摘要
我国近年来千米深井不断增多,覆岩破坏形式和破坏范围也越来越严重。从千米深井大采高覆岩运动和顶板破坏的形式及应力分布特征出发,利用RFPA数值模拟的方法进行了大采高工作面的覆岩破坏过程的研究,得出了在千米深井工作面推采时主应力向两侧转移,且大致沿岩层移动角出现扇形应力降低区的结论。随着工作面的继续推进,采空区上方覆岩破坏和位移具有明显的分带性,各带特征明显不同,但其界面逐渐过渡,空间形态大致呈对称的"马鞍"形分布。
Recent years, the number of kilometer well has increasing constantly in China, and the failure form and range of overburden rock also have become more and more serious. Based on overburden rock movements and form and stress distribution characteristics of roof in kilometer well large mining, the reduced area appears along displacement angle broadly during working face mining of kilometer well is obtained. With the forwarding of working face, failure and displacement of overburden rock appeared ob- vious distinct zone above goal, and each zone has obvious different characteristics. But boundary surface transited gradually with spatial form of symmetrical ＂U-shaped＂ distribution broadly.
出处
《现代矿业》
CAS
2013年第3期1-4,共4页
Modern Mining
基金
国家自然科学基金(编号:51144006)
国家973计划(编号:2012CB723104)
山东科技大学2012-2013年度研究生科技创新基金资助(编号:YCB120102)
关键词
千米深井
大采高工作面
数值模拟
覆岩破坏过程
RFPA
Kilometer well, Large mining height working face, Numerical simulation, Failureprocess of overburden rock, RFPA
