CN108525356B - Treatment method of underground sump coal slime - Google Patents

Abstract

The invention belongs to the field of underground sump cleaning, and particularly relates to a method for treating coal slime of an underground sump, which comprises the following steps of isolating the sump to be cleaned, plugging the water inlet of the sump to be cleaned by using a plug, closing a communication valve of a water suction well, opening a drainage pump, and reducing the water level in the sump to be cleaned to the minimum; then extracting the coal slime, fully stirring the coal slime by using coal slime stirring equipment, sucking out the coal slime by using a slurry machine, and introducing the coal slime into a stirring box for fully stirring to separate the coal slime into thick coal slime and thin coal slime; conveying the thick coal slime to the ground by using a belt conveyor; the method comprises the following steps of (1) enabling dilute coal slime to sequentially pass through a filtering buffer device and a filter pressing device to respectively form a coal slime cake and return water, conveying the coal slime cake to the ground through a mine car, and sending the return water to other water bins through a conveying pipeline; and after the coal slime cleaning work is finished, removing the blockage and opening each valve to ensure that the water sump to be cleaned circulates. The invention can increase the speed of cleaning the water sump, avoid the environmental pollution to the underground transportation roadway and reduce the working strength of workers.

Description

Treatment method of underground sump coal slime

Technical Field

The invention belongs to the field of cleaning of underground water sump of coal mine, and particularly relates to a method for treating coal slurry of the underground water sump.

Background

The underground water sump of the coal mine is an important facility for ensuring safe production and preventing mine flood. Along with the extension of mine exploitation, the mine gushes water volume and increases gradually, and the drain pump can not in time arrange the gushing water on ground and store up in the sump in the pit. Because gush water in a large number and carry solid particle thing entering sump for sump effective retaining volume in the pit reduces, must regularly clear up the solid of depositing in the sump. The underground water sump has bad working conditions, the water content in the sludge is large, the sludge is often changed into a semi-fluid state or a fluid state after being stirred, the labor intensity is high by using the traditional shovel-loaded mine car to transport out of the sump cleaning mode, the working efficiency is low, the cross section of the water sump is limited, and a plurality of people cannot be arranged to work simultaneously, so that the sump cleaning period is long, and the safety production is influenced.

The commonly used method for dredging the sump at present is as follows:

(1) and (5) manually clearing and digging. The water in the sump to be dug is drained by a pump, and the coal slime is directly loaded on a mine car by a worker by a shovel or an iron bucket and then transported to the ground.

(2) A slurry pump is used. And directly discharging the coal slime and water to the goaf by a slurry pump without recycling.

(3) And (5) coal slime recovery. And (3) building a coal slime sedimentation tank and a stirring tank, pumping into a filter press by using a pump, and carrying out filter pressing and recycling on the coal slime. The process has high recovery rate, but has large civil engineering quantity and large equipment investment.

(4) A screw pump is used. Part of water is firstly pumped and discharged, and then the thick coal slime is pumped and discharged to an underground coal bunker by a screw pump and is doped with dry raw coal. The method is easy to cause the water accumulation in the coal bunker or the coal slime to accumulate into large blocks to block the coal chute.

(5) And (5) pneumatically conveying and cleaning the bin. Firstly, the sludge storage tank is vacuumized by a vacuum pump, slurry enters the sludge storage tank along a suction pipe under the action of atmospheric pressure, and after the slurry is full of the slurry, compressed air is used for discharging coal slime along a sludge discharge pipe. The method has good process effect, but the reliability of the equipment is poor.

(6) A pulsation pump outside the wall of the hose is adopted. The novel hose wall external pulsation pump is simple in structure and convenient to maintain, can realize bottomless valve drainage, but is easy to wear and lower in efficiency.

Therefore, a set of efficient mine sump dredging system is designed, and the system has important practical significance for reducing the labor intensity of workers, improving the sump cleaning speed and the flood resistance of the sump and ensuring the safety production of the mine.

Disclosure of Invention

The invention aims to: the underground water sump coal slime treatment method is provided, so that the labor intensity of workers can be reduced, the working efficiency is improved, and the flood resistance of the water sump is enhanced.

The technical scheme for solving the technical problem is as follows:

a treatment method of underground sump coal slime comprises the following specific steps:

(1) isolating a water sump to be cleaned; plugging the water inlet of the water sump to be cleaned by using a plug, enabling water to flow into other water sumps, closing a communicating valve of a water suction well, isolating the water sump to be cleaned from other water sumps, and opening a drainage pump to reduce the water level in the water sump to be cleaned to the minimum;

(2) extracting coal slime; fully stirring and sucking out the coal slime and water at the bottom of the sump to be cleaned by using coal slime stirring equipment, and introducing the sucked-out mixed coal slime into a stirring box for fully stirring and then outputting;

(3) treating the coal slime; if the output mixed coal slime is thick coal slime, conveying the thick coal slime to the ground by utilizing conveying equipment; if the output mixed coal slime is dilute coal slime, the dilute coal slime sequentially passes through a filtering and buffering device and a pressure filtration device to form coal slime cakes and return water, the coal slime cakes are conveyed to the ground through a conveying device, and the return water is conveyed to other water bins through conveying pipelines;

(4) opening the water sump to be cleaned; after the coal slime cleaning work is finished, removing a blockage at the water inlet of the water sump to be cleaned, opening a communicating valve of a suction well, and simultaneously moving coal slime stirring equipment from the deep part of the water sump to be cleaned to an outlet to enter a mine water flushing pump overflowing part and a conveying pipeline of the water sump to be cleaned so as to avoid blockage; and the pumped mine water flows back into the water bin to be cleaned along the drainage ditch.

