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Construction method and structure of mining tunnel under poor geological conditions through surrounding rock

A technology for geological conditions and tunnel construction, applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems of poor supporting effect of small conduits and inability to ensure construction safety, etc., to improve the effect of advanced support, ensure construction safety and safety. Construction quality, the effect of ensuring construction quality

Active Publication Date: 2017-06-13
SHANGHAI MECHANIZED CONSTR GRP
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  • Claims
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Problems solved by technology

However, when encountering a V-shaped funnel with a large span (the filling is mostly fragmented rocks such as limestone and diabase with a strong degree of weathering and artificial backfill), the advance support effect of the small conduit is poor, and the construction can not be guaranteed. Safety

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  • Construction method and structure of mining tunnel under poor geological conditions through surrounding rock
  • Construction method and structure of mining tunnel under poor geological conditions through surrounding rock

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Embodiment Construction

[0022] The construction structure of the mining method tunnel proposed by the present invention under the poor geological conditions of the surrounding rock will be further described in detail in conjunction with the accompanying drawings and specific embodiments. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0023] combine Figure 1 to Figure 2 , the present embodiment discloses a mining method tunnel construction structure under poor geological conditions through the surrounding rock. 3 The external insertion angle of 5-15° is set within the range of 120-150° of the arch of the proposed tunnel 4, the circumferential distance is 250-350mm, the length of each steel pipe 3 is 6-18m, and each steel pipe 3 is left 1m exposed and exposed The lower end of each steel pipe 3 is installed with a flange for preven...

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Abstract

The invention discloses a mining method tunnel construction method and structure through which a tunnel can penetrate through surrounding rock poor in geological condition. The surrounding rock is provided with a large-span V-shaped funnel. The structure comprises a pipe shed, a plurality of steel pipes with the external inserting angle being 5-15 degrees are arranged within the 120-150 degree range of an arch part of the tunnel planned to be constructed, the annular interval is 250-350 mm, each steel pipe is 6-18 m long, each steel pipe is exposed by 1m, the exposed lower end of each steel pipe is provided with a flange for preventing slurry from leaking outside after grouting ends, the upper end of each steel pipe stretches into the surrounding rock on the other side of the V-shaped funnel after passing the surrounding rock on one side of the V-shaped funnel and the space of the V-shaped funnel, and slutty outlet holes are evenly distributed in the portion, located in the space of the V-shaped funnel, of each steel pipe and pipe segments in the surrounding rock on the two sides of the V-shaped funnel. Through the method and structure, a good advanced supporting effect can be achieved, it can be guaranteed that the tunnel safely penetrates through the geological section, and construction safety and construction quality are effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and mainly relates to a mining method tunnel construction method and structure under poor geological conditions of crossing surrounding rocks. Background technique [0002] The mining method tunnel construction is an underground excavation project, mainly using the drill and blast method to excavate the tunnel. Due to the complex surrounding rock conditions, there may be hidden caves and cracks, so it is necessary to check the face of the tunnel before excavation (the tunnel face is A term in tunnel construction, that is, the working face where the excavation tunnel is constantly advancing, not a fixed surface) to conduct advanced detection in front of it, to grasp the geological conditions in advance, and to implement advanced small conduit support measures. [0003] However, when encountering a V-shaped funnel with a large span (the filling in the funnel is mostly fragmented rocks s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10E21D11/14
CPCE21D9/002E21D11/10E21D11/14
Inventor 郭争辉葛德明黄瑜
Owner SHANGHAI MECHANIZED CONSTR GRP
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