Bauxite mining roadheader with monitoring function and method

Abstract

The present invention discloses a bauxite mining tunneling machine with a monitoring function, comprising a cantilevered tunneling machine body, a wireless torsional stress strain gauge test module, an infrared camera, and a high-definition camera. The tunneling machine body's cutting head connecting shaft is rotatably connected to a telescopic portion, which is connected to a gearbox. The connecting shaft is equipped with a wireless torsional stress strain gauge test module. The infrared camera and the high-definition camera are mounted on the telescopic portion via a hidden camera bracket. The machine also comprises a rotating annular spray pipe, which is fixedly connected to the rotating bracket and arranged in a trumpet-shaped position outside the telescopic portion. The annular spray pipe has multiple spray heads arranged in an annular staggered pattern, with the multiple spray heads facing the cutting teeth of the cutting head. The present invention effectively reduces dust and water consumption and avoids reliance on water pressure to achieve large-area spraying, thereby achieving better energy conservation and environmental protection. It also improves tunneling safety and avoids the problem of increased tunneling energy consumption caused by tunneling under long-term high friction, thereby achieving energy conservation.

Description

Technical Field

[0001] The present invention relates to a bauxite mining tunneling machine and method with a monitoring function, in particular to an energy-saving and environmentally friendly tunneling machine, belonging to the technical field of tunneling machines. Background Art

[0002] In the existing underground bauxite mining process, metal mine cantilevered tunnel boring machines are used for mining. During the mining process, the cutting head is controlled to move forward, and then move up and down and back and forth to one side for excavation. However, the geological structure of bauxite is complex. When encountering a bauxite layer with a higher hardness during the tunneling process, the cutting teeth of the cutting head collide with the bauxite layer at high speed. Due to the sudden change in the hardness of the bauxite layer, the cutting teeth will be damaged by high temperature in the event of a sudden change, and may even fall off and cause the machine to shut down.

[0003] Moreover, during the excavation process of a metal mine tunneling machine, the hardness of the ore will change, which will cause damage to the cutting teeth. A Chinese patent application (application number 2024104634813) discloses an underground bauxite mining device and its operation method. The patent discloses the use of a plurality of strip-shaped spray pipes arranged in a ring to achieve cooling and dust reduction, but this method also has the problem of inadequate spraying, which leads to poor cooling and dust reduction effects. It also discloses a method of using current mutation to monitor the torque change problem and cutting tooth damage problem of the tunneling machine cutting head of the tunneling machine. Since the change in current may also be caused by other reasons, it is easy to cause misjudgment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to provide a bauxite mining tunneling machine and method with a monitoring function, which can achieve better dust reduction and temperature reduction of the tunneling machine, making the tunneling machine more energy-saving and environmentally friendly, and can accurately realize the torque change of the tunneling machine cutting head and the damage of the cutting teeth, which is conducive to controlling the cutting head to perform safe cutting operations.

[0005] The technical solution adopted by the present invention is: a bauxite mining roadheader with a monitoring function, including a cantilever roadheader body, a wireless torsional stress strain gauge test module, an infrared camera and a high-definition camera. The cantilever roadheader body is provided with a cutting head, the connecting shaft of the cutting head is rotatably connected to the telescopic part and the end thereof away from the cutting head is connected to the output shaft of the gearbox, the telescopic part is connected to the end away from the cutting head and is connected to the gearbox, the connecting shaft of the cutting head is installed with a wireless torsional stress strain gauge test module for detecting its torsional stress, the infrared camera and the high-definition camera are installed on the telescopic part through a hidden camera bracket, the infrared camera and the high-definition camera are respectively used to detect the temperature and broken teeth of the cutting head, and also includes an annular spray pipe, two annular spray pipes of different sizes are provided, fixedly connected to the rotating bracket and arranged in a trumpet shape outside the telescopic part, the rotating bracket is rotatably connected to the outer surface of the telescopic part and is driven to rotate back and forth within 180 degrees by a driving mechanism, and multiple spray heads are arranged in an annular staggered manner on the annular spray pipe, and the multiple spray heads are directed towards the cutting teeth of the cutting head.

