Full-section closed-type deep-shallow coupling yielding anchoring and grouting support method for broken soft rock roadway

A full-section, closed technology, used in tunnels, tunnel linings, earthwork drilling, etc., can solve the problems of high cost, neglecting the control of deep fissure expansion in the surrounding rock, complicated procedures, etc. The ability to resist deformation of surrounding rock and the effect of wide damage range

Inactive Publication Date: 2017-07-14
CHINA UNIV OF MINING & TECH
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Problems solved by technology

This method has a significant control effect on the shallow surrounding rock failure forms such as roof fall, slab, and floor drum in the complex fault fracture zone, but it ignores the control of deep crack expansion in the surrounding rock, and is not suitable for wide range of deformation damage and long duration. roadway surrounding rock, and the method is complex and costly

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  • Full-section closed-type deep-shallow coupling yielding anchoring and grouting support method for broken soft rock roadway
  • Full-section closed-type deep-shallow coupling yielding anchoring and grouting support method for broken soft rock roadway
  • Full-section closed-type deep-shallow coupling yielding anchoring and grouting support method for broken soft rock roadway

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Embodiment Construction

[0051] The technical scheme of the present invention will be further described below in conjunction with the accompanying drawings and taking a certain mine as an example.

[0052] The full-section closed-type deep-shallow coupling yielding anchoring and grouting support method of broken soft rock roadway, the specific steps are as follows:

[0053] Step 1): After the roadway is excavated, bolt holes are drilled on the full section of the roadway, and high-strength prestressed anchor bolts 1 are installed. The metal mesh is laid out in a right-angled way to cross the reinforcement ladder 3. The metal mesh is welded by steel bars with a diameter of 6mm, the specification is 2000×1000mm, and the mesh size is 100×100mm. Welding process; install the anchor pallet, the pallet passes through the anchor rod to press the steel ladder 3, and makes its pre-tightening force reach 80kN.

[0054] Step 2): After the installation of the full-section high-strength prestressed anchor rod 1 is...

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Abstract

The invention relates to a full-section closed-type deep-shallow coupling yield pressure anchor grouting support method for broken soft rock roadway. The pressure-reinforced arch, the full-section closed grouting reinforcement ring and the deep grout diffusion reinforcement arch, the suspension effect of the high-strength grouting anchor cable will combine the four to form a multi-level effective composite arch, which will support the pressure, anchor and grouting The organic combination of the advantages of deep-shallow coupling support has significantly improved the bearing range, integrity and bearing capacity of the support structure. The deformation characteristics such as pressure around the rock and obvious bottom drum have outstanding control effects, and can effectively control various deformations of the surrounding rock of the broken soft rock roadway. It is especially suitable for deep mine large-section broken soft rock roadways. The cost is low, and it has high on-site promotion and application value.

Description

technical field [0001] The invention relates to a combined anchoring and grouting support method for a coal mine roadway, in particular to a full-section closed-type deep-shallow coupling pressure anchoring and grouting support method for broken soft rock roadways with large deformations in deep wells, and belongs to the field of coal mine roadway support. Background technique [0002] With the depletion of shallow coal resources in my country, the depth of coal mining is extending to the deep at a rate of 8-12m / a. The geological occurrence environment of deep coal resources is extremely complex. During the excavation of deep mine roadways, it is inevitable to pass through unfavorable geological bodies such as fault fracture zones and weak rock formations. The roadway deformation and damage are very strong, and support control is very difficult, which seriously affects the safety and security of the mine. production construction. [0003] The deformation and failure of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00E21D11/10C04B28/02C04B14/02C04B14/06
Inventor 王连国陆银龙蒋邦友张晓东
Owner CHINA UNIV OF MINING & TECH
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