Research on Control Technology of Cutting Top and Unloading Surrounding Rock in Composite Hard Roof Panel Roadway
Taking the transportation channel 9807 in Feicheng Baizhuang Coal Mine as the research object,the deformation characteristics of the surrounding rock of the composite hard roof slab roadway were analyzed through on-site survey.Based on the control principle of the composite hard roof slab roadway,a collaborative control technology of"long anchor cable+deep hole pre cracking blasting"was proposed to optimize the stress environment of the roadway surrounding rock and suppress the damage of the anchoring structure.The on-site practice results show that after adopting this collaborative control technology,the maximum settlement of the roadway roof is 34 mm,and the maximum convergence of the two sides is 59 mm,achieving effective control of the surrounding rock of the composite hard roof roadway.
hard top platedeformation characteristicslong anchor cabledeep hole pre splitting blastingeffective control
NETL
NSTL
万方数据
