AU2019229395A1

AU2019229395A1 - Large-Size Intelligent Coal Drawing Experimental Platform and Test Method

Info

Publication number: AU2019229395A1
Application number: AU2019229395A
Authority: AU
Inventors: Lianghui Li; Jiachen Wang; Weijie Wei; Shengli Yang; Jinwang ZHANG
Original assignee: China University of Mining and Technology Beijing CUMTB
Current assignee: China University of Mining and Technology Beijing CUMTB
Priority date: 2019-03-18
Filing date: 2019-09-12
Publication date: 2020-10-08
Anticipated expiration: 2039-09-12
Also published as: CN109727522B; CN109727522A; AU2019229395B2

Abstract

The present invention discloses a large-size intelligent coal drawing experimental platform and a test method. The large-size intelligent coal drawing experimental platform 5 includes an experimental box body, a simulation hydraulic support system, a support moving device, a feeding device, a discharging device, a coal-gangue identification system, and an operation console; the support moving device is connected to the simulation hydraulic support system and can drive the simulation hydraulic support system to move; the feeding device is disposed at one side of the experimental box body and can pave coal and gangue on an upper 10 portion of the simulation hydraulic support system uniformly; the discharging device is disposed at a lower side of a coal drawing port; the coal-gangue identification system is disposed at one side of the simulation hydraulic support system, and is located at an upper side of the discharging device; the coal-gangue identification system can automatically identify the drawn coal and gangue, and transmits a signal to the operation console to control 15 opening and closing the coal drawing port and the discharging device; and both the simulation hydraulic support system and the support moving device are controlled by the operation console. The present invention implements an indoor intelligent coal drawing operation and further perfects an existing coal-gangue movement rule. 1/3 .2 4 0 8 208 302 207 0 301 202 203 7 FIG. 1 2F9 -211 215 213 n'r FIG. 2

Description

1/3

.2 0 4

8 208

302 207 0 301 202 203 7

FIG. 1

2F9

-211

215 213

n'r FIG. 2

LARGE-SIZE INTELLIGENT COAL DRAWING EXPERIMENTAL PLATFORM AND TEST METHOD TECHNICAL FIELD The present invention relates to the technical field of mine engineering, and in particular to a large-size intelligent coal drawing experimental platform and a test method.

BACKGROUND Since a fully-mechanized caving mining technology was introduced to China, a world famous achievement has been made through nearly 40 years of development. At present, due o to a limitation of a site condition, an indoor simulation experiment is one of major research methods of the fully-mechanized caving mining technology. In combination with a result of each scholar in an indoor experiment at present, it is found that an existing indoor experimental platform has a small size generally, and a coal-gangue simulation particle used is white and cyan Bali stone mainly. Although a top coal drawing rule can be researched to a certain extent, there are still problems that top coal cannot be crushed secondarily, a movement rule of large-block top coal in a site cannot be reflected completely due to a relatively small simulation particle, the intelligence level of the experimental platform is low, the artificial operation error is large and the like.

