| 不同组合比例煤岩的电荷感应与微震规律试验研究 |
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| 引用本文： | 赵扬锋,李兵,张超,程传杰.不同组合比例煤岩的电荷感应与微震规律试验研究[J].中国安全生产科学技术,2019,15(1):107-112. |
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| 作者姓名： | 赵扬锋 李兵 张超 程传杰 |
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| 作者单位： | (辽宁工程技术大学 力学与工程学院，辽宁 阜新 123000) |
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| 基金项目： | 基金项目: 国家自然科学基金面上项目(51274114)；国家重点研发计划项目（2016YFC0801403） |
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| 摘 要： | 针对煤岩在屈服破坏过程中有微震和电荷信号产生这一特征，利用自行设计的微震和电荷感应信号监测试验系统，分析不同组合比例煤岩在变形破裂过程中微震和电荷信号的变化规律。研究结果表明:微震和电荷信号是低频信号，信号频谱集中分布在0~80 Hz，应力突变与微震信号和电荷信号的产生及变化有较好的一致性；随着“煤-岩”高度比的增加，试样的单轴抗压强度减小，试样屈服破裂时微震和电荷信号幅值增大，同步性增强，试件破坏的突发性增强；试件破坏过程中电荷比微震信号数更多，初次明显的电荷信号也早于初次明显的微震信号。
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| 关 键 词： | 组合煤岩 失稳破坏 微震 电荷感应 |
Experimental study on charge induction and microseismic laws of coal and rock with different combination ratios |
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| ZHAO Yangfeng,LI Bing,ZHANG Chao,CHENG Chuanjie.Experimental study on charge induction and microseismic laws of coal and rock with different combination ratios[J].Journal of Safety Science and Technology,2019,15(1):107-112. |
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| Authors: | ZHAO Yangfeng LI Bing ZHANG Chao CHENG Chuanjie |
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| Affiliation: | (School of Mechanics and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China) |
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| Abstract: | Aiming at the characteristic that the microseismic and charge signals will generate in the yield failure process of coal and rock, the variation laws of the microseismic and charge signals during the deformation and fracture process of coal and rock with different combination ratios were analyzed by using the self designed monitoring experimental system of microseismic and charge induction signals. The results showed that the microseismic and charge signals were the low frequency signals, the spectrum of the signals was concentrated in 0~80 Hz, and the stress mutation was in good agreement with the generation and variation of microseismic and charge signals. With the increase of coal rock height ratio, the uniaxial compressive strength of specimens decreased, and when the specimens occurred yield fracture, the amplitude of microseismic and charge signals increased, the synchronism increased, and the sudden failure of the specimens strengthened. The number of charge signals was more than that of microseismic signals during the failure process of specimens, and the first obvious charge signal appeared earlier than the first obvious microseismic signal. |
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| Keywords: | combined coal and rock instability failure microseismic charge induction |
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