矿业科学学报2026，Vol.11Issue(2)：457-466,10.DOI:10.19606/j.cnki.jmst.2026021
煤矿深孔定向爆破切顶卸压技术与应用
Deep-hole directional blasting for roof cutting and pressure relief in coal mines and its applications
摘要
Abstract
This study proposes a deep-hole directional blasting technology based on polymer energy charge packages for roof cutting and pressure relief as a solution to difficult roadway support and poor stability of coal pillars due to high pressure of composite roof plate in thick coal seams.Specifically,we probed into the control mechanism of polymer energy charge packages on the redistribution of stress field in surrounding rocks through theoretical analysis and analyzed how varying blasting parameters af-fect fracture penetration through LS-DYNA numerical modelling.The 15115 working face of a mine was taken for analysis to optimize key parameters such as borehole depth,spacing,roof cutting height,charge volume and charge structure,coupled with on-site industrial experiments and evaluation of pres-sure relief.After the blasting of polymer energy charge packages on the roof of the mining area,explo-sive energy was preferentially released in the direction of polymer energy.With identical charges,it generated main fractures that were significantly longer compared to that in the non-polymer energy di-rection,with a length ratio of 4.2∶1.0.The maximum displacement of the top and bottom plates in the adjacent roadway was reduced by 82%in the pressure-relieved section than that in the non-pres-sure-relieved ones.In the roof cutting roadway,the average compressive strength of the rock mass was reduced by 27%in the direction of polymer energy compared with that in the direction perpendicular to the polymer energy.Results verified the validity of the proposed technology for its effective directing of fracture expansion along the preset path,which significant reduced the length of the roof plate overhan-ging the roof and the collapse of the rotary extrusion on the coal column pressure.This study therefore offers references for controlling roadway stability under complex,high-stress geological conditions in deep mines.关键词
深孔爆破/切顶卸压/聚能药包/定向/断裂控制Key words
deep-hole blasting/roof cutting and pressure relief/polymer energy charge package/di-rection/fracture control分类
矿业与冶金引用本文复制引用
张召冉,宁佳昊,邓燕华,李俊涛,陈建伟,马佳豪..煤矿深孔定向爆破切顶卸压技术与应用[J].矿业科学学报,2026,11(2):457-466,10.基金项目
北京市教育委员会科技计划项目(KM202110009008) （KM202110009008）
