Abstract: In view of the small working space, poor working environment and limited equipment capacity, the existing hydraulic fracturing and aggregate antireflection technology can not be directly used in the coal mine. The emulsion pump commonly used in the working face, combined with the high-pressure aggregate bin, high-pressure pneumatic control valve, etc., were used to carry out hydraulic fracturing of two floor through layer boreholes in Pansan Coal Mine, Huainan mining area Field test of adding aggregate to enhance the permeability. The test aggregate is 20～40 mesh ultra-low density polymer. The length of fracturing section of two boreholes is 6.8m and 6.1m, and the amount of injected aggregate is 110.25kg and 176.5kg respectively. After the completion of the construction, the test results were investigated. The pure gas drainage volume of 100 boreholes is 2-15 times of that of conventional unfractured boreholes. Under the same aggregate type and specification, increasing the proppant proportion is helpful to improve the fracturing permeability increasing effect.