动力扰动下锚-喷-注一体化围岩加固技术

Anchoring-spraying-grouting Integrated Surrounding Rock Reinforcing Technology Under Dynamic Disturbance

针对某矿东翼采区上山煤层大巷群受工作面回采扰动影响破坏严重现象,提出了锚-喷-注一体化强化围岩结构、控制巷道围岩稳定性的防治思路。通过理论分析、数值模拟以及实验室对水泥浆液参数测定结果,提出了采用水灰比为1.5∶1的超细水泥浆液对巷道围岩进行分层次耦合注浆加固。现场矿压观测结果表明:锚-喷-注一体化强化技术能够很好的控制受工作面采动扰动影响煤层大巷群围岩的稳定性。

For the problem that the uphill coal roadway group in east wing mining area of a mine is damaged by mining distur-ba^lce, the paper proposed the prevention and control idea of anchoring-spraying-grouting integration to strengthen surroundingrock structure and control the stability of surrounding rock. Through theoretical analysis, numerical simulation and laboratory testresults of cement slurry parameters, the superfine cement slurry with water cement ratio of 1.5：1 was proposed to reinforce theroadway surrounding rock. The in-situ rock pressure observation results show that the technology of anchoring-spraying-groutingintegration can well control the stability of surrounding rock of coal seam under mining disturbance of working face.