AU2014223133B2 - Method and apparatus for underground separation, conveyance and fill-up of coal and coal gangues - Google Patents

Method and apparatus for underground separation, conveyance and fill-up of coal and coal gangues Download PDF

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Publication number
AU2014223133B2
AU2014223133B2 AU2014223133A AU2014223133A AU2014223133B2 AU 2014223133 B2 AU2014223133 B2 AU 2014223133B2 AU 2014223133 A AU2014223133 A AU 2014223133A AU 2014223133 A AU2014223133 A AU 2014223133A AU 2014223133 B2 AU2014223133 B2 AU 2014223133B2
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AU
Australia
Prior art keywords
coal
ejector
crushing
sorter
gangues
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AU2014223133A
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AU2014223133A1 (en
Inventor
Changlong DU
Hongxiang JIANG
Jianping Li
Chenxu LUO
Daolong YANG
Kehong ZHENG
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China University of Mining and Technology
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China University of Mining and Technology
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Priority to CN201310064694.0A priority Critical patent/CN103133031B/en
Priority to CN201310064694.0 priority
Application filed by China University of Mining and Technology filed Critical China University of Mining and Technology
Priority to PCT/CN2014/071055 priority patent/WO2014131324A1/en
Publication of AU2014223133A1 publication Critical patent/AU2014223133A1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00Disintegrating plant with or without drying of the material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/20Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00General arrangement of separating plant, e.g. flow sheets
    • B03B9/005General arrangement of separating plant, e.g. flow sheets specially adapted for coal
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00Transport specially adapted to underground conditions
    • E21F13/002Crushing devices specifically for conveying in mines
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00Methods or devices for placing filling-up materials in underground workings
    • E21F15/08Filling-up hydraulically or pneumatically

Abstract

A method and apparatus for the underground separation, conveyance, and fill-up of coal and gangues. The method comprises crushing and separating coal and coal gangues two times underground by means of a roll crusher-separator (2) and a hammer crusher-separator (4); feeding the pieces of coal directly into an underground bunker by means of a pneumatic conveyance system (1); crushing the coal gangues into coal gangue fragments by means of a roll crusher (6); and conveying the crushed coal gangues to a goaf to carry out fill-up operations. The apparatus solves the problem of transporting coal and coal gangues underground, economizes underground space, provides large quantities of raw materials for filling-up underground goafs, and helps to avoid problems of cave-ins and the accumulation of coal gangue mounds.

