NL2025768B1 - Underground arrangement process based on coal gangue photoelectric separation - Google Patents

Underground arrangement process based on coal gangue photoelectric separation Download PDF

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NL2025768B1
NL2025768B1 NL2025768A NL2025768A NL2025768B1 NL 2025768 B1 NL2025768 B1 NL 2025768B1 NL 2025768 A NL2025768 A NL 2025768A NL 2025768 A NL2025768 A NL 2025768A NL 2025768 B1 NL2025768 B1 NL 2025768B1
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coal
gangue
underground
conveyor
bunker
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NL2025768A
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NL2025768A (en
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Yan Jianfei
Guo Xiaojun
Chen Denghong
Zhu Jinbo
Zhou Wei
Min Fanfei
Hu Kun
Yang Ke
Guo Yongcun
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Univ Anhui Sci & Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/14—Details or accessories
    • B07B13/16—Feed or discharge arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B15/00—Combinations of apparatus for separating solids from solids by dry methods applicable to bulk material, e.g. loose articles fit to be handled like bulk material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/02—Measures preceding sorting, e.g. arranging articles in a stream orientating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/3416—Sorting according to other particular properties according to radiation transmissivity, e.g. for light, x-rays, particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/346—Sorting according to other particular properties according to radioactive properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/36—Sorting apparatus characterised by the means used for distribution
    • B07C5/361—Processing or control devices therefor, e.g. escort memory
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/36—Sorting apparatus characterised by the means used for distribution
    • B07C5/361—Processing or control devices therefor, e.g. escort memory
    • B07C5/362—Separating or distributor mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/36—Sorting apparatus characterised by the means used for distribution
    • B07C5/363—Sorting apparatus characterised by the means used for distribution by means of air
    • B07C5/365—Sorting apparatus characterised by the means used for distribution by means of air using a single separation means
    • B07C5/366—Sorting apparatus characterised by the means used for distribution by means of air using a single separation means during free fall of the articles
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C41/00—Methods of underground or surface mining; Layouts therefor
    • E21C41/16—Methods of underground mining; Layouts therefor
    • E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00—Transport specially adapted to underground conditions
    • E21F13/06—Transport of mined material at or adjacent to the working face
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00—Methods or devices for placing filling-up materials in underground workings
    • E21F15/06—Filling-up mechanically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/005—Transportable screening plants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2201/00—Details applicable to machines for screening using sieves or gratings
    • B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Remote Sensing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Sorting Of Articles (AREA)

Abstract

The present invention discloses an underground arrangement process based on coal gangue photoelectric separation. A coal mine underground modular compact efficient separation system is built. +35 mm raw coal Whole—size separation is realized. Traditional coal gangue photoelectric separation equipment is used for 35 mm to 150 mm raw coal. Novel coal gangue photoelectric separation equipment is used for +150 mm raw coal. Through a chain type conveying belt, coal gangues are accurately positioned. Clean coal electromagnetic gas valves and gangue electromagnetic gas valves are respectively arranged, and the problems of great gravity and insufficient throwing path of big lump materials are sufficiently solved. The present invention precisely matches and cooperatively optimizes process links of coal mining, raw coal preparation, coal gangue photoelectric separation, gangue backfilling and the like, can realize underground gangue discharge of a coal mine from a source, reduces gangues lifted to the ground, reduces the transportation and filling cost, and conforms to environmental protection requirements. Meanwhile, the present invention realizes underground efficient separation of the coal gangues of the coal mine, can reduce the lifting quantity of the gangues, effectively improves the produced quantity and the production efficiency of the coal mine, and provides technical support for an underground mining—washing—filling cooperative operation of the coal mine.

