Study On The Relationship Between Kou Zidong Mine Deep Crustal Stress Distribution And Roadway Layout

With the development of underground coal mining to the deep gradually,the original rock stress of mine with mining depth increasing. Kou Zidong mine deep "complex geological mechanics environment adisturbance" makes the stability of the roadway surrounding deformation is serious, mine pressure severe appearance, top management and theheavy maintenance work. Therefore, the deep relationship between in situ stress measurement based on in-situ stress in situ, roadway surrounding rock deformation, damage and stress size, direction relations, studies the relationship between Kou Zidong coal mine deepcrustal stress and roadway layout, has important theoretical referencevalue and engineering significance of pressure behavior and find out the inherent laws of roadway arrangement.Through theoretical analysis, field test, numerical simulation methods to Kou Zidong mine deep crustal stress distribution and roadway layout relationswere studied. According to the principle of in-situ stress measurement and the relationship between the deep roadway layout and stress theory,using the hollow inclusion method for in-situ stress measurement, the use of FLAC3D to carry out Kou Zidong mine deep tunnel axis and horizontal stress angle relationship research, and put forward reasonable suggestions for deep roadway layout of the mine. The results show that:(1) The maximum principal stress range in the level of Kou Zidong mine-967m NE110°～125°range, the average maximum horizontal principal stress is33.13MPa, the average minimum horizontal principal stress18.57MPa,intermediate mean principal stress24.43MPa. The main stress belongs to the type of horizontal stress field, show that:Kou Zidong mine stress is bigger than the vertical stress deep level, and the maximum horizontal principal stress was significantly higher than the minimum horizontal principal stress,which showed obvious direction.(2) Using FLAC3D to simulate and analyze the Kou Zidong mine roadway axis and stress at an angle, the maximum horizontal stress direction should be included and the axis of tunnel deformation and failure have an important impact on theconclusion, on the roadway is:when the tunnel axis and the maximum horizontal principal stress parallel, roadway affected by horizontal stressminimum, is conducive to the top and bottom angle stability; the degree ofdeformation and damage degree, the more intense the roadway.(3) Numerical simulation of the tunnel shape on the influence law of tunnel destruction, results show that:in the same geological conditions with the same stress under the action of circular roadway damage, significantly less than the semi-circular arched tunnel. Therefore, the deep mininglayout of circular tunnel is more conducive to the roadway maintenance.