o SUMMARY An objective of the present invention is to provide a large-size intelligent coal drawing experimental platform and a test method, to solve the above-mentioned problems of the prior art, implement an indoor intelligent coal drawing operation and further perfect an existing coal-gangue movement rule. To achieve the above purpose, the present invention provides the following technical solutions. The present invention provides a large-size intelligent coal drawing experimental platform, including: an experimental box body, a simulation hydraulic support system, a support moving device, a feeding device, a discharging device, a coal-gangue identification system, and an operation console, where the simulation hydraulic support system is disposed in the experimental box body; the support moving device is connected to the simulation hydraulic support system and can drive the simulation hydraulic support system to move; the feeding device is disposed at one side of the experimental box body and can pave coal and gangue on an upper portion of the simulation hydraulic support system respectively and uniformly from the bottom up; the feeding device can be moved freely; the discharging device is disposed at a lower side of a coal drawing port of the simulation hydraulic support system; the coal-gangue identification system is disposed at one side of the simulation hydraulic support system, and is located at an upper side of the discharging device; the coal-gangue identification system can automatically identify the drawn coal and gangue, and transmits an automatic identification signal to the operation console; when a proportion of the drawn coal and gangue reaches to a certain value, the operation console automatically controls the simulation hydraulic support system to close the coal drawing port, and controls the o discharging device to automatically close; and both the simulation hydraulic support system and the support moving device are controlled by the operation console. Preferably, the simulation hydraulic support system includes a guard plate, a top beam, a shield beam, a tail beam and a tail beam insertion plate that are connected sequentially; the guard plate is opened or closed via a guard plate hydraulic cylinder; a height of the top beam is adjusted via a top beam pillar; a lower end of the top beam pillar is disposed on a front bottom plate; a front bottom plate pillar is disposed at a lower side of the front bottom plate; the shield beam is obliquely disposed and is supported by a four-bar mechanism; the tail beam is swung and rotated via a tail beam hydraulic cylinder; a hollow groove is formed on the tail beam; the tail beam insertion plate can be stretched into or out of the hollow groove via an o insertion plate hydraulic cylinder; the tail beam can be seamlessly connected to the rear bottom plate; the rear bottom plate includes a slide plate and a fixed plate; the slide plate can be slid on the fixed plate; the slide plate is connected to the front bottom plate via a chain; and a rear bottom plate pillar having an adjustable height is disposed at a lower side of the fixed plate, so that the rear bottom plate can be adjusted in a vertical direction. Preferably, the support moving device includes a step motor, a traction device and a slide rail; one end of the traction device is connected to the step motor, and the other end of the traction device is connected to the front bottom plate; and the front bottom plate can be slid on the slide rail via the front bottom plate pillar and drives the slide plate to move synchronously. Preferably, the feeding device includes a triangular support, a circulation belt and an idler wheel; the circulation belt is disposed on an inclined surface of the triangular support; a plurality of baffle plates are uniformly arranged on the circulation belt; and the idler wheel is disposed on a lower portion of the triangular support.

Preferably, the discharging device includes a support frame, a discharging belt and a roller; the discharging belt is wound on the roller; the roller is supported by the support frame; and a velocity of the discharging belt can be adjusted according to a drawn amount of the coal, so that a control accuracy of the coal-gangue identification system can be trained at different velocities. Preferably, the experimental box body is made of a transparent acrylic plate; the experimental box body is of a rectangular solid shape; an upper end of the feeding device is flush with a top portion of the experimental box body; and a geometric similarity ratio for a dimension of a model paved in the experimental box body is not smaller than 1:3. o Preferably, a plurality of buttons are arranged on the operation console. The present invention further provides a test method for a large-size intelligent coal drawing experimental platform, including the following steps: SI: adjusting each part of an experimental platform before an experiment, performing a safety inspection to remove a hidden risk, and switching on a power supply; S2: starting an operation console, adjusting a height of a top beam pillar by a button on the operation console according to a condition of a site working surface, opening a guard plate, adjusting a position of a rear bottom plate horizontally, adjusting a height of the rear bottom plate so that the rear bottom plate is seamlessly connected to a tail beam insertion plate, and adjusting the experimental platform to a state required by the experiment; o S3: opening a feeding device, and respectively paving, according to a height requirement, coal and gangue taken from the site to complete an initial model of the experiment; S4: opening a discharging device, pressing an open button of a coal drawing port on the operation console, controlling a simulation hydraulic support system to retract a tail beam insertion plate, rotating a teal beam clockwise, opening the coal drawing port to perform a coal drawing operation, and adjusting a velocity of a discharging belt according to a coal drawn amount;

