Reseacli On The Surrotmdine Rock Stability And Control Techniques Of Large Section Roadway In Ganhe Coal Mine

Large cross-section roadway rock stability mechanism and control technology ofGanhe coal mine is studied by using laboratory experiments, theoretical analysis,model test, numerical simulation and field test in this paper. The main research resultsare:(1) Rock geomechanical feature and stability classification of Ganhe coal mine areobtained.(2) Large cross-section roadway unsupported roof distance and deformationaround roadway is calculated.(3) Temporal and spatial variation law and therelationship and feature between them of large cross-section roadway heading facestress field, support stress field and mined stress field are obtained.(4) the affection ofhigh strength and high preload force to large cross-section roadway deformationaround roadway, stress distribution and plastic area distribution is concluded. And thefiled test of strengthened sides control technology was successful. There is importanttheoretical and practical significance of the research result to large cross-sectionroadway rock stability control.