Description

P100507NL00
UNDERGROUND ARRANGEMENT PROCESS BASED ON COAL GANGUE PHOTOELECTRIC SEPARATION
BACKGROUND Technical Field The present invention relates to the field of underground coal gangue separation of a coal mine, and more particularly, to an underground arrangement process based on coal gangue photoelectric separation. Related Art The domestic photoelectric separation industry started in the 1990s, rapidly entered a high-speed development period on the basis of introducing and digesting foreign technologies, gradually expanded from the initial separation and processing of grains, beans, seeds and foods to other fields, and began to be used on trial in the field of coal gangue separation from around 2014. In 2014, a GDRT intelligent dry process separation system was used on trial in Liujia Coal Mine, Pingzhuang, China Guodian Corporation. In 2015, a KRS intelligent coal dry process separation system test was performed by Datong Coal Mine Group aboveground, the field gangue discharge efficiency reached 85% or above, the equipment was simple, and the economic benefits were obvious. In 2016, a BIRTLEY dual-energy X-ray coal gangue separation test was performed by Hancheng Mining Group aboveground, the separation precision was about 85%, and the test condition was integrally good. At present, coal gangue TDS intelligent dry separation equipment and KRS intelligent dry separation equipment developed based on an X-ray technology have been successfully applied to coal preparation plants, and have achieved good effects. At present, major coal gangue separation methods at home and abroad include gravity separation, floating separation, photoelectric separation technologies, and fluidized bed dry process coal separation. The methods applicable to underground coal separation and gangue discharge mainly include photoelectric separation and gravity separation. The gravity separation includes heavy medium shallow groove gangue discharge, movable sieve jigging gangue discharge, air chamber jigging gangue discharge, and composite dry process gangue discharge. The feeding particle size of a heavy medium shallow groove separation machine is 300 to 25 mm, the processing capacity of single piece of equipment can reach 300 t/h, and the occupied area of the equipment is
P100507NL00 about 30 m? such as one adopted by Jiyang Coal Mine, Shandong Energy Xinwen Mining Group. The feeding particle size of a movable sieve jig is 400 to 25 mm, the unit processing capacity of single piece of equipment is 60 to 110 t/m?:h, and the occupied area is about 36 m?, such as one adopted by Xiezhuang Coal Mine of Shandong Energy Xinwen Mining Group in 2009 and Tangshan Coal Mine of Kailuan Group in 2013. The feeding particle size of an air chamber jig is 150 to 25 mm, and the processing capacity of single piece of equipment is 280 to 380 t/h, such as one adopted by Xingdong Coal Mine of Jizhong Energy Resources Co, Ltd. in 2013. The composite dry process coal preparation method can effectively separate 80 to 6 mm-size lump coal, the processing capacity of single piece of equipment is 10 t/h to 480 t/h, and the occupied area of the equipment is 84 to 723 m?. The photoelectric separation technology is applied to the field of coal gangue separation. Compared with a conventional coal separation method, the photoelectric separation technology has the advantages of high speed, high precision, high modularization and integration expansibility, low operation cost, low energy consumption, easy operation and maintenance, no need of water and the like, and has rapidly developed in the coal separation industry in recent years, for example, Hancheng Mining Group introduced dual-energy X-ray coal gangue separation equipment of BIRTLEY company in the United States for aboveground separation in 2016, and the separation precision was about 85%. A domestically self-developed coal gangue photoelectric separation machine has developed rapidly in recent years.
However, reports and application cases of underground application of the coal gangue photoelectric separation technology to coal mines have not been found at home and abroad. The main reasons are that the equipment for deep underground coal gangue separation needs a modularized and lightweight structure design and space layout, a traditional ground laminated arrangement concept needs to be broken through, and the space-time connection of each operation unit in a technical flow process needs to be optimized.
SUMMARY In order to overcome the defects mentioned in the related art, the objective of the present invention is to provide an underground arrangement process based on coal gangue photoelectric separation. The present invention provides the underground arrangement process based on coal gangue photoelectric separation, which breaks through the
P100507NL00 traditional ground laminated arrangement concept, and optimizes the time-space connection of each operation unit in the technical flow process. A coal mine underground modular compact efficient separation system is built. +35 mm raw coal whole-size separation is realized. Traditional coal gangue photoelectric separation equipment is used for 35 mm to 150 mm raw coal. Novel coal gangue photoelectric separation equipment is used for +150 mm raw coal. Through a chain type conveying belt, coal gangues are accurately positioned. Clean coal electromagnetic gas valves and gangue electromagnetic gas valves are respectively arranged, and the problems of great gravity and insufficient throwing path of big lump materials are sufficiently solved. The present invention precisely matches and cooperatively optimizes process links of coal mining, raw coal preparation, coal gangue photoelectric separation, gangue backfilling and the like, can realize underground gangue discharge of a coal mine from a source, reduces gangues lifted to the ground, reduces the transportation and filling cost, and conforms to environmental protection requirements.
The present invention realizes underground efficient separation of the coal gangues of the coal mine, can reduce the lifting quantity of the gangues, effectively improves the produced quantity and the production efficiency of the coal mine, and provides technical support for an underground mining-washing-filling cooperative operation of the coal mine. The present invention does not have special requirements for an underground roadway and chamber of the coal mine, and is applicable to a separation process of an underground narrow chamber space.
Meanwhile, a coal gangue photoelectric separation process designed by the present invention 1s arranged along the underground roadway of the coal mine, realizes +35 mm-size raw coal whole-size separation, and is suitable for a coal mine with a great content of +150 mm size raw coal.