S5: automatically identifying, by a coal-gangue identification system, the drawn coal and gangue, where when a proportion of the coal to the gangue reaches to a certain value, a processing signal is fed back to the operation console, and the control console controls the simulation hydraulic support system to rotate the tail beam counterclockwise and stretch out the tail beam insertion plate; closing the coal drawing port to stop coal drawing; and closing the discharging device; S6: recording experimental data such as coal drawing time, a top coal drawn amount, a form of a coal and gangue separation interface, till a coal drawing process at this time is completed; S7: setting an interval of a support moving device in advance, pressing a support moving button of the simulation hydraulic support system on the operation console to perform a support moving operation of the simulation hydraulic support system, and repeating the steps S4-S6 till a subsequent coal drawing process is completed; S8: taking remained coal and gangue out of an experimental box body via the discharging device to separate for use in a next experiment; and S9: cleaning the experimental box body, and restoring to the initial state of the o experimental platform via a button on the operation console, thus completing the whole experiment.

Compared with the prior art, the present invention achieves the following technical effects: 1. According to a large-size intelligent coal drawing experimental platform, by opening and closing a guard plate via a button operation on an operation console, rising and lowering a height of a top beam pillar and a rear bottom plate pillar, stretching and retracting a tail beam insertion plate, rotating a tail beam, and controlling a support moving device to perform support movement of a simulation hydraulic support system, and by identifying a coal-gangue proportion via a coal-gangue identification system, and automatically closing a coal drawing o port, an intelligent operation of an indoor coal drawing experiment is implemented, an artificial operation error is reduced, and the simulation hydraulic support system is hydraulically controlled, so the operation is convenient. 2. A real coal gangue raw material in a site is selected for coal drawing, so the authenticity is good; and with an experiment, an existing coal-gangue movement rule can further be perfected and an existing top coal drawing rule can be perfected, thus further researching a secondary crushing characteristic in a top coal movement process.

BRIEF DESCRIPTION OF THE DRAWINGS To describe the technical solutions in the embodiments of the present invention or in the prior art more clearly, the following briefly introduces the accompanying drawings required for describing the embodiments. Apparently, the accompanying drawings in the following description show merely some embodiments of the present invention, and a person of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts. FIG. 1 is a structural schematic diagram of a large-size intelligent coal drawing experimental platform according to the present invention. FIG. 2 is a structural schematic diagram of a simulation hydraulic support system according to the present invention. FIG. 3 is a structural schematic diagram of a feeding device according to the present invention. FIG. 4 is a structural schematic diagram of a discharging device according to the present invention. o FIG. 5 is a structural schematic diagram of an operation console according to the present invention. In the figure: 1-experimental box body, 2-simulation hydraulic support system, 3-support moving device, 4-feeding device, 5-discharging device, 6-coal-gangue identification system, 7-operation console, 8-pump station, 9-coal drawing port, 201-top beam pillar, 202-front bottom plate, 203-front bottom plate pillar, 204-four-bar mechanism, 205-slide plate, 206 chain, 207-fixed plate, 208-rear bottom plate pillar, 209-guard plate, 210-top beam, 211 shield beam, 212-tail beam, 213-tail beam insertion plate, 214-guard plate hydraulic cylinder, 215-tail beam hydraulic cylinder, 216-insertion plate hydraulic cylinder, 301-traction device, 302-slide rail, 401-triangular support, 402-circulation belt, 403-idler wheel, 501-support o frame, 502-discharging belt, 503-roller, 504-motor, 505-rotary knob, and 701-button.

