Research on supporting technology of driving roadway under the old empty roadway
Due to the previous rough mining of small coal mines,the old roadways and old goafs left behind may exist in different layers near the coal seams,which can seriously affect and destroy the integrity of the roof of its lower coal seams.During the mining process of old kiln,it will destroy the the coal seam roof below the newly dug roadway,thus causing the fissures and joints of the roof of the lower coal seam to be more developed,which will not be easy to control the roof,and accidents of roof leakage will occur in the process of the excavation of roadways,and even large roofing accidents will occur,which will make it very difficult to maintain the roof of the roadway and bring many safety hazards to the coal mine safety production.According to the influence of the old empty roadway on the stability of the roadway to optimize the new driving roadway layer,in view of different empty roadways and empty areas,based on FLAC finite differ-ence method,numerical simulation analysis of roadway support was analyzed,the corresponding roadway supporting program was adopted to ensure the safe and efficient driving of coal resources in the first mining area of the mine,effectively solving the stability problem of roadway supporting in a certain mining area.
small mining damage areagoafsafety and efficiencyroadway supportingnumerical simulation
万方数据
维普
