Cross-section adjustable fully-mechanized heading roadway dust removal test system

Abstract

The present invention belongs to the technical field of dust removal testing for fully mechanized tunneling roadways, and particularly relates to a dust removal test system for fully mechanized tunneling roadways with adjustable cross-sections; it includes a simulated roadway arranged on the ground, a simulated ventilation device, a dust removal device, a wind speed distribution testing device, a dual-channel particulate matter concentration continuous online monitor, a dual-channel particulate matter sampler, and a data acquisition device in the simulated roadway. The air supply air duct of the simulated ventilation device is erected on the automatically moving devices arranged at intervals; the wind speed distribution testing device is arranged in different cross-sections in the simulated roadway; a air volume measuring device is provided at the air suction port of the air suction air duct of the dust removal device, and a dust removal fan is configured at the rear end; a data acquisition device is arranged outside the simulated roadway, and the data acquisition device displays the air volume at the air outlet and air suction port of the air duct in real time, monitors the wind speed and air volume conditions of the specified cross-section in the simulated roadway in real time, displays the dust conditions in the roadway in real time, and monitors the operating states of each device.

Description

Technical Field

[0001] The present invention belongs to the technical field of dust removal testing for fully mechanized tunneling roadways, and particularly relates to a dust removal test system for a fully mechanized tunneling roadway with adjustable cross-section. Background Art

[0002] Dust pollution in the roadway of a coal mine heading face has always been a severe problem threatening the occupational safety and health of underground workers and the safe and efficient production of the mine. The hazards of dust are mainly reflected in two aspects. One is that dust can spontaneously combust or even explode under certain conditions. The other is that workers inhale dust for a long time and deposit it in the lungs, causing diffuse fibrosis of the lung tissue and resulting in pneumoconiosis. Pneumoconiosis is the most serious occupational disease endangering the safety and health of workers, covering a wide range of groups, with great potential hazards and strong destructiveness. In recent years, the overall incidence of pneumoconiosis in mines has been continuously increasing year by year, and the onset working years have been shortened. As the main dust pollution site in a coal mine, the fully mechanized heading face has serious dust pollution at the production site due to the high-speed air flow carrying the cutting dust and migrating and diffusing to other working areas at the rear of the roadway. The air supply and dust removal devices at the heading face are effective means to improve the fully mechanized tunneling environment. In order to reveal the influence law of the air flow field migration on the dust field diffusion in the fully mechanized heading face, optimize the layout of the dust removal system, and improve the dust reduction efficiency, generally, an experimental test method with lower cost and less difficulty is adopted to construct a dust prevention test system, providing an experimental basis and a technology R & D platform for dust reduction and prevention at the working site.

[0003] At present, the laboratory-simulated roadway is one of the main research means for dust control technology. However, the fixed experimental box body cannot meet the test requirements of fully mechanized tunneling faces with different cross-sectional sizes of roadways, resulting in poor adaptability and ineffective dust reduction of the comprehensive dust prevention research results obtained.

[0004] The patent application with the application number 202010437732.2 discloses a comprehensive dust prevention test system for a fully mechanized tunneling roadway with adjustable cross-section. A plurality of adjustable roadway models are butt-jointed end to end to form a simulated fully mechanized tunneling roadway. Corresponding equipment is arranged in the simulated fully mechanized tunneling roadway according to the actual situation of the working face. The four sides of the roadway model are enclosed by means of a telescopic isolation cloth. The height of the corresponding color steel plate is adjusted by a telescopic support column, and the distance between two color steel plates is adjusted by a slider. The cutting head dust generator uses an electric motor to drive rotation to generate centrifugal force, so as to continuously and quantitatively emit dust along the outer surface of the cutting head. The diffused dust at the end of the simulated roadway is captured by a dust-catching net. In this simulated roadway, the telescopic isolation cloth serves as a flexible simulated roadway roof, and the overall simulated roadway roof has no support. When the wind acts, the telescopic isolation cloth will produce elastic fluctuations, affecting the test results. Moreover, the two sides of the simulated roadway are relatively thin. When the air volume is large, the air flow velocity inside the simulated roadway is large, and the simulated roadway is prone to collapse inward or even collapse.

[0005] Therefore, the existing technology needs to be further improved and developed. Summary of the Invention

[0006] An object of the present invention is to solve at least the above problems and provide at least the advantages described hereinafter.