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. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the disclosure without creative efforts shall fall within the protection scope of the disclosure. In the description of the present invention, it is to be understood that, orientation or position relationships indicated by terms "upper", "lower", "left" and "right" are based on the orientation or position relationships as shown in the drawings, for ease of the description of a structure and an operation manner only, rather than indicating or implying that the indicated part must have a particular orientation or be operated in a particular orientation. Therefore, these terms should not be understood as a limitation to the present invention. An objective of the present invention is to provide a large-size intelligent coal drawing experimental platform and a test method, to solve the problems of the prior art, implement an indoor intelligent coal drawing operation and further perfect an existing coal-gangue movement rule. To make the foregoing objective, features, and advantages of the present invention clearer and more comprehensible, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. As shown in FIG. 1 to FIG. 5, this embodiment provides a large-size intelligent coal o drawing experimental platform, which includes an experimental box body 1, a simulation hydraulic support system 2, a support moving device 3, a feeding device 4, a discharging device 5, a coal-gangue identification system 6, and an operation console 7. The simulation hydraulic support system 2 is disposed in the experimental box body 1. The support moving device 3 is connected to the simulation hydraulic support system 2 and can drive the simulation hydraulic support system 2 to move. The feeding device 4 is disposed at one side of the experimental box body 1 and can pave coal and gangue on an upper portion of the simulation hydraulic support system 2 respectively and uniformly from the bottom up; specifically, the coal and the gangue are respectively and uniformly paved on a top beam 210 and a rear bottom plate of the simulation hydraulic support system 2 from the bottom up. The o feeding device 4 can be moved freely. The discharging device 5 is disposed at a lower side of a coal drawing port 9 of the simulation hydraulic support system 2; specifically, the coal drawing port is an opening between a front bottom plate and the rear bottom plate of the simulation hydraulic support system 2. The coal-gangue identification system 6 is disposed at one side of the simulation hydraulic support system 2, and is located at an upper side of the discharging device 5; the coal-gangue identification system 6 can automatically identify the drawn coal and gangue, and transmits an automatic identification signal to the operation console 7; and when a proportion of the drawn coal and gangue reaches to a certain value, the operation console 7 automatically controls the simulation hydraulic support system 2 to close the coal drawing port, and controls the discharging device 5 to automatically close. Specifically, both the simulation hydraulic support system 2 and the support moving device 3 are powered by a pump station 8, and the pump station 8 is controlled by the operation console 7. The simulation hydraulic support system 2 includes a guard plate 209, a top beam 210, a shield beam 211, a tail beam 212 and a tail beam insertion plate 213 that are connected sequentially; the guard plate 209 is opened or closed via a guard plate hydraulic cylinder 214; a height of the top beam 210 is adjusted via a top beam pillar 201; a lower end of the top beam pillar 201 is disposed on a front bottom plate 202; a front bottom plate pillar 203 is disposed at a lower side of the front bottom plate 202; the shield beam 211 is obliquely disposed and is supported by a four-bar mechanism 204; the tail beam 212 is swung and rotated via a tail beam hydraulic cylinder 215; a hollow groove is formed on the tail beam 212; the tail beam insertion plate 213 can be stretched into or out of the hollow groove via an insertion plate hydraulic cylinder 216; the tail beam 212 can be seamlessly connected to the o rear bottom plate; the rear bottom plate includes a slide plate 205 and a fixed plate 207; the slide plate 205 can be slid on the fixed plate 207; the slide plate 205 is connected to the front bottom plate 202 via a high-strength chain 206; and thus the automatic support movement is implemented. The height of the top beam 210 is adjusted via the top beam pillar 201; a rear bottom plate pillar 208 having an adjustable height is disposed at a lower side of the fixed plate 207; and according to a height of the top beam pillar 201, a height of the rear bottom plate pillar 208 and a change of a support moving position, the top beam 210 and the rear bottom plate may be adjusted in horizontal and vertical directions, and the tail beam insertion plate 213 can be seamlessly connected to the slide plate 205. The simulation hydraulic support system 2 may be operated via a button 701 on the operation console 7; and in combination o with the coal-gangue identification system 6, an indoor intelligent coal drawing experimental process is implemented, thereby being convenient and quick, and reducing the personnel operation error. The support moving device 3 includes a step motor, a traction device 301 and a slide rail 302. One end of the traction device 301 is connected to the step motor, and the other end of the traction device 301 is connected to the front bottom plate 202. The front bottom plate 202 can be slid on the slide rail 302 via the front bottom plate pillar 203 and drives the slide plate 205 to move synchronously, thereby facilitating the support movement. The traction device 301 preferably is a steel wire rope or a gear lever. When the traction device 301 is the steel wire rope, the step motor is connected to the steel wire rope via an idler wheel, thus driving the front bottom plate 202 to move. When the traction device 301 is the gear lever, the step motor drives the gear lever via engaged transmission to move, thus driving the front bottom plate 202 to move. The support moving device 3 is driven by a high-power step motor. With the step motor, different coal drawing intervals may be moved by the simulation hydraulic support system 2. Specifically, the coal drawing interval may be specifically set according to an actual requirement.

