摘要
为了对煤与瓦斯突出事故进行有效的预防和控制,运用断裂力学的基本理论,对开采解放层对防治煤与瓦斯突出所起的作用进行了理论分析,建立了被解放层Irwin-Kies关系的恒位移模型,并系统地分析了该模型内的各种能量关系。采用最大周向应力理论(σ_θ准则)来判断煤体中裂纹是否会扩展,运用能量释放率断裂准则(G准则)来判定裂纹是否会失稳扩展,提出了从减小煤体的应力强度因子和提高断裂韧度方面来防止煤与瓦斯突出的一种新方法。
In order to efficiently prevent and control the coal and gas outburst accidents in the mine and with the basic theory of the bra- king mechanics,the paper had a theoretical analysis on the mining protective seam function to prevent and control coal and gas outburst. A constant displacement model of Irwin-Kies relationship for the mining protected seam was established.The paper systematically analyzed the each energy relationship of the model.The paper,with the max periphery stress theory (σ_θcode),determine...
出处
《煤炭科学技术》
CAS
北大核心
2007年第4期22-25,28,共5页
Coal Science and Technology
基金
国家安全生产监督管理总局资助项目(05-296)
湖南省自然科学基金(06JJ2094)
关键词
断裂力学
煤与瓦斯突出
裂纹
弹性能
瓦斯热力学能
breaking mechanics
coal and gas outburst
cracking
elastic energy
gas thermal energy
