Hydraulic site for coal seam mining with underground closed-cycle water supply

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used for hydraulic process of coal production. Main and auxiliary openings are driven via tandem and/or single faces that delineate blocks, barrier and safety pillars. Water is forced into faces by pump stations after cleaning at drainage complexes, mechanised settlers and/or water headers. The latter are located in intercommunicated chambers located at lower points of hydraulic site blocks and exiting into accumulation openings via which hydraulic transport is performed and rock is discharged. Abandoned pillars are liquidated after working of extraction pillar at backstroke in tow-side or single-side cuts. Water is cleaned at mechanised settlers and/or water headers with application of combination of water cleaning technical means and processes. For this, used are, for example, water impermeable partitions with water bypass nearby bottom, thin-layer clarifiers, flotation, coagulation, water processing by constant pulsating current, etc.

EFFECT: working of coal at complex mining and geological conditions, lower costs.

4 cl, 2 dwg

 

The invention relates to mining and can be used for underground hydraulic technology of coal mining.

Known hydrosart [1], which includes the basic parts: underground excavation and installation; surface complex concentration and dehydration of the slurry; complex water clarification system closed water supply. The source of the water is mine drainage which, in time of starting the accumulation of water in sumps and tanks, and in the process of operation compensates for its loss.

When the excavation and transportation of rock mass used high-pressure, low pressure, and a mixed water supply hydrosart.

High-pressure water provides the water pressure from 8.0 to 16.0 MPa, allowing getrootpane coal.

Low-pressure water used for hydraulic transportation of rock mass, is smitten with mekhanogidravlicheskijj harvesters and for dust suppression. The mixed water is applied at joint hydraulic and mekhanogidravlicheskijj the rotating drum.

General technological scheme of work hydrosart with complex dredging of the main processes include: a process water treatment and preparatory faces to the hydro high-pressure pumps, which are installed on the surface; the issuance of hydros the art by gravity from the bottom of troughs in the sump by Plessey camera, whence it is transmitted through the slurry line to arc sieve; processing of large fractions of coal and sludge dewatering thunder and vertical centrifuge and issuing them in a railway hopper; diversion of water from the centrifuge in the surface sludge lagoons for final clarification, the allocation of fines coal, detachable sieve, shutteling craters, horizontal centrifuge and transported in a railway hopper.

Cleaning seizure of coal hydrosart is in short without fixing treatment space (hydro, mekhanogidravlicheskijj harvesters) and long faces (mechanized complexes with the hydraulic transport of coal).

Preliminary mining are coal, mixed bottom with presecco side of breeds or breed.

The main disadvantages of hydrochory are high energy intensity, the need for large capital expenditures, large losses of coal.

A well-known site (hydrocomplex) [2], as part of the mine or the area in which technological processes are carried out with the use of dredging.

The disadvantage is the lack of limitations in space mining operations.

Known water ratio underground mining with a closed loop water supply [3], which includes equipment supply and create high working pressure of the odes, established in the course of the technological scheme of downhole equipment getrootpane coal crusher, a screen, a hopper for larger size illuminator of recycled water for thickening pulp and water purification. It is equipped with a mill for fine grinding of coal particles in condensed coal slurry, additional hopper with feeder for feeding into the mill prizegiving plasticizer and mixing it with coal slurry. The illuminator is made in the form of a slurry separator located with the possibility of entering into it by gravity undersize product of the camera screens and further flow of coal slurry to the mill, and the clarified water in a two-stage sump, the primary compartment which contains the clarified water with a higher concentration of particles than in the secondary and have pleasem for directing the water in a preparatory face heading to the harvester, and the secondary compartment is supplied successively installed pumps to increase water pressure and direction in her longwall face to the giant. Rumble is in camera, built near the skip shaft, and a bunker for coal greater size made in the form of hopper Procida.

Lack of water ratio is the complexity and the presence of electrical equipment, which reduces the security level of the mine.

p> There is a method of design of sloping and steep coal seams [4], which is to conduct basic and ventilation horizons accumulating and ventilation drifts, connected by a diagonal extraction workings, which contour extraction blocks of coal. Preparation of longwall mining and dredging coal are mekhanogidravlicheskijj, and for transportation of the smitten rock mass using gravity hydrotransport on soil excavations and trenches.

