The invention discloses a
coal body permeability characteristic testing
system. The
coal body permeability characteristic testing
system comprises an electronic
universal testing machine, a permeability characteristic testing device, a vibration detecting device, a first gas
system, a confining pressure hydraulic system and a computer, wherein the permeability characteristic testing device consists of a lane simulating mechanism and a lane ambient environment simulating mechanism; the lane simulating mechanism comprises a baffle, a breathable plate, a
coal rock sample and a U-shaped clamping sleeve; the lane ambient environment simulating mechanism comprises a base, a cylinder tube, a lower pressing head, an upper half
concave surface pressing head, an upper half convex surface pressing head and a
piston; the first gas system comprises a first gas tank, a first
pressure reduction valve and a first
gas pressure meter; the confining pressure hydraulic system comprises a confining pressure
liquid tank, a
hydraulic pump, a unidirectional valve, a confining pressure hydraulic meter and a confining pressure liquid overflow valve. The invention also provides a coal body permeability characteristic testing method. According to the coal body permeability characteristic testing system and method, the
axial pressure, the confining pressure and the
methane gas pressure are controllable, the gas permeability characteristics influenced by disturbance of a lane coal
rock body and a coal mine deep part coal
rock body can be tested, and the testing precision is high.