Numerical simulation study on the pressure relief effect of directional long borehole in mining face
Pressure relief borehole technology is a safe and efficient means of pressure relief by changing the stress state of surrounding rock and controlling the deformation of the roadway.No.402 mining face of Tingnan Mine was taken as an example,on the basis of the original decompression borehole scheme,the decompression and anti-punching arrangement scheme of directional long borehole was proposed.The numerical model was established by FLAC3D software,and the pressure relief effects of the three schemes were compared from the perspectives of vertical stress and plastic zone.The analysis showed that the pressure relief effect of ordinary directional long borehole was almost the same as that of the original pressure relief scheme,and the additional directional long borehole in the high stress concentration area could get better pressure relief effect,which provided an effective measure for pressure relief of anti-scour in mining face.
directional long boreholesborehole pressure reliefnumerical simulationmining face
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