[0006] Furthermore, the above-mentioned bauxite mining roadheader with monitoring function also includes a current sensor of the drive motor driving the gearbox, and the current sensor is used to monitor the change of the torsional torque of the cutting head.

[0007] Furthermore, the above-mentioned bauxite mining tunneling machine with monitoring function also includes a monitoring and analysis module, which obtains an operating status judgment of the cutting head based on the detection conditions of the current detection module, the wireless torsional stress strain gauge test module, the infrared camera and the high-definition camera.

[0008] Furthermore, the wireless torsional stress strain gauge test module is connected to a temperature difference power generation module, which is connected inside the cutting head. The wireless torsional stress strain test gauge module is installed on the connecting shaft located inside the cutting head.

[0009] Furthermore, the above-mentioned wireless torsional stress strain tester module includes a stress strain gauge and a control circuit board. The stress strain gauge uses two pieces, which are cross-attached to the groove set on the connecting shaft and arranged at a 45° angle to the axis of the connecting shaft. The two pieces are connected to the control circuit board, and the control circuit board is fixedly connected in the groove. The groove is sealed with a sealing cover. The control circuit board is connected to the thermoelectric power generation module through a cable, and a sealing sleeve is provided at the sealing cover where the cable passes.

[0010] Furthermore, the above-mentioned camera bracket includes a camera mounting plate, a double-rod cylinder and a second sealing cover. The camera mounting plate is fixedly connected to the infrared camera and the high-definition camera side by side. The camera mounting plate is fixedly connected to the mounting plate to which the ends of the two cylinder rods of the double-rod cylinder are fixedly connected through an L-shaped plate. The tail end of the cylinder seat of the double-rod cylinder is rotatably connected to the concave cavity set on the top surface of the telescopic part through the pitch axis. The pitch axis is connected to a pitch motor that drives its rotation. The pitch motor is installed in a motor slot on one side of the concave cavity, and the second sealing cover covers the concave cavity.

[0011] Furthermore, the above-mentioned sealing cover 2 is connected to four connecting columns through four tension springs, and the four connecting columns are symmetrically fixedly connected to the cylinder base of the double-rod cylinder. The sealing cover 2 includes a first-section sealing cover and a second-section sealing cover. The length of the first-section sealing cover is greater than that of the second-section sealing cover. The first-section sealing cover is hinged to the second-section sealing cover, and the second-section sealing cover is hinged to the concave cavity away from one end of the cutting head. After the double-rod cylinder rotates and is located in the concave cavity, the first-section sealing cover can be elastically tightened to the sealing step set at the cavity mouth of the concave cavity, and the second-section sealing cover is sealed on the cavity mouth.

[0012] An operating method for a bauxite mining roadheader with a monitoring function is as follows: during the horizontal cutting process of the cutting head controlled by the roadheader, if the current sensor of the motor driving the cutting head to rotate and the wireless torsional stress strain gauge test module arranged on the connecting shaft respectively detect that a sudden inflection point occurs in the current curve and the torque, the feed rate of the cutting head is controlled to be halved and the rotation speed is increased by 20%, the annular spray pipe is controlled to rotate back and forth to spray and spray water to cool the cutting teeth, and if the current value and the torque of the cutting head are still twice that of normal cutting and are maintained for the set time, the feed rate of the cutting head is continued to be controlled to be reduced by one third and the rotation speed is increased by 10%, and the current sensor and the wireless torsional stress strain gauge test module continue to detect the current size and Torque size, annular spray pipe spray conditions and back-and-forth rotation, when the current and torque meet the set range, the speed and feed rate are controlled for cutting. If the current and torque still do not meet the set range, then exit one-third of the cutting amount, annular spray pipe spray conditions and back-and-forth rotation, if the current and torque meet the corresponding set ranges respectively, maintain this state for cutting, if not, exit, slowly rotate the cutting head, use an infrared camera to detect the temperature of the cutting head and cutting teeth, and use a high-definition camera to collect pictures of the cutting head. If the collected temperature is higher than the set value and the pictures taken by the high-definition camera are compared to confirm whether there are broken teeth, if so, stop the operation of the tunneling machine, repair the cutting teeth or replace the cutting head.

