摘要
针对大同矿区坚硬煤层坚硬顶板及坚硬覆岩介绍了一种特殊的开采沉陷实例,即大同矿区"三硬"条件上覆岩层大面积整体突然切冒。从煤层特征、围岩性质、采煤方法及顶板控制等方面对影响顶板大面积一次性整体切冒的因素进行了详细分析,阐述了坚硬顶板大面积一次性整体切冒的机理,指出了其对井下采场和地表破坏具有突发性、随机性和滞后性。因此对大同矿区开采沉陷的治理具有重要意义。
A special mining subsidence case was introduced here. That is, total collapse of overlying rock for hard coal, hard roof and overlying strata in Datong Mining Area. Factors of influencing total collapse of roof were analyzed from characteristics of coal seam and surrounding rock, mining method and roof control. Mechanism of total collapse of hard roof was given and it caused abrupt, random and late characteristics of underground mining field and surface damage, which provided important reference for controlling mining subsidence of Datong Mining Area.
出处
《煤矿开采》
2008年第1期62-65,81,共5页
Coal Mining Technology
关键词
坚硬顶板
整体切冒
地表塌陷
hard roof
total collapse
surface subsidence
