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The Method of Reducing the Strain of the Surrounding Rock of the Roadway Inside the Slope

A roadway and slope technology, which is applied in earthwork drilling, wellbore/well parts, special data processing applications, etc., can solve the problems of long construction period, large amount of engineering, and difficult deformation control technology, and achieves convenient and easy implementation. The effect of implementation

Active Publication Date: 2020-09-29
ANSTEEL GRP MINING CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The above methods often have disadvantages such as large engineering volume, long construction period, and difficult deformation control technology.

Method used

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  • The Method of Reducing the Strain of the Surrounding Rock of the Roadway Inside the Slope
  • The Method of Reducing the Strain of the Surrounding Rock of the Roadway Inside the Slope
  • The Method of Reducing the Strain of the Surrounding Rock of the Roadway Inside the Slope

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Embodiment Construction

[0031] In order to better explain the method for weakening the surrounding rock strain of the roadway inside the slope according to the present invention, the accompanying drawings and the deformation of a certain mine roadway are taken as examples for further elaboration below.

[0032] Such as Figure 1-Figure 5 As shown, the method for weakening the surrounding rock strain of the roadway inside the slope of the present invention includes a side slope 1 and a roadway 2 arranged close to the side slope 1, a roadway lining 3 arranged inside the roadway 2, and the roadway 2 is arranged close to the side slope 1, Such as figure 1 As shown, roadway 2 is parallel to slope 1, and roadway 2 passes through soft rock (chlorite schist belt), with hard rock (iron ore and granite) on both sides. The deformation of chlorite schist inside roadway 2 is larger than that of surrounding rocks. Differential deformation is caused. Roadway 2 is inside the slope, and the stress on roadway 2 is ma...

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Abstract

The invention discloses a method for reducing strain of roadway surrounding rock in a slope. The method comprises the following steps: drilling holes in the inner side, the upper part and the bottom of a roadway slope, calculating and confirming depths and distances of the holes by using finite element software or experience equations, and carrying out rotary drilling to take out a rock core. In the slope deformation process, rock is deformed because of extrusion of stress, the strain is transversely developed because of hole drilling, and longitudinal stress conducted to a roadway lining canbe eliminated or reduced, so that the purpose of reducing roadway deformation can be achieved. By drilling holes by using a drilling machine and taking rock cores, elastic deformation of the roadway surrounding rock can be increased, lining pressure can be reduced, and roadway necking can be reduced.

Description

technical field [0001] The invention relates to a tunnel reinforcement technology, in particular to a method for reducing the strain of surrounding rock in a roadway inside a slope. Background technique [0002] In the process of open-pit mining, when the mine enters deep mining, its transportation method often adopts a car-belt combined transportation system, and the belt is generally installed inside the side slope that has been bordered. With the deepening of mining, the height of the slope becomes larger, and the deformation of the slope gradually increases, especially in the local weak zone, where the amount of deformation is often large. If the belt roadway is in the contact zone between the weak deformation zone and the hard rock, it will cause differential deformation of the roadway in this area, and the necking phenomenon of the roadway will affect the normal production of the roadway. Due to the high slope of the mine, the external slope reinforcement method can o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/00E21B7/04E21B44/00E21B33/00G06F30/23
CPCE21B7/04E21B33/00E21B44/00E21F17/00G06F30/23
Inventor 张宝才刘述栋宫长亮代俊杰樊伟李天龙王建
Owner ANSTEEL GRP MINING CO LTD
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