The invention discloses a comprehensive experimental device for the
coal and gas burst, comprising a
coal sample chamber, a terrestrial stress
simulation loading
system and an
atmospheric pressure loading device, wherein the terrestrial stress
simulation loading
system is provided with a force applying
capsule and a loading device in a sealed container, the
atmospheric pressure loading device is provided with an
atmospheric pressure loading channel that communicates with the wall interlayer of the
capsule, the loading device comprises at least two loading blocks, the
coal sample chamber is enclosed by the loading blocks between which a gap is arranged, and the force applying
capsule is sleeved at outside of the coal
sample chamber. According to the experimental result observed by a pressure acquisition device and a camera, the invention is capable of simultaneously inspecting the actions of the
gas pressure and terrestrial stress in the
initiation, start and development of the coal and gas burst through the
simulation of coaction of the terrestrial stress and atmospheric pressure to provide the theoretical foundation of forecasting and preventing the coal and gas burst; during the use, the pressure value is capable of being regulated to observe the experimental results under different pressure and the simulation of terrestrial stress or
gas pressure only, so that the device is flexible in use.