高瓦斯矿井大断面煤巷沿空留巷技术研究与应用

doi:10.11799/ce201412019

煤炭工程 ›› 2014, Vol. 46 ›› Issue (12): 56-59.doi: 10.11799/ce201412019

高瓦斯矿井大断面煤巷沿空留巷技术研究与应用

高升

中煤科工能源投资有限公司

收稿日期:2014-04-09 修回日期:2014-03-05 出版日期:2014-12-12 发布日期:2014-12-10
通讯作者: 高升 E-mail:gaosheng1987@126.com

Study and Application on Gob-Side Entry Retaining Technology for Coal Roadway with Large Section in High Gas Mine

Received:2014-04-09 Revised:2014-03-05 Online:2014-12-12 Published:2014-12-10

摘要/Abstract

摘要：

本文以高瓦斯矿井屯兰煤矿大断面煤巷沿空留巷为研究对象，建立了沿空留巷围岩结构模型，分析了沿空留巷的变形特征和巷旁充填体的作用机制，提出了巷内基本支护采用锚杆索配合钢梁、金属网联合支护，巷旁采用混泥土膏体材料充填，以及充填体锚带网外加固、钢筋网内加固和注浆密封的沿空留巷围岩控制技术。井下实践结果表明：沿空留巷顶板离层最大值为40mm，顶底板移近量最大为17cm，两帮移近量最大值为25cm，工作面上隅角瓦斯浓度为0.45%～0.75%，巷道内瓦斯浓度为0.32%～0.68%，实现了高瓦斯矿井大断面煤巷沿空留巷技术的成功应用。

关键词: 高瓦斯矿井, 大断面煤巷, 沿空留巷, 膏体巷旁充填

Abstract:

In this paper, based on the gob-side entry retaining of large section coal roadway in high gas mine—Tunlan coal mine, it established the rock structure model of the gob-side entry retaining, and analyzed the deformation characteristics of the gob-side entry retaining and the mechanism of action of filler mass beside roadway, as well as proposed the leaving rock control technology of gob-side entry retaining, which included the basic support by using anchor cable combined with steel beams and metal mesh, concrete paste filling material supporting the roadway side, anchor belt net strengthening outer the filler mass, steel mesh strengthening within the filler mass and grouting seal. The site practice results of gob-side entry retaining showed that, maximum of roof separation was 40mm, maximum moving amount between the roof and floor was 17cm, gas concentration at the upper corner of the face was 0.45%~0.75%, gas concentration in the roadway was 0.32%~0.68%, which achieved successful application of gob-side entry retaining of large section coal roadway in high gas mine.

Key words: High gas mine, Coal roadway with large section, Gob-Side Entry Retaining, Paste roadside Packing

中图分类号:

TD353

罗中. 高瓦斯矿井大断面煤巷沿空留巷技术研究与应用[J]. 煤炭工程, 2014, 46(12): 56-59.

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高瓦斯矿井大断面煤巷沿空留巷技术研究与应用

Study and Application on Gob-Side Entry Retaining Technology for Coal Roadway with Large Section in High Gas Mine

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