[0007] To achieve the above object, the present invention provides a fully-mechanized tunneling roadway dust removal test system with adjustable cross-section, including a simulated roadway arranged on the ground. The entrance of the simulated roadway is connected to a dust reduction channel, and the end of the simulated roadway is connected to a cutting test device. The cutting test device includes a cutting medium and a cutting medium fixing device. The cutting medium closes the roadway cross-section to form a simulated working face, and the cutting medium fixing device wraps and supports the cutting medium;

[0008] An air supply air duct and an air suction air duct are arranged along the depth of the simulated roadway. The air supply air duct is mounted on an automatically moving device arranged at intervals. The air inlet end of the air supply air duct is connected to a fan outside the simulated roadway, and an outlet air volume measuring device is provided at the air outlet. The air supply air duct, the electric dust control device and the air duct storage device connected thereto form a dust control assembly with dynamically adjustable air volume. By adjusting the installation position of the electric dust control device in the air supply air duct through the air duct storage device, the use conditions of the dust control device in the underground tunneling roadway are simulated; a air volume testing device is configured at the air suction port of the air suction air duct, and a dust removal fan is arranged at the rear end. The dust removal fan uses a variable-frequency motor;

[0009] A wind speed distribution testing device is arranged in the simulated roadway. The wind speed distribution testing device includes a wind speed and wind direction sensor, a differential pressure transmitter, an atmospheric pressure transmitter, a temperature and humidity transmitter and a power meter arranged at the test point positions on a selected cross-section of the tunneling roadway;

[0010] A data acquisition device is arranged outside the simulated roadway. The data acquisition device is installed on a mobile platform. The data acquisition device collects the data measured by a wind speed transmitter, a differential pressure transmitter, an atmospheric pressure transmitter, a temperature and humidity transmitter and a power meter, and through data processing and analysis calculation, the air volume at the air outlet of the air duct is displayed in real time; inside the simulated roadway, a set of dual-channel particulate matter concentration continuous online monitor and a dual-channel particulate matter sampler are installed in the area of the tunneling operation personnel and at a distance of 15 - 20 meters from the heading face respectively. The dual-channel particulate matter concentration continuous online monitor is used for automatic online continuous testing of TSP and PM5 in the area, and the dual-channel particulate matter sampler is used for comparing and verifying the data of the dual-channel particulate matter concentration continuous online monitor.

[0011] Further, the simulated roadway is formed by butt-jointing several roadway units with adjustable cross-sections end to end. Each roadway unit includes an outer frame, within which there are a movable roof, a floor, fixed side plates, and movable side plates. The movable roof, floor, fixed side plates, and movable side plates enclose a roadway with a rectangular cross-section. The movable roof is suspended within the outer frame by a vertical lifting mechanism, and one side of the movable roof is slidably connected to the fixed side plate. The movable side plates include a horizontally movable side plate and a bidirectionally movable side plate connected by drawing. The bidirectionally movable side plate is hung under the movable roof and is slidably clamped to the movable roof. A walking wheel set is installed under the horizontally movable side plate, and the horizontally movable side plate is connected to the outer frame through a horizontal push-pull mechanism. The movable side plates horizontally move to adjust the width of the roadway, and the movable roof vertically moves and drags the bidirectionally movable side plate to slide up and down to adjust the height of the roadway. The movable roofs, floors, fixed side plates, and movable side plates on the front and rear roadway units are seamlessly butted respectively.

[0012] Further, vertical guide columns are fixed on the outer frame. There are four guide columns, which are correspondingly inserted into the guide holes at the four corners of the movable roof, and the movable roof slides up and down along the guide columns.

[0013] Further, several columns of vertical rail tracks are arranged on the outer side surface of the bidirectionally movable side plate, and vertical card slots that fit the vertical rail tracks are provided on the horizontally movable side plate. The bidirectionally movable side plate and the horizontally movable side plate are connected by the cooperation of the vertical rail tracks and the vertical card slots. Several columns of horizontal rail tracks are arranged on the movable roof, and horizontal card slots are opened at the top end of the bidirectionally movable side plate. The bidirectionally movable side plate is slidably connected to the movable roof by engaging the horizontal card slots with the horizontal rail tracks.

[0014] Further, the vertical rail tracks and the horizontal rail tracks are angle steel bars, and the vertical card slots and the horizontal card slots are angle steel guide slots with a cross-section of 〦 shape.

