摘要
针对千秋煤矿21201工作面高地应力、巨厚、易燃复杂地质条件下冲击矿压频发的现状,采用FLAC3D软件模拟了工作面超前支承应力与相邻工作面采空区侧向支承应力叠加后形成动态应力场的变化规律。结果表明,在工作面前方局部区域产生3.3倍于原岩应力的垂直集中应力,在较高的动态集中应力作用下,煤体聚集了大量的弹性能,且该区域附近形成变化较大的错动剪应力,一定程度上加剧煤体破坏而引发冲击矿压。
According to the rock bumping frequently occurred status under the high stress, uhra thick seam, spontaneous combustion complicated geological conditions in 21201 coal mining face of Qianqiu Mine, the FLAC3D software was applied to simulate the variation law of the dynamic stress field formed by the pilot support stress of the coal mining face plus with side support stress of the goaf of the adjacent coal mining faces. The results showed that there was a vertical concentrated stress 3. 3 times of the original rock stress occurred in the front area of the coal mining face. Under the function of the high dynamic concentrated stress, the coal body would accumulate great elastic energy and a large variation displacement shearing stress would be formed near that area. Therefore the coal body failed in certain degree could cause the rock bumping.
出处
《煤炭工程》
北大核心
2009年第7期75-78,共4页
Coal Engineering