The objective of the present invention may be achieved by the following technical solution: An underground arrangement process based on coal gangue photoelectric separation includes the following steps: I. cutting raw coal of a fully mechanized coal bed by a coal mining machine, enabling the cut raw coal to fall onto a first conveying belt arranged below, the first conveying belt being arranged along a roadway, and making angle regulation to convey
P100507NL00 the raw coal to a three-stage sieving vibration sieve;
II. since sieve holes of two layers of sieve plates of the three-stage sieving vibration sieve are respectively 150 mm and 35 mm, enabling materials greater than 150 mm to fall onto a fourth conveying belt from a position above the first-layer sieve plate, enabling fine-particle raw coal less than 35 mm to fall onto a second conveying belt after being sieved through the sieve holes of the second-layer sieve plate, then conveying the fine-particle raw coal to a ground coal preparation plant, and enabling materials of 35 mm to 150 mm to fall onto a third conveying belt;
III. obtaining concrete positions of clean coal and gangues on the third conveying belt through data analysis by a first computer terminal, controlling opening of an electromagnetic gas valve according to a falling path of the coal and the gangues, instantly opening the electromagnetic gas valve when the gangues fall to blow the gangues to a first gangue cabin in front, and enabling the electromagnetic gas valve to not act when the clean coal falls, so that the clean coal falls into a first clean coal cabin according to the original path;
IV. conveying clean coal of 35 mm to 150 mm to a ground coal cabin by a fifth conveying belt, conveying gangues of 35 mm to 150 mm to an underground gangue cabin for buffer storage by a sixth conveying belt, and then conveying the gangues to an underground filling working face;
V. transferring the materials on the fourth conveying belt onto a chain type conveying belt, a dual-energy X-ray emitting source being arranged above the chain type conveying belt, fast processing signals fed back by dual-energy X rays by a second computer based on a gray value and a substance attribute value R, judging whether currently penetrated materials are clean coal or gangues, and judging a material falling position according to a moving path of the chain type conveying belt; and if the falling materials are the gangues, opening gangue electromagnetic gas valves arranged above to blow the materials downward diagonally to enter a second gangue cabin, and if the falling materials are the clean coal, opening clean coal electromagnetic gas valves arranged below to blow the materials upward diagonally, so that the clean coal falls into a second clean coal cabin; and
VI. conveying the clean coal to the ground coal cabin by a seventh conveying belt, conveying the gangues to the underground gangue cabin for buffer storage by an eighth
P100507NL00 conveying belt, and then conveying the gangues to the underground filling working face.
Further, the first conveying belt is arranged below the coal mining machine. An end portion of the first conveying belt is connected with a feeding inlet of the three-stage sieving vibration sieve. The second conveying belt, the third conveying belt, and the 5 fourth conveying belt are respectively arranged below the three-stage sieving vibration sieve, and the three-stage sieving vibration sieve is provided with the two layers of sieve plates.
Further, an X-ray emitting source is arranged above the third conveying belt. The X-ray emitting source is connected with a first computer. The first computer is connected with a first high-pressure gas tank and the electromagnetic gas valve. The electromagnetic gas valve is arranged below the third conveying belt, and a gas nozzle is tilted upward, and right faces the falling path of the materials.
Further, the first clean coal cabin and the first gangue cabin are respectively arranged below a lateral end of the third conveying belt. A first dust removing machine is arranged on the lateral upper side of the first clean coal cabin and the first gangue cabin. The fifth conveying belt and the sixth conveying belt are respectively arranged below the first clean coal cabin and the first gangue cabin. The fifth conveying belt is connected with the ground coal cabin along the roadway. The sixth conveying belt is connected with the underground gangue cabin and the underground filling working face.
Further, an end portion of the fourth conveying belt is connected with the chain type conveying belt. The dual-energy X-ray emitting source is arranged above the chain type conveying belt. The dual-energy X-ray emitting source is connected with the second computer. The second computer is connected with a second high-pressure gas tank. The second high-pressure gas tank is connected with the clean coal electromagnetic gas valves and the gangue electromagnetic gas valves.
Further, the second gangue cabin and the second clean coal cabin are respectively arranged below a lateral end of the chain type conveying belt. A second dust removing machine is arranged on the lateral upper side of the second gangue cabin and the second clean coal cabin. The eighth conveying belt and the seventh conveying belt are respectively arranged below the second gangue cabin and the second clean coal cabin. The seventh conveying belt is connected with the ground coal cabin. The eighth conveying belt is connected with the underground gangue cabin and the underground
P100507NL00 filling working face.
Further, an analysis basis of the first computer and the second computer in step II and step V is the substance attribute value R, only related to the equivalent atomic number of a penetrated substance. The substance attribute value R of the coal is 1.30 to
1.35. The substance attribute value R of the gangues is less than 1.20. Materials with R>1.30 are judged as the coal. Materials with R<1.30 are judged as the gangues.
