Patent AU-2022453302-A1 (AU)
Title: Impact-prevention pressure-relief tunneling method for rock burst coal seam roadway
Inventor: PAN JUNFENG
IPC: E21C37/12
Filed: 2022-11-01
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(54) Title: IMPACT-PREVENTION PRESSURE-RELIEF TUNNELING METHOD FOR ROCK BURST COAL SEAM ROAD
WAY 
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A f104 4A ai 14tUl A 9 Y), ik~4 S102 Determine, in an area to be tunneled of a coal seam 
4 f&t , fN4%th , S102 roadway, a fracturing target horizon satisfying a preset 
4 L t4t Rcondition, and determine the number of directional 
drilling holes according to the number of layers of the 
fracturing target horizon 
S104 Arrange a drill site in the coal seam roadway, construct a 
-4 i A 14 , /A tt lb 4* N6 R El 4t directional drilling hole from the drill site to the fracturing 
& ti, kt tt ~t i S104 target horizon, and fracture the constructed directional 
drilling hole 
S106 Continue tunneling the coal seam roadway, if the length 
of a fracturing coverage area of an overlying top plate 
1 remains a preset length, arrange the drill site again, 
construct a directional drillinghole from the drill site 
9ik4,AAr_i-1~i, A T K hrt,&Rt1 ;iI arranged again to the fracturing target horizon, and 
P W-i ~±, k M4, AL4kiii / S106 fracture the constructed directional drilling hole 
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(57) Abstract: The present invention provides an impact-prevention pressure-relief tunneling method for a rock burst coal seam road
way, comprising: determining, in an area to be tunneled of a coal seam roadway, a fracturing target horizon satisfying a preset condition, 
and determining the number of directional drilling holes according to the number of layers of the fracturing target horizon; arranging 
a drill site in the coal seam roadway, constructing a directional drilling hole from the drill site to the fracturing target horizon, and 
fracturing the constructed directional drilling hole; continuing tunneling the coal seam roadway, if the length of a fracturing coverage 
area of an overlying top plate remains a preset length, arranging the drill site again, constructing a directional drilling hole from the 
drill site arranged again to the fracturing target horizon, and fracturing the constructed directional drilling hole.  
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