问:处理采空区(即顶板管理)有哪几种方法? 答:基本有四种。一是全部垮落法,也叫陷落法。就是随着工作面的推进,撤出采空区的支架,让直接顶自行垮落或强制垮落。这就是常说的回柱放顶。二是充填法。即把砂子、矸石充填采空区,支撑直接顶,不让垮落。全部填满的,叫全部充填法,多数 Q: How to deal with goafs (that is, roof management)? A: There are basically four. First, all the law collapse, also known as the law of collapse. With the advancement of the work surface, the support of the goaf is withdrawn so that the direct roof can collapse or force it to collapse. This is often said back to the top column. Second, filling method. Namely sand, waste filling gob, supporting the direct top, let the collapse. All filled, called all filling method, most