摘要
运用ANSYS10.0的瞬态分析模块模拟了不同采放比顶煤初次垮落过程的应力状态变化,分析了顶煤初次放顶时煤体弹性能、瓦斯膨胀能等的变化情况.研究表明,在同等条件下,随采放比增加,顶煤初次垮落时发生瓦斯动力灾害的可能性增大.
The stress variation of roof coal seam with different ratio of excavating thickness to caving thickness in its initial caving process was analyzed analyzed , and the variation of elastic energy and potential energy of roof coal seam was as well. The results show that the outburst risk increase along with the increase of the ratio of excavating thickness to caving thickness under the same conditions.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2008年第8期841-844,共4页
Journal of China Coal Society
基金
国家重点基础研究发展计划(973)基金资助项目(2005CB221504)
关键词
顶煤
初次垮落
采放比
应力
煤与瓦斯突出
roof coal seam
initial caving
the ratio of excavating thickness to caving thickness of coal seam
stress
coal and gas outburst