[0015] Further, the vertical lifting mechanism includes several scissor lift tables; the horizontal push-pull mechanism includes several fork and scissors mechanisms. A set of channel steels is arranged in front of and behind each fork and scissors mechanism. The front and rear channel steels are respectively installed on the horizontally movable side plate and the outer frame. The front and rear guide wheel sets of the fork and scissors mechanism are slidably clamped to the channel steels. The front and rear fixed hinge seats of the fork and scissors mechanism are respectively installed on the horizontally movable side plate and the outer frame.

[0016] Further, the outer frame is a gantry bracket formed by welding longitudinal and transverse square steels, and the outer frame is integrally fixed on the floor.

[0017] Further, sealing strips are provided at the joints between the plates in the roadway unit, and sealing strips are provided at the joints between the roadway units.

[0018] Furthermore, the dust-removing channel includes a channel body, and atomizing nozzles are arranged on the top plate and both side plates of the channel body. The atomizing nozzles are connected to a water tank and a spray pump station arranged outside the simulated roadway through a water supply network.

[0019] Compared with the prior art, the advantages of the present invention are as follows:

[0020] A fully adjustable cross-section roadway dust removal test system provided by the present invention is formed into a complete roadway dust removal test system on the basis of an adjustable cross-section simulated roadway. The adjustable cross-section simulated roadway is formed by end-to-end docking of several roadway units with adjustable cross-sections. The roadway unit adopts a structure form of a fork and scissors mechanism to drive a movable top plate, a horizontally movable side plate, and a bidirectionally movable side plate, which can realize stepless regulation of the size of the rectangular simulated roadway, and can increase the bidirectionally movable side plate according to the required roadway cross-section size to realize multi-stage telescoping of the bidirectionally movable side plate; the variable simulated roadway plate is made of a sandwich cotton board, which can resist the negative pressure generated at the front end of the roadway due to the suction air duct, so that the roadway will not be damaged by the negative pressure.

[0021] By adjusting the air volume of the air door of the electric dust control device and adjusting the installation position of the electric dust control device through the air duct storage device to simulate the use condition of the dust control device in the underground driving roadway, thereby simulating the actual working condition of the ventilation system in the underground driving roadway and analyzing the influence of the matching relationship between the air supply volume of the roadway and the air volume of the dust control device on the comprehensive dust removal efficiency of the roadway.

[0022] A air volume testing device is provided in front of the air outlet of the air supply air duct. By collecting the data measured by a wind speed transmitter, a differential pressure transmitter, an atmospheric pressure transmitter, a temperature and humidity transmitter, and a power meter, the air volume at the air outlet of the air duct is displayed in real time, and the actual air supply volume of the roadway is accurately measured. A air volume testing device is provided in front of the air suction port of the air suction air duct. By collecting the data measured by a wind speed transmitter, a differential pressure transmitter, an atmospheric pressure transmitter, a temperature and humidity transmitter, and a power meter, the air volume at the air suction port is displayed in real time, and the processing air volume of the dust removal fan is accurately measured. The wind speed distribution testing device includes wind speed and direction sensors, a differential pressure transmitter, an atmospheric pressure transmitter, a temperature and humidity transmitter, and a power meter arranged at the test point positions on the selected cross-section of the driving roadway; a data acquisition device is arranged outside the simulated roadway. The data acquisition device collects the data measured by the wind speed and direction sensors, a wind speed transmitter, a differential pressure transmitter, an atmospheric pressure transmitter, a temperature and humidity transmitter, and a power meter, and through data processing and analysis and calculation, displays the air volume at the air outlet and air suction port of the air duct and the wind speed distribution condition of the roadway cross-section in real time. Description of the Drawings

[0023] Figure 1 It is a three-dimensional structure diagram of the fully adjustable cross-section roadway dust removal test system.

[0024] Figure 2 It is a plan structure diagram of the fully adjustable cross-section roadway dust removal test system.

[0025] Figure 3 It is a schematic structural diagram of the air supply device.

[0026] Figure 4 It is a schematic structural diagram of the wind speed distribution test device.

[0027] Figure 5 It is a schematic structural diagram of the cutting test device.

[0028] Figure 6 It is a schematic structural diagram of the simulated roadway unit.

[0029] Figure 7 It is a schematic structural diagram of the movable roof.

[0030] Figure 8 It is a schematic structural diagram of the bidirectional moving side plate.

[0031] Figure 9 It is a schematic structural diagram of the horizontally moving side plate.

[0032] Figure 10 It is a schematic diagram of the cooperation between the guide wheel set and the channel steel.

