综采工作面回撤通道围岩支护及效果分析

Analysis on the Perimeter Rock Support and Effect of Retreating Passageway of Comprehensive Miningg Working Face

在分析3506综采工作面回撤通道现场条件、围岩支护参数等基础上,提出在末采期间通过锚索、垛式支架进行补强,通过强化回撤通道顶板支护强度及护表强度,减少末采期间采动压力对回撤通道围岩控制影响,并具体给出补强支护方案。现场应用后,回撤通道围岩变形量受末采采动压力影响较小,顶板、巷帮最大变形量分别控制在26.9 mm、34.2 mm以内。

On the basis of analysing the site conditions and peripheral rock support parameters of 3506 general mining face,it is proposed to strengthen the peripheral rock of the retraction channel during the last mining period by means of anchor cables and stacking brackets,so as to reduce the influence of mining pressure on the peripheral rock of the retraction channel during the last mining period by strengthening the strength of the roof plate support and the strength of the protection surface of the retraction channel and to give a specific solution for the reinforcement support.After the field application,the deformation of the peripheral rock of the retreat channel is less affected by the pressure of the final mining,and the maximum deformation of the roof plate and the roadway gang is controled within 26.9 mm and 34.2 mm,respectively.