“三软”煤层回采工作面初次放顶过程中垮面机理分析

Discussing on the First Roof Caving of Working Face in Three-soft Seam

根据石嘴山矿区的地质条件及回采实践,分析了以2层煤为代表的"三软"煤层在初采初放期间,其顶板控制方面存在的问题,以及问题产生的机理。根据顶板常发、易发的问题分析,结合笔者的工作经验,提出了几点意见,以供参考应用。

In accordance with the geological conditions and stoping practice in Shizuishan mining area, the problems and producing mechanism of roof control during the first mining and first roof caving in three-soft seam represented by the second coal were analyzed. Based on the recurrent problem analysis of roof, some suggestions were put forward in combination with author’s working experience, which will provide reference for similar mining face.