摘要
为实现某矿现采工作面围岩的稳定性,针对采动影响段设计采用锚杆、金属网、钢筋梯子梁、锚索补强联合支护技术,并对比分析有无支护下围岩变形最大位置在掘进距离192～204m间,无支护时煤柱帮、回采帮最大移近量分别为2 037 mm、1 285 mm,有支护下其变形最大量分别为38 mm、59 mm,移近量降低率分别为98.1％、95.4％,表明采取优化支护方案后,围岩能够实现很好的稳定控制.
Abstract
In order to achieve the stability of the surrounding rock of the current mining face in a mine,the joint support technology of anchor rods,metal mesh,reinforced ladder beams and anchor cable reinforcement is adopted for the section affected by the mining action,and the maximum deformation of the surrounding rock with and without support is analysed in the range between 192 and 204 m of the excavation distance,and when there is no support,the maximum amount of the coal pillar gangs and the return gangs is 2,037 mm and 1,285 mm,respectively;and the maximum amount of deformation is 38 mm and 59 mm,respectively,and the reduction rate of the amount of the deformation is 38 mm and 59 mm,respectively.Under the support,the maximum amount of deformation is 38 mm and 59 mm,and the reduction rate of the amount of proximity is 98.1％and 95.4％,which indicates that the perimeter rock can be well stabilised and controlled after adopting the optimised support scheme.
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