The disadvantage of this method is the lack of a closed-loop water supply.

The closest technical solution adopted for the prototype, is the way mekhanogidravlicheskijj coal mining [5], which involves the breaking of coal, its hydrotestosterone, enrichment, screening, dewatering and water consumers, and comprehensively combine optimized technological links. The blasting is carried out by selective destruction of the coal array Zachodni with a given size of the chip. Evacuation of extracted coal from Zachodni the flow of water combined with its simultaneous enrichment in the section due to the optimized angle, the size of the chip and a measured amount of water. Dehydration of coal carried out on the scraper conveyor with caltowie sieves, clear elastic elements attached the to Skrepka pipeline. Sort of coal is produced through crushing and sorting complex, made in the form of gravitational shearing crusher selective action and scraper-gap classifiers. Mechanical destruction of coal can produce swept the working body with a disc shearing cutters.

The disadvantage of this method is the lack of clean water for re-use in underground conditions.

The objective of the invention is to develop a gentle, sloping and steep coal seams with complex mining and geological conditions of their occurrence, having problems where traditional methods of coal mining have low rates.

The solution of this problem is achieved by the fact that opening and preparing production are dual and/or single faces that framing excavation blocks, barrier and security pillars, and the flow of water into the hole, carry out pumping stations after purification on drying complexes, mechanized ramps and/or drains which have in interconnected chambers located in the lower part of the excavation block site and having access to accumulating production, which carry out the transport and shipment of rock.

Dehydration of the rock mass and the clean water produced in two stages: at the PE the PTO separate the rock mass by particle size greater than 5 mm, and the second slurry particle size of 0.03 to 5 mm

Left pillars repay after the reserves excavation unit reverse swing bilateral or unilateral benches.

The clean water produced in mechanized ramps and/or drains using a combination of technical means and methods purification of process water, such as waterproof partitions with bypass water at the bottom of the lamella clarifiers type blinds and longitudinal", flotation, coagulation, electroaparatna water constant pulsating current and other

The invention is illustrated by drawings.

In Fig. 1 is a flow diagram of the site.

In Fig. 2 shows the General scheme of dehydration of the rock mass and water purification.

In the drawings taken with the following legend: Excavation unit 1 site, barrier and security pillars 2 contribute paired with Bonami 3 opening 4, 5 and preparing single 6 workings.

Water supply to the faces carry out pumping stations 7, 8 after purification on drying complexes 8, 9, which have interconnected by linkage 11, which is used to bypass water chambers located in the lower part of the excavation block site with the outlet opening in fluid formulation 4, which carry getatr is sport and shipment of the rock mass in the trolley 12 or conveyor belt.

Dehydration of the rock mass and the clean water produced in two stages: at the first separate the rock mass by particle size greater than 5 mm on drying complex 9, and the second slurry particle size of 0.03 to 5 mm dehydrate the system 10, while the pulp from the dewatering complex 9 flows by gravity along the diagonal linkage 11 in the head part dewatering complex 10.

The clean water produced at the second stage in drying complex 9 sludge, which is installed modules of treatment devices that implement the methods of purification of process water, such as waterproof partitions with bypass water at the bottom of the lamella clarifiers type blinds and longitudinal", flotation, coagulation, electroaparatna water constant pulsating current and other

Pumping stations 7 and 8 have the camera next to the complex dehydration of the second stage or shaft sump 13 and provide water preparation 14 and giant faces 15.

The implementation of hydro-sites with underground closed loop water allows to work locally on shallow seams reserves with difficult mining and geological conditions of occurrence of layers, and on the steep and steeply inclined seams almost all stocks, because at the present time, alternative options are more effective technology than hydraulic mining Uglas wide scope and small present cost, not exist.