[0013] Beneficial effects of the present invention: The effects of the present invention are as follows:

[0014] (1) The present invention sets two annular spray pipes and staggered spray heads, which coordinate the back-and-forth rotation of the rotating bracket to spray, which can effectively achieve dust reduction and reduce water consumption and avoid relying on water pressure to achieve large-area spraying, thereby achieving better energy saving and environmental protection; real-time torque measurement and temperature monitoring can accurately realize the change of resistance to the cutting head, and then control the change of corresponding cutting control parameters to improve the mining safety of the tunnel boring machine, and through the secondary calibration of the camera to detect broken teeth, improve the detection accuracy, improve tunneling safety and avoid the problem of increased tunneling energy consumption due to long-term tunneling under high friction, thereby achieving energy saving;

[0015] (2) Torque, temperature and camera correction fusion temperature monitoring can further improve detection accuracy;

[0016] (3) The monitoring and analysis module automatically makes a fusion judgment based on current, torque temperature and camera conditions to improve the accuracy and reliability of judgment and improve the efficiency of judgment and evaluation;

[0017] (4) By setting up a temperature difference power generation module to power the infinite torsion stress strain test piece module, the temperature generated by the cutting head is used to generate electricity to power the test piece module, thereby avoiding the interference caused by the power supply to the rotating cutting head, saving energy, and the temperature difference power generation can also meet the power supply demand;

[0018] (5) Using two stress strain gauges to test torque can improve the test accuracy. In addition, by setting grooves, it avoids occupying the surface and affecting the use of the connecting shaft. Using a sealing cover to cover it can avoid external influences and improve the test stability and reliability.

[0019] (6) The camera is hidden in the cavity, which can effectively protect the camera and prevent the camera from being damaged by stones flying during the use of the cutting head, thereby improving the safety of use. The cylinder telescopic drive is used to facilitate the control of the height, thereby covering different ranges of shooting. The pitch angle is controlled by the pitch motor, thereby achieving the optimal pitch angle control;

[0020] (7) The two-stage sealing cover is matched with four tension springs and connecting columns, which can realize the rapid and reliable sealing of the cavity, avoid interference, and realize automatic opening and closing during the rotation of the hydraulic cylinder, thereby reducing power equipment, reducing costs and saving energy;

[0021] (8) The real-time coordinated monitoring of current and torque is adopted to accurately monitor the force changes of the cutting head, and then the corresponding control of the feed rate of the cutting head is proposed to effectively avoid damage caused by excessive force due to the increase in the hardness of bauxite, etc., and improve the safety of the cutting head. After repeatedly changing the feed rate and feed depth, the artificial improvement is made. After reducing the speed, an infrared temperature camera is used for effective monitoring to detect the cutting teeth with too high temperatures, and the camera is used for secondary calibration to check whether there is any damage to the cutting teeth of the cutting head, and then an effective improvement method is proposed. This method of determining the damage of the cutting teeth is more accurate than the pure current change after multiple calibrations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of a bauxite mining roadheader with monitoring function;

[0023] Figure 2 This is a schematic diagram of the installation structure of the linear torsional stress strain gauge test module from a top view;

[0024] Figure 3 This is a side view of the installation structure of the linear torsion stress strain gauge test module;

[0025] Figure 4 This is a schematic diagram of the camera installation side view structure;

[0026] Figure 5 This is a schematic diagram of the camera installation upward-looking structure;

