Principles and Applications of Exploitation of Coal and Pressure Relief Gas in Thick and High-Gas Seams

Abstract

The high-gas and low-permeability thick seams were studied, where exist some danger of coal-gas outburst and high gas inflow. Two kinds of exploiting models of coal-gas and the principles were proposed, with which some program has been made in practice. In the course of site investigation, the discharging deformation rule of distant upper rock stratums caused by seam mining was obtained; at the same time, the rule of pressure relief gas rush was tested.