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煤柱区巷道超前支护段围岩破坏机制及控制技术

Surrounding Rock Damage Mechanism and Control Technology of Advanced Supporting Section of Roadway under Coal-pillar

  • 摘要: 新阳矿新102综放工作面材料巷超前支护段由于受多重支承压力和新102工作面采动影响,变形严重、支护困难,在详细分析巷道超前支护段变形破坏机制的基础上,提出了“锚网+ W钢带+锚索+U型钢棚”的联合支护方案,并在超前工作面30m范围内采用ZT2×3200/18/35型超前支护液压支架加强支护,在超前工作面30~100m范围内采用“单体支柱+π型钢梁,1梁3柱”的加强支护方式。现场观测表明,材料巷超前支护段顶板下沉量由原先平均27mm/d减少到8mm/d,保障了工作面安全生产,加快了工作面推进速度,提高了经济效益。

     

    Abstract: In Xinyang Colliery,serious deformation and difficult supporting occurred in advanced supporting section of rail roadway of new 102 full-mechanized caving mining face influenced by multi-time abutment pressures and new 102 face mining.On the basis of analyzing deformation and damage mechanism of the roadway,a combined supporting of“anchored mesh+W steel strip+anchored cable+ U-style steel”scheme was put forward.Within 30m of advanced supporting,ZT2×3200/18/35 advanced powered support was applied to reinforcing supporting.At the range of advanced 30-100m,reinforcement supporting of“single prop+π-style steel beam,1 beam+3 props”was applied.On-the-spot observation showed that roof subsidence reduced from 27mm/d to 8mm/d.This technology increased mining speed and improved economic profit in safety.

     

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