[0027] Figure 6 It is a schematic diagram of the rotating bracket installation structure. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1: Figure 1-6, a bauxite mining tunneling machine with a monitoring function includes a cantilever tunneling machine body 1, a wireless torsional stress strain gauge test module 2, an infrared camera 3 and a high-definition camera 4. The cantilever tunneling machine body 1 is provided with a cutting head 5, and the connecting shaft 401 of the cutting head 5 is rotatably connected to the telescopic part 6 and the end thereof away from the cutting head 5 is connected to the output shaft of the gearbox 7, the telescopic part 6 is connected to the end away from the cutting head 5 and is connected to the gearbox 7, the connecting shaft 401 of the cutting head 4 is installed with a wireless torsional stress strain gauge test module 2 for detecting its torsional stress, the infrared camera 3 and the high-definition camera 4 are installed on the telescopic part 6 through a hidden camera bracket 8, the infrared camera 3 and the high-definition camera 4 are respectively used to detect the cutting tooth temperature and tooth breakage of the cutting head, and also includes an annular spray pipe 9, two annular spray pipes 9 of different sizes are provided, which are fixedly connected to the rotating bracket 10 and are flared. The trumpet-shaped position is arranged outside the telescopic part 6, and the rotating bracket 10 is rotatably connected to the outer surface of the telescopic part 6 and is driven by the driving mechanism 12 to rotate back and forth within 180 degrees. A plurality of spray heads 11 are arranged in an annular staggered manner on the annular spray pipe 9, and the plurality of spray heads 11 are directed towards the cutting teeth of the cutting head 4. The present invention provides two annular spray pipes and staggered spray heads, and coordinates the back and forth rotation of the rotating bracket for spraying, which can effectively achieve dust reduction and reduce water consumption and avoid relying on water pressure to achieve large-area spraying, thereby achieving better energy saving and environmental protection; real-time torque measurement is integrated with temperature monitoring, which can accurately realize the changes in the resistance of the cutting head, and then perform corresponding cutting control parameter changes to improve the mining safety of the tunnel boring machine, and through the secondary calibration of the camera to detect broken teeth, improve detection accuracy, improve tunneling safety, and avoid the problem of increased tunneling energy consumption due to long-term tunneling under high friction, thereby achieving energy saving.

[0030] Among them, the driving mechanism 12 includes a ring gear 1201, a driving gear 1202 and a swing driving motor 1203. The ring gear 1201 is fixedly connected to the rotating bracket 10 and is located at one end of the principle cutting head. The driving gear 1202 is meshed with the ring gear 1201. The driving gear 1202 is fixedly connected to the motor shaft of the swing driving motor 1203. The swing driving motor 1203 is fixedly connected to the telescopic part 6 through the motor frame 1204. The rotating bracket 10 is rotatably connected to the telescopic part 6 through the bearing 1205. The rotating bracket is driven by the swing driving motor to rotate within 180 degrees. The drive is fast and stable. 10 includes an inner ring 1001 and multiple bent tubes 1002. The inner ring 1001 is rotatably connected to the telescopic part 6 through a bearing 1205. The multiple bent tubes 1002 are evenly fixedly connected to the inner ring 1001 in the circumferential direction and are bent toward the cutting head. The multiple bent tubes 1002 are fixedly connected to two annular spray pipes 9, and one of the bent tubes 1002 at the top is connected to the two annular spray pipes 9 as a water inlet pipe. The bent pipe 1002 is connected to a pumped water supply hose. The bracket support is stable and reliable, and acts as a water inlet pipe, reducing the complexity of the equipment and reducing costs. It can rotate back and forth within a range of 180 degrees without affecting the layout of the water supply pipe.

[0031] In order to achieve torque calibration more accurately, the bauxite mining roadheader with monitoring function also includes a current sensor for the drive motor that drives the gearbox 7. The current sensor is used to monitor the changes in the torsional torque of the cutting head. Torque, temperature and camera correction fusion temperature monitoring can further improve detection accuracy.

[0032] In order to be able to comprehensively and automatically analyze and obtain reliable and accurate results, the bauxite mining tunneling machine with monitoring function also includes a monitoring and analysis module. The monitoring and analysis module obtains the operating status of the cutting head based on the detection conditions of the current detection module, the wireless torsional stress strain gauge test module 2, the infrared camera 3 and the high-definition camera 4. The monitoring and analysis module automatically makes a fusion judgment based on the current, torque temperature and camera conditions, thereby improving the judgment accuracy and reliability and improving the judgment evaluation efficiency.

[0033] In order to facilitate the power supply of the wireless torsional stress and strain test piece module, the wireless torsional stress and strain test piece module 2 is connected to a temperature difference power generation module 13, and the temperature difference power generation module is connected to the inside of the cutting head 5. The wireless torsional stress and strain test piece module 2 is installed on the connecting shaft 401 located in the internal section of the cutting head 5. The temperature difference power generation module is set to power the infinite torsional stress and strain test piece module, and the temperature generated by the cutting head is used to generate electricity to power the test piece module, thereby avoiding the interference caused by the power supply to the rotating cutting head, and saving energy. The temperature difference power generation can also meet the power supply requirements. High temperature will be generated during the cutting process of the cutting head, and the temperature difference power generation module will be arranged by this high temperature, which can meet the power supply requirements and achieve energy consumption reduction and wiring structural complexity.

