A fully-mechanized mining face mine water resource utilization system and its application method

A technology for fully mechanized mining face and water resources, applied in mining wastewater treatment, chemical instruments and methods, water pollutants, etc. The effect of resource utilization, alleviation of mine water shortage, and improvement of purification efficiency

Active Publication Date: 2020-06-12
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional sewage treatment system, the water in the water tank can only be pumped up to the ground through the water pump for treatment, which not only occupies a large amount of land resources, but also needs to transport clean water to the underground when using water, which increases the transportation cost. The stagnant water has not been utilized, and the stagnant water in the goaf has also brought potential pollution risks to the groundwater body

Method used

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  • A fully-mechanized mining face mine water resource utilization system and its application method
  • A fully-mechanized mining face mine water resource utilization system and its application method
  • A fully-mechanized mining face mine water resource utilization system and its application method

Examples

Experimental program
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Effect test

Embodiment 1

[0033] like Figure 1-4 As shown, a fully-mechanized mining face mine water resource utilization system, a fully-mechanized mining face mine water resource utilization system, including working face sewage and goaf water collection and purification system 5, sludge treatment system and feedback control system, domestic water delivery pipeline and process water delivery pipeline.

[0034] The working face sewage and goaf accumulated water collection and purification system 5 includes roadway floor water channel 8, gangue isolation metal grid 13, horizontal partition board 21, vertical partition board 23 and filter metal grid 18, and one end of roadway floor water channel 8 is located at At the stop line, the other end is at the cut eye. The width W of the roadway floor water channel 8 is 1 / 5 of the roadway width, and the depth Among them, P is the amount of sewage discharged into the ditch within 1 minute of the working face; Y is the amount of water gushed into the goaf wit...

Embodiment 2

[0040] The method for treating sewage in the fully-mechanized mining face mine water resource utilization system in Example 1 includes the steps:

[0041] S1: Sewage from the working face and accumulated water in the gobs flow into the roadway floor channel 8 under the action of gravity. The accumulated water in the gobs and the sewage from the working face flow into the sewage collection area 17 through the metal grid 13 that isolates gangue, and then flow into the physical filtration area 14. After being filtered by the physically graded and filtered metal grid 18, it is pumped into the suspended solids treatment area 15 by the water pump 23;

[0042] S2: Add an acid-base regulator in the suspended matter treatment area 15, adjust the pH value of the water to 6-8, then add PAM and PAC flocculant, the solid suspended matter will react with PAM and PAC flocculant to form a precipitate, and the treated After the water is filtered through the microporous membrane 19, part of the...

Embodiment 3

[0051] In this embodiment, a mining roadway with a lower elevation towards the longwall working face is taken as an example to describe in detail:

[0052] Going to the longwall working face, the width of the mining roadway with a lower elevation is 5m, and the water inflow Y in the goaf behind the working face is 0.20m 3 / min, the flow P of the sewage discharged from the working face is 0.23m 3 / min, the metal ions contained in the gushing water of the goaf include Cu 2+ , Zn 2+ 、Ni 2+ 、Cr 2+ , where Cu 2+ The concentration is 10mg / L, Zn 2+ The concentration is 12mg / L, Ni 2+ The concentration is 6mg / L, Cr 2+ The concentration is 5mg / L.

[0053] Excavate roadway floor water channel 8 in the roadway floor with lower elevation. The width W of the canal is 1m, and the depth of the canal The water channel is divided into upper and lower layers with a horizontal dividing plate 21, and the water channel is divided into 3 regions with a vertical dividing plate at the lower...

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Abstract

A fully-mechanized mining working face mine water resource utilization system is composed of a working face sewage and goaf accumulated water collection and purification system, a sludge treatment system, and a feedback control system. The collection and purification system of working face sewage and goaf accumulated water can be divided into four parts: sewage collection area, physical filtration area, suspended solids treatment area and heavy metal ion treatment area. The sludge treatment system consists of a return pipe, a sludge pump, a sludge pumping pipe, and a mechanical centrifuge. The detection and feedback system is composed of detectors, electronically controlled valves, automatic control consoles and water pumps arranged in the channel of the roadway floor. This system centrally treats the sewage generated in the working face and the accumulated water in the goaf with the purification device arranged in the floor of the mining roadway, and treats the sewage into production water and domestic water, and transports it to various water points underground and on the ground to achieve The purpose of resource utilization of sewage in working face and goaf.

Description

technical field [0001] The present invention relates to the field of mine wastewater recycling and utilization, and in particular to a fully mechanized mine water resource utilization system and a use method thereof. Background technique [0002] In recent years, coal mining has gradually shifted from eastern China to central and western China, and coal mining has destroyed the environment of groundwater, leading to the loss of groundwater resources, resulting in increasingly scarce water resources in water-scarce areas in the west. The longwall coal mining method is the main coal mining method in my country. After the working face is pushed through, a space full of voids is formed in the goaf, and the water in the rock formation and fissures tends to accumulate in the goaf, forming water accumulation in the goaf. [0003] After the working face is pushed through, there will inevitably be cracks in the roof and floor of the goaf. The cracks in the roof and floor make the goa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F101/20C02F101/22C02F103/10
CPCC02F1/56C02F1/28
Inventor 黄艳利李巍翟文李俊孟张吉雄董霁红马昆赛米尔·扎伊泽
Owner CHINA UNIV OF MINING & TECH
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