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Coal face filling and supporting method

A technology of coal mining face and filling method, which is applied to the direction of filling, mining equipment, earth square drilling and mining, etc., to achieve the effects of reducing support costs, convenient operation and ensuring safety

Inactive Publication Date: 2019-11-15
INNER MONGOLIA YITAI COAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In turn, it can reduce the waste of high-quality coal resources that cannot be recycled due to problems such as support or that the safety risk of recycling is high

Method used

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  • Coal face filling and supporting method
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for filling and supporting coal mining face, adopting coal-based concrete filling material to fill and support the gob in the coal mining face, the filling method includes underground filling method and ground drilling and filling method; when the working face is mined, coal-based concrete filling The material is cut by the shearer together with the coal pillar and enters the coal flow system; the raw materials of the coal-based concrete filling material include: coal-based material, binder and water, and the coal-based material is coal powder, coal slime or A mixture of coal powder and coal slime, the binder is cement or a mixture of cement and lime; the mass ratio of coal-based matter to cement is 100: 12~18, and the mass ratio of coal-based matter to lime is 100:0.8 ~1.2, the amount of cement is 0.2~0.25 tons / m 3 Filler. Comparison of support effect as shown in figure 1 shown. According to the specific situation, the filling and support strength can be ad...

Embodiment 2

[0023] This embodiment is an improvement made on the basis of Embodiment 1. For the same part as Embodiment 1 in this embodiment, please refer to the content disclosed in Embodiment 1 for understanding, and the content disclosed in Embodiment 1 should also be used as this embodiment. The content of the example will not be repeated here.

[0024] Described binding agent is cement, and the selected cement is 4.25 type cement, wherein the mass ratio of coal-based matter and cement is 100: 15, and the consumption of cement is 0.24 tons / m 3 The filling material is coal powder.

Embodiment 3

[0026] This embodiment is an improvement made on the basis of Embodiment 1. For the same part as Embodiment 1 in this embodiment, please refer to the content disclosed in Embodiment 1 for understanding, and the content disclosed in Embodiment 1 should also be used as this embodiment. The content of the example will not be repeated here.

[0027] Described binding agent is cement, and the selected cement is 4.25 type cement, wherein the mass ratio of coal-based matter and cement is 100: 15, and the consumption of cement is 0.24 tons / m 3 As the filling material, the coal base is coal slime or a mixture of coal slime and coal powder.

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Abstract

The invention discloses a coal face filling and supporting method. A coal-based concrete filling material is adopted to fill and support an abandoned roadway of a coal face, and the filling method comprises a downhole filling method and a ground drilling filling method; the coal-based concrete filling material is prepared from the raw materials: coal-based substrate, a binder and water, the coal-based substrate is coal powder, coal slime or a mixture of coal powder and coal slime, the binder is cement or a mixture of cement and white ash; the mass ratio of the coal-based substrate to the cement is 100 to (12 to 18), the mass ratio of the coal-based substrate to the white ash is 100 to (0.8 to 1.2), and the amount of the cement is 0.2-0.25 ton / m<3>. The coal face filling and supporting method supports the abandoned roadway of the coal face using a safe and reliable filling and supporting technology, reduces the support cost, recovers coal resources which cannot be safely recovered, improves the recovery rate of the coal resources, is convenient to operate, and ensures the safety in the recovery process.

Description

technical field [0001] The invention relates to the technical field of coal mine mining, in particular to a roof control technology applied to a coal mine goaf, in particular to a method for filling and supporting a coal mining face. Background technique [0002] With the recovery of high-yield mines, the number of regular working faces that can be arranged is reduced, and some coal resources cannot be recycled due to problems such as support or the recovery safety risk is high, resulting in waste of high-quality coal resources. The empty roadway in the coal mining face needs to be supported by reasonable and reliable filling and support technology, so as to reduce the support cost as much as possible, recover the coal resources that cannot be recovered safely, improve the recovery rate of coal resources, facilitate the operation, and ensure the safety of the recovery process performance, and the feasibility of arranging the work surface. Contents of the invention [0003...

Claims

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Application Information

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IPC IPC(8): E21F15/00
CPCE21F15/00E21F15/005
Inventor 许景荣白虎李正甲袁小浩庞军林
Owner INNER MONGOLIA YITAI COAL