Ventilation safety monitoring device for fully-mechanized excavation face of coal mine

Abstract

The invention provides a ventilation safety monitoring device for a fully-mechanized excavation face of a coal mine, and relates to the field of underground ventilation of coal mines. The ventilation safety monitoring device for the fully-mechanized excavation face of the coal mine comprises a wind speed detection mechanism and a support, the overall height of the support can be changed through deformation, a cross beam is fixedly installed at the top end of the support, the wind speed detection mechanism is connected with the cross beam, a downward protrusion is arranged on one side of the cross beam, and a motor is fixedly installed at one end of the protrusion of the cross beam. According to the ventilation safety monitoring device for the fully-mechanized excavation face of the coal mine, the wind speed detection mechanism and the wind power generation mechanism are mounted below the mounting sleeve, the mounting sleeve is connected to the outer surface of the rotating part in a sleeving mode, the rotating part is limited not to rotate, and wind speed collection can be conducted at different heights through stretching and retracting of the support; meanwhile, the sectional area of the roadway at the position can be established through the plane modeling mechanism, then the gas flow at the position is determined, and along with forward movement of the tunneling fully-mechanized face, air volume detection can be conducted through the moving device to a new position.

Description

Technical Field

[0001] The invention relates to the field of underground ventilation in coal mines, and in particular to a ventilation safety monitoring device for a fully mechanized excavation working face in a coal mine. Background Art

[0002] The purpose of mine ventilation is to continuously deliver an appropriate amount of fresh air from the surface to various air-requiring points underground under power drive, so as to ensure the normal physiological needs of underground workers and safe production of mines. In the daily operation of mines, accidents caused by poor management of mine ventilation systems are common.

[0003] The existing patent (CN115144610A) is a rectangular tunnel full-section scanning wind measurement system and its testing method. The first column assembly and the second column assembly are arranged opposite to each other, and the first column assembly and the second column assembly are vertically opened on the opposite surfaces. A mounting seat and a power assembly are slidingly arranged in the sliding cavity, and a facing wind speed sensor is arranged on the mounting seat. A self-alignment system for controlling the automatic alignment of the two groups of wind speed sensors is arranged on the mounting seat. The self-alignment system includes an electrically connected adjustment module and a capture module. The adjustment module is used to control the position of the facing wind speed sensor, and the capture module is used to measure the angle difference between the two groups of wind speed sensors.

[0004] This technical solution, through the setting of the self-alignment system, can make the opposite wind speed sensor self-align in real time each time the rectangular tunnel is fully scanned for wind measurement, so that the two sets of opposite wind speed sensors can maintain mutual alignment to perform wind speed scanning operations on the rectangular tunnel section. As the fully mechanized mining face moves forward, the wind measurement system needs to move with the excavation face. It is inconvenient to move the two symmetrical sets of devices together during the movement of the existing mechanism. At the same time, after the mobile wind measurement device moves for a long distance, a permanent wind measurement device needs to be installed in the formed tunnel. In the existing technology, it is difficult to carry a ladder to the designated location for installation. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a ventilation safety monitoring device for a coal mine fully mechanized excavation working face, which solves the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a ventilation safety monitoring device for a coal mine comprehensive excavation working face, comprising a wind speed detection mechanism and a bracket whose overall height can be changed by deformation, a crossbeam fixedly installed on the top of the bracket, the wind speed detection mechanism is connected to the crossbeam, a downward protrusion is provided on one side of the crossbeam, a motor is fixedly installed at one end of the protrusion of the crossbeam, the output end of the motor passes through the crossbeam and is rotatably connected to the crossbeam, a mounting plate is fixedly installed on the output end of the motor, and a plane modeling mechanism is fixedly installed on the surface of the mounting plate.

[0007] Preferably, the bracket includes a multi-stage telescopic sleeve, a base is fixedly installed at the bottom end of the multi-stage telescopic sleeve, the top end of the multi-stage telescopic sleeve is fixedly connected to the base through a compression spring, a reversing block is fixedly installed at the bottom end of the base, a traction rope is fixedly installed at the top end of the multi-stage telescopic sleeve, the traction rope bypasses the reversing block and extends to the top of the base, a winding wheel is fixedly installed above the base, and the traction rope is fixedly wound around the outer surface of the winding wheel.