The present invention has the following beneficial effects:
1. The present invention provides the underground arrangement process based on coal gangue photoelectric separation, which breaks through the traditional ground laminated arrangement concept, and optimizes the time-space connection of each operation unit in the technical flow process. A coal mine underground modular compact efficient separation system is built. +35 mm raw coal whole-size separation is realized. Traditional coal gangue photoelectric separation equipment is used for 35 mm to 150 mm raw coal. Novel coal gangue photoelectric separation equipment is used for +150 mm raw coal. Through the chain type conveying belt, the coal gangues are accurately positioned. The clean coal electromagnetic gas valves and the gangue electromagnetic gas valves are respectively arranged, and the problems of great gravity and insufficient throwing path of big lump materials are sufficiently solved. The present invention precisely matches and cooperatively optimizes process links of coal mining, raw coal preparation, coal gangue photoelectric separation, gangue backfilling and the like, can realize underground gangue discharge of the coal mine from the source, reduces the gangues lifted to the ground, reduces the transportation and filling cost, and conforms to environmental protection requirements.
2. The present invention realizes underground efficient separation of the coal gangues of the coal mine, can reduce the lifting quantity of the gangues, effectively improves the produced quantity and the production efficiency of the coal mine, and provides technical support for an underground mining-washing-filling cooperative operation of the coal mine. The present invention does not have special requirements for an underground roadway and chamber of the coal mine, and is applicable to a separation process of an underground narrow chamber space.
3. A coal gangue photoelectric separation process designed by the present invention is arranged along the underground roadway of the coal mine, realizes +35 mm-size raw
P100507NL00 coal whole-size separation, and is suitable for a coal mine with a great content of +150 mm size raw coal.
BRIEF DESCRIPTION OF THE DRAWINGS The present invention is further described below with reference to the accompanying drawings. Figure 1 is a schematic diagram of an overall structure of the present invention. Figure 2 is a schematic working diagram of a coal mining machine of the present invention. Figure 3 is a schematic working diagram of a three-stage sieving vibration sieve of the present invention. Figure 4 is a schematic diagram of 35 mm to 150 mm clean coal and gangue separation of the present invention. Figure 5 is a schematic diagram of separation of clean coal and gangues greater than 150 mm of the present invention.
DETAILED DESCRIPTION The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments instead of all embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. In the description of the present invention, it should be understood that orientation or position relationships indicated by the terms such as "opening", "above", "below", "thickness", "top", "middle", "length", "inside", and "around" are used only for ease and brevity of illustration and description, rather than indicating or implying that the mentioned component or element must have a particular orientation or must be constructed and operated in a particular orientation. Therefore, such terms should not be construed as limiting of the present invention. An underground arrangement device based on coal gangue photoelectric separation, as shown in Figure 1, includes a coal mining machine. A first conveying belt is arranged below the coal mining machine. An end portion of the first conveying belt is connected
P100507NL00 with a feeding inlet of a three-stage sieving vibration sieve. A second conveying belt, a third conveying belt, and a fourth conveying belt are respectively arranged below the three-stage sieving vibration sieve. The three-stage sieving vibration sieve is provided with two layers of sieve plates. Sieve holes of the first-layer sieve plate and the second-layer sieve plate are respectively 150 mm and 35 mm. The first-layer sieve plate sieves out materials greater than 150 mm. The materials greater than 150 mm fall onto a fourth conveying belt from a position above the first-layer sieve plate. Fine-particle raw coal less than 35 mm falls onto the second conveying belt after being sieved through the sieve holes of the second-layer sieve plate, and is then conveyed to a ground coal preparation plant. Materials between the first-layer sieve plate and the second-layer sieve plate are materials of 35 mm to 150 mm. The materials of 35 mm to 150 mm fall onto the third conveying belt.
An X-ray emitting source is arranged above the third conveying belt. The X-ray emitting source is connected with a first computer. The first computer is connected with a first high-pressure gas tank and an electromagnetic gas valve. The electromagnetic gas valve is arranged below the third conveying belt, and a gas nozzle is tilted upward, and right faces a falling path of the materials. A first clean coal cabin and a first gangue cabin are respectively arranged below a lateral end of the third conveying belt. A first dust removing machine is arranged on the lateral upper side of the first clean coal cabin and the first gangue cabin. A fifth conveying belt and a sixth conveying belt are respectively arranged below the first clean coal cabin and the first gangue cabin. The fifth conveying belt is connected with a ground coal cabin along a roadway. The sixth conveying belt is connected with an underground gangue cabin and an underground filling working face. An end portion of the fourth conveying belt is connected with a chain type conveying belt. A dual-energy X-ray emitting source with higher penetrability is arranged above the chain type conveying belt. The dual-energy X-ray emitting source is connected with a second computer. The second computer is connected with a second high-pressure gas tank. The second high-pressure gas tank is connected with clean coal electromagnetic gas valves and gangue electromagnetic gas valves. A second gangue cabin and a second clean coal cabin are respectively arranged below a lateral end of the chain type conveying belt. A second dust removing machine is arranged on the lateral upper side of the second gangue cabin and the second clean coal cabin. An eighth conveying belt and a seventh
P100507NL00 conveying belt are respectively arranged below the second gangue cabin and the second clean coal cabin. The seventh conveying belt is connected with the ground coal cabin. The eighth conveying belt is connected with the underground gangue cabin and the underground filling working face.