[0034] In order to facilitate the installation and accurate testing of the wireless torsional stress and strain test piece module, the wireless torsional stress and strain test piece module 2 includes a stress strain gauge 201 and a control circuit board 202. The stress strain gauge 201 is made of two pieces, which are cross-attached to the groove 203 set on the connecting shaft 401 and arranged at a 45° direction to the axis of the connecting shaft 401. The two stress strain gauges 201 are connected to the control circuit board 202 through a spiral signal line. The spiral signal line can better protect the connection point under vibration and avoid damage to the connector. The control circuit board 202 is fixedly connected in the groove 203, and the groove 203 is sealed with a sealing cover-20 4 is sealed and covered, the control circuit board 202 is connected to the temperature difference power generation module 13 through the cable 205, and a sealing sleeve is set at the place where the sealing cover 204 passes through the cable 205. Two stress strain gauges are used to test the torque, which can improve the test accuracy and facilitate installation. In addition, by setting the groove, it is avoided that the surface is occupied and the use of the connecting shaft is affected. The sealing cover is used to cover it to avoid external influences and also improve the test stability and reliability. The control circuit board 202 is fixedly connected to the groove 203 by screws and spring washers. The spring washers are placed between the control circuit board and the groove and maintain a certain elasticity, which can play a vibration damping role on the control circuit board.

[0035] In order to hide the camera conveniently and play a better protective role, the structure of the camera bracket 8 includes a camera mounting plate 801, a double-rod cylinder 802 and a sealing cover 803. The camera mounting plate 801 is fixedly connected to the infrared camera 3 and the high-definition camera 4 side by side. The camera mounting plate 801 is fixedly connected to the mounting plate 805 fixedly connected to the ends of the two cylinder rods of the double-rod cylinder 802 through the L-shaped plate 804. The tail end of the cylinder seat of the double-rod cylinder 802 is rotatably connected to the concave cavity 807 set on the top surface of the telescopic part 4 through the pitch axis 806. The elevation axis 806 is connected to a pitch motor 808 that drives its rotation. The pitch motor 808 is installed in a motor slot 809 on one side of the cavity 807. The sealing cover 803 is covered on the cavity 807 to hide the camera in the cavity, which can effectively protect the camera and prevent the camera from being damaged by stones flying during the use of the cutting head, thereby improving the safety of use. The cylinder telescopic drive is used to facilitate height control, thereby covering different ranges of shooting, and the pitch angle is controlled by the pitch motor to achieve the optimal pitch angle control.

[0036] In order to facilitate the sealing of the concave cavity, the sealing cover 803 is connected to the four connecting columns 811 through four tension springs 810. The four connecting columns 811 are symmetrically fixedly connected to the cylinder seat of the double-rod cylinder 802. The sealing cover 803 includes a first-section sealing cover 812 and a second-section sealing cover 813. The first-section sealing cover 812 is longer than the second-section sealing cover 813. The first-section sealing cover 812 is hinged to the second-section sealing cover 813. The second-section sealing cover 813 is hinged to the concave cavity away from the cutting head end. On the cavity 807, after the double-rod cylinder 802 rotates and is located in the concave cavity 807, the first-section sealing cover 812 can be elastically tightened on the sealing step 814 set at the cavity mouth of the concave cavity 807, and the second-section sealing cover 813 is sealed on the cavity mouth. A sponge layer 815 is provided at the bottom of the concave cavity 807. The two-section sealing cover is combined with four tension springs and connecting columns to achieve rapid and reliable covering and sealing of the cavity, avoid interference, and realize automatic opening and closing during the rotation of the hydraulic cylinder, thereby reducing power equipment, reducing costs, and saving energy.