[0008] Preferably, the cross beam includes a fixed part and a rotating part, the fixed part is fixedly connected to the bracket, the rotating part and the fixed part are hinged, two groups of positioning holes are opened on the side of the rotating part, the positioning holes and the fixed part are connected by a plug-in rod, and the plane modeling mechanism is arranged on the fixed part.

[0009] Preferably, it also includes a relay processor and a remote processor, a plurality of wind speed detection mechanisms are wirelessly connected to a relay processor, and a plurality of relay processors are signal-connected to a remote processor.

[0010] Preferably, the outer surface of the rotating part is slidably connected with a mounting sleeve, the wind speed detecting mechanism is fixedly installed below the mounting sleeve, a fixed magnetic ring is fixedly installed on one end of the rotating part close to the mounting sleeve, and a movable magnetic ring that attracts the fixed magnetic ring is fixedly installed on one end of the mounting sleeve close to the fixed magnetic ring.

[0011] Preferably, the mounting sleeve includes a sliding sleeve, wing plates are fixedly mounted on both sides of the sliding sleeve, a mounting plate is fixedly mounted on the bottom end of the sliding sleeve, the wind speed detection mechanism is fixedly mounted below the mounting plate, a threaded hole is opened in the middle of the wing plate, and gun nail brackets are arranged on both sides of the wing plate, and the gun nail brackets are threadedly connected to the threaded holes.

[0012] Preferably, a wind power generation mechanism and a battery are fixedly installed below the mounting plate, the wind power generation mechanism is electrically connected to an input terminal of the battery, and the wind speed detection mechanism is electrically connected to an output terminal of the battery.

[0013] Preferably, the wind power generation mechanism also includes a wind hood at the front end, and the wind hood is rotatably connected to the inside of the wind hood with a wind plate which is initially horizontal, and the central axis of the wind plate extends to the outside of the wind hood, and the central axis of the wind plate is located on the outside of the wind hood. One end of the wind plate is fixedly installed with a gear, and a rack plate is meshed with one side of the gear. The rack plate is slidably connected to the wind hood, and a permanent magnet plate is fixedly installed on the bottom end of the rack plate. The wind hood is located below the permanent magnet plate and is fixedly installed with an electromagnetic plate for driving the permanent magnet plate to slide, and the electromagnetic plate is electrically connected to the output end of the battery control.

[0014] Preferably, there are multiple wind plates, which are equidistantly arranged, and the distance between the wind plates is the same as the height of the wind plates, and the rack plate is meshed with the multiple gears.

[0015] Preferably, a rotatable roller is embedded at the bottom end of the base, and there are multiple rollers, which are evenly distributed.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The ventilation safety monitoring device for the coal mine comprehensive excavation working face has a wind speed detection mechanism and a wind power generation mechanism installed under the installation sleeve, and the installation sleeve is connected to the outer surface of the rotating part, so that the rotating part is limited to not rotate. The bracket is extended and retracted to collect wind speeds at different heights. At the same time, the cross-sectional area of ​​the tunnel at the location can be established through the plane modeling mechanism, and then the gas flow at the location can be determined. As the excavation and comprehensive excavation face moves forward, the wind volume can be detected at a new location through the mobile device.

[0018] 2. The ventilation safety monitoring device for the coal mine comprehensive excavation working face solves the problem of inconvenient installation of the detection mechanism in the prior art by arranging blasting nail brackets on both sides of the installation sleeve to support the device with the brackets, and using a blasting gun to fix the installation sleeve on the top of the tunnel.

[0019] 3. The ventilation safety monitoring device for the coal mine comprehensive excavation working face has a wind power generation mechanism and a battery fixedly installed under the mounting plate. The wind power generation mechanism is electrically connected to the input terminal of the battery, and the wind speed detection mechanism is electrically connected to the output terminal of the battery. The wind power generation mechanism is driven by the air flow in the tunnel to generate electrical energy which is stored in the battery for use by the wind speed detection mechanism and other detection sensors. At the same time, the wind power generation mechanism and other sensors use a lower voltage, which can reduce the laying of explosion-proof cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 A half-section schematic diagram of the stent of the present invention;

[0022] Figure 3 This is a schematic diagram of the crossbeam connection of the present invention;

[0023] Figure 4 This is a schematic diagram of the connection of the installation sleeve of the present invention;

[0024] Figure 5 This is a schematic diagram of the connection of the rotating part of the present invention;

[0025] Figure 6 It is a schematic diagram of the wind power generation mechanism of the present invention;

[0026] Figure 7 It is a partial schematic diagram of the wind plate of the present invention;

[0027] Figure 8It is a schematic diagram of the connection of the relay processor of the present invention.