[0033] In the figure: 1 - cutting test device; 101 - cutting medium; 102 - cutting medium fixing device; 103 - reinforcement device; 2 - simulated roadway; 21 - roadway unit; 201 - outer frame; 202 - fixed side plate; 203 - scissor mechanism; 2031 - fixed hinge seat; 2032 - guide wheel set; 204 - scissor lift table; 205 - movable roof; 206 - horizontally moving side plate; 2061 - traveling wheel set; 207 - bidirectional moving side plate; 208 - angle steel strip; 209 - channel steel; 210 - angle steel guide groove; 2011 - square steel; 2012 - guide post; 211 - sealing strip; 3 - air supply device; 301 - outlet air volume measuring device; 302 - electric dust control device; 303 - air duct storage device; 304 - automatic moving device; 305 - air supply air duct; 306 - fan; 4 - suction air duct; 5 - dust removal fan; 6 - dust reduction channel; 601 - atomizing nozzle; 7 - air compressor; 8 - centralized control platform; 9 - data acquisition device; 10 - mobile trolley; 11 - oil pump station; 12 - electric control cabinet; 13 - air supply fan; 14 - spray pump station; 15 - water tank; 16 - roadheader; 17 - dual-channel particulate matter concentration continuous online monitor; 18 - dual-channel particulate matter sampler; 19 - traveling trolley; 20 - test point; 21 - air volume test device. Specific implementation manners

[0034] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings. The content shown in each figure is only for understanding the technical content of the invention and does not represent the actual proportion and true shape of the product. Among them, the same reference numerals represent parts with the same structure or the same function but similar structures.

[0035] In this article, "parallel", "perpendicular", etc. are not strict mathematical and / or geometric restrictions. It can also include errors that can be understood by those skilled in the art and are allowed during the manufacture or use of the product. In addition, "perpendicular" not only includes the mutual perpendicularity of two objects directly in contact in space, but also includes the mutual perpendicularity of two objects not in contact in space.

[0036] As Figure 1 、 Figure 2 shown; a cross-section adjustable comprehensive tunneling roadway dust removal test system includes a simulated roadway 2 arranged on the ground. The entrance of the simulated roadway 2 is connected to a dust reduction channel 6, and the end of the simulated roadway 2 is connected to a cutting test device 1. The cutting test device 1 includes a cutting medium 101 and a cutting medium fixing device 102. The cutting medium 101 closes the roadway cross-section to form a simulated working face. The roadheader 16 completes the cutting operation in the simulated roadway 2, and the cutting medium fixing device 102 wraps and supports the cutting medium 101.

[0037] As Figure 3 shown; an air supply air duct 305 and an air suction air duct 4 are arranged along the depth of the simulated roadway 2. The air supply air duct 305 is erected on an automatically moving device 304 arranged at intervals. The air inlet end of the air supply air duct 305 is connected to a fan 306 outside the simulated roadway 2, and an outlet air volume measuring device 301 is provided at the air outlet. The air supply air duct 305 and the electric dust control device 302 and the air duct storage device 303 connected thereto form a dust control component with dynamically adjustable air volume. The air suction port of the air suction air duct 4 is configured with an air volume test device 21, and a dust removal fan 5 is configured at the rear end.

[0038] The fan 306 adopts a low-noise fan. The air supply device 3 composed of the fan 306, the air supply duct 305, the automatic moving device 304, the duct storage device 303, the electric dust control device 302, and the outlet air volume measuring device can provide a fresh air flow of 300 - 1500 m³ / min to the test roadway. The air door opening angle of the electric dust control device 302 is 0 - 90°, and it is electrically opened. It includes an attached-wall air duct. The air volume is adjusted by adjusting the air door of the electric dust control device 302. The air duct storage capacity of the duct storage device 303 is 30 m. The installation position of the electric dust control device 302 in the air supply duct 305 is adjusted through the duct storage device 303 to simulate the usage conditions of the dust control device in the underground driving roadway; the dust removal fan 5 is controlled by a variable-frequency motor, and the treated air volume is adjustable. A air volume testing device 21 is provided at the suction opening of the suction air duct to detect the actual treated air volume of the dust removal fan, thereby simulating the actual working conditions of the ventilation system in the underground driving roadway, analyzing the matching relationship between the roadway air supply and the dust removal fan, and the influence on the comprehensive dust removal efficiency of the roadway.

