Method for anchoring coal mine tunnel bottom plate

An anchoring method and technology for coal mine roadways, which are applied in tunnels, tunnel linings, installation of bolts, etc., can solve problems such as repeated repairs of roadways, and achieve the effects of avoiding repeated repairs, saving labor, and low investment costs.

Active Publication Date: 2014-09-17
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an anchoring method for the bottom plate of coal mine roadway, which has simple procedures and convenient operation, optimizes the lithology of the bottom plate through grouting and prestressed anchor cables, improves the mechanical environment of the bottom plate,

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  • Method for anchoring coal mine tunnel bottom plate
  • Method for anchoring coal mine tunnel bottom plate
  • Method for anchoring coal mine tunnel bottom plate

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Embodiment Construction

[0039] see Figure 1-2 , has shown the anchoring method for coal mine roadway floor of the present invention.

[0040] The anchoring method for the bottom plate of the coal mine roadway comprises the following steps:

[0041] Step 1, digging a plurality of parallel anti-arch grooves 3 on the roadway floor;

[0042] Wherein, the reverse arched groove 3 is semi-elliptical and can be arranged perpendicular to the axis of the roadway. In some preferred embodiments, the width is about 300-500 mm.

[0043] Step 2: Set a plurality of anchor cable boreholes perpendicular to the arc of the bottom of the groove in the reverse arched groove 3, and lower the hollow grouting anchor cable 8 bound with the grouting pipe 7 in each anchor cable borehole And seal the hole, form a pressure-bearing arch structure through grouting and anchor cable prestressing, and set a braid at a distance from the orifice to seal the hole with cementitious material.

[0044] Wherein, when the anti-arched groo...

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Abstract

The invention discloses a method for anchoring a coal mine tunnel bottom plate. A pressure bearing arch structure is formed on the tunnel bottom plate through a bolt-grouting support to prevent the bottom of a tunnel from heaving, and the method is suitable for coal mine tunnel support engineering. The method comprises the basic steps that after tunneling is completed and top slope supporting is applied, inverted arch grooves perpendicular to the axis direction of the tunnel are dug in the tunnel bottom plate, grouting anchor cables perpendicular to an anti-arch arc are constructed in the grooves, the pressure bearing arch structure is formed within the interaction influence range of the anchor cables, arch feet of the pressure bearing arch structure act within the stabilization range of two edges of the tunnel, the function of shielding loads of the tunnel bottom plate can be achieved, and the deformation of the tunnel bottom plate can be effectively controlled.

Description

technical field [0001] The invention relates to a method for controlling the deformation of the bottom plate of a coal mine roadway, in particular to an anchoring method for the bottom plate of a coal mine roadway to avoid severe deformation of the bottom plate of a coal mine roadway. Background technique [0002] Roadway bottom heave, as a form of mine pressure manifestation, generally occurs in deep roadways, roadways with poor floor lithology and roadways affected by mining. A large number of measured data show that the bottom heave of the roadway can account for 2 / 3 to 3 / 4 of the approaching amount of the roof and floor of the roadway. At the same time, the stability of the floor significantly affects the deformation and damage of the two sides and the roof. If the bottom drum of the roadway is not effectively controlled, it will not only significantly increase the maintenance cost of the roadway, but also affect the normal production of the mine. At present, the method...

Claims

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Application Information

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IPC IPC(8): E21D11/00E21D20/02
Inventor 陈盼张幼振姚克邵俊杰李旭涛蔺志涛
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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