Borehole Drilling and Pressure Releasing Technology Applied to Mining Gateway Support in Three Soft Seam
Abstract：In order to effectively solve the support problems of the mine soft rock roadway, the borehole drill and pressure releasing and U type steel combined support method was provided and studied. The FLAC3D numerical simulation software was applied to study the function of the pressure releasing borehole to the surrounding rock deformation and stress migration mechanism of the mine roadway. The simulation results showed that after the pressure released borehole completed, the deformation value of the gateway surrounding rock was reduced, the stress peak of the surrounding rock along the gateway was moving forward to deep inside and the gateway was in the stress reduced area. The site test results showed that with the application of the borehole pressure released and U type steel combined support plan, the max convergence between the two sidewalls of the gateway was 193 mm and was reduced by 55%, the max convergence between the roof and floor of the gateway was 267 mm and was reduced by 55%. Thus the support conditions of the gateway were remarkably improved.
Keywords：support of mine soft rock roadwaymining gatewaypressure released boreholenumerical simulationsurrounding rock de- formation
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 29-32 )