[0039] According to the GB / T10178 and MT421 standards, by collecting the data measured by the wind speed transmitter, differential pressure transmitter, atmospheric pressure transmitter, temperature and humidity transmitter, and power meter, through data processing, analysis and calculation, the air volume at the air outlet and suction opening of the real-time air duct is displayed in real time.

[0040] As Figure 4 shown; a wind speed distribution testing device is arranged in the simulated roadway. The air volume testing device is directly hung on the simulated roadway frame. There is also a walking trolley 19 at the top, which is convenient to move along the roadway. The hanging point 20 is the hanging point of the wind speed and direction sensor, which can move left, right, up and down. The arrangement of the test points of the wind speed distribution testing device is based on GB / T10178-2006. The number of horizontal lines (parallel to the short side) of the rectangular cross-section and the number of measuring points on each horizontal line are both not less than 5. If the aspect ratio (height-width ratio) of the rectangular cross-section is far from 1, the number of horizontal lines should be increased to more than 5. Considering that the maximum size of the variable simulated roadway is 8 m × 6 m, the design scheme adopts 10 horizontal lines, with 6 measuring points arranged on each horizontal line, totaling 60 measuring points, which are mainly used to measure the wind speed and air volume at different cross-sections in the simulated roadway, and analyze the wind speed distribution at different cross-sections.

[0041] A data acquisition device 9 is arranged outside the simulated roadway 2. The data acquisition device 9 is installed on a moving platform. The data acquisition device 9 collects the data measured by the wind speed and direction sensor, wind speed transmitter, differential pressure transmitter, atmospheric pressure transmitter, temperature and humidity transmitter, and power meter, through data processing, analysis and calculation, and displays the air volume at the air outlet and suction opening of the air duct and the air volume and wind speed of the roadway cross-section in real time. Analyze and measure the actual air supply volume at the driving face, the wind speed distribution at the driving heading face, and the overlapping section wind speed (the lowest wind speed in the roadway) under different ventilation conditions of the simulated roadway, and evaluate whether the actual air supply volume and overlapping section wind speed at the driving face meet the requirements of the Coal Mine Safety Regulations.

[0042] The mobile platform is a hand-pushed mobile cart 10. The data acquisition device 9 includes a data acquisition module, a data front-end sensor module and a software processing module. The data acquisition device 9 includes a data transmission line pipeline pre-buried underground, and a corresponding sensor is externally connected to the front end of the data transmission line and connected to the test tunnel boring machine to realize data collection and data analysis. The data acquisition device 9 is also used to collect data on the vibration, temperature, cutting head speed, traction, hydraulic system pressure and flow parameters of the tunnel boring machine during cutting, and process and analyze the data.

[0043] In the simulated tunnel 2, a set of dual-channel continuous online particle concentration monitor 17 and dual-channel particle sampler 18 are installed in the excavation operator area and 15 to 20 meters away from the front. The dual-channel continuous online particle concentration monitor 17 is used to automatically and continuously test TSP (total suspended particulate matter) and PM5 (respirable dust) in the area, and can transmit data to the industrial computer display for real-time display. The dual-channel particle sampler 18 is used to detect the dust concentration in the area. The filter membrane weighing method is used to sample the dust particles in the excavator equipment area and the operator area through the built-in filter membrane, and weigh them through the dust weighing and analysis device. The data of the automatic online continuous test of the dual-channel continuous online particle concentration monitor is verified to realize the detection of dust concentration.

[0044] The dual-channel continuous online monitor of particulate matter concentration and the dual-channel particulate matter sampler are both dual-channel structures, so the chassis dimensions are designed to be unified. In order to facilitate data observation, the operation display is designed on the chassis door to prevent dust from polluting the inside of the chassis during operation. The chassis is waterproof and dustproof structure IP43. A set of continuous measurement and samplers are installed near the operator, and the split design is adopted, which is convenient and flexible to fix on the machine. Another set of host and sampling pump box combination is fixed on a rack with rollers, which is convenient for adjusting the test point position on site.

