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阐述了沿空留巷支护的发展及施工的难点,沿空切顶留巷的原理与支护应用情况。以唐山沟煤矿8820工作面无煤柱开采为工程背景,介绍了沿空切顶留巷的施工设计与施工过程,重点介绍了巷内支护的施工及遇到的问题,并提出改进方案。
The development of gob-side entry retaining support and the difficulties in construction are described. The principle of gob-side entry retaining along goaf and the application of support are described. Taking the non-pillar mining of 8820 working face of Tangshangou coal mine as the engineering background, the construction design and construction process of cutting along laneway with top-left laneway are introduced. The construction and problems encountered in laneway support are introduced emphatically, and the improvement plan is put forward.