[0028] In the figure: 1. wind speed detection mechanism; 2. bracket; 3. crossbeam; 4. motor; 5. mounting plate; 6. plane modeling mechanism; 201. multi-stage telescopic sleeve; 202. base; 203. compression spring; 204. reversing block; 205. traction rope; 206. winding wheel; 301. fixed part; 302. rotating part; 303. positioning hole; 304. plug-in rod; 7. relay processor; 8. remote processor; 9. mounting sleeve; 10. fixed magnetic ring; 11. movable magnetic ring; 901. sliding sleeve; 902. wing plate; 903. mounting plate; 904. threaded hole; 905. nail bracket; 12. wind power generation mechanism; 121. wind hood; 122. wind plate; 123. gear; 124. rack plate; 125. permanent magnet plate; 126. electromagnetic plate; 13. battery; 14. roller. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0033] like Figure 1-8 As shown, a ventilation safety monitoring device for a coal mine fully mechanized excavation working face comprises a wind speed detection mechanism 1 and a bracket 2 which can change the overall height by deformation. The bracket 2 can detect wind speed at any height by adjusting the height. A beam 3 is fixedly installed on the top of the bracket 2. The wind speed detection mechanism 1 is connected to the beam 3. A downward protrusion is provided on one side of the beam 3. A motor 4 is fixedly installed on one end of the protrusion of the beam 3. The output end of the motor 4 passes through the beam 3 and is rotatably connected to the beam 3. A mounting plate 5 is fixedly installed on the output end of the motor 4. A plane modeling mechanism 6 is fixedly installed on the surface of the mounting plate 5. The plane modeling mechanism 6 comprises an infrared rangefinder. The infrared rangefinder detects the distance to the cave wall during rotation, determines the area of ​​the cave entrance through multiple sets of continuous distances, and the flow rate of the gas at the cave entrance can be determined by knowing the area and wind speed.

[0034] The bracket 2 includes a multi-stage telescopic sleeve 201, a base 202 is fixedly installed at the bottom end of the multi-stage telescopic sleeve 201, the top of the multi-stage telescopic sleeve 201 is fixedly connected to the base 202 by a compression spring 203, a reversing block 204 is fixedly installed at the bottom end of the base 202, a traction rope 205 is fixedly installed at the top end of the multi-stage telescopic sleeve 201, the traction rope 205 bypasses the reversing block 204 and extends to the top of the base 202, a winding wheel 206 is fixedly installed above the base 202, and the traction rope 205 is fixedly wound around the outer surface of the winding wheel 206. Through such an arrangement, the traction rope 205 can be used to drive the bracket 2 to retract, and the spring 203 can be compressed and the bracket 2 can be unfolded, thereby reducing the volume of the device.

[0035] The crossbeam 3 includes a fixed part 301 and a rotating part 302. The fixed part 301 is fixedly connected to the bracket 2. The rotating part 302 is hinged to the fixed part 301. Two groups of positioning holes 303 are opened on the side of the rotating part 302. The positioning holes 303 and the fixed part 301 are connected by a plug-in rod 304. The plane modeling mechanism 6 is set on the fixed part 301. By rotating the rotating part 302, the rotating part 302 can be rotated to be parallel to the bracket 2, thereby reducing the volume after contraction.

[0036] It also includes a relay processor 7 and a remote processor 8. Multiple wind speed detection mechanisms 1 are wirelessly connected to a relay processor 7, and multiple relay processors 7 are signal-connected to a remote processor 8. Due to the excavation of the comprehensive mining face, multiple wind speed detection mechanisms 1 and various other sensors need to be installed. A large amount of data is generated and more data interfaces are required. Therefore, the relay processor 7 is required to process the data of the wind speed detection mechanism 1, and only the wind speed detection mechanism 1 with data errors will be reported to the remote processor 8.

[0037] The outer surface of the rotating part 302 is slidably connected to the mounting sleeve 9, the wind speed detection mechanism 1 is fixedly installed below the mounting sleeve 9, the end of the rotating part 302 close to the mounting sleeve 9 is fixedly installed with a fixed magnetic ring 10, and the end of the mounting sleeve 9 close to the fixed magnetic ring 10 is fixedly installed with a movable magnetic ring 11 that attracts the fixed magnetic ring 10. Through such an arrangement, it can be ensured that the mounting sleeve 9 can slide relative to the rotating part 302 under the action of external force.

