| 组合煤岩力学性质与声-电荷信号关系研究 |
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| 引用本文： | 肖晓春,樊玉峰,吴迪,丁鑫,王磊.组合煤岩力学性质与声-电荷信号关系研究[J].中国安全生产科学技术,2018,14(2):126-132. |
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| 作者姓名： | 肖晓春 樊玉峰 吴迪 丁鑫 王磊 |
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| 作者单位： | (1.辽宁工程技术大学 力学与工程学院，辽宁 阜新 123000；
2.重庆大学 煤矿灾害动力学与控制国家重点实验室，重庆 400044) |
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| 摘 要： | 为探究组合煤岩力学性质与声-电荷信号关系，选用新邱矿区煤样和砂岩制备组合煤岩试样，采用物理实验和数值实验相结合的方法，开展不同岩煤高度比的组合煤岩试样受载破坏声发射与电荷感应监测试验，得到了组合煤岩力学性质、声-电荷信号规律及其相互关系。结果表明:组合煤岩试样中的岩石高度提高会提升其整体强度，其破坏脆性特征显著，冲击倾向性增强，弹性阶段的声发射信号提前，声发射能量累积量增加，峰后声发射能量变化率及电荷变化率增大；组合煤岩峰后产生连续声发射信号和电荷信号，强冲击和中等冲击组合煤岩破坏时声发射能量变化率分别为0.336和0.047 J/s,电荷变化率分别为204.88和24.52 pC/s。声发射信号与电荷信号可以在一定程度上反应组合煤岩应力状态并预测失稳破坏，为通过信号监测煤体冲击地压灾害发生提供依据。
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| 关 键 词： | 矿山安全 组合煤岩 力学性质 声-电荷信号 冲击破坏 |
Study on relationship between mechanical properties and acoustic emission-charge signals of combined coal-rock |
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| XIAO Xiaochun,,FAN Yufeng,,WU Di,,DING Xin,,WANG Lei,.Study on relationship between mechanical properties and acoustic emission-charge signals of combined coal-rock[J].Journal of Safety Science and Technology,2018,14(2):126-132. |
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| Authors: | XIAO Xiaochun FAN Yufeng WU Di DING Xin WANG Lei |
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| Affiliation: | (1. School of Mechanics and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China;
2. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China) |
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| Abstract: | In order to explore the relationship between the mechanical properties and the acoustic emission-charge signals of combined coal-rock, the samples of combined coal-rock were prepared by selecting the coal sample and sandstone from Xinqiu mining area. The acoustic emission and charge induction monitoring tests on the loading failure of combined coal-rock samples under different height ratios of rock to coal were carried out by using the combined methods of physical experiment and numerical experiment, and the mechanical properties, acoustic emission-charge signals laws and their relationship of combined coal-rock were obtained. The results showed that with the increase of rock height in the combined coal-rock samples, the integral strength of the combined coal-rock samples increased, the failure brittleness characteristic was significant, the impact tendency increased, the acoustic emission signal in the elastic stage was advanced, the accumulation amount of acoustic emission energy increased, and the change rate of acoustic emission energy and the change rate of charge after the peak increased. The continuous acoustic emission signal and charge signal appeared after the peak, the change rate of acoustic emission energy in the failure of combined coal-rock under the strong and medium impact was 0.336 J/s and 0.047 J/s respectively, and the change rate of charge was 204.88 pC/s and 24.52 pC/s respectively. The acoustic emission signal and charge signal can reflect the stress status and predict the instability failure of combined coal-rock to a certain degree, and provide the basis for monitoring the occurrence of coal rock burst disaster through the signals. |
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| Keywords: | mine safety combined coal-rock mechanical property acoustic emission-charge signals impact failure |
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