综采工作面回撤通道顶板支护技术

综采工作面进入末采阶段时,必须施工回撤通道,为多功能车运输和设备回撤预留足够的空间需求作准备.黄陵矿业一号煤矿综采工作面回撤液压支架、采煤机、刮板运输机一般需要13～16 d.长时间的作业施工必须保证回撤通道顶板的足够稳定和设备回撤后采空区顶板的正常垮落,才能确保作业人员的人身安全,促进设备回撤工作的顺利完成.做好以上...

Roof support technology of withdrawal channel for fully mechanized mining face

When the fully mechanized working face enters the final mining stage,it is necessary to construct the withdrawal channel to reserve enough space for the multi-function vehicle transportation and equipment withdrawal.It generally takes 13-16 days to withdraw hydraulic support,shearer and scraper conveyor in fully mechanized working face.In order to ensure the personal safety of operators and promote the smooth completion of equipment withdrawal,it is necessary not only to ensure the support quality of the roof of the withdrawal channel,but also to ensure the normal collapse of the roof after the support withdrawal.It is particularly important to do a good job in the support of the withdrawal channel.This paper introduces the support mode,method and actual use of the withdrawal channel of fully mechanized working face in No.1 coal mine,which can provide construction reference for the end mining support operation of fully mechanized working face in similar mines.