Research on bolt-netting support under high stressed and fractured rockmass

ZHAO Xing-dong; TANG Chun-an; ZHANG Guo-lian; YU Yan-ping

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Research on bolt-netting support under high stressed and fractured rockmass

更新时间：2026-06-25

- Research on bolt-netting support under high stressed and fractured rockmass
- Vol. 27, Issue S1, (2006)
- 作者机构：
  
  1. 东北大学资源与土木工程学院,沈阳,110004
  2. 鲁中冶金矿山公司小官庄铁矿,莱芜,271113
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：15 December 2006，
  
  Published：2006
- 稿件说明：
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ZHAO Xing-dong, TANG Chun-an, ZHANG Guo-lian, et al. Research on bolt-netting support under high stressed and fractured rockmass[J]. 2006, 27(S1).
DOI：

ZHAO Xing-dong, TANG Chun-an, ZHANG Guo-lian, et al. Research on bolt-netting support under high stressed and fractured rockmass[J]. 2006, 27(S1). DOI：

摘要

通过研究传统新奥法充分利用和调动巷道围岩强度及其自身承载能力，依靠围岩支护共同作用原理来维护围岩的稳定性。对锚网支护作用机理进行研究，建立预应力锚杆的力学模型，发现高强预应力锚杆的锚固力与围岩性质、锚固方式、锚杆杆体和围岩应力等因素有关；同时分析了锚网支护与围岩共同作用机理，并应用FLAC对锚网支护机理进行研究，发现锚网支护与围岩形成压缩拱，依靠压缩拱来抵抗围岩应力，进而维护巷道围岩的稳定。通过在小官庄铁矿进行试验，在小官庄铁矿41联巷采用高强预应力锚网支护，取消喷射混凝土，巷道围岩变形量比较小，锚网支护能够维护高应力破裂岩体围岩的稳定，在同类矿山中具有推广应用价值。

Abstract

The traditional new Austrian tunneling method (NATM) is introduced. From the NATM we know that maintaining the stability of surrounding rockmass must fully utilize and mobilize the strength of surrounding rockmass and its carrying capacity

and depend on co-action mechanism of the surrounding rockmass and support. We study the mechanism of bolt-netting

and setup the mechanic model of high strength and prestressed bolt. We find that the anchor strength of high strength and stressed bolt is related to property of surrounding rockmass

the anchor mode

staff of bolt and the stress of surrounding rockmass

etc. Meanwhile we analyse the co-action mechanism of bolt-netting support and surrounding rockmass

and apply FLAC to study the mechanism of bolt-netting support

and find that the bolt-netting support and surrounding rockmass come into the compressing arch. The roadway depends on the compressing arch resisting the surrounding stress

and maintains the stability of the surrounding rockmass. The deformation and destruction of surrounding rockmass is very serious. By scene test at 41 connecting roadway in the Xiaoguanzhuang Iron Mine

the deformation of roadway is small; the bolt-neting support can maintain the stability of high-stress and fragmented rockmass. The bolt-netting support has the extending and applying value at the similar metal mines.

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