2北206工作面沿空留巷围岩控制技术研究及应用

Study and Application of Surrounding Rock Control Technology of Gob Side Entry Retaining in the 2 206 Working Face

为了控制大兴矿业2北206运输巷留窄煤柱沿空掘巷围岩变形,通过对巷道不同区段围岩结构和变形特征的分析,针对性提出在正常区段采用"锚网带"支护方案,在过采空区段采用"锚网索带+槽钢梁+缩小锚杆间排距"加强支护方案。现场实测结果表明:2北206运输巷两帮和顶底板最大移近量分别为121.08 mm和44.83 mm,巷道围岩变形得到了有效控制。

In order to control the surrounding rock deformation of the 2North 206 transportation roadway with narrow coal pillar driving along the goaf in Daxing Mining Industry, through the analysis of the surrounding rock structure and deformation characteristics of different sections of the roadway, it is proposed to adopt the "anchor mesh belt" support scheme in the normal section and the "anchor mesh cable belt + channel steel beam + reducing the row spacing between bolts" to strengthen the support scheme in the goaf section. The field measurement results show that the maximum approaches of two sides, roof and floor of the 2North 206 transportation roadway are 121.08 mm and 44.83 mm respectively, and the deformation of roadway surrounding rock has been effectively controlled.