局部顶板垮落的大断面机头扩刷技术

Large section head expansion brush technology of local roof caving

采用导硐法和正台阶法相结合的施工方法施工断面积为98.37m2机头硐室。采用在水平方向上划分台阶的方法,处理机头硐室顶板局部软弱部位。经验证,施工方法起到了明显的效果,巷道成形明显变好,控制了软弱顶板的垮落。

Using the construction method combined pilot tunnel method and positive bench method to construct the head chamber with cut-section of 98.37 m2. adopted the method of dividing steps in the horizontal direction to treat the local weak roof, After verification, the construction method has played a significant effect, the roadway forming significantly changed for the better, and controled the weak roof caving.