Description

Description Method and apparatus for underground separation, conveyance, and fill-up of coal and coal gangues Field of the Invention The preset invention relates to a method and apparatus for the underground separation, conveyance, and fill-up of coal and gangues, which is especially suitable for sorting and conveyance of mine underground lump coal and gangues. Background of the Invention At present, the separating and sorting methods of coal and gangues used mainly includes hand sorting, wind sorting, water sorting, y-ray sorting and the like. The hand sorting is manually picking gangues from a belt conveyer, which has hard working conditions, low efficiency, serious false sorting and missing. The wind sorting is separating coal and gangues via the buoyancy of wind depending on the different densities of coal and gangues, which is suitable for areas lack of water resources, but this method is great in apparatus cost, large in occupied area, huge in dust processing equipment, undesirable in treatment effects and not suitable for using underground. The water sorting is separating coal and gangues via the buoyancy of liquid depending on the different densities of coal and gangues, which has good sorting effects, but this method needs expensive equipment and complex process and is difficult to achieve underground. The y-ray sorting is to identify coal and gangues by utilizing y-rays, generate different electrical signals according to the difference between the decrements of y-rays in coal and gangues, control the executing mechanism by the feedbacks of electrical signals and change the motion track of gangues so as to achieve the separation of coal and gangues, however, it has complex system, low sorting capacity and radiation hazard of radiation source, and raw coal in site always contains water or coal slurry, the surfaces of coal pieces and gangues are covered by coal slurry, resulting in hard identification. Direct sorting underground raw coal and filling up goaf is not only an optimal method for solving the farmland occupation and environmental pollution of gangues, but also an effective measure for improving the economic and social benefits of coal mines and meanwhile an effective approach for solving the problem of underground filling materials. Especially under the current circumstance of emphasizing circular economy and implementing the sustainable development strategy, it is an important development direction for countering the harm of gangues to research and extend the application of a clean coal producing technique without gangues out from mines, which can not only improve the ecological environment, but also has wide market application prospect and practical significance on projects. Therefore, a problem to be solved now is to directly sort coal and gangues underground. Disclosure of the Invention Object of the Invention: The object of the prevent invention is to overcome the disadvantages in the prior art and provide a method and apparatus for the underground separation, conveyance, and fill-up of coal and gangues. The method for the underground separation, conveyance, and fill-up of coal and gangues according to the present invention is: a. initially crushing and sorting coal and gangues mined underground by a double-roll crushing sorter; b. feeding coal pieces with a particle size less than 50 mm sorted by the double-roll crushing sorter into a pneumatic conveyance system, and conducting secondary crushing and sorting on coal pieces and gangues with a particle size above 50 mm by a hammer crushing-sorter; c. feeding the coal pieces with a particle size less than 50 mm sorted by the hammer crushing sorter into the pneumatic conveyance system and conveying along with the coal pieces with a particle size less than 50 mm sorted by the double-roll crushing-sorter into an underground coal bunker, and crushing the gangues with a particle size above 50 mm into gangue fragments with a particle size less than 30 mm by a double-roll crusher; d. conveying the gangue fragments with a particle size less than 30 mm into an underground goaf by the pneumatic conveyance system and then conducting pneumatic fill-up via a mining wet spraying machine. The apparatus for the underground separation, conveyance, and fill-up of coal and gangues according to the present invention comprises a pneumatic conveyance system, a double-roll crushing-sorter, a hammer crushing-sorter, a double-roll crusher and a mining wet-spraying machine, the pneumatic conveyance system comprising a fan, a first air separator, a first material ejector, a second air separator, a second material ejector and a third material ejector. The first material ejector and the third material ejector including one air inlet, one feed port and one mixed material discharge port respectively, the second material ejector including one air inlet, two feed ports and one mixed material discharge port, and the first and second air separators including one air inlet and two air outlets respectively; a fine raw material discharge port of the double-roll crushing-sorter is connected with the feed port of the first material ejector, a coarse raw material discharge port of the double-roll crushing-sorter is connected with a feed port of the hammer crushing-sorter, a fine raw material discharge port of the hammer crushing-sorter is connected with one feed port of the second material ejector, the coarse raw material discharge port of the hammer crushing-sorter is connected with a feed port of the double-roll crusher, and a discharge port of the double-roll crusher is connected with the feed port of the third material ejector; the fan is connected with the air inlet of the first air separator, two air outlets of the first air separator are connected with the air inlet of the first material ejector and the air inlet of the second air separator respectively, the mixed material discharge port of the first material ejector is connected with the other feed port of the second material ejector, the mixed material discharge port of the second material ejector is connected with the underground coal bunker, two air outlets of the second air separator are connected with the air inlets of the second and third material ejectors respectively, and the mixed material discharge port of the third material ejector is connected with the mining wet spraying machine. Beneficial Effects: The method and apparatus for the underground separation, conveyance, and fill up of coal and gangues according to the present invention achieves organic combination between coal and gangues sorting system and pneumatic conveyance and fill-up system depending on the actual working conditions underground, directly crushes and sorts coal and gangues underground by the coal and gangues crushing and sorting system, then directly feeds the sorted coal pieces into the underground coal bunker by the pneumatic conveyance and fill-up system and conveys the crushed gangues into the goaf for filling-up operation. It does not only solves the underground conveyance problem of coal and gangues and saves underground space, but also provides a lot of raw material for filling up the underground goaf so as to avoid the problems of surface subsidence, gangue