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Goaf coal gangue supporting solid filling method

A supportive, goaf technology, used in fillings, mining equipment, earthwork drilling, etc., can solve the problems of material compaction coefficient and compaction space, and low economic value, and improve the recovery of coal resources. The effect of reducing the cost of road retaining and saving loess resources

Pending Publication Date: 2020-12-08
孙嘉岐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods all have a common feature, that is, the compaction coefficient and compaction space of the filled material are relatively large.
Therefore, the economic value brought by its filling is not great

Method used

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  • Goaf coal gangue supporting solid filling method
  • Goaf coal gangue supporting solid filling method
  • Goaf coal gangue supporting solid filling method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0052] (1) Preparation of coal gangue powder: The gangue screened by the dynamic sieve workshop and the gangue washed by the coal preparation workshop are transported to the gangue aggregate warehouse for buffering by belt conveyor, and then the gangue is transported to the coal mine by belt conveyor. In the gangue crushing workshop, after being crushed by the crusher, the gangue powder is transported to the gangue powder bin by the belt conveyor for standby.

[0053] (2) Pump the prepared material A solution into the solution storage tank for later use.

[0054] (3) Transport the prepared B material to the B material storage warehouse for standby.

[0055] So far, the production and preparation of materials have been completed.

[0056] 2. The material transportation part from the ground to the underground working face:

[0057] (1) Transportation of coal gangue powder: It should be determined on site according to different environmental conditions. Either use a spiral pip...

Embodiment approach

[0076] First, check that the spraying grouting pipeline used in the filling operation is unblocked, the water supply of the water pipe is normal, the valves are flexible to use, the mine filling wet spraying machine and the mine pneumatic grouting pump are working normally, and the filling materials are transported in place, etc.

[0077] Second, before the goaf filling operation, extend the side guards of the end frame hydraulic support in time to ensure that a separation wall is built between the top control area of ​​the hydraulic support of the working face and the area to be filled (including the roadway).

[0078] Third, the filling operation adopts the operation method of moving and filling. That is, no matter which hydraulic support, as long as it moves forward, it will start to fill quickly.

[0079] Fourth, after the filling operation is completed (after the on-duty work is over), clean the mine pneumatic grouting pump and its attached spraying pipes and valves in ti...

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Abstract

The invention discloses a goaf coal gangue compaction, roof contact, gridding and supporting solid filling method. Specifically, a high-strength coal gangue concrete filling material and a pure ganguenon-strength filling material are blended through a control system, and a net-shaped structure state combining a high-strength latticed supporting system and non-strength latticed inner filling is formed in a goaf by adopting a cross spraying operation mode of the two materials. The method has the beneficial effects that a gangue dump can be canceled; damage to a top plate and a bottom plate is reduced or eliminated, and water gushing of the top plate and the bottom plate is reduced; gas emission is reduced; the roadway retaining effect of two roadways is guaranteed, roadway retaining cost isreduced, coal pillar-free mining is achieved, the coal resource recovery rate is increased, the roadway tunneling amount is reduced, and mining continuing tension is relieved; the top and bottom plate approaching amount of the goaf is greatly reduced or eliminated, the top and bottom plate pressure is reduced, and good conditions are created for lower-layer mining; air circulation in the goaf iseffectively prevented, and coal gangue spontaneous combustion and residual coal spontaneous combustion are avoided; and great economic benefits are brought to enterprises.

Description

technical field [0001] The invention belongs to the technical field of goaf filling in mines, and in particular relates to a solid filling method of coal gangue in a goaf with dense, roofing, gridding and supporting properties. Background technique [0002] Goaf coal gangue filling is a coal mining ancillary project with a large amount of capital investment. How to exchange this investment for greater economic benefits is one of the key points of the present invention. [0003] The purpose of coal gangue filling in the goaf is to cancel the gangue dump, that is, to cancel the economic burden caused by environmental pollution, to cancel the cost of gangue dump treatment, and to cancel the cost of land acquisition for the gangue dump; the second is to cancel the ground subsidence and In order to solve the problem of subsidence, the compensation fee shall be cancelled; the third is to reduce the gushing of roof and floor water and reduce drainage costs; the fourth is to reduce ...

Claims

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Application Information

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IPC IPC(8): E21F15/00E21F15/06E21F13/06E21F15/04
CPCE21F13/06E21F15/005E21F15/04E21F15/06
Inventor 孙嘉岐孙兆泰
Owner 孙嘉岐
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