Simulation Analysis of Coal Pillar Retention in the Southern Auxiliary Well Under the Influence of Paste Body Filling Mining
Due to the reserves of coal resources in the mine are drying up day by day,in order to extend the service life of the mine and ensure that paste body filling mining has no impact on the southern auxiliary shaft,the mine decides to adopt paste body filling mining technology.Under the premise of having no impact on the southern auxiliary shaft,part of the coal resources in the 33 mining area's Gongguang coal pillar are recovered.By implementing numerical simulation of the influence boundary values of various rock layers inside the rock mass,and referring to the surface rock movement observation and surface drilling rock movement observation results,the vertical section method adopts a comprehensive movement angle instead of the Quaternary 45° and bedrock movement angle to design the protective coal pillar for the shaft,which conforms to the movement law of coal seam bedrock and the Quaternary.The vertical section method and numerical simulation method are used to design and determine the protective coal pillar for the southern auxiliary shaft.According to the paste body filling mining face arranged by the protective coal pillar of the designed south auxiliary shaft,the deformation prediction of the probability integration method shows that there is no impact on the south auxiliary shaft after mining.
resource reservespaste body fillingdisplacement anglenumerical simulation
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