piling-up and the like, meeting the requirements of green coal mining and green production. The method has ingenious concept, reasonable structure, simple equipment and small occupied underground space, in particular, the use of the pneumatic conveyance and fill-up system changes the arrangement of underground conveyance, improves the utilization rate of underground space and -.2 has good separation effects of coal and gangues sorting equipment. The method has wide practicality and great inventiveness in this field. Description of Drawings Fig. 1 is an overall structural diagram of the present invention. Fig. 2 is a structural diagram of the pneumatic conveyance system of the present invention. Wherein: 1, a pneumatic conveyance and fill-up system, 2, a double-roll crushing-sorter, 3, a belt conveyer, 4, a hammer crushing-sorter, 5, a guide chute, 6, a double-roll crusher, 7, a mining wet spraying machine, 11, a fan, 12, a first air separator, 13, a first material ejector, 14, a first pneumatic conveying tube, 15, a second air separator, 16, a second material ejector, 17, a third material ejector, and 18, a second pneumatic conveying tube. Embodiments: Further explanation is made to the present invention in conjunction with following accompanying figures. The method for the underground separation, conveyance, and fill-up of coal and gangues of the present invention comprises following steps: a. initially crushing and sorting coal and gangues mined underground by a double-roll crushing sorter 2; b. feeding coal pieces with a particle size less than 50 mm sorted by the double-roll crushing sorter 2 in step a into a pneumatic conveyance system 1, and conducting secondary crushing and sorting on coal pieces and gangues with a particle size above 50 mm by a hammer crushing-sorter 4; c. feeding the coal pieces with a particle size less than 50 mm sorted by the hammer crushing sorter 4 in step b into the pneumatic conveyance system 1 and conveying along with the coal pieces with a particle size less than 50 mm sorted by the double-roll crushing-sorter 2 in step a into an underground coal bunker, and crushing the gangues with a particle size above 50 mm into gangue fragments with a particle size less than 30 mm by a double-roll crusher 6; d. conveying the gangue fragments with a particle size less than 30 mm crushed by the double-roll crusher 6 in step c into an underground goaf by the pneumatic conveyance system 1 and then conducting pneumatic fill-up via a mining wet-spraying machine 7. As shown in Figs. 1 and 2, the apparatus for the underground separation, conveyance, and fill-up of coal and gangues according to the present invention comprises a pneumatic conveyance system 1, a double-roll crushing-sorter 2, a hammer crushing-sorter 4, a double-roll crusher and a mining wet spraying machine 7. The pneumatic conveyance and fill-up system 1 comprises a fan 11, a first air separator 12, a first material ejector 13, a second air separator 15, a second material ejector 16 and a third material ejector 17. The first material ejector 13 and the third material ejector 17 include one air inlet, one feed port and one mixed material discharge port respectively; the second material ejector 16 includes one air inlet, two feed ports and one mixed material discharge port. The first air separator 12 and the second air separator 15 include one air inlet and two air outlets respectively. A fine raw material discharge port of the double-roll crushing-sorter 2 is connected with the feed port of the first material ejector 13, a coarse raw material discharge port of the double-roll crushing sorter 2 is connected with a feed port of the hammer crushing-sorter 4 by a belt conveyer 3, a fine raw material discharge port of the hammer crushing-sorter 4 is connected with one feed port of the second material ejector 16, the coarse raw material discharge port of the hammer crushing-sorter 4 is connected with a feed port of the double-roll crusher 6 by a guide chute 5, and a discharge port of the double-roll crusher 6 is connected with the feed port of the third material ejector 17. . 3 - The fan 11 is connected with the air inlet of the first air separator 12, two air outlets of the first air separator 12 are connected with the air inlets of the first material ejector 13 and the second air separator 15 respectively, the mixed material discharge port of the first material ejector 13 is connected with the other feed port of the second material ejector 16 by a first pneumatic conveying tube 14, the mixed material discharge port of the second material ejector 16 is connected with the underground coal bunker, two air outlets of the second air separator 15 are connected with the air inlets of the second material ejector 16 and the third material ejector 17 respectively, and the mixed material discharge port of the third material ejector 17 is connected with the mining wet-spraying machine 7 by a second pneumatic conveying tube 18. In this embodiment, the overall height of the underground coal and gangues separating and conveying equipment is not more than 3 m, wherein, the maximum particle size for feeding for the double-roll crushing-sorter 2 is 300 mm, the particle size for discharging thereof is 50-100 mm, the particle size for classifying by a screen box thereof is 50 mm and the processing capacity thereof is 250-500 tons per hour. The maximum particle size for feeding for the hammer crushing-sorter 4 is 150 mm, the particle size for discharging thereof is 0~100 mm, the particle size for classifying by a screen box thereof is 50 mm and the processing capacity thereof is 200-400 tons per hour. The maximum particle size for feeding for the double-roll crusher 6 is 150 mm, the particle size for discharging thereof is 0-30 mm and the processing capacity thereof is 150-350 tons per hour. The conveying capacity of the belt conveyer 3 is 260 tons per hour, the particle size for conveying thereof is 0-100 mm, the horizontal length of sloping section thereof is 7.7 m, the overall height of the conveyer is 2.7 m, and the belt uses an anti-flaming rubber belt. The air pressure of the pneumatic conveyance and fill-up system 1 is 0.4-0.5 MPa, and the air consumption thereof is 250-300 m 3 /h, wherein the wind pressure of the first pneumatic conveying tube 14 is 0.5 MPa, the tube diameter thereof is 150 mm, the conveying capacity thereof is 70-80 m 3 /h, the maximum distance for conveyance thereof is 300 m; and the wind pressure of the second pneumatic conveying tube 18 is 0.4 MPa, the tube diameter thereof is 100 mm, the conveying capacity thereof is 30~35 m 3 /h, the maximum distance for conveyance thereof is 500 m. The overall conveyance distance of the pneumatic conveyance and fill-up system 1 is 100-300 m, and it is necessary to add an air supplementing device if the distance is more than 300 m. The description above is only the preferable embodiment of the present invention, it should be pointed out that several variations and modifications can be made by persons having ordinary skills in the art without departing the principles of the present invention, and the variations and modifications should be considered as within the protection scope of the present invention. . 4.

