Research On Design And Supporting Technology In Cross Mining Roadway

Because of the influence of coal mine roadway caused by overlying coal cannotbe exploited, leads to coal resources waste phenomenon is serious, how does notdestroy the roadway floor to ensure reasonable overlying coal seam crossing roadwaymining its normal use premise, is the current solution to the resource exhausted mineand resource scarcity problem areas.In this paper, by mining pressure of the upper coal seam cross Lane mining lawanalysis revealed, systematic analysis of the working face floor support stress range offailure distribution and the bottom, and the plastic damage area was calculated in22319working face, combined with geological data,22319working surfaceinclination of length220m, can be broken floor depth calculate the work surface isabout h=0.7007+0.1079×220=24.44m. By using computer numerical simulationFLAC3D, different schemes of cross mining working face floor stress distribution inthe process of mining, optimize the contrast of two different working face layoutscheme, the open off cut close to the arrangement of7608working face.According to the field test, the stress, the deep surrounding rock stress, theloosen range data acquisition site anchor cable, through the analysis of the dataavailable, the anchor cable, have played the supporting role. the deep rock mass stresstest shows that the roadway within the rock mass stress peak in front of the workingface5~10m range. the loose circle testing can affect the upper work surface by mining,rock loose ring thickness increased, but the increase is not. The working face mininginfluence of surrounding rock loose circle is less than0.5m, the working faceextraction effect of loose circle is about0.7~1.1m. Based on those results further forroadway reinforcement design to provide the theory basis, thus reasonable crossmining roadway stability control technology.