摘要
针对煤矿煤与瓦斯突出动力现象的复杂过程,对突出启动前煤体的初次破坏特征进行了分析。特别是对影响突出发生的煤体初次破坏的几何特征以及层裂拱壳形成的力学原理,通过简化的力学模型做了分析,同时讨论了影响初次破坏特性的主要因素,包括与不同煤体结构相适应的煤体材料不同破坏准则的影响。为进一步认识煤与瓦斯突出的机理,突出的启动、发展演化提供一种思路,进而为突出的预测和防治提供基础。
The characteristics of incipient failure of coal body before the initial coal and gas outburst is analyzed, especially the geometric characteristics of the incipient failure influencing the outburst are studied by a simplified model, which can explain the fracture of coal body and the formation of arching lamina. The main influencing factors of the incipient failure is also discussed, including different failure rules for coal materials caused by different damaged coal structures. This study provides some ways to increase the knowledge on the mechanism of coal and gas outburst, to probe the initiation and the evolution of the process of coal and gas outburst. Furthermore, it can also provide a theoretical base for the prediction, prevention and treatment of disaster caused by coal and gas outburst.
出处
《科技导报》
CAS
CSCD
2008年第16期55-59,共5页
Science & Technology Review
基金
中国科学院知识创新工程领域前沿项目
关键词
煤与瓦斯突出
初次破坏
层裂
影响因素
coal and gas outburst
incipient failure
lamina fracture
influencing factor
