The invention relates to an apparatus and a method for rapid determination of parameters of residual gas on a mining working face of an underground
coal mine. The determination apparatus is provided with a
coal sample tank; a
pneumatic motor is arranged at the lower part of the
coal sample tank; a rotating shaft is mounted on the upper part of the
pneumatic motor; a crushing cutter head is installed at a side surface of the rotating shaft; the upper part of the coal sample tank is communicated with one end of a gas-
guide tube, and the other end of the gas-
guide tube is connected with a high precision pressure gauge; a gas stop valve is arranged at a joint position of the gas-
guide tube and the coal sample tank; the side surface of the gas-guide tube is communicated with an interface of a three-way angle valve through a connection flexible
pipe, and the other two interfaces of the three-way angle valve are respectively communicated with the bottoms of
burette I and
burette II through connection pipes. The determination method comprises the following steps: determination of curves representing the relationship between different balance pressures during adsorption of
methane by coal and
desorption quantity and the relationship between the different balance pressures and
methane content; determination of desorbable gas quantity on the working face and calculation of content, pressure and expansion energy of residual gas on the mining working face. The determination method for residual gas on the mining working face has the advantages of a short period of time, small
workload and high reliability of determination results, provides multi-parameter determination indexes for prediction of prominent dangers and examination of outburst prevention effects and has significant meaning to development of outburst prevention technology on a working face.