摘要
针对传统保护层开采保护范围确定方法的局限性,结合王行庄煤矿的实际情况,对该矿的保护层开采情况进行了实验室相似模拟,分析了试验矿井保护层开采期间被保护层的膨胀变形量、上覆岩层的应力变化趋势,并根据上覆岩层的应力变化得出了保护层开采期间沿走向的卸压角。
Aimed at the limitation of the traditional method for determining protection region, combined with the actual situation of Wan- gxingzhuang Coal Mine, similarity simulation is carried out for the protevtive layer situation, expansion deformation and stress variation of overlying strata about protected layer during mining are analyzed. The relief angle along trend direction is got according to the overburden stress changes. The results show that the determinated trend protection region is in accord with the actual site situation, it has a certain guiding significance for safe production of coal mine.
出处
《煤矿安全》
CAS
北大核心
2013年第11期33-36,共4页
Safety in Coal Mines
基金
河南省教育厅青年骨干教师资助项目(2010GGJS-185)
河南省科技厅资助项目(0921102310230)
关键词
保护层
保护范围
相似模拟
卸压角
protevtive layer
protection region
similarity simulation
relief angle