[0038] The mounting sleeve 9 includes a sliding sleeve 901, wing plates 902 are fixedly installed on both sides of the sliding sleeve 901, a mounting plate 903 is fixedly installed on the bottom end of the sliding sleeve 901, and a wind speed detection mechanism 1 is fixedly installed below the mounting plate 903. A threaded hole 904 is provided in the middle of the wing plate 902, and gun nail brackets 905 are provided on both sides of the wing plate 902. The gun nail brackets 905 are threadedly connected with the threaded holes 904. Through such an arrangement, the mounting sleeve 9 can be fixed on the comprehensive mining face after excavation for continuous monitoring, and the gun nail brackets 905 are squeezed from below by an extended gun gun, and the gun nails are shot to the top of the cave to complete the fixation.

[0039] A wind power generation mechanism 12 and a battery 13 are fixedly installed below the mounting plate 903. The wind power generation mechanism 12 is electrically connected to the input end of the battery 13, and the wind speed detection mechanism 1 is electrically connected to the output end of the battery 13. The wind power generation mechanism 12 is driven by the air flow in the tunnel to generate electrical energy which is stored in the battery 13 for use by the wind speed detection mechanism 1 and other detection sensors. At the same time, the wind power generation mechanism 12 and other sensors use a lower voltage, which can reduce the laying of explosion-proof cables.

[0040] The wind turbine 12 also includes a wind shield 121 at the front end. The wind shield 121 can accelerate the wind speed passing through the wind turbine 12. The wind shield 121 is internally rotatably connected to a wind plate 122 that is initially horizontal. The central axis of the wind plate 122 extends to the outside of the wind shield 121. A gear 123 is fixedly installed at one end of the wind plate 122 located on the outside of the wind shield 121. A rack plate 124 is meshed with one side of the gear 123. The rack plate 124 is slidably connected to the wind shield 121. The rack plate 124 is slidably connected to the wind shield 121. A permanent magnet plate 125 is fixedly installed at the bottom end of 124, and an electromagnetic plate 126 for driving the permanent magnet plate 125 to slide is fixedly installed on the wind hood 121 below the permanent magnet plate 125. The electromagnetic plate 126 is electrically connected to the output end of the battery 13. When wind speed detection is required, the electromagnetic plate 126 drives the rack plate 124 to move, so that the wind plate 122 can be closed and the wind turbine 12 is no longer driven to work, thereby reducing the influence of the rotation of the blades of the wind turbine 12 on the wind speed detection.

[0041] There are multiple wind plates 122, and the multiple wind plates 122 are equidistantly arranged. The distance between the wind plates 122 is the same as the height of the wind plates 122. The rack plate 124 is meshed with multiple gears 123. Through such an arrangement, the space occupied by the rotation of the wind plates 122 is reduced, and the volume of the wind hood 121 can be reduced.

[0042] The bottom end of the base 202 is inlaid with rotatable rollers 14. There are multiple rollers 14, and the multiple rollers 14 are evenly distributed. This arrangement makes it easier to move the device.

[0043] When in use, the wind speed detection mechanism 1 and the wind power generation mechanism 12 are installed under the mounting sleeve 9, and the mounting sleeve 9 is sleeved on the outer surface of the rotating part 302, so that the rotating part 302 is limited to not rotate. The bracket 2 is extended and retracted to collect wind speeds at different heights. At the same time, the cross-sectional area of ​​the tunnel at the location can be established through the plane modeling mechanism 6, and the gas flow at the location can be determined. As the excavation and comprehensive mining face moves forward, the wind volume can be detected at a new location through the mobile device.

[0044] At the same time, due to the forward movement of the excavation and comprehensive mining face, a permanent detection mechanism needs to be set up in the tunnel. By setting blasting nail brackets 905 on both sides of the installation sleeve 9, the device is supported by the bracket 2, and the installation sleeve 9 is fixedly installed on the top of the tunnel by a blasting gun, which solves the problem of inconvenient installation of the detection mechanism in the prior art.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0046] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ventilation safety monitoring device for a coal mine fully mechanized excavation working face, comprising a wind speed detection mechanism (1) and a bracket (2) capable of changing the overall height by deformation, characterized in that: A crossbeam (3) is fixedly mounted on the top of the bracket (2), the wind speed detection mechanism (1) is connected to the crossbeam (3), a downward protrusion is provided on one side of the crossbeam (3), a motor (4) is fixedly mounted on one end of the protrusion of the crossbeam (3), the output end of the motor (4) passes through the crossbeam (3) and is rotatably connected to the crossbeam (3), a mounting plate (5) is fixedly mounted on the output end of the motor (4), and a plane modeling mechanism (6) is fixedly mounted on the surface of the mounting plate (5).