The feeding device 4 includes a triangular support 401, a circulation belt 402 and an idler wheel 403. The circulation belt 402 is disposed on an inclined surface of the triangular support 401. A plurality of baffle plates are uniformly arranged on the circulation belt 402. The idler wheel 403 is disposed on a lower portion of the triangular support 401. With the idler wheel 403, the feeding device 4 may be placed at any specified position at one side of the experimental box body 1 as required to pave the coal and the gangue. The discharging device 5 includes a support frame 501, a discharging belt 502 and a roller 503. The o discharging belt 502 is wound on the roller 503. The roller 503 is supported by the support frame 501. Specifically, a width of the discharging belt 502 is set according to a width of the coal drawing port. With the discharging device 5, a process for transporting top coal by a scraper conveyor after the top coal is drawn in a site is modeled authentically. A velocity of the discharging belt 502 may be adjusted according to a drawn amount of the coal, so that a control accuracy of the coal-gangue identification device 6 may be trained at different velocities. Both the feeding device 4 and the discharging device 5 are powered by the motor 504 preferably. The velocities of the circulation belt 402 and the discharging belt 502 are adjusted respectively by a rotary knob 505. The experimental box body 1 is made of a transparent acrylic plate. The experimental box body 1 is of a rectangular solid shape. An upper end of the feeding device 4 is flush with a top portion of the experimental box body 1. A geometric similarity ratio for a dimension of a model paved in the experimental box body 1 is not smaller than 1:3. The coal and the gangue for the experiment are taken from a site working surface to reflect a top coal drawing process more authentically and perfect a top coal drawing rule, thus helping to train the control accuracy of the coal-gangue identification system 6. A plurality of buttons 701 having corresponding functions are disposed on the operation console 7, so the operation is convenient, the workload is small, and the previous artificial operation error is reduced. The "Gi" represents a power button, and the "G2" represents an emergency stop button. For specific functions of other buttons 701, a reference is made to a test method for a large-size intelligent coal drawing experimental platform. This embodiment further provides a test method for a large-size intelligent coal drawing experimental platform, which includes the following steps: SI: adjust each part of an experimental platform before an experiment, perform a safety inspection to remove a hidden risk, and switch on a power supply. S2: start an operation console, adjust a height of a top beam pillar 201 by "Al" and "A2" buttons on the operation console 7 according to a condition of a site working surface, press a "B1" button on the operation console 7 to open a guard plate 209, adjust a position of a rear bottom plate horizontally, press "C1" and "C2" buttons on the operation console 7 to adjust a height of the rear bottom plate so that the rear bottom plate is seamlessly connected to a tail beam insertion plate 213, and adjust the experimental platform to a state required by the experiment.

S3: open a feeding device 4, and respectively pave, according to a height requirement, o coal and gangue taken from the site to complete an initial model of the experiment. S4: open a discharging device 5, press an open button "D1" of a coal drawing port on the operation console 7, control a simulation hydraulic support system to retract a tail beam insertion plate 213, press an "El" button to rotate a teal beam 212 clockwise, open the coal drawing port 9 to perform a coal drawing operation, and adjust a velocity of a discharging belt 502 according to a coal drawn amount.

