富水弱胶结软岩巷道多场耦合灾变机制与协同控制技术研究OA

Aiming at the problems of large deformation,frequent support failures,high maintenance costs and others in the rich water and weak cemented soft rock roadway of the 3808S transportation roadway of Yushujing Coal Mine,based on the disaster-causing theory of"water-force-chemical multi-field coupling",a collaborative control technology of"source interception and seepage control-three-dimensional reinforcement-coordinated pressure relief"is proposed.Deep hole curtain grouting source interception and seepage control,full cross section three-dimensional anchoring reinforcement,and constant resistance yielding anchor cable coordinate pressure relief are adopted.The on-site engineering practice indicates that this technology effectively decreases the displacement amount of the roof and floor,which is reduced from the original 1200 mm to between 250-300 mm,the heaving floor amount is decreased from 650 mm to 80-120 mm,the anchor rod failure rate is decreased from 25%to 3%,the maintenance cost is decreased from 1800 yuan/m to 700 yuan/m,and the monthly footage is improved from 300 m to 550 m.This technology effectively solves the disaster problem of rich water soft rock roadways and provides reference for similar projects.