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唐口煤矿2308工作面运输平巷为深井条件下沿空掘进巷道,受深井高地压及回采动压影响,巷道维护十分困难。通过理论计算与数值模拟研究对窄煤柱的宽度进行优化设计,提出了深井高地压条件下沿空巷道高强度锚网索支护设计方案,后期经过开帮、落底施工,有效抑制了巷道的围岩变形,保证了巷道服务期间2308工作面的安全生产,提高了煤炭资源回收率。
Tangkou Coal Mine 2308 working face transportation laneway is a roadway along the roadway driven by deep well. Affected by deep well pressure and dynamic pressure of mining, roadway maintenance is very difficult. Based on the theoretical calculation and numerical simulation, the width of narrow coal pillar is optimized. The design scheme of high strength anchor net supported by gob-side entry under the conditions of deep well and high pressure is put forward. After the construction is completed, the roadway can be effectively suppressed Of the deformation of surrounding rock to ensure the safety of 2308 face during tunneling service, improve the recovery rate of coal resources.