[0037] Example 2: An operating method for a bauxite mining roadheader with a monitoring function, the method being as follows: during the horizontal cutting process of the roadheader controlling the cutting head 5, if the current sensor of the motor driving the cutting head 5 to rotate and the wireless torsional stress strain gauge test module 2 arranged on the connecting shaft respectively detect that a sudden inflection point occurs in the current curve and the torque, the feed rate of the cutting head 5 is controlled to be halved, the rotation speed is increased by 20%, the annular spray pipe is controlled to rotate back and forth to spray and spray water to cool the cutting teeth, if the current value and the torque of the cutting head are still twice that of normal cutting and are maintained for the set time, the feed rate of the cutting head 5 is continued to be controlled to be reduced by one third, the rotation speed is increased by 10%, the current sensor and the wireless torsional stress strain gauge test module 2 continue to detect the current value and the torque of the cutting head are still twice that of normal cutting and are maintained for the set time, the feed rate of the cutting head 5 is continued to be reduced by one third, the rotation speed is increased by 10%, the current sensor and the wireless torsional stress strain gauge test module 2 continue to detect the current value and the torque of the cutting head are still ... cutting head 5 is continued to be reduced by one third, the rotation speed is increased by 10%, the current sensor and the wireless torsional stress strain gauge test module 2 continue to detect the current value and the torque of the cutting head are still maintained for the set time, the cutting head 5 is continued to be reduced by one third, the rotation speed is increased by 10%, the current sensor and the wireless torsional stress strain gauge test module 2 continue to detect the current value and the torque of the cutting head are still maintained for the set time Flow size and torque size, annular spray pipe spray conditions and back-and-forth rotation, when the current and torque meet the set range, the speed and feed rate are controlled to cut, if the current and torque still do not meet the set range, then exit one-third of the cutting amount, annular spray pipe spray conditions and back-and-forth rotation, if the current and torque meet the corresponding set ranges respectively, maintain this state for cutting, if not, exit, slowly rotate the cutting head, use infrared camera 3 to detect the temperature of the cutting head and cutting teeth and use high-definition camera to collect pictures of the cutting head, if the collected temperature is higher than the set value and the picture taken by the high-definition camera is compared to confirm whether there is broken tooth, if so, stop the operation of the tunnel boring machine, repair the cutting teeth or replace the cutting head 5.

Claims

1. A bauxite mining roadheader with monitoring function, characterized in that: The invention comprises a cantilevered tunnel boring machine body (1), a wireless torsional stress strain gauge test module (2), an infrared camera (3) and a high-definition camera (4), wherein the cantilevered tunnel boring machine body (1) is provided with a cutting head (5), a connecting shaft (401) of the cutting head (5) is rotatably connected to an output shaft of a gearbox (7) at an end thereof away from the cutting head (5), the telescopic part (6) is connected to an end thereof away from the cutting head (5), and the connecting shaft (401) of the cutting head (4) is provided with a wireless torsional stress strain gauge test module (2) for detecting its torsional stress, an infrared camera (3) and a high-definition camera (4). A hidden camera bracket (8) is installed on the telescopic part (6), and an infrared camera (3) and a high-definition camera (4) are respectively used to detect the temperature of the cutting teeth and the broken teeth of the cutting head. The apparatus also includes an annular spray pipe (9), two annular spray pipes (9) of different sizes are provided, fixedly connected to the rotating bracket (10) and arranged in a trumpet-shaped position outside the telescopic part (6). The rotating bracket (10) is rotatably connected to the outer surface of the telescopic part (6) and is driven by a driving mechanism (12) to rotate back and forth within 180 degrees. A plurality of spray heads (11) are arranged in an annular staggered manner on the annular spray pipe (9), and the plurality of spray heads (11) face the cutting teeth of the cutting head (4); The camera bracket (8) includes a camera mounting plate (801), a double-rod cylinder (802) and a second sealing cover (803). The camera mounting plate (801) is fixedly connected to the infrared camera (3) and the high-definition camera (4) side by side. The camera mounting plate (801) is fixedly connected to the mounting plate (805) to which the ends of the two cylinder rods of the double-rod cylinder (802) are fixedly connected through an L-shaped plate (804). The tail end of the cylinder seat of the double-rod cylinder (802) is rotatably connected to a concave cavity (807) provided on the top surface of the telescopic part (4) through a pitch axis (806). The pitch axis (806) is connected to a pitch motor (808) for driving the pitch motor (808) to rotate. The pitch motor (808) is installed in a motor slot (809) on one side of the concave cavity (807). The second sealing cover (803) covers the concave cavity (807). The sealing cover The second (803) is connected to four connecting columns (811) through four tension springs (810), and the four connecting columns (811) are symmetrically fixedly connected to the cylinder base of the double-rod cylinder (802). The second sealing cover (803) includes a first-section sealing cover (812) and a second-section sealing cover (813). The first-section sealing cover (812) is longer than the second-section sealing cover (813). The first-section sealing cover (812) is hinged to the second-section sealing cover (813), and the second-section sealing cover (813) is hinged to the concave cavity (807) away from one end of the cutting head. After the double-rod cylinder (802) rotates and is located in the concave cavity (807), it can elastically tighten the first-section sealing cover (812) on the sealing step (814) set at the cavity opening of the concave cavity (807), and the second-section sealing cover (813) is sealed on the cavity opening.

