Down The Mountain Tunnel Group Technology Research And Application Of Fault

Mine in the construction and production process of many tunnel projects often encountered gap is relatively large fault fracture zone, according to the layout of the overall design of the project, often unable to escape, permanent roadway in large gap fault fracture zone in the construction, construction process of water hazard prevention and control of roadway roof management and roadway of long term maintenance has been in recent years in coal mine production and construction needs to solve technical problems.This paper in New River Mining Company mine field boundary adjustments as a result of the mine extension engineering of deep dip roadway group drop 300-600 m Jiaxiang three fault in engineering background, through 3D seismic exploration, fault containing Jiaxiang of of water exploration and geological prospecting guide branch fault area of engineering quality. At the same time, the coal and rock physical and mechanical properties of test, and the wear fault of surrounding rock stability analysis and evaluation. Analysis of the surrounding rock grouting reinforcement mechanism and fracture belt of grouting for stopping up water principle, and the development of the surrounding rock grouting reinforcement scheme: one is combination of pre grouting and grouting, the second is the combination of the length of the grouting, plugging water and reinforcement combined, security fault fracture belt construction safety and roadway surrounding rock stability, and improve the roadway support speed and reduce the cost of grouting. Through numerical simulation experiment to determine the roadway layout, in Xinhe coal mine roadway through fault belt is a special case, the construction technique and technics of the integrated step by step implementation of the fault zone, formed a high strength and full range stereo branch supporting system, grouting and high strength support support system combining, spray the anchor net active support of support and canopy of U steel passive support combined to ensure fault conditions support support system reliability of large section roadway; the U-shaped shed and lock roof bolt and grouting support support as a fault permanent roadway supporting. The safety and speed of the roadway is ensured through this fault.At the level of the New River Mining Company-980 m extended deep engineering field test, the roadway surrounding rock deformation observation of completed. Through the observation data analysis determined in deep wells and complex conditions down the tunnel group through the gap larger Jiaxiang three teams of fault, to meet the future needs of the mine production. It also provides guidance and reference for the fault of other coal mine tunnels over the same time.