含水率对预制裂纹煤样能耗与破坏模式的影响

doi:10.16265/j.cnki.issn1003-3033.2017.07.017

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (7): 94-98.doi: 10.16265/j.cnki.issn1003-3033.2017.07.017

含水率对预制裂纹煤样能耗与破坏模式的影响

康向涛¹ 副教授, 刘勇¹ 教授, 江成玉¹ 讲师, 宋真龙², 高林¹ 讲师

1 贵州大学矿业学院,贵州贵阳 550025;
2 重庆大学煤矿灾害动力学与控制国家重点实验室,重庆 400030

收稿日期:2017-04-17 修回日期:2017-06-20 发布日期:2020-11-26
作者简介:康向涛 (1980—),男,河南汝州人,博士,副教授,主要从事矿业工程、安全工程和矿井瓦斯防治方面的教学与科研工作。E-mail: xiaokangedu@163.com。
基金资助:
贵州大学引进人才科研项目(贵大人基合字(2015)15)。

Influence of water content on energy consumption and destruction form of coal samples with prefabricated crack

KANG Xiangtao¹, LIU Yong¹, JIANG Chengyu¹, SONG Zhenlong², GAO Lin¹

1 Mining College, Guizhou University, Guiyang Guizhou 550025, China;
2 State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, China

Received:2017-04-17 Revised:2017-06-20 Published:2020-11-26

摘要/Abstract

摘要： 为研究注水对煤层破坏特性的影响,开展煤样单轴压缩试验,观察不同含水率预制裂纹型煤试件的能耗及破坏模式。结果表明:随着含水率的增加,煤样单轴抗压强度和弹性模量均以负指数函数方式下降;煤样积聚的总能量、存储的弹性能和破坏的耗散能均随含水率以二次抛物线递减函数方式减小;煤样中预制裂纹产生起裂点所需轴向应力和峰值应力随含水率逐渐减小;试样破坏形式随含水率由单一剪切破坏发展到拉伸破坏,然后剪切拉伸复合型破坏。

关键词: 含水率, 预制裂纹, 煤样, 能量积聚, 能量耗散, 破坏模式

Abstract: In order to investigate the influence of water injection on destruction of coal seam, uniaxial compression experiments were carried out on coal samples.Effects of water content on the energy consumption and destruction form of prefabricated cracks in coal samples were studied.The test result indicates that there is a negative exponential correlation between both the uniaxial compressive strength and elastic modulus and the water content,It is also found that the relationships between the total energy accumulation,stored elastic energy,and dissipated energy of destruction of coal sample and the water content take on the form of decreasing quadratic parabola function, that there is a negative correlation between both the axial stress and peak stress required initiate crack during prefabrication and the peak stress and the water content, and that the destruction form of the sample is a function of the water content.

Key words: water content, prefabricated crack, coal samples, energy accumulation, energy dissipation, destruction form

中图分类号:

X936

康向涛, 刘勇, 江成玉, 宋真龙, 高林. 含水率对预制裂纹煤样能耗与破坏模式的影响[J]. 中国安全科学学报, 2017, 27(7): 94-98.

KANG Xiangtao, LIU Yong, JIANG Chengyu, SONG Zhenlong, GAO Lin. Influence of water content on energy consumption and destruction form of coal samples with prefabricated crack[J]. China Safety Science Journal, 2017, 27(7): 94-98.

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含水率对预制裂纹煤样能耗与破坏模式的影响

Influence of water content on energy consumption and destruction form of coal samples with prefabricated crack

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