DOI: 10.11799/ce201611015
Numerical analysis and application of coal pressure relief effect with drillings in roadway
LI Yue-wen
LIU Sai
CAO An-ye
HUANG Xian-cheng
GU Yu
Abstract：By using FLAC2D , the influence of different drilling diameter, drilling distance and burial depth to drilling pressure relief has been simulated in this paper. It can be proved that: ①With the drilling pressure relief, stress concentrated in the left and right sides, the stress around the drilling especially in the upper and lower part. Meanwhile, larger drilling diameter means better pressure relief effect and larger destruction area around the drilling. Smaller distance of drilling also means better pressure relief effect, when the distance increases to a certain degree, the pressure relief area and intensity will maintain. ②Under the same drilling diameter and small drilling distance to relieve coal pressure, the height of the pressure relief zone are the positive proportion relation to coal seam depth. With the increase of the drilling distance, the height of the pressure relief zone is not changed with the depth, basically tends to the same height. ③With the same drilling parameters, greater coal seam depth means better pressure relief effect. To better prevent rock-burst, reasonable drilling parameters shall be chosen for coal seams with different buried depth.
Keywords：pressure relief of coaldepthsdrilling diameterdistance between drillingsnumerical simulation
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 50-53 )