An underground arrangement process based on coal gangue photoelectric separation includes the following steps: I. Raw coal of a fully mechanized coal bed is cut by the coal mining machine, and then falls onto the first conveying belt arranged below. The first conveying belt is arranged along the roadway. Certain angle regulation is made to convey the raw coal to the three-stage sieving vibration sieve.
II. The sieve holes of the two layers of sieve plates of the three-stage sieving vibration sieve are respectively 150 mm and 35 mm. Materials greater than 150 mm fall onto the fourth conveying belt from the position above the first-layer sieve plate. Fine-particle raw coal less than 35 mm falls onto the second conveying belt after being sieved through the sieve holes of the second-layer sieve plate. Materials of 35 mm to 150 mm fall onto the third conveying belt.
ITI. The X-ray emitting source is arranged above a horizontal belt at a back portion of the third conveying belt. The density of clean coal and gangues has importance influence on X-ray intensity attenuation. The imaging feature differences of the clean coal and the gangues in X rays are obvious. A first computer terminal obtains concrete positions of the clean coal and the gangues on the third conveying belt through data analysis. Opening of the electromagnetic gas valve is controlled according to the falling path of the coal and the gangues. The electromagnetic gas valve is arranged below the third conveying belt. The gas nozzle is tilted upward, and right faces the falling path of the materials. When the gangues fall, the electromagnetic gas valve is instantly opened to blow the gangues to the first gangue cabin in front. When the clean coal falls, the electromagnetic gas valve does not act, so that the clean coal falls into the first clean coal cabin according to the original path.
IV. Clean coal of 35 mm to 150 mm is conveyed to the ground coal cabin by the fifth conveying belt. Gangues of 35 mm to 150 mm are conveyed to the underground gangue cabin for buffer storage by the sixth conveying belt, and are then conveyed to the underground filling working face. The repeated ineffective transportation of the gangues
P100507NL00 is avoided. The processing capacity of the mine can be effectively improved.
V. Oversize products on the first-layer sieve plate of the three-stage sieving vibration sieve are +150 mm materials. The +150 mm materials are separated by novel coal gangue photoelectric separation equipment. The +150 mm materials are conveyed by the fourth conveying belt. The +150 mm materials have big particle sizes and heavy weight, and may slip on a rubber conveying belt, so that feeding materials of the novel coal gangue photoelectric separation equipment are conveyed by the chain type conveying belt. The materials do not slip in the conveying process, so that a moving path of the materials can be more precisely calculated. The +150 mm materials are transferred onto the chain type conveying belt by the fourth conveying belt. The dual-energy X-ray emitting source with higher penetrability is arranged above the chain type conveying belt. The second computer fast processes signals fed back by dual-energy X rays based on a gray value and a substance attribute value R. Whether currently penetrated materials are clean coal or gangues is judged, and the time of the materials falling to a No.1 region or a No. 2 region is judged according to a moving path of the chain type conveying belt. If the falling materials are judged as the gangues, when the materials enter the No. 1 region, the gangue electromagnetic gas valves arranged above are opened to blow the materials downward diagonally to enter the second gangue cabin. If the falling materials are judged as the clean coal, when the materials enter the No. 2 region, the clean coal electromagnetic gas valves arranged below are opened to blow the materials upward diagonally, so that the clean coal falls into the second clean coal cabin. The novel coal gangue photoelectric separation equipment is respectively provided with the clean coal electromagnetic gas valves and the gangue electromagnetic gas valves to sufficiently solve the problems of great particle size, great gravity and insufficient throwing path of materials. The gangue electromagnetic gas valves are arranged above to blow the gangues downward diagonally. The clean coal electromagnetic gas valves are arranged below to blow the clean coal upward diagonally. The arrangement modes of the two groups of electromagnetic gas valves are more scientific. The +150 mm clean coal is conveyed to the ground coal cabin by the seventh conveying belt. The +150 mm gangues are conveyed to the underground gangue cabin for buffer storage by the eighth conveying belt, and are then conveyed to the underground filling working face. The repeated ineffective transportation of the gangues is avoided. The processing capacity of the coal mine can be effectively improved
P100507NL00 Additionally, a clean coal and gangue recognition method used by the present invention is a method based on joint action of the gray value and the substance attribute value R. A traditional method for distinguishing the clean coal and the gangues through X rays achieves recognition singly in accordance to the gray value. However, in a practical production process, the particle size distribution range of the raw coal is very wide, the thicknesses, the shapes and the sizes are nonuniform, and the thicknesses also have obvious influence on the gray value, so that the coal and the gangues are difficult to be accurately distinguished by a gray value comparison method. The substance attribute value R is only related to the equivalent atomic number of a penetrated substance. A great quantity of test data show that the substance attribute value R of the coal is 1.30 to 1.35, and the substance attribute value R of the gangues is less than 1.20. According to the method used by the present invention, the gray value is firstly used to directly judge whether the materials are the clean coal or the gangues. If the gray value is in a critical interval and cannot be used for accurate judgment, and the value R is introduced for judgment. Materials with R>1.30 are judged as the coal, and materials with R<1.30 are judged as the gangues.
