Pressure Releasing Groove Applied to Floor Heave Control of Mine Sof t Rock Roadway
HAO Jian-bin
WEI Wei
DONG Chang-long
Abstract：In a construction mine of Qitai No.1 mine ,a main mining seam was B3 seam ,a thickness of the seam was about 22m and a depth of the seam was 518~540m. A mine central auxiliary transporta‐tion roadway was headed along the seam floor. The seam floor was an ultra soft rock ,could be easily swelled with water and would cause a floor heave phenomenon.After the mine roadway headed ,the floor would be soon heaved ,the heave speed was fast and an average floor heave speed was 10mm/day. A previous conventional method with a site pouring concrete floor was applied to control the floor heave and the method was not success.Late ,according to the certain condition ,a pressure releasing groove was excavated in the middle of the mine roadway ,a reverse floor arch support method was ap‐plied to control the floor heave and excellent effect was obtained. Thus a new experience was provided to the floor heave control of the mine soft rock roadway.
Keywords：mine soft rock roadwayfloor heavepressure releasing groovereverse floor archcontrol
Publication Date：2014-09-18
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 30-32,7 )