Application of Gas Extraction Technology in Soft and Low Permeability Coal Seams
In order to effectively solve the problem of gas surface extraction in soft and low permeability coal seams of Xinyuan Coal Mine,the application research of ultra-high pressure hydraulic seam cutting and permeability enhancement technology was carried out.The COMSOL-Multiphysics simulation software was used to determine the effective extraction radius,identify the reasons for the difficulty in ground extraction,and determine the use of ultra-high pressure hydraulic cutting and permeability enhancement technology.The ultra-high pressure hydraulic cutting device and ultra-high pressure hydraulic cutting process were explained.The practical application results show that compared with ordinary drilling gas extraction technology,using ultra-high pressure hydraulic slotting and permeability enhancement technology for gas extraction significantly improves the volume fraction and pure quantity of extraction.The volume fraction of extraction is 2.24 times that of ordinary drilling extraction,and the pure quantity of extraction is 2.61 times that of ordinary drilling extraction.The application of ultra-high pressure hydraulic slotting and permeability enhancement technology effectively solves the difficulty of gas extraction in the soft and low permeability coal seam of 307 working face of Xinyuan Coal Mine.
soft and low permeability coal seamgas extractionnumerical simulationhydraulic slotting
万方数据
维普