2. The bauxite mining roadheader with monitoring function according to claim 1, characterized in that: It also includes a current sensor for a driving motor that drives the gearbox (7), and the current sensor is used to monitor changes in the torsional torque of the cutting head.

3. The bauxite mining roadheader with monitoring function according to claim 2, characterized in that: It also includes a monitoring and analysis module, which obtains an operating condition judgment of the cutting head based on the detection conditions of the current detection module, the wireless torsion stress strain gauge test module (2), the infrared camera (3) and the high-definition camera (4).

4. The bauxite mining roadheader with monitoring function according to claim 1, characterized in that: The wireless torsional stress strain gauge test module (2) is connected to a temperature difference power generation module (13), the temperature difference power generation module is connected inside the cutting head (5), and the wireless torsional stress strain gauge test module (2) is installed on a connecting shaft (401) located on an internal section of the cutting head (5).

5. The bauxite mining roadheader with monitoring function according to claim 1, characterized in that: The wireless torsional stress and strain test piece module (2) comprises a stress and strain gauge (201) and a control circuit board (202). The stress and strain gauge (201) is made of two pieces, which are cross-attached in a groove (203) provided on a connecting shaft (401) and arranged at a 45-degree angle to the axis of the connecting shaft (401). The two pieces are connected to the control circuit board (202). The control circuit board (202) is fixedly connected in the groove (203). The groove (203) is sealed with a sealing cover (204). The control circuit board (202) is connected to the temperature difference power generation module (13) via a cable (205). The sealing cover (204) passes through the cable (205) and a sealing sleeve is provided.

6. The method for operating a bauxite mining roadheader with a monitoring function according to claim 3, characterized in that: The method is as follows: during the horizontal cutting process, if the current sensor of the motor driving the cutting head (5) to rotate and the wireless torsional stress strain gauge test module (2) arranged on the connecting shaft respectively detect that the current curve and the torque have a sudden inflection point, the feed rate of the cutting head (5) is controlled to be halved and the rotation speed is increased by 20%, and the annular spray pipe is controlled to rotate back and forth to spray and spray water to cool the cutting teeth. If the current value and the torque of the cutting head are still twice that of normal cutting and are maintained for a set time, the feed rate of the cutting head (5) is continued to be controlled to be reduced by one third and the rotation speed is increased by 10%, and the current sensor and the wireless torsional stress strain gauge test module (2) continue to detect the current size and torque size. The annular spray pipe spray conditions and back-and-forth rotation, when the current and torque meet the set range, then control the speed and feed rate to cut, if the current and torque still do not meet the set range, then exit the cutting amount by one-third, the annular spray pipe spray conditions and back-and-forth rotation, if the current and torque meet the corresponding set range respectively, maintain the state of cutting, if not, exit, slowly rotate the cutting head, use the infrared camera (3) to detect the temperature of the cutting head and the cutting teeth and use the high-definition camera to collect pictures of the cutting head, if the collected temperature is higher than the set value and the pictures taken by the high-definition camera are compared to confirm whether there are broken teeth, if so, stop the operation of the tunnel boring machine, repair the cutting teeth or replace the cutting head (5).

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