[0045] like Figure 5As shown in the figure; the cutting medium 101 is formed by stacking artificial rock walls with unidirectional compressive strengths of 60 MPa, 80 MPa, 100 MPa, and 120 MPa respectively by concrete, and the unidirectional compressive strength increases sequentially from bottom to top. There is a grouting port in the cutting medium 101. The cross-sectional size of the cutting medium 101 is 8 m × 6 m, and the depth is 6 m, meeting the test requirements of the largest roadheader in China at present. The cutting test device 1 is fixed on the ground through pile foundations, etc. Three sides (left, right, and back) of the cutting medium 101 are surrounded by the cutting medium fixing device 102 to achieve stable fixation of the cutting medium, which can withstand a maximum axial force ≥ 100 t; a maximum radial force ≥ 50 t, and there is a grouting port, which can realize re-stacking and pouring after the artificial rock wall is cut. A reinforcement device 103 is arranged at the rear end of the cutting medium fixing device 102 to resist the feeding force during the cutting of the roadheader.

[0046] As Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 shown; the simulated roadway 2 is formed by butt-jointing several roadway units with adjustable cross-sections. According to the roadway configuration, the roadway units can be increased. The roadway unit includes an outer frame 201, and an active roof 205, a floor, a fixed side plate 202, and a movable side plate are arranged inside the outer frame 201. The outer frame 201 is a support device for the roadway unit, and the outer frame 201 is a gantry support formed by welding longitudinal and transverse square steels 2011. The whole outer frame 201 is fixed on the floor. The active roof 205, the floor, the fixed side plate 202, and the movable side plate enclose a roadway with a rectangular cross-section, and the active roof 205, the floor, the fixed side plate 202, and the movable side plate adopt sandwich panels. The active roof 205 is suspended inside the outer frame 201 through a vertical lifting mechanism, and one side of the active roof 205 is slidably connected to the fixed side plate 202; the movable side plate includes a horizontally movable side plate 206 and a bidirectionally movable side plate 207 connected by drawing. The bidirectionally movable side plate 207 is hung under the active roof 205 and is slidably clamped with the active roof 205. A walking wheel set 2061 is installed under the horizontally movable side plate 206, and the horizontally movable side plate 206 is connected to the outer frame 201 through a horizontal push-pull mechanism; the movable side plate horizontally moves to adjust the width of the roadway, and the active roof 205 vertically moves and drags the bidirectionally movable side plate 207 to slide up and down to adjust the height of the roadway; the active roof 205, the floor, the fixed side plate 202, and the movable side plate on the front and rear roadway units are seamlessly butted respectively.

[0047] The vertical guide posts 2012 are fixed on the outer frame 201. There are four guide posts 2012, which are correspondingly inserted into the guide holes at the four corners of the movable top plate 205, and the movable top plate 205 slides up and down along the guide posts 2012. The vertical lifting mechanism includes several scissor lift tables 204; the horizontal pushing and pulling mechanism includes several fork and scissors mechanisms 203. A set of channel steels 209 are arranged in front of and behind the fork and scissors mechanism 203. The front and rear channel steels 209 are respectively installed on the horizontally moving side plate 206 and the outer frame 201. The front and rear guide wheel sets 2032 of the fork and scissors mechanism 203 are slidably clamped with the channel steels 209. The front and rear fixed hinge seats 2031 of the fork and scissors mechanism 203 are respectively installed on the horizontally moving side plate 206 and the outer frame 201.

[0048] A number of vertical clamping rails are arranged on the outer side plate surface of the bidirectional moving side plate 207. The horizontally moving side plate 206 has vertical clamping grooves that fit with the vertical clamping rails. The bidirectional moving side plate 207 and the horizontally moving side plate 206 are connected by the cooperation of the vertical clamping rails and the vertical clamping grooves; a number of horizontal clamping rails are arranged on the movable top plate 205. The top end of the bidirectional moving side plate 207 is provided with a horizontal clamping groove. The bidirectional moving side plate 207 is slidably connected to the movable top plate 205 by engaging the horizontal clamping groove with the horizontal clamping rail. The vertical clamping rails and the horizontal clamping rails are angle steel bars 208, and the vertical clamping grooves and the horizontal clamping grooves are angle steel guide grooves 210 with a cross-section of 〦 shape.