The present invention creatively provides the underground arrangement process based on coal gangue photoelectric separation, which breaks through the traditional ground laminated arrangement concept, and optimizes the time-space connection of each operation unit in the technical flow process. A coal mine underground modular compact efficient separation system is built. +35 mm raw coal whole-size separation is realized. Traditional coal gangue photoelectric separation equipment is used for 35 mm to 150 mm raw coal. Novel coal gangue photoelectric separation equipment is used for +150 mm raw coal. Through the chain type conveying belt, the coal gangues are accurately positioned.
The clean coal electromagnetic gas valves and the gangue electromagnetic gas valves are respectively arranged, and the problems of great gravity and insufficient throwing path of big lump materials are sufficiently solved. The present invention precisely matches and cooperatively optimizes process links of coal mining, raw coal preparation, coal gangue photoelectric separation, gangue backfilling and the like, can realize underground gangue discharge of a coal mine from the source, reduces the gangues lifted to the ground, reduces the transportation and filling cost, and conforms to environmental protection requirements.
P100507NL00 In the descriptions of this specification, descriptions using reference terms such as "an embodiment”, "an example", or "a specific example" mean that specific characteristics, structures, materials, or features described with reference to the embodiment or example are included in at least one embodiment or example of the present invention.
In this specification, schematic descriptions of the foregoing terms do not necessarily directed at a same embodiment or example.
Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in an appropriate manner.
The basic principles, main features and advantages of the present invention have been shown and described above.
Those skilled in the art should understand that the present invention is not limited by the foregoing embodiments, descriptions in the foregoing embodiments and the specification merely describe the principles of the present invention, various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall all fall within the protection scope of the present invention.

Claims (7)

CONCLUSIESCONCLUSIONS I.i. Ondergronds lay-outproces gebaseerd op foto-elektrische scheiding van steenkoolgang, omvattende de volgende stappen:Underground layout process based on photoelectric separation of coal corridor, comprising the following steps: I. nadat een koolmijnbouwinrichting ruwe steenkool van de volledig gemechaniseerde steenkoollaag heeft gesneden, laten vallen van de ruwe steenkool op een eerste transportband die eronder is opgesteld, waarbij de eerste transportband langs een rijbaan opgesteld is en onder een hoek is afgesteld om de ruwe steenkool naar een drietrapszevend trilzeefscherm te transporteren;I. After a coal mining plant has cut raw coal from the fully mechanized coal seam, dropping the raw coal onto a first conveyor belt positioned below it, the first conveyor belt being arranged along a roadway and angled to transport the raw coal to to transport a three-stage vibrating screen; II. aangezien het drietrapszevend trilzeefscherm twee lagen zeefplaten met zeef gaten van respectievelijk 150 mm en 35 mm heeft, doen vallen van materiaal groter dan 150 mm vanaf de bovenkant van het eerste scherm naar een vierde transportband en de fijnkorrelige ruwe steenkool van minder dan 35 mm doen vallen na te zijn gezeefd vanaf de zeefgaten van de tweede zeefplaat naar een tweede transportband en vervolgens naar een gemalen steenkool voorbereidingsinstallatie transporteren en het materiaal van 35-150 mm doen vallen op een derde transportband;II. since the three-stage vibrating sieve screen has two layers of sieve plates with sieve holes of 150mm and 35mm respectively, drop material larger than 150mm from the top of the first screen to a fourth conveyor and drop the fine-grained raw coal less than 35mm after being sieved from the sieve holes of the second sieve plate to a second conveyor belt and then convey to a crushed coal preparation plant and drop the 35-150mm material onto a third conveyor belt; II. verkrijgen door een eerste computerterminal van de specifieke positie van schone steenkool en gangue (afvalsteen) op de derde transportband door middel van data-analyse en regelt de opening van de elektromagnetische gasklep volgens het vallende pad van steenkool en gangue, dat wil zeggen wanneer het gangue valt, opent de elektromagnetische gasklep ogenblikkelijk, blaast de gangue naar de eerste ganguebunker verderop en wanneer de schone steenkool valt, werkt de elektromagnetische gasklep niet en valt de schone steenkool in de eerste schone steenkoolbunker volgens het oorspronkelijke traject;II. obtain by a first computer terminal of the specific position of clean coal and gangue (waste rock) on the third conveyor belt through data analysis, and controls the opening of the electromagnetic gas valve according to the falling path of coal and gangue, that