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Abstract The mechanism of intensive venting pulverized coal to prevent coal burst was studied through laboratory tests and numerical simulation. The methods of determining the parameters such as the spacing and diameter of boreholes and controlling the coal burst were presented. It is found that the main functions of the spacing of boreholes for coal burst control is a function of borehole diameter，coal thickness，spill-over coefficient，is positive correlated with the spill-over coefficient or the borehole diameter，and is negative correlated with the coal seam thickness or the safe-raising deformability. The intensive venting pulverized coal applied at the stage of pre-depressurizing is to reduce the elastic modulus and raise the deformability and at the stage of relieving danger is to absorb the energy and increase the resistance. The ideas are applied to working front of number 1302 of Xinjulong Mine with a good result.
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Received: 03 June 2013
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2014, Vol. 33 