[0049] The minimum cross-sectional size of the simulated roadway 2 is (width × height) 5×3 m, and the maximum cross-sectional size is (width × height) 8×6 m. The cross-sectional size within the upper and lower limit intervals can be steplessly adjusted, and the cross-section is rectangular. The scissor lift table 204 drives the movable top plate 205 to move up and down under the guiding action of the guide posts 2012 of the outer frame 201 to realize the adjustment of the longitudinal height of the simulated roadway. The horizontal fork and scissors mechanism 203 drives the horizontally moving side plate 206 to move horizontally. The guide wheel set 2032 on the horizontal fork and scissors mechanism 203 can move on the channel steel 209. A walking wheel set 2061 is arranged at the lower end of the horizontally moving side plate 206, which can reduce the friction when the horizontally moving side plate 206 moves. The movable top plate 205 and the horizontally moving side plate 206 are connected by the bidirectional moving side plate 207. The bidirectional moving side plate 207 cooperates with the angle steel bar 208 arranged on its plate surface and the angle steel guide groove 210 on the horizontally moving side plate 206, and cooperates with the angle steel guide groove 210 on its top surface and the angle steel bar 208 arranged on the movable top plate 205. The bidirectional moving side plate 207 can realize the following movement with the movable top plate 205 and the horizontally moving side plate 206, so as to realize the adjustment of the horizontal width of the simulated roadway.

[0050] The air suction duct 4 and the air supply duct 3 built into the simulated roadway 2 are suspended on both sides of the roadway by hooks. The air suction duct 4 and the air supply duct 3 are respectively suspended on the bidirectional moving side plate 207 and the fixed side plate 202. During the process of the variable cross-section of the simulated roadway 2, the air suction duct 4 and the air supply duct 3 are removed and then reinstalled after the cross-section adjustment is completed.

[0051] Sealing strips 211 are provided at the joints between the plates of the roadway unit, and sealing strips 211 are also provided at the joints between the roadway units. Multiple sealing strips 211 are arranged around and inside the roadway unit, which can achieve the internal sealing of the roadway unit 21 and the sealing between the roadway units.

[0052] The dust reduction channel 6 includes a channel main body. Atomizing nozzles 601 are arranged on the top plate and both side plates of the channel main body. The water mist sprayed by the atomizing nozzles 601 plays a role in dust reduction. The atomizing nozzles 601 are connected to a water tank 15 and a spray pump station 14 arranged outside the simulated roadway through a water supply pipe network. The water tank 15 supplies water to the roadheader 16 through a rubber hose, providing sufficient cutting water for the nozzles of the roadheader. The water tank 15 and the spray pump station 14 are located outside the open side of the simulated roadway 2.

[0053] It should be understood that although this specification is described according to each embodiment, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0054] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent embodiments or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A fully mechanized heading roadway dust removal test system with adjustable cross-section, characterized in that: It includes a simulated roadway (2) set on the ground. The entrance of the simulated roadway (2) is connected to a dust-removing channel (6), and the end of the simulated roadway (2) is connected to a cutting test device (1). The cutting test device (1) includes a cutting medium (101) and a cutting medium fixing device (102). The cutting medium (101) closes the roadway section to form a simulated working face, and the cutting medium fixing device (102) wraps and supports the cutting medium (101). An air supply duct (305) and an air suction duct (4) are arranged longitudinally in the simulated roadway (2). The air supply duct (305) is mounted on automatically moving devices (304) arranged at intervals. The inlet end of the air supply duct (305) is connected to a fan (306) outside the simulated roadway (2), and an outlet air volume measuring device (301) is provided at the air outlet. The air supply duct (305), the electric dust control device (302) and the duct storage device (303) connected thereto form a dust control assembly with dynamically adjustable air volume. The installation position of the electric dust control device (302) in the air supply duct (305) is adjusted through the duct storage device (303) to simulate the use conditions of the dust control device in the underground driving roadway. The air suction port of the air suction duct (4) is equipped with an air volume testing device (21), and a dust removal fan (5) is configured at the rear end. The dust removal fan (5) uses a variable frequency motor. A wind speed distribution testing device is provided in the simulated roadway (2). The wind speed distribution testing device includes wind speed and direction sensors, differential pressure transmitters, atmospheric pressure transmitters, temperature and humidity transmitters, and power meters arranged at the test point positions on the selected cross section of the driving roadway. A data acquisition device (9) is arranged outside the simulated roadway (2). The data acquisition device (9) is installed on a mobile platform. The data acquisition device (9) acquires the data measured by the wind speed transmitter, differential pressure transmitter, atmospheric pressure transmitter, temperature and humidity transmitter, and power meter, and through data processing, analysis and calculation, the air volume at the air outlet of the duct is displayed in real time. Inside the simulated roadway (2), a set of dual-channel particulate matter concentration continuous online monitor (17) and a dual-channel particulate matter sampler (18) are installed in the area of the driving operation personnel and at a distance of 15 - 20 meters from the heading face respectively. The dual-channel particulate matter concentration continuous online monitor (17) is used for automatic online continuous testing of TSP and PM5 in the area, and the dual-channel particulate matter sampler (18) is used to compare and verify the data of the dual-channel particulate matter concentration continuous online monitor (17).