is, when the gangue falls, the electromagnetic gas valve opens instantaneously, blows the gangue to the first gangue bunker ahead, and when the clean coal falls, the electromagnetic gas valve does not work, and the clean coal falls into the first clean coal bunker according to the original trajectory; IV. het schone steenkool van 35-150 mm wordt getransporteerd van de vijfde transportband naar de gemalen steenkoolbunker en het gangue van 35-150 mm wordt getransporteerd van de zesde transportband naar de ondergrondse ganguebunker voor bufferopslag en vervolgens naar het ondergrondse vulwerkvlak getransporteerd;IV. the 35-150mm clean coal is conveyed from the fifth conveyor to the crushed coal bunker, and the 35-150mm gangue is conveyed from the sixth conveyor to the underground gangue bunker for buffer storage, and then conveyed to the underground filling plane; V. het materiaal op de vierde transportband wordt overgebracht naar de kettingtransportband en de röntgenstralingbron met dubbele energie wordt boven de kettingtransportband gerangschikt, en de tweede computer verwerkt snel signalen die worden geretourneerd door röntgenstralingbron met dubbele energie op basis van de grijswaarde en de materiaaleigenschap R-waarde om te bepalen of het huidige penetrerende materiaal schone steenkool of gangue is en bepaalt, volgens het bewegingspad van de kettingtransportband, de locatie van de materiaalval, dat wil zeggen wanneer het gangue valt, opent de boven geplaatste elektromagnetische gasklep voor gangue en blaast het materiaal diagonaal naar beneden om het in de tweede ganguebunker te laten komen, en wanneer de schone steenkool valt, opent de onderaan geplaatste elektromagnetische gasklep voor schone steenkool en blaast het materiaal diagonaal omhoog om de schone steenkool in de tweede schone steenkoolbunker te laten vallen; VI. de schone steenkool wordt van de zevende transportband naar de gemalen steenkoolbunker getransporteerd en het gangue wordt door de achtste transportband naar de ondergrondse ganguebunker voor bufferopslag gebracht en vervolgens naar het ondergrondse vulwerkvlak getransporteerd.V. The material on the fourth conveyor is transferred to the chain conveyor, and the dual-energy X-ray source is arranged above the chain conveyor, and the second computer quickly processes signals returned from dual-energy X-ray source based on the gray value and the material property R- value to determine whether the current penetrating material is clean coal or gangue and determine, according to the movement path of the chain conveyor, the location of the material fall, that is, when the gangue falls, the above-placed solenoid gas valve for gangue opens and blows the material downwards diagonally to make it into the second gangue bunker, and when the clean coal falls, the clean coal solenoid gas valve at the bottom opens and the material blows up diagonally to drop the clean coal into the second clean coal bunker; VI. the clean coal is conveyed from the seventh conveyor to the crushed coal bunker, and the gangue is conveyed by the eighth conveyor to the underground gangue bunker for buffer storage, and then transported to the underground filling plane. 2. Ondergronds lay-outproces gebaseerd op foto-elektrische scheiding van steenkool-gangue volgens conclusie 1, met het kenmerk, dat onder de steenkoolschaar de eerste transportband is voorzien en het uiteinde van de eerste transportband is verbonden met de toevoerinlaat van het drietraps zeeftrilscherm, en de tweede transportband, de derde transportband en de vierde transportband zijn respectievelijk onder het drietraps zeeftrilscherm voorzien en het drietraps zeeftrilscherm is voorzien van twee lagen zeefplaten.The underground layout process based on photoelectric separation of coal gangue according to claim 1, characterized in that the first conveyor belt is provided below the coal shear, and the end of the first conveyor belt is connected to the feed inlet of the three-stage vibrating screen, and the second conveyor, the third conveyor and the fourth conveyor are respectively provided below the three-stage vibrating screen, and the three-stage vibrating screen is provided with two layers of sieve plates. 3. Ondergronds lay-outproces gebaseerd op foto-elektrische scheiding van steenkool-gangue volgens conclusie 2, met het kenmerk, dat boven de derde transportband een röntgenstralingbron is voorzien en de röntgenstralingbron is verbonden op de eerste computer en de eerste computer is verbonden met een eerste hogedrukgastank en een elektromagnetische gasklep en de elektromagnetische gasklep is onder de derde transportband voorzien en het gasmondstuk helt naar boven gericht naar het vallende pad van het materiaal.The underground layout process based on photoelectric separation of coal gangue according to claim 2, characterized in that an X-ray source is provided above the third conveyor belt and the X-ray source is connected to the first computer and the first computer is connected to a first high-pressure gas tank and a gas solenoid valve, and the gas solenoid valve is provided below the third conveyor, and the gas nozzle is inclined upward toward the falling path of the material. 