rock mass.
【作者单位】： 中国矿业大学安全工程学院;中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室;中国矿业大学煤炭资源与安全开采国家重点实验室;
【基金】：国家自然科学基金资助项目(51104156) 教育部科学技术研究资助项目(113031A) 煤炭资源与安全开采国家重点实验室大学生科技创新计划资助项目(SKLMD2015005)
【分类号】：TD745
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