单轴压缩煤岩破裂电荷尺寸效应试验研究

doi:10.16265/j.cnki.issn1003-3033.2018.04.022

中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (4): 128-132.doi: 10.16265/j.cnki.issn1003-3033.2018.04.022

单轴压缩煤岩破裂电荷尺寸效应试验研究

王亚林¹, 潘一山^1,2 教授, 马箫¹, 朱小景¹, 罗浩³

1 辽宁工程技术大学力学与工程学院,辽宁阜新 123000
2 辽宁大学物理学院,辽宁沈阳 110036
3 辽宁大学信息学院,辽宁沈阳 110036

收稿日期:2018-01-11 修回日期:2018-03-21 出版日期:2018-04-28 发布日期:2020-09-28
作者简介:王亚林(1985—),男,山西朔州人,博士研究生,研究方向为矿山动力灾害的预测及防治。E-mail:597396887@qq.com。
基金资助:
国家重点研发计划(2016YFC0801403)。

Experimental study on fracture charge scale effect of coal specimen under uniaxial compression

WANG Yalin¹, PAN Yishan^1,2, MA Xiao¹, ZHU Xiaojing¹, LUO Hao³

1 School of Mechanics and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China
2 School of Physics, Liaoning University, Shenyang Liaoning 110036, China
3 School of Information, Liaoning University, Shenyang Liaoning 110036, China

Received:2018-01-11 Revised:2018-03-21 Online:2018-04-28 Published:2020-09-28

摘要/Abstract

摘要： 为研究不同尺寸煤岩裂隙发生发展差异性,在单轴压缩条件下,采用电荷感应技术研究煤岩破裂电荷信号和煤岩尺寸的关系,得出单轴压缩煤岩破裂电荷尺寸效应。结果表明:单轴压缩条件下,单位体积电荷量随体积以幂函数关系增长;单位面积电荷量随面积以幂函数关系增长;单轴压缩煤岩破裂电荷的尺寸效应源于煤岩的非均匀性;大体积或大面积煤岩含有原生裂隙和大裂隙的数量越多,煤岩就越不均匀,原生裂隙的扩展和新生裂隙的产生、扩展概率也就越大,因而产生静电荷量越大。

关键词: 煤岩破裂, 尺寸效应, 单位体积电荷量, 幂函数关系, 单位面积电荷量, 原生裂隙

Abstract: In order to study the difference in the occurrence and development of fractures in coal samples different in size, experiments were performed. Under uniaxial compression conditions, the relationship between the size of coal and the charge signal of coal fracture was studied by charge induction technology. The results show that electric charge per unit volume is a power function of the volume under uniaxial compression and electric charge per unit area is a power function of the area under uniaxial compression, that the existence of charge scale effect of coal specimen is due to the heterogeneity of coal samples, that there is low-level preexisting fracture in large volume or area coal specimen, so the probability of the expansion of original cracks and the generation and expansion of new cracks is greater in coal samples of large volume or area, and the numerous cracks cause the generation of more electrostatic charges.

Key words: fracture of coal, scale effect, quantity of electric charge of unit volume, power function, quantity of electric charge of unit area, initial fissure

中图分类号:

X936

王亚林, 潘一山, 马箫, 朱小景, 罗浩. 单轴压缩煤岩破裂电荷尺寸效应试验研究[J]. 中国安全科学学报, 2018, 28(4): 128-132.

WANG Yalin, PAN Yishan, MA Xiao, ZHU Xiaojing, LUO Hao. Experimental study on fracture charge scale effect of coal specimen under uniaxial compression[J]. China Safety Science Journal, 2018, 28(4): 128-132.

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单轴压缩煤岩破裂电荷尺寸效应试验研究

Experimental study on fracture charge scale effect of coal specimen under uniaxial compression

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