The invention discloses an experimental device for the
coal and gas burst, comprising a
coal sample chamber and an
atmospheric pressure loading device, wherein the
coal sample chamber is provided with coal and gas exhaust nozzles having
control valves, the
atmospheric pressure loading device is provided with an
atmospheric pressure loading channel that communicates with the inside of the coal
sample chamber having a diaphragm in front of the
control valves, and a cavity between the diaphragm and the
control valves is a balancing cavity connected with a balanced atmospheric pressure loading device; the device also comprises a pressure acquisition device in the coal sample chamber and a camera arranged outside the coal sample chamber and the part of the coal sample chamber opposite to the camera is transparent. The invention is capable of simulating the pressure of gas and physical force of coal, achieving the instant fast
pressure release to be closer to the actual coal and gas burst and the damage process of coal, and observing and recording the
simulation to provide the theoretical foundation of forecasting and preventing the coal and gas burst; during the use, the grain diameterof powdered coal, pressure while the formation and charging pressure can be regulated to observe the grain
diameter parameters of different powdered coals and the experimental result under different pressures, and the device is flexible in use.