Sources of information

1. Kuzmich I.A. Hydrosart // Mountain encyclopedia. So 2. - M.: Soviet encyclopedia, 1986. - 575 S. - P.65-66.

2. Thesaurus for hydrosart / Compilers B.A. Teodorovici, P.I. Yurin, S. p. Kostovetsky etc. - Novokuznetsk: Vniigidromash, 1977. - 56 S.

3. RF patent №2209966. The water ratio underground mining with the closed cycle of water. IPC IS 25/60. Will say.: LLC Scientific-production Association "Prokopievskugol. Authors: Dongli A.P., Sourdin S.A., Trojan, NP, etc. Appl. 25.08.1998. Publ. 10.08.2003.

4. RF patent №2133827. Method design of sloping and steep coal seams. IPC IS 45/00, Patentable. Atrashkevich A.A. Declares. Atrashkevich A.A., atrashkevich VA, atrashkevich O.A. and other Authors: atrashkevich A.A., atrashkevich VA, atrashkevich O.A., Pref A.G. and others Appl. 06.01.1998. Publ. 27.12.1999.

5. RF patent №2143559. The way mekhanogidravlicheskijj coal mining. IPC IS 45/00, patentable. Atrashkevich A.A. Declares. Atrashkevich A.A., atrashkevich VA, atrashkevich O.A. and other Authors: atrashkevich A.A., atrashkevich VA, atrashkevich O.A., Pref A.G. and others Appl. 06.01.1998. Publ. 27.12.1999.

1. The site for the development of coal seams underground closed loop water supply, including: opening, preparing, threaded, treatment and ventilation for the production, preparation and treatment of the face, providing excavation of rock mass is, and preparatory work hydraulic and/or mekhanogidravlicheskijj ways, gravity hydrotransport troughs and/or soil mining; pumping station to supply water to the preparation and treatment of the faces burndown piping with shutoff valve; dewatering systems, mechanized ramps and/or drains, characterized in that the opening and prepares production are paired and/or single faces that framing excavation blocks, barrier and security pillars, and the flow of water into the hole, carry out pumping stations after purification on drying complexes, mechanized ramps and/or drains which have in interconnected chambers located in the lower part of the excavation block site and having access to accumulating production, which carry out the transport and shipment of rock.

2. The site for the development of coal seams underground closed loop water supply according to claim 1, characterized in that the dehydration of the rock mass and the clean water produced in two stages: at the first separate the rock mass by particle size greater than 5 mm, and the second slurry particle size of 0.03 to 5 mm

3. The site for the development of coal seams underground closed loop water supply according to claim 1, characterized in that the OS is avlonya pillars repay after the reserves excavation unit reverse swing bilateral or unilateral benches.

4. The site for the development of coal seams underground closed loop water supply for items 1 and 2, characterized in that the cleaning water is produced in mechanized ramps and/or drains using a combination of technical means and methods purification of process water, such as waterproof partitions with bypass water at the bottom of the lamella clarifiers type blinds and longitudinal", flotation, coagulation, electroaparatna water constant pulsating current and other



 

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3 cl, 1 dwg

Hydraulic monitor // 2272143

FIELD: methods of hydraulic mining, particularly hydraulic monitors for rock breakage with water jets.

SUBSTANCE: hydraulic monitor comprises base, hinge assembly and barrel with nozzle. Through pipe extending along barrel axis is installed in barrel channel and supported by centrators. The first pipe end is communicated with atmosphere, another one is located in the nozzle. Pipe-nozzle diameter ratio is 0.50-0.57. The pipe serves as ejection means. As high pressure water passes through the nozzle streamlined air bubble is created at pipe outlet due to air ejection. Air bubble pressure is less than atmospheric pressure. This provides jet compression at nozzle outlet and as a result increases jet range. Abrasive and chemical materials may be used with water jet to improve rock breakage efficiency.

EFFECT: increased efficiency.

1 dwg

FIELD: mining, particularly to develop gold-bearing rock with high clay content.

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EFFECT: reduced specific power consumption.

6 dwg

FIELD: geotechnology, particularly bore mining in wide range of mining and geological conditions.

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EFFECT: reduced power inputs for hydraulic rock cutting.

2 dwg

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