High Pressure and Low Permeability Physics Model on Coal and Gas Outburst

摘要

There is little chance for investigation and research in the site of working place, so physics experiment in laboratory become the main method of the explore and study on the subject of coal and gas outburst. The physics model of gas stream stopper under high stress can be confirmed by the relationship between the abutment stress and the gas pressure, and the physics experiment equipment of coal and gas outburst is made in laboratory, and abundant experiments are carried out. The result shows that the physics essence of coal and gas outburst is the gas erupting under the high pressure .And the designed loading system of ballonet faithfully reappears the fact of gas stream stopped under high stress in soft coal seam and erupted. The measure of preventing coal and gas outburst can be designed efficiently by the result of physics experiments in laboratory.