Development and realization of a coal and gas outburst simulation device
Abstract
Similar coal and gas outburst simulation devices both at home and abroad are analyzed and the advantages and disadvantages of them are gained. A large size experimental device of coal and gas outburst simulation is developed based on the congeneric testing device. This device consist of coal and gas outburst model system, gas injection system, loading system, stress measurement system, gas pressure measurement system, temperature measurement system, electromagnetic radiation testing system and high-speed photography system. The functions of the device are as following. (1) To study laws of roof break development and stress evolution during outburst process by simulating coal seam, roof and floor with similar material. (2)To simulate stress distribution of roof at high strength springs of different sizes. (3)To realize the uniform adsorption in coal by 3 gas injection pipes that pre-buried. (4) To induce coal and gas outburst at predetermined gas pressure by blasting bursting disc instantly that set on the outburst hole. (5) To observe and record fracture and migration process of coal in the cavity during outburst that is achieved by a visual glass window on the side of cavityReferences
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