冀家垴风井车场巷道变形破坏分析及支护对策

杨　勇

冀家垴风井车场巷道变形破坏分析及支护对策

杨　勇

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出版历程
- 发布日期: 2021-04-19

Analysis on deformation and failure of Jijianao ventilation shaft roadway and supporting countermeasures

YANG Yong

摘要

摘要: 为解决新元矿冀家垴风井车场巷道的大变形问题,研究了风井车场巷道围岩的性质,系统分析了风井车场巷道的变形破坏模式,提出了优化巷道断面结合钢管混凝土支架+锚杆的复合支护方案,运用FLAC3D对比分析了2种支护方案下的巷道变形破坏特征,并将钢管混凝土支架复合支护方案进行了现场应用。研究结果表明:在原支护方案下顶板下沉量达1 100 mm,两帮收敛量达700 mm,断面收缩率为25%~29%;巷道围岩岩性差、频繁的动力扰动、支护强度低导致了风井车场巷道的大变形;采用钢管混凝土支架复合支护方案后,风井车场巷道围岩控制较好,顶板下沉量为45~55 mm,两帮变形量为25~35 mm,保证了风井车场巷道的正常使用。
- 风井车场巷道 /
- 大变形 /
- 钢管混凝土支架 /
- 巷道支护 /
- 围岩控制
Abstract: In order to solve the problem of large deformation of Jijianao ventilation shaft roadway in Xinyuan Mine, the nature of the surrounding rock of the ventilation shaft roadway was studied. The deformation and failure mode of the roadway was systematically analyzed. The composite supporting scheme of concrete-filled steel tube support and anchor is proposed. And the deformation and failure characteristics of the roadway under the two supporting schemes were analyzed by FLAC3D. In addition, the concrete-filled steel tube support scheme was tested in field. The research results show that under the original support scheme, the roof sinking amount is up to 1 100 mm, the two sides convergence is up to 700 mm, and the section shrinkage rate is 25% to 29%. The poor lithology of the surrounding rock of the roadway, frequent dynamic disturbances, and low support strength lead to large deformation of the ventilation shaft roadway. After using the concrete-filled steel tube support composite support scheme, the surrounding rock of the ventilation shaft roadway is controlled well. The sinking amount of the roof is 45-55 mm, and the deformation of the two sides is 25-35 mm, which ensures the normal use of the ventilation shaft roadway.
- ventilation shaft roadway /
- large deformation /
- concrete-filled steel tube support /
- roadway support /
- surrounding rock control

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参考文献(21)

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