The roadway of caving mining face in extremely-thick in Tangshan Mining Branch Co.,is laid out by supporting top coal along the bottom;the haulage roadway and the return air-way of the T2193 face is the driving roadway along goaf with small coal pillars;the size of the working face cut section is 7600 mm×2800 mm (width× height).In the paper,the deficiency of original support parameters of 3 roadways is analyzed,and an improved scheme of using bolt-mesh combined support technology is proposed.And the parameters and construction process of the combined support technology are introduced.%唐山矿业公司特厚煤层放顶煤开采工作面巷道沿底板托煤顶布置,T2193工作面运输巷、回风巷为小煤柱沿空送巷,工作面切眼断面尺寸7600 mm×2800 mm (宽×高)。分析了3条巷道原支护参数的不足,提出改进方案应采用锚网联合支护技术。介绍了锚网联合支护技术参数及施工工艺。
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