摘要
为了尽可能地避免上、下采空区的贯通,采用了数值模拟的方法,针对不同煤层间距下,随着采空区下工作面的不断推进,研究上覆岩层的离层空间、动压显现特征以及"三带"裂隙高度。模拟结果表明,随着煤层间距不断增加,在工作面上方顶板岩层中的拉伸破坏单元逐渐的增多,加剧了采空区下坚硬顶板的垮落和断裂,同样减小了顶板的断裂步距。
In order to avoid upper and lower mined-out area,adopted the method of numerical simulation under different mining height are broken, with the propulsion, working face under the goaf abscission layer of overburden stratum at the research on space, the dynamic pressure characteristics as well as the ＂three zones＂ fracture height. Simulation results show that with the increasing of coal seam working face mining height are broken, the tensile failure unit in roof strata above the working face is gradually increasing, also reduced the roof fracture interval.
出处
《煤炭技术》
CAS
北大核心
2016年第1期52-54,共3页
Coal Technology
基金
国家自然科学基金(51144006)
新疆工程学院校内课题(2013xgy061512)
关键词
采空区下
煤层间距
数值模拟
裂隙高度
underground mined-out area
mining height
numerical simulation
flowing fractured zone
