受载复合煤岩变形破裂电荷感应变化规律

doi:10.16265/j.cnki.issn1003-3033.2017.12.014

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (12): 80-85.doi: 10.16265/j.cnki.issn1003-3033.2017.12.014

受载复合煤岩变形破裂电荷感应变化规律

杨桢^1,2 副教授, 李鑫^**1 副教授, 邱彬¹ 副教授, 赵扬锋² 教授, 苏小平¹

¹辽宁工程技术大学电气与控制工程学院,辽宁葫芦岛 125105
²辽宁工程技术大学力学与工程学院,辽宁阜新 123000

收稿日期:2017-09-03 修回日期:2017-11-13 出版日期:2017-12-28 发布日期:2020-10-10
通讯作者: ** 李鑫(1981—),女,辽宁阜新人,博士,副教授,主要从事煤矿安全监测与监控方面的研究。E-mail:lixinyz@126.com。
作者简介:杨桢 (1980—),男,江苏阜宁人,博士,副教授,主要从事煤矿安全监测与监控方面的研究。E-mail: yangzhen1980219@163.com。
基金资助:
国家自然科学基金青年基金资助(51604141,51204087);辽宁省自然科学基金面上项目资助(20170540427)。

Variation routine of charge induction in deformation and fracture of composite coal-rock under load

YANG Zhen^1,2, LI Xin^1,3, QIU Bin¹, ZHAO Yangfeng², SU Xiaoping¹

¹College of Electrical and Engineering Control, Liaoning Technical University, Huludao Liaoning 125105, China
²School of Mechanics and Engineering, Liaoning Technical University, Fuxin Liaoning 123000,China

Received:2017-09-03 Revised:2017-11-13 Online:2017-12-28 Published:2020-10-10

摘要/Abstract

摘要： 为有效提取煤岩动力灾害电荷感应前兆特征以提高其预测准确率,在0.1、0.3和 1 mm/min等3种加载速率下对复合煤岩进行单轴加载破裂试验,采用自主研制的新型电荷传感器检测电荷感应信号,研究复合煤岩变形破裂过程中电荷感应信号变化规律及机制。试验结果表明:复合煤岩失稳破裂前有明显的阵发性、不连续的电荷感应脉冲前兆信号;电荷感应信号随着加载应力水平的增加逐渐增强,在临近峰值应力前达到最强;当0.1 mm/min加载速率时,复合煤岩产生的电荷感应信号最强;复合煤岩煤样部分的电荷感应信号变化较顶底板岩体明显;复合煤岩破裂产生的电荷感应信号与其内部破裂、摩擦、热效应等因素有关。

关键词: 复合煤岩, 变形破裂, 电荷感应, 变化规律, 前兆特征

Abstract: In order to effectively extract charge induction precursor of coal-rock dynamic disaster and improve the prediction accuracy, uniaxial loading fracture experiments were carried out on samples of composite coal-rock taken from a coal mine in Shanxi province at loading rates of 0.1, 0.3, 1 mm/min. Variation law and mechanism of charge induction signal in the process of deformation and rupture of composite coal-rock were studied. The results show that there are significant paroxysmal and discontinuous charge induced impulse precursory signals before deformation and fracture of the composite coal-rock, that the charge induction signal increases with the increase of the loading stress level, and reaches the strongest before the peak stress,that the charge induction signal is the strongest at the loading rate of 0.1 mm/min, that the charge signal of coal sample is more obvious than that of the top plate, and that the charge induction signal is related to the internal rupture, friction and thermal effect.

Key words: composite coal-rock, deformation and fracture, charge induction, variation routine, precursory extraction

中图分类号:

X936

杨桢, 李鑫, 邱彬, 赵扬锋, 苏小平. 受载复合煤岩变形破裂电荷感应变化规律[J]. 中国安全科学学报, 2017, 27(12): 80-85.

YANG Zhen, LI Xin, QIU Bin, ZHAO Yangfeng, SU Xiaoping. Variation routine of charge induction in deformation and fracture of composite coal-rock under load[J]. China Safety Science Journal, 2017, 27(12): 80-85.

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受载复合煤岩变形破裂电荷感应变化规律

Variation routine of charge induction in deformation and fracture of composite coal-rock under load

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