采矿与安全工程学报 ›› 2015, Vol. 32 ›› Issue (5): 735-740.

• 论文 • 上一篇    下一篇

采动影响大断面巷硐群加固机理及对穿锚索控制技术

  

  1. 1.河南理工大学能源科学与工程学院,河南 焦作 454003; 2.煤炭安全生产河南省协同创新中心,河南 焦作 454003
  • 收稿日期:2013-12-16 出版日期:2015-09-15 发布日期:2019-09-02
  • 作者简介:韦四江(1977—),男,河南省扶沟县人,副教授,从事深井巷道围岩控制及矿山岩石力学方面的研究。
  • 基金资助:

    国家自然科学基金项目(U1304517);河南省教育厅科学技术研究重点项目(13A440334);河南省高等学校青年骨干教师资助计划项目(2010GGJS-058);河南理工大学博士基金项目(B2012-077)

Reinforcement mechanism and control technology with two-ended cables of roadway and chamber groups influenced by mining

  • Received:2013-12-16 Online:2015-09-15 Published:2019-09-02

摘要: 采动影响下的高支承压力,造成鹤煤九矿 31 巷硐群软弱围岩发生蠕变破坏乃至返修,提出了深浅交错全断面注浆和对穿锚索的硐室围岩加固方法。采用相似模拟试验研究了该巷硐群在强支承压力作用下的失稳机理,试验表明:随着顶压增加,硐室两侧岩柱变形持续增加,其承载能力持续降低;对穿锚索的载荷先增加,而后呈现波浪状调整状态;对穿锚索对于增加岩柱表层压应力及其承载能力非常重要;窄岩柱承受了更高的支承压力,破坏更为严重,两帮锚固体表现为整体移近。工业试验表明,对穿锚索能够有效控制硐室帮岩柱和硐室围岩的稳定。

关键词: 巷硐群, 采动影响, 相似模拟, 破坏特征, 对穿锚索

Abstract: According to the problem of creep damage and reinforcement of roadway and chamber groups influenced by mining with high abutment stress and weak adjacent rock in Hebi 9th Colliery, strengthening method has been proposed, characterized with full cross-section, shallow-deep hole grouting and two-ended cables. The instability mechanism of roadway and chamber groups with high abutment stress has been studied by means of analogue simulation. The study has shown that as the top pressure increases, displacement of chamber rock pillar increases; bearing capacity of pillar decreases; loads of two-ended cables increases at first, then adjusts continuously in wavy shape. Two-ended cables are vital to the bearing capacity and compressive stress increase of wall surface. Narrow rock pillar is seriously damaged by high abutment stress. Overall movements happen in wall anchorage body. The industry tests have shown that the two-ended cables can effectively help to control the stability of pillar and adjacent rock.

Key words: roadway and chamber groups, mining affection, analogy simulation tests, damage character, two-ended cables