Research on application of precise directional presplitting cracks and cutting seam pressure relief technology in roof of No.1102 working face
Wei Chen
Cheng Tan
Abstract：In order to reduce the impact of mining pressure on adjacent roadway No.1103 track roadway in No.1102 working face,the roof precise directional presplitting cracks and cutting seam technology was adopted to implement pressure relief management.By stud-ying the principle of pressure relief,internal explosion load of rock mass,impact range of shock wave,and key construction parameters,reasonable parameters were determined,and actual measurements were conducted to compare the top cutting section and the non top cutting section.Through actual testing,it has been shown that the maximum displacement of roof and floor after top cutting has de-creased by 389 mm,and the displacement of two sides has decreased by 399 mm.The anchoring force of sampled anchor rods has in-creased by 13-14 kN,and the overall pass rate has reached 92％.The control effect of surrounding rock after top cutting is significant.
Keywords：pressure relief of roofpresplitting cracks and cutting seammanagement of goafcontrol of surrounding rock
Publication Date：2025-10-30
Online Publishing Date：2025-11-27(First online date of this platform, not the publication date of the document)
Pages：5( 192-196 )