4. Ondergronds lay-outproces gebaseerd op foto-elektrische scheiding van steenkool-gangue volgens conclusie 3, met het kenmerk, dat onder de zijeinden van de derde transportband respectievelijk een eerste schone steenkoolbunker en een eerste ganguebunker zijn voorzien, en boven de zijeinden van de eerste steenkoolbunker en de eerste ganguebunker is een eerste stofverwijderaar voorzien en onder de eerste steenkoolbunker en de eerste ganguebunker zijn respectievelijk een vijfde transportband en een zesde transportband voorzien, en de vijfde transportband is verbonden met de gemalen steenkoolbunker langs de rijbaan en de zesde transportband is verbonden met de ondergrondse ganguebunker en het ondergrondse vulwerkvlak.The underground layout process based on photoelectric separation of coal gangue according to claim 3, characterized in that a first clean coal bunker and a first gangue bunker are provided respectively below the side ends of the third conveyor belt, and above the side ends of the first coal bunker and the first gangue bunker, a first dust remover is provided, and under the first coal bunker and the first gangue bunker, a fifth conveyor and a sixth conveyor are provided, respectively, and the fifth conveyor is connected to the crushed coal bunker along the roadway, and the sixth conveyor is connected with the underground gangue bunker and the underground filling surface. 5. Ondergronds lay-outproces gebaseerd op foto-elektrische scheiding van steenkool-gangue volgens conclusie 2, met het kenmerk, dat het einde van de vierde transportband met is een kettingtransportband verbonden, en boven de kettingtransportband 1s een röntgenstralingbron met dubbele energie voorzien en de röntgenstralingbron met dubbele energie is verbonden met de tweede computer, en de tweede computer is verbonden met een tweede hogedrukgastank en de tweede hogedrukgastank is verbonden met een elektromagnetische gasklep voor schone steenkool en een elektromagnetische gasklep voor gangue.The underground layout process based on photoelectric separation of coal gangue according to claim 2, characterized in that the end of the fourth conveyor belt is connected to a chain conveyor belt, and above the chain conveyor belt 1s provides a dual energy X-ray source and the dual energy X-ray source is connected to the second computer, and the second computer is connected to a second high pressure gas tank, and the second high pressure gas tank is connected to a clean coal electromagnetic gas valve and a gangue solenoid gas valve. 6. Ondergronds lay-outproces gebaseerd op foto-elektrische scheiding van steenkool-gangue volgens conclusie 5, met het kenmerk, dat onder de zijeinden van de kettingtransportband respectievelijk een tweede ganguebunker en een tweede schone steenkoolbunker zijn voorzien, en boven de zijeinden van de tweede ganguebunker en de tweede schone steenkoolbunker is een tweede stofverwijderaar voorzien en onder de tweede ganguebunker en de tweede schone steenkoolbunker zijn respectievelijk een achtste transportband en een zevende transportband voorzien, en de zevende transportband 1s verbonden met de gemalen steenkoolbunker en de achtste transportband is verbonden met de ondergrondse ganguebunker en het ondergrondse vulwerkvlak.Underground layout process based on photoelectric separation of coal gangue according to claim 5, characterized in that a second gangue bunker and a second clean coal bunker are provided respectively below the side ends of the chain conveyor, and above the side ends of the second gangue bunker and the second clean coal bunker, a second dust remover is provided, and under the second gangue bunker and the second clean coal bunker, an eighth conveyor and a seventh conveyor are provided, respectively, and the seventh conveyor 1s connected to the crushed coal bunker, and the eighth conveyor is connected to the underground gangue bunker and the underground filling surface. 7. Ondergronds lay-outproces gebaseerd op foto-elektrische scheiding van steenkool-gangue volgens conclusie 1, met het kenmerk, dat de basis van de analyse van de eerste en tweede computer in de tweede en vijfde stap is: de materiaaleigenschap R-waarde is alleen gerelateerd aan het equivalente atoomnummer van het gepenetreerde materiaal en de materiaaleigenschap R-waarde van steenkool is 1,30-1,35, en de materiaaleigenschap R-waarde van gangue is minder dan 1,20 en de materialen met R2>130 worden beoordeeld als steenkool en de materialen met R<1,30 worden beoordeeld als gangue.The underground layout process based on photoelectric separation of coal gangue according to claim 1, characterized in that the basis of the analysis of the first and second computers in the second and fifth step is: the material property is R value only related to the equivalent atomic number of the penetrated material and the material property R value of coal is 1.30-1.35, and the material property R value of gangue is less than 1.20 and the materials with R2>130 are evaluated as coal and the materials with R<1.30 are rated as gangue.
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