Abstract:
In order to solve the problem of low yield per unit and unbalanced proportion of mining, during the implementation of the full cover area measures for drilling and pumping through the bottom rock roadway, in Jiaozuo Mining Area with high gas, low permeability and single thick coal seam, the fine management of gas drainage is carried out based on “three-modernization and one-project”, supplemented with the safeguard measures such as drilling operation protection system, to further standardize gas drainage measures and improve the effect of gas control. At the same time of shortening the period of gas control, the goal of mine gas control is changed from “eliminating outburst in area” to “safe and efficient”. Through the verification in the 16 mining area of Guhanshan Mine, the driving rate of coal roadway is increased by 45%, and the working face capacity is increased by 85%.