摘要
通过分析影响沿空留巷围岩稳定因素,确定沿空留巷无煤柱开采方案,采用超前预裂切缝、顶板补强支护、巷旁挡矸防护以及滞后临时支护工艺,减小了顶板的下沉量,保证留巷效果,在沿空留巷215 m范围内进行监测显示,巷道的整体稳定性得以提高。
By analyzing the factors affecting the stability of surrounding rock in the goaf,the paper determines the mining scheme without coal pillar in the goaf.The technology of pre crack cutting,roof reinforcement support,gangue protection by the roadway and delayed temporary support technology are adopted to reduce the subsidence of roof and ensure the effect of retaining roadway.The monitoring results within 215 m of the goaf remain roadway show that the overall stability of the roadway can be improved.
作者
张晓斌
Zhang Xiaobin(Jinhuagong Coal Mine of Jinneng Holding Coal Group,Shanxi Datong 037000)
出处
《山东煤炭科技》
2021年第6期13-14,17,共3页
Shandong Coal Science and Technology
关键词
沿空留巷
预裂
支护
gob side entry retaining
presplitting
support
