近距离突出煤层群条件下,保护层选择问题尚缺乏系统的研究,也没有成熟的技术及经验,西南地区近距离突出煤层群矿井众多,急需相关技术,以提高矿井的安全高效生产。为此对近距离突出煤层保护层选择进行了系统研究,通过实践取得了良好的效果。 Under the conditions of close-out coal seams, the selection of protective layers is still lack of systematic research and there is no mature technology and experience. There are many coal seams in the southwest of China. There is an urgent need of related technologies to improve the safe and efficient production of mines. Therefore, a systematic study has been conducted on the selection of the overburden coal seam protection at close range, and good results have been achieved through practice.