Expansion filling method based on gangue filling

A technology of gangue and backfill, which is applied in the fields of backfill, earthwork drilling, safety devices, etc., can solve the problems of low backfilling compaction strength and small range, solve the problem of backfilling, improve the filling rate, and improve resource recovery. rate effect

Inactive Publication Date: 2018-08-17
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

It can solve the problems of gangue filling roof connection and low filling compaction strength and small range

Method used

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  • Expansion filling method based on gangue filling
  • Expansion filling method based on gangue filling
  • Expansion filling method based on gangue filling

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Embodiment Construction

[0026] The present invention proposes an expansion filling method based on gangue filling. In order to make the advantages and technical solutions of the present invention clearer and clearer, the present invention will be described in detail below in conjunction with specific examples.

[0027] combine Figure 1 to Figure 5 Shown, the present invention a kind of expansion filling method based on gangue filling, specifically comprises the following steps:

[0028] In the first step, after the coal cutting is completed, a partition wall 1 is set in the goaf along the direction of the working face. The passage opening 2 for filling gangue and expansion materials, the diameter of the passage opening 2 is equal to 1 / 5 of the height of the goaf, and the separation wall 1 separates the goaf into a closed filling space. The partition wall 1 is spliced ​​by a plurality of templates, and the outside of the templates are fixed by brackets.

[0029] The second step is to fill the gangu...

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Abstract

The invention discloses an expansion filling method based on gangue filling. The expansion filling method comprises the following steps that after coal cutting is completed, a separation wall is arranged in a goaf in the direction of a working face, the upper end of the separation wall is close to the top of the goaf, a passageway opening is reserved between the upper end of the separation wall and the top of the goaf, and filling space is formed between the separation wall and the goaf; the goaf is filled with gangue through the passageway opening, a feeding installation hole is formed in theupper end of the separation wall, a distributing material pipe group is installed on the feeding installation hole, and the distributing material pipe group is formed by distributing a plurality of first distributing material pipes and a plurality of second distributing material pipes at intervals; and expansion agent fluid is supplied to the filling space by switching between a first feeding pump and a second feeding pump. According to the expansion filling method, the expansion characteristic of an expansion agent is utilized on the basis of the gangue to fill the goaf in a short time, thencertain stress is produced on surrounding rocks under the condition of limited expansion, and the full range compaction of a gangue filling body is achieved.

Description

technical field [0001] The invention relates to the technical field of mining industry filling, in particular to a filling method. Background technique [0002] At present, the key elements for evaluating the filling effect in the coal industry mainly include three aspects: filling rate, filling body strength and filling body stability. Among the filling mining methods adopted, gangue filling technology is more mature and widely used. Through gangue filling, waste coal gangue can be effectively used to solve the environmental and ecological pollution caused by the accumulation of coal gangue and the spontaneous combustion of coal gangue. At the same time, it can effectively solve the problems of land subsidence caused by coal mining. The ground provides effective foundation support. [0003] When using gangue filling materials and their mechanical transportation for filling mining, firstly, because full filling (that is, complete roofing) cannot be achieved in the vertical...

Claims

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Application Information

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IPC IPC(8): E21F15/00
CPCE21F15/005
Inventor 丁可郭嘉兴谭云亮顾士坦李洪超张凯徐强
Owner SHANDONG UNIV OF SCI & TECH
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