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Fractured rock mass roadway combined active and passive support method

A combined support, active and passive technology, used in tunnels, earth-moving drilling, tunnel lining and other directions, can solve the problems of restricting the improvement of mining enterprise efficiency, high labor intensity, long construction period, etc., and achieve good support effect and construction period. The effect of short time and engineering materials saving

Inactive Publication Date: 2019-11-26
CHINA MINMETALS CHANGSHA MINING RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are generally disadvantages such as long construction period, high cost, and high labor intensity, which to a certain extent limit the improvement of mining enterprises' benefits

Method used

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  • Fractured rock mass roadway combined active and passive support method
  • Fractured rock mass roadway combined active and passive support method
  • Fractured rock mass roadway combined active and passive support method

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Embodiment Construction

[0027] The active and passive combined support method for broken rock mass roadway is further described below in conjunction with the accompanying drawings and embodiments:

[0028] (1) On-site observation of the development of ore-rock joints and fissures, to determine the thickness of concrete, and to arrange and mark the positions of the bolt holes;

[0029] (2) According to the calculation results, drill the surrounding bolt holes, and use resin bolts to fix them in the bolt holes through anchoring agents. The depth of the bolts entering the ore rock is 2-3m, and the bolts are exposed at a distance of 0.5-1m from the surface of the roadway. ;

[0030] Further, the length of the exposed roadway surface length of the bolt in the present invention usually depends on the design thickness of the roadway construction concrete, and can also be based on the diameter of the roadway constructed, the crushing degree and crushing strength of the rock mass to be maintained; at the same...

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PUM

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Abstract

The invention discloses a fractured rock mass roadway combined active and passive support method. The fractured rock mass roadway combined active and passive support method comprises the steps that the mine rock joint fissure fracture development condition is observed on site, the thickness of concrete is determined, and a drilling position of an anchor rod hole is arranged and marked; according to a calculation result, peripheral anchor rod holes are drilled, resin anchor rods are fixed into the anchor rod holes through an anchoring agent, the depth of anchor rods entering mine rock is 2-3m,and the anchor rods exposes from the surface of a roadway by 0.5-1m; steel wire meshes are inserted to exposed rod bodies of the anchor rods from being closely attached to the mine rock every other 0.1-0.2m in a penetrating mode, and at least more than two layer of steel wire meshes are formed; steel plates are fixed to anchor rod positions of the outer layers of the steel wire meshes from bottomto top, and meanwhile, geotechnical cloth is laid on the inner surfaces of the steel plates; during construction, the steel plates are fixed while the concrete is poured in surrounding space of the steel plates layer by layer until construction of a whole roadway cross section is completed; and the steel plates are connected and reinforced through steel bars between the longitudinal direction andthe transverse direction. The fractured rock mass roadway combined active and passive support method is simple in process, high in safety, and saved in engineering materials.

Description

technical field [0001] The invention relates to the technical field of underground mining engineering, and more particularly, to a combined active and passive support method for broken rock roadway suitable for broken rock roadway support. Background technique [0002] In the underground mining of metal mines, roadway engineering is the main engineering structure of the mine. Therefore, the underground roadway controls the economic lifeline of the entire mining enterprise, and good roadway quality is a favorable condition to ensure the economic benefits of the mine. At present, in mines with extremely developed joints and fissures, due to the poor quality of rock mass, the phenomenon of slats and roofs falling over in the roadway is easy to occur, which affects the normal production of the mine. [0003] At present, in view of the development of joints and fissures, layered and broken rock mass, mainly steel arches, bolts (cables), concrete prefabricated parts and other str...

Claims

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Application Information

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IPC IPC(8): E21D11/00E21D11/15E21D20/02E21D21/00E21D11/10
CPCE21D11/00E21D11/10E21D11/155E21D20/025E21D21/0093
Inventor 李强张海云李向东王亚军盛佳刘东锐万兵周益龙王玉丁张为星李士超
Owner CHINA MINMETALS CHANGSHA MINING RES INST
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