Compared with the prior art, the invention has the beneficial effects that: the method for treating the underground sump coal slime is simple to operate, effectively shortens the sump cleaning time, reduces the risk of sump operation, ensures the safety of main drainage of a mine, improves the capability of the sump to resist flood disasters, avoids environmental pollution to an underground transportation roadway, and is beneficial to underground safe transportation; and the pollution of the above-ground treatment of the slime water to the environment is avoided.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The method for treating the coal slurry in the underground water sump provided by the invention is explained.

A method for processing underground sump coal slime adopts coal slime stirring equipment and peripheral equipment thereof to form a production line type working method, and the method comprises the following specific steps:

(1) and isolating the water sump to be cleaned. Plugging the water inlet of the water sump to be cleaned by using a plug, enabling water to flow into other water sumps, closing a communicating valve of a water suction well, isolating the water sump to be cleaned from other water sumps, and opening a drainage pump to reduce the water level in the water sump to be cleaned to the minimum; the plug can adopt a woven bag filled with soil;

(2) and (5) extracting coal slime. Fully stirring and sucking out the coal slime and water at the bottom of the sump to be cleaned by using coal slime stirring equipment, and introducing the sucked-out mixed coal slime into a stirring box for fully stirring and then outputting; the coal slurry stirring equipment usually uses a slurry pump, the slurry pump is used for sucking coal slurry from a water sump to be cleaned, the first stirring is carried out, a stirring pump is arranged in a stirring box for preventing the coal slurry from precipitating in the transmission process, and the sucked coal slurry is stirred for the second time;

(3) and (4) treating the coal slime. If the output mixed coal slime is thick coal slime, the thick coal slime is conveyed to the ground by utilizing conveying equipment, the conveying equipment usually uses a belt conveyor to directly pump the thick coal slime to the belt conveyor to be mixed with coal blocks on a belt, so that the fluidity of the thick coal slime is weakened, and the thick coal slime is conveyed to the ground along with raw coal through the belt; if the output mixed coal slime is dilute coal slime, the dilute coal slime sequentially passes through a filtering buffer device and a filter pressing device to form a coal slime cake and return water, the coal slime cake is conveyed to the ground through a conveying device, the conveying device is usually a mine car, the mine car is drawn to an inlet of a sump to be cleaned, the filter-pressed coal slime cake is directly loaded into the mine car and lifted to the ground through an inclined plane, and then the return water is conveyed to other sumps through a conveying pipeline;

(4) and opening the water bin to be cleaned. After the coal slime cleaning work is finished, removing the plug at the water inlet, opening the communicating valve of the water suction well, simultaneously, moving the stirring pump from the deep part of the water sump to be cleaned to the outlet, entering the mine water flushing pump overflowing part and the conveying pipeline of the water sump to be cleaned, avoiding blockage, and pumping out mine water flowing back along the drainage ditch to enter the water sump to be cleaned.

Before the coal slime of the water sump to be cleaned is cleaned, a certain floating body is adopted to float the hose of the device, so that the damage to the cable is avoided.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the invention, the scope of the invention being defined by the appended claims and their equivalents, and all changes which come within the meaning and range of equivalency of the claims are to be embraced therein.

Claims (1)

1. A treatment method of underground sump coal slime is characterized by comprising the following specific steps:

(1) isolating a water sump to be cleaned; plugging the water inlet of the water sump to be cleaned by using a plug, enabling water to flow into other water sumps, closing a communicating valve of a water suction well, isolating the water sump to be cleaned from other water sumps, and opening a drainage pump to reduce the water level in the water sump to be cleaned to the minimum;

(2) extracting coal slime; fully stirring and sucking out the coal slime and water at the bottom of the sump to be cleaned by using coal slime stirring equipment, and introducing the sucked-out mixed coal slime into a stirring box for fully stirring and then outputting;

(3) treating the coal slime; if the output mixed coal slime is thick coal slime, the thick coal slime is conveyed to the ground by utilizing conveying equipment, the conveying equipment is a belt conveyor, the thick coal slime is directly pumped to the belt conveyor and is mixed with coal blocks on a belt, the fluidity of the thick coal slime is weakened, and the thick coal slime is conveyed to the ground along with raw coal through the belt; if the output mixed coal slime is dilute coal slime, the dilute coal slime sequentially passes through a filtering and buffering device and a pressure filtration device to form coal slime cakes and return water, the coal slime cakes are conveyed to the ground through a conveying device, and the return water is conveyed to other water bins through conveying pipelines;

(4) opening the water sump to be cleaned; after the coal slime cleaning work is finished, removing a blockage at the water inlet of the water sump to be cleaned, opening a communicating valve of a suction well, and simultaneously moving coal slime stirring equipment from the deep part of the water sump to be cleaned to an outlet to enter a mine water flushing pump overflowing part and a conveying pipeline of the water sump to be cleaned so as to avoid blockage; and the pumped mine water flows back into the water bin to be cleaned along the drainage ditch.