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Filling method and system of coal mine goaf

A technology for gobs and coal mines, which is applied to filling materials, mining equipment, and earthwork drilling and mining, and can solve problems such as shortage of filling materials, achieve the effects of reducing filling production costs, good flow performance, and saving manpower and material resources

Active Publication Date: 2013-01-09
河北充填采矿技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for filling goafs in coal mines to solve the problem of lack of filling materials in goafs in coal mines, expand the source of filling materials, improve the filling effect, and enhance the strength of filling bodies

Method used

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  • Filling method and system of coal mine goaf
  • Filling method and system of coal mine goaf

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Coal mine goaf filling system of the present invention such as figure 1 As shown, including waste rock silo, cement silo, coal ash silo, pool, feeder, weighing hopper, mixer, slurry machine, filling pump, conveying pipeline, working face pipe and tee pipe, conveying pipe The road includes surface pipes, drill pipes and downhole pipes, and the surface pipes, borehole pipes and downhole pipes are connected in sequence. The waste rock silo, the cemented silo and the coal ash silo are respectively connected to their respective weighing hoppers through their respective feeders, and the water pool is connected to their respective weighing hoppers through a water pump. Each weighing bucket is connected to the inlet of the mixer respectively, the outlet of the mixer is connected to the inlet of the filling pump through the slurry machine, the outlet of the filling pump is connected to the surface pipe, the drilling pipe and the downhole pipe in turn, the downhole pipe is co...

Embodiment 2

[0024] Another embodiment of the present invention is that the waste rock is stripped covering soil, surrounding rock and gangue without industrial value, and the cementing material is water-quenched slag. Use fly ash as fine aggregate, add waste rock, water-quenched slag and water into the mixer and stir evenly to make a slurry with a mass concentration of 81%. Waste rock, water-quenched slag, and fly ash are contained in each cubic slurry The ratio of water and water is 1086kg: 100 kg: 400 kg: 372 kg. The slurry is sent to the inlet of the filling pump through the slurry machine. Other steps of the goaf filling system and filling process of this embodiment are the same as those of Embodiment 1.

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Abstract

The invention relates to a filling method and system of coal mine goaf. The filling system comprises a filling bin, a feeder, a weighing hopper, a stirrer, a slurry machine, a filling pump, a delivering pipeline, a working face pipe and a tee pipe, wherein the filling bin is respectively connected with the inlet of the stirrer through the feeder and the weighing hopper; and the outlet of the stirrer is connected to a filling point through the slurry machine, the filling pump, the delivering pipeline and a tee valve. The filling method comprises the steps that barren rocks with granularity of less than 25mm, a cementing agent, pulverized fuel ash and water are delivered to the weighing hopper through the feeder for weighing; the barren rocks, the cementing agent and the pulverized fuel ash are mixed in a mass ratio of 1:(0.22-0.80):(0.35-0.57), and are added with water to produce slurry in a mass concentration of between 70 and 83 percent through the stirrer; and the slurry is delivered to the filling point for filling through the slurry machine, the filling pump, the delivering pipeline, the working face pipe and the tee valve. According to the filling method and system, the sources of filling materials can be enlarged, the filling substance strength and durability can be increased, the filling material can be delivered to the filling point and uniformly filled by delivering and filling in a slurry state, and the filling effect can be improved.

Description

technical field [0001] The invention belongs to the technical field of mine goaf filling, and relates to a method and a filling system for coal mine goaf filling, in particular to a goaf filling method using waste rock, fly ash, cementing material and water as filling materials and filling system. Background technique [0002] Mine goaf is the underground space left after mining. If it is not filled, it will cause ground subsidence and bring danger. Filling gobs underground in coal mines can reduce ground subsidence and eliminate unsafe factors. Filling mining is to fill the goaf with underground or ground filling materials to control surface subsidence and increase the mining rate of coal resources. Currently, the main materials for filling gobs in coal mines are gangue, in addition to coal powder ash and steel slag (metallurgical slag). [0003] Gangue is the most widely used as the main filling material in coal mine goafs, and the amount of use is also the largest. Som...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/08C04B28/00
Inventor 刘建功赵庆彪
Owner 河北充填采矿技术有限公司
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