A point source spacer support loss reduction method using the back bladder bag filling of the hydraulic support

A technology of hydraulic supports and bladders, which is applied in the direction of filling, earth square drilling, mining equipment, etc., can solve the problems of reducing the service life of mines, unsuitable for large-scale promotion and implementation of coal mine enterprises, and high cost investment, so as to achieve the realization of coal mining and The effect of supporting continuous operation, controlling uneven settlement of overlying rock, and saving construction time

Active Publication Date: 2022-02-22
XIAN UNIV OF SCI & TECH
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Problems solved by technology

However, the mining method of retaining coal pillars causes waste of resources and reduces the service life of the mine on the one hand; on the other hand, it affects the production layout and efficient coal recovery
However, the cost of filling mining is too high, and the economic benefit is poor, so it is not suitable for large-scale promotion and implementation of coal mining enterprises.

Method used

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  • A point source spacer support loss reduction method using the back bladder bag filling of the hydraulic support
  • A point source spacer support loss reduction method using the back bladder bag filling of the hydraulic support
  • A point source spacer support loss reduction method using the back bladder bag filling of the hydraulic support

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Embodiment 1

[0036] refer to Figure 1~5 , a method for reducing the damage of a point-source spacer support by filling the back capsule bag of a hydraulic support, specifically comprising the following steps:

[0037] The first step is to determine the overall height of the caving zone through the relationship between the mining height and the caving zone and the mining geological data of the actual coal mine, and determine the spacing L of the point-source spacer support body through the initial caving step distance of the direct top of the roof, and at the same time Considering a certain safety reserve factor, the relationship between mining height and caving zone in this step is a common or easy-to-measure parameter in geological mining;

[0038] The second step is to refer to the relevant national standards for performance testing of grouting materials in coal mines, and determine the appropriate grouting material mix ratio, initial setting time, and grouting strength based on laborat...

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PUM

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Abstract

The invention discloses a method for reducing the loss of a point-source interval support by filling a capsule bag behind a hydraulic support; the method utilizes the temporary support effect of a coal mining hydraulic support, arranges capsule bags at a point-source interval behind the hydraulic support, and passes the hydraulic support to the back of the hydraulic support. The bag is directional grouted to form a point-source interval grouting bag support body, thereby achieving the purpose of coal mining loss reduction by effectively restraining the deformation of the roof; The roof support can be carried out during the coal work, without waiting for the roof to collapse or transport support materials, saving construction time and preventing the support work from affecting the progress of the coal mining operation, so as to achieve the purpose of continuous coal mining and support operations.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a method for filling a point-source interval support and reducing damage by using a hydraulic support rear bladder bag. Background technique [0002] The status of coal as the core energy source in my country will not change in the short term, but with the increase of coal production in my country year by year, many mining damage problems have been brought about, which have a significant impact on the surface ecology and groundwater environment. Especially for the ecologically fragile area of ​​the Ordos Basin, where there is drought and little rain, water resources are scarce, and the ecological environment is fragile. The contradiction between large-scale mining of coal resources and ecological environment protection is very prominent. A large number of previous coal mining practices have shown that coal mining will change the distribution of the underground stress field, c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F15/02
CPCE21F15/02
Inventor 王双明石智军申艳军王生全白志鹏郝建帅侯新
Owner XIAN UNIV OF SCI & TECH
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