关键词: 综采工作面, 动压区, 回撤通道, 施工方案, 支护技术

Abstract: Based on the technical problems of large surrounding rock stress，serious surrounding rock fragmentation and high failure rate of roof support during the combined mining of 8127 working face in Majiliang mine，through comparative analysis，it is decided to adopt the self forming roadway construction technology for the withdrawal channel of the working face，and adopt the combined support technology of “blasting pre splitting and pressure relief + flexible fiber mesh + anchor cable steel belt”for the withdrawal channel. From the practical application effect，the self forming roadway construction technology adopted in the withdrawal channel reduces the quantities of roadway excavation in the working face，reduces the impact of dynamic pressure disturbance on the surrounding rock of the withdrawal channel in the high stress area.Through field observation，it is found that combined support technology controlled the roof subsidence of the withdrawal channel is below 0.15 m，and the side roof of the gob of the roof cutting line has achieved all collapse，and remarkable application results have been achieved.

Key words: fully mechanized face, dynamic pressure zone, retraction channel , construction scheme, support technology