S5: automatically identify, by a coal-gangue identification system 6, the drawn coal and gangue and perform signal processing, where when a proportion of the coal to the gangue reaches to a certain value, preferably when a first gangue particle is detected at the coal drawing port 9, a processing signal is fed back to the operation console, "D2" and "E2" o buttons are pressed automatically, and the control console controls the simulation hydraulic support system to rotate the tail beam 212 counterclockwise and stretch out the tail beam insertion plate 213; close the coal drawing port to stop coal drawing; and close the discharging device 5. S6: record experimental data such as coal drawing time, a top coal drawn amount, a form

of a coal and gangue separation interface, till a coal drawing process at this time is completed. S7: set an interval of a support moving device 3 in advance, press a support moving button "F1" of the simulation hydraulic support system on the operation console 7 to perform a support moving operation of the simulation hydraulic support system 2, and repeat the steps S4-S6 till a subsequent coal drawing process is completed. S8: take remained coal and gangue out of an experimental box body 1 via the discharging device 5 to separate for use in a next experiment. S9: clean the experimental box body 1, and restore to the initial state of the experimental platform via a button on the operation console 7, thus completing the whole experiment.

According to a large-size intelligent coal drawing experimental platform in this embodiment, by opening and closing a guard plate 209 via a button 701 operation on an operation console 7, rising and lowering a height of a top beam pillar 201 and a rear bottom plate pillar 208, stretching and retracting a tail beam insertion plate 213, rotating a tail beam 212, and controlling a support moving device 3 to perform support movement of a simulation hydraulic support system 2, and by identifying a coal-gangue proportion via a coal-gangue identification system 6, and automatically closing a coal drawing port, an intelligent operation of an indoor coal drawing experiment is implemented and an artificial operation error is reduced. A real coal gangue raw material in a site is selected for coal drawing. With an experiment, an existing coal-gangue movement rule can further be perfected and an existing top coal drawing rule can be perfected, thus further researching a secondary crushing characteristic in a top coal movement process. Several examples are used for illustration of the principles and implementation methods of the present invention. The description of the embodiments is used to help illustrate the method and its core principles of the present invention. In addition, those skilled in the art can make various modifications in terms of specific embodiments and scope of application in accordance with the teachings of the present invention. In conclusion, the content of this specification shall not be construed as a limitation to the invention.

Claims

1. A large-size intelligent coal drawing experimental platform, comprising: an experimental box body, a simulation hydraulic support system, a support moving device, a feeding device, a discharging device, a coal-gangue identification system, and an operation console, wherein the simulation hydraulic support system is disposed in the experimental box body; the support moving device is connected to the simulation hydraulic support system and can drive the simulation hydraulic support system to move; the feeding device is disposed at o one side of the experimental box body and can pave coal and gangue on an upper portion of the simulation hydraulic support system respectively and uniformly from the bottom up; the feeding device can be moved freely; the discharging device is disposed at a lower side of a coal drawing port of the simulation hydraulic support system; the coal-gangue identification system is disposed at one side of the simulation hydraulic support system, and is located at an upper side of the discharging device; the coal-gangue identification system can automatically identify the drawn coal and gangue, and transmits an automatic identification signal to the operation console; when a proportion of the drawn coal and gangue reaches to a certain value, the operation console automatically controls the simulation hydraulic support system to close the coal drawing port, and controls the discharging device to automatically close; and both the o simulation hydraulic support system and the support moving device are controlled by the operation console.

2. The large-size intelligent coal drawing experimental platform according to claim 1, wherein the simulation hydraulic support system comprises a guard plate, a top beam, a shield beam, a tail beam and a tail beam insertion plate that are connected sequentially; the guard plate is opened or closed via a guard plate hydraulic cylinder; a height of the top beam is adjusted via a top beam pillar; a lower end of the top beam pillar is disposed on a front bottom plate; a front bottom plate pillar is disposed at a lower side of the front bottom plate; the shield beam is obliquely disposed and is supported by a four-bar mechanism; the tail beam is swung and rotated via a tail beam hydraulic cylinder; a hollow groove is formed on the tail beam; the tail beam insertion plate can be stretched into or out of the hollow groove via an insertion plate hydraulic cylinder; the tail beam can be seamlessly connected to the rear bottom plate; the rear bottom plate comprises a slide plate and a fixed plate; the slide plate can be slid on the fixed plate; the slide plate is connected to the front bottom plate via a chain; and a rear bottom plate pillar having an adjustable height is disposed at a lower side of the fixed plate, so that the rear bottom plate can be adjusted in a vertical direction.