Claims (2)

1. A method for the underground separation, conveyance, and fill-up of coal and gangues, wherein comprising following steps: a. initially crushing and sorting coal and gangues mined underground by a double-roll crushing-sorter (2); b. feeding coal pieces with a particle size less than 50 mm sorted by the double-roll crushing sorter (2) into a pneumatic conveyance system (1), and conducting secondary crushing and sorting on coal pieces and gangues with a particle size above 50 mm by a hammer crushing sorter (4); c. feeding the coal pieces with a particle size less than 50 mm sorted by the hammer crushing sorter (4) into the pneumatic conveyance system (1) and conveying along with the coal pieces with a particle size less than 50 mm sorted by the double-roll crushing-sorter (2) into an underground coal bunker, and crushing the gangues with a particle size above 50 mm into gangue fragments with a particle size less than 30 mm by a double-roll crusher (6); d. conveying the gangue fragments with a particle size less than 30 mm into an underground goaf by the pneumatic conveyance system (1) and then conducting pneumatic fill-up via a mining wet-spraying machine (7).
2. An apparatus for the underground separation, conveyance, and fill-up of coal and gangues, wherein comprising a pneumatic conveyance system (1), a double-roll crushing-sorter (2), a hammer crushing-sorter (4), a double-roll crusher (6) and a mining wet-spraying machine (7), the pneumatic conveyance system (1) comprising a fan (11), a first air separator (12), a first material ejector (13), a second air separator (15), a second material ejector (16) and a third material ejector (17), the first material ejector (13) and the third material ejector (17) including one air inlet, one feed port and one mixed material discharge port respectively, the second material ejector (16) including one air inlet, two feed ports and one mixed material discharge port, and the first air separator (12) and the second air separator (15) including one air inlet and two air outlets respectively; a fine raw material discharge port of the double-roll crushing-sorter (2) is connected with the feed port of the first material ejector (13), a coarse raw material discharge port of the double roll crushing-sorter (2) is connected with a feed port of the hammer crushing-sorter (4), a fine raw material discharge port of the hammer crushing-sorter (4) is connected with one feed port of the second material ejector (16), the coarse raw material discharge port of the hammer crushing-sorter (4) is connected with a feed port of the double-roll crusher (6), and a discharge port of the double-roll crusher (6) is connected with the feed port of the third material ejector (17); the fan (11) is connected with the air inlet of the first air separator (12), two air outlets of the first air separator (12) are connected with the air inlets of the first material ejector (13) and the second air separator (15) respectively, the mixed material discharge port of the first material ejector (13) is connected with the other feed port of the second material ejector (16), the mixed material discharge port of the second material ejector (16) is connected with the underground coal bunker, two air outlets of the second air separator (15) are connected with the air inlets of the second material ejector (16) and the third material ejector (17) respectively, and the mixed material discharge port of the third material ejector (17) is connected with the mining wet spraying machine (7). 1
AU2014223133A 2013-02-28 2014-01-22 Method and apparatus for underground separation, conveyance and fill-up of coal and coal gangues Ceased AU2014223133B2 (en)

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Application Number Priority Date Filing Date Title
CN201310064694.0A CN103133031B (en) 2013-02-28 2013-02-28 Method and equipment for separating, conveying and filling underground coal and gangues
CN201310064694.0 2013-02-28
PCT/CN2014/071055 WO2014131324A1 (en) 2013-02-28 2014-01-22 Method and apparatus for underground separation, conveyance and fill-up of coal and coal gangues

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AU2014223133B2 true AU2014223133B2 (en) 2016-02-04

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AU (1) AU2014223133B2 (en)
DE (1) DE112014000131T5 (en)
WO (1) WO2014131324A1 (en)
ZA (1) ZA201409236B (en)

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CN104632276B (en) * 2014-12-05 2016-06-15 新汶矿业集团有限责任公司 Continuous strength coal mining with gangue backfilling system
CN106089208B (en) * 2016-07-25 2018-04-24 四川大学 Coal resource stream based on TBM mutually develops equipment and development approach
CN109403974A (en) * 2018-09-30 2019-03-01 中国矿业大学 A kind of mine, which picks up, unloads pumping and fills lasting exploit design method
CN109736809A (en) * 2019-01-18 2019-05-10 中国矿业大学 A kind of outdoor highwall coal goaf strength filling system and technique
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DE112014000131T5 (en) 2015-05-07
CN103133031A (en) 2013-06-05
WO2014131324A1 (en) 2014-09-04
AU2014223133A1 (en) 2015-01-22
ZA201409236B (en) 2016-07-27
CN103133031B (en) 2015-05-20

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