|本期目录/Table of Contents|

[1]张民波,朱红青,吝曼卿,等.加卸载下含水率对含瓦斯煤岩损伤变形的影响分析[J].中国安全生产科学技术,2017,13(5):90-95.[doi:10.11731/j.issn.1673-193x.2017.05.015]
 ZHANG Minbo,ZHU Hongqing,LIN Manqing,et al.Effect of moisture content on damage deformation of coal containing gas under loading and unloading conditions[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(5):90-95.[doi:10.11731/j.issn.1673-193x.2017.05.015]
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加卸载下含水率对含瓦斯煤岩损伤变形的影响分析
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
13
期数:
2017年5期
页码:
90-95
栏目:
现代职业安全卫生管理与技术
出版日期:
2017-05-31

文章信息/Info

Title:
Effect of moisture content on damage deformation of coal containing gas under loading and unloading conditions
文章编号:
1673-193X(2017)-05-0090-06
作者:
张民波12朱红青2吝曼卿1周德红1李文1
1.武汉工程大学 资源与土木工程学院,湖北 武汉 430205;2.中国矿业大学北京资源与安全工程学院,北京 100083
Author(s):
ZHANG Minbo12 ZHU Hongqing2 LIN Manqing1 ZHOU Dehong1 LI Wen1
1. School of Resource and Civil Engineering, Wuhan Institute of Technology ,Wuhan Hubei 430205, China; 2. School of Resource and Safety Engineering, China University of Mining and TechnologyBeijing, Beijing 100083, China
关键词:
加卸载含水率损伤变形弹性能耗散能
Keywords:
loading and unloading moisture content damage deformation elastic energy dissipation energy
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2017.05.015
文献标志码:
A
摘要:
采用含瓦斯煤热流固耦合三轴伺服控制渗流试验装置对不同含水状态煤样进行了加卸载下三轴变形与渗流特性的试验研究。研究结果表明:含水率越高,煤样的三轴强度越低,失去抵抗外部载荷所产生破坏的能力越快,且塑性变形增强,脆性破坏减弱,瓦斯流量增加越小;含水率的增加能够使得煤岩破坏时积聚的弹性能减少,并且释放速率更加缓慢,更多的消耗于塑性变形中,这有助于预防煤岩破坏时由于弹性能的突然释放而导致的大型煤与瓦斯突出事故的发生;基于Logistic方程和能量耗散理论,建立了煤岩损伤演化数学模型,通过对试验数据的拟合分析,两者吻合程度较高,能够为煤岩损伤破坏提供预测。研究结果对于具有煤与瓦斯突出危险性的煤层进行注水消突具有理论指导意义。
Abstract:
The experimental study on triaxial deformation and seepage characteristics of coal samples with different moisture contents under loading and unloading conditions was conducted by using the triaxial servo-controlled seepage experimental device for heat-fluid-solid coupling of coal containing gas. The results showed that the higher the moisture content, the lower the triaxial strength of coal sample, the ability to resist the failure generated by external load reduced more quickly, and the plastic deformation enhanced, the brittle failure weakened, the smaller the increase of gas flow. The increase of moisture content could make the elastic energy accumulated during the failure of coal-rock decrease, and the release rate become more slowly, being more consumed in plastic deformation, which will help to prevent the occurrence of large coal and gas outburst caused by the sudden release of elastic energy during the failure of coal-rock. A mathematical model of coal-rock damage evolution was established based on the Logistic equation and the energy dissipation theory. Through the fitting analysis on the experimental data, a higher degree of agreement between the two was obtained, which can provide the prediction for damage failure of coal-rock. The results has theoretical guiding significance for coal seam with the hazard of coal and gas outburst to eliminate outburst with water injection.

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备注/Memo

备注/Memo:
湖北省教育厅科学技术研究计划青年人才项目;武汉工程大学科学研究基金项目(k201617)
更新日期/Last Update: 2017-06-09