3. The large-size intelligent coal drawing experimental platform according to claim 2, wherein the support moving device comprises a step motor, a traction device and a slide rail; one end of the traction device is connected to the step motor, and the other end of the traction device is connected to the front bottom plate; and the front bottom plate can be slid on the slide rail via the front bottom plate pillar and drives the slide plate to move synchronously.

4. The large-size intelligent coal drawing experimental platform according to claim 1, wherein the feeding device comprises a triangular support, a circulation belt and an idler o wheel; the circulation belt is disposed on an inclined surface of the triangular support; a plurality of baffle plates are uniformly arranged on the circulation belt; and the idler wheel is disposed on a lower portion of the triangular support.

5. The large-size intelligent coal drawing experimental platform according to claim 1, wherein the discharging device comprises a support frame, a discharging belt and a roller; the discharging belt is wound on the roller; the roller is supported by the support frame; and a velocity of the discharging belt can be adjusted according to a drawn amount of the coal, so that a control accuracy of the coal-gangue identification system can be trained at different velocities.

6. The large-size intelligent coal drawing experimental platform according to claim 1, o wherein the experimental box body is made of a transparent acrylic plate; the experimental box body is of a rectangular solid shape; an upper end of the feeding device is flush with a top portion of the experimental box body; and a geometric similarity ratio for a dimension of a model paved in the experimental box body is not smaller than 1:3.

7. The large-size intelligent coal drawing experimental platform according to claim 1, wherein a plurality of buttons are arranged on the operation console.

8. A test method for the large-size intelligent coal drawing experimental platform according to any one of claims 1 to 7, comprising the following steps: SI: adjusting each part of an experimental platform before an experiment, performing a safety inspection to remove a hidden risk, and switching on a power supply; S2: starting an operation console, adjusting a height of a top beam pillar by a button on the operation console according to a condition of a site working surface, opening a guard plate, adjusting a position of a rear bottom plate horizontally, adjusting a height of the rear bottom plate so that the rear bottom plate is seamlessly connected to a tail beam insertion plate, and adjusting the experimental platform to a state required by the experiment; S3: opening a feeding device, and respectively paving, according to a height requirement, coal and gangue taken from the site to complete an initial model of the experiment; S4: opening a discharging device, pressing an open button of a coal drawing port on the operation console, controlling a simulation hydraulic support system to retract a tail beam insertion plate, rotating a teal beam clockwise, opening the coal drawing port to perform a coal drawing operation, and adjusting a velocity of a discharging belt according to a coal drawn amount; S5: automatically identifying, by a coal-gangue identification system, the drawn coal and gangue, wherein when a proportion of the coal to the gangue reaches to a certain value, a processing signal is fed back to the operation console, and the control console controls the simulation hydraulic support system to rotate the tail beam counterclockwise and stretch out the tail beam insertion plate; closing the coal drawing port to stop coal drawing; and closing the discharging device; S6: recording experimental data such as coal drawing time, a top coal drawn amount, a form of a coal and gangue separation interface, till a coal drawing process at this time is completed; S7: setting an interval of a support moving device in advance, pressing a support moving button of the simulation hydraulic support system on the operation console to perform a o support moving operation of the simulation hydraulic support system, and repeating the steps S4-S6 till a subsequent coal drawing process is completed; S8: taking remained coal and gangue out of an experimental box body via the discharging device to separate for use in a next experiment; and S9: cleaning the experimental box body, and restoring to the initial state of the experimental platform via a button on the operation console, thus completing the whole experiment.