Research And Application Of Overmining In Qianjiaying Coal Mine

Coal is the main energy of our country, and it is non-renewable energy. With the increasing tension of coal resources, the safe and efficient recovery of the upper part of the coal resources has become a considerable numbers of the problems. Thus, study on overmining has great significance on the safety, the volume of the liberation of slack coal, reduce the waste of resources, extend the mine life and accelerate the energy building and the protection of social stability.Based on the 1357 and 1358 panel of the QianJiaYing coal mine in this paper, using the theoretical analysis, numerical calculation and similar material simulation to research the movement and deformation of overburden and the influence of coal mining on spatial and time. Making sure of that the factors of height, interburden spacing, overburden structure, time and so on which effect overmining and the comprehensive effect, it provide theoretical support and technical support for secure overmining. We can draw a conclusion that the change of lower seam angel, roof and floor and pressure on roadway and panel of upper seam by the success of overmining on 1357 panel. Based on the above conclusions and experiences, we design 1358 panel.