2. The sectional adjustable fully-mechanized heading roadway dust removal test system according to claim 1, characterized in that: The simulated roadway (2) is formed by butt - jointing a number of roadway units with adjustable cross - sections end to end. The roadway unit includes an outer frame (201). Inside the outer frame (201), there are a movable roof (205), a floor, fixed side plates (202), and movable side plates. The movable roof (205), the floor, the fixed side plates (202), and the movable side plates enclose a roadway with a rectangular cross - section. The movable roof (205) is suspended inside the outer frame (201) through a vertical lifting mechanism, and one side of the movable roof (205) is slidably connected to the fixed side plate (202). The movable side plates include a horizontally movable side plate (206) and a bidirectionally movable side plate (207) connected by drawing. The bidirectionally movable side plate (207) is hung under the movable roof (205) and is slidably clamped to the movable roof (205). A walking wheel set (2061) is installed under the horizontally movable side plate (206), and the horizontally movable side plate (206) is connected to the outer frame (201) through a horizontal push - pull mechanism. The movable side plates horizontally move to adjust the width of the roadway, and the movable roof (205) vertically moves and drags the bidirectionally movable side plate (207) to slide up and down to adjust the height of the roadway. The movable roof (205), the floor, the fixed side plates (202), and the movable side plates on the front and rear roadway units are seamlessly butted respectively.

3. The sectional adjustable fully mechanized tunneling roadway dust removal test system according to claim 2, characterized in that: Vertical guide columns (2012) are fixed on the outer frame (201). There are four guide columns (2012), which are correspondingly inserted into the guide holes at the four corners of the movable roof (205), and the movable roof (205) slides up and down along the guide columns (2012).

4. The sectional adjustable comprehensive tunneling roadway dust removal test system according to claim 2, characterized in that: A number of vertical rail rows are arranged on the outer side surface of the bidirectionally movable side plate (207), and vertical card slots that fit the vertical rail rows are provided on the horizontally movable side plate (206). The bidirectionally movable side plate (207) and the horizontally movable side plate (206) are connected by the cooperation of the vertical rail rows and the vertical card slots. A number of horizontal rail rows are arranged on the movable roof (205), and horizontal card slots are opened at the top of the bidirectionally movable side plate (207). The bidirectionally movable side plate (207) is slidably connected to the movable roof (205) by engaging the horizontal card slots with the horizontal rail rows.

5. The sectional adjustable fully mechanized heading roadway dust removal test system according to claim 4, wherein: The vertical rail rows and the horizontal rail rows are angle steel bars (208), and the vertical card slots and the horizontal card slots are angle steel guide slots (210) with a cross - section of 〦 shape.

6. The cross-section adjustable fully-mechanized heading roadway dust removal test system according to claim 3, wherein: The vertical lifting mechanism includes several scissor - type lifting platforms (204); the horizontal push - pull mechanism includes several scissor - type mechanisms (203). A set of channel steels (209) is arranged in front of and behind each scissor - type mechanism (203). The front and rear channel steels (209) are respectively installed on the horizontally movable side plate (206) and the outer frame (201). The front and rear guide wheel sets (2032) of the scissor - type mechanism (203) are slidably clamped to the channel steels (209). The front and rear fixed hinge seats (2031) of the scissor - type mechanism (203) are respectively installed on the horizontally movable side plate (206) and the outer frame (201).

7. The sectional adjustable comprehensive tunneling roadway dust removal test system according to claim 6, characterized in that: The outer frame (201) is a gantry bracket formed by welding longitudinal and transverse square steels (2011), and the whole outer frame (201) is fixed on the floor.

8. The sectional adjustable comprehensive tunneling roadway dust removal test system according to claim 2, characterized in that: A sealing strip (211) is provided at the joint between the plates in the roadway unit, and a sealing strip (211) is provided at the joint between the roadway units.

9. The cross-section adjustable comprehensive tunneling roadway dust removal test system according to claim 1, characterized in that: The dust reduction channel (6) includes a channel main body, atomizing nozzles (601) are arranged on the top plate and the two side plates of the channel main body, and the atomizing nozzles (601) are connected to a water tank (15) and a spray pump station (14) arranged outside the simulated roadway through a water supply network.

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