2. A ventilation safety monitoring device for a coal mine fully mechanized excavation working face according to claim 1, characterized in that: The bracket (2) comprises a multi-stage telescopic sleeve (201), a base (202) is fixedly mounted on the bottom end of the multi-stage telescopic sleeve (201), a top end of the multi-stage telescopic sleeve (201) is fixedly connected to the base (202) via a compression spring (203), a reversing block (204) is fixedly mounted on the bottom end of the base (202), a traction rope (205) is fixedly mounted on the top end of the multi-stage telescopic sleeve (201), the traction rope (205) bypasses the reversing block (204) and extends to the top of the base (202), a winding wheel (206) is fixedly mounted on the top of the base (202), and the traction rope (205) is fixedly wound around the outer surface of the winding wheel (206).

3. A ventilation safety monitoring device for a coal mine fully mechanized excavation working face according to claim 2, characterized in that: The crossbeam (3) comprises a fixed portion (301) and a rotating portion (302); the fixed portion (301) is fixedly connected to the bracket (2); the rotating portion (302) and the fixed portion (301) are hinged; two groups of positioning holes (303) are provided on the side of the rotating portion (302); the positioning holes (303) and the fixed portion (301) are connected by means of a plug-in rod (304); and the plane modeling mechanism (6) is arranged on the fixed portion (301).

4. A ventilation safety monitoring device for a coal mine fully mechanized excavation working face according to claim 3, characterized in that: It also includes a relay processor (7) and a remote processor (8), wherein a plurality of wind speed detection mechanisms (1) are wirelessly connected to a relay processor (7), and a plurality of relay processors (7) are signal-connected to a remote processor (8).

5. A ventilation safety monitoring device for a coal mine fully mechanized excavation working face according to claim 4, characterized in that: The outer surface of the rotating part (302) is slidably connected to a mounting sleeve (9); the wind speed detection mechanism (1) is fixedly mounted below the mounting sleeve (9); a fixed magnetic ring (10) is fixedly mounted on one end of the rotating part (302) close to the mounting sleeve (9); and a movable magnetic ring (11) that attracts the fixed magnetic ring (10) is fixedly mounted on one end of the mounting sleeve (9) close to the fixed magnetic ring (10).

6. A ventilation safety monitoring device for a coal mine fully mechanized excavation working face according to claim 5, characterized in that: The mounting sleeve (9) comprises a sliding sleeve (901), wing plates (902) are fixedly mounted on both sides of the sliding sleeve (901), a mounting plate (903) is fixedly mounted on the bottom end of the sliding sleeve (901), a wind speed detection mechanism (1) is fixedly mounted below the mounting plate (903), a threaded hole (904) is provided in the middle of the wing plate (902), nail brackets (905) are provided on both sides of the wing plate (902), and the nail brackets (905) are threadedly connected to the threaded holes (904).

7. A ventilation safety monitoring device for a coal mine fully mechanized excavation working face according to claim 6, characterized in that: A wind power generation mechanism (12) and a storage battery (13) are fixedly mounted below the mounting plate (903); the wind power generation mechanism (12) is electrically connected to an input end of the storage battery (13); and the wind speed detection mechanism (1) is electrically connected to an output end of the storage battery (13).

8. A ventilation safety monitoring device for a coal mine fully mechanized excavation working face according to claim 7, characterized in that: The wind power generation mechanism (12) further comprises a wind hood (121) at the front end, wherein the wind hood (121) is rotatably connected to a wind plate (122) which is initially horizontal, wherein the central axis of the wind plate (122) extends to the outside of the wind hood (121), wherein a gear (123) is fixedly mounted on one end of the wind plate (122) located outside the wind hood (121), wherein a rack plate (124) is meshed with one side of the gear (123), wherein the rack plate (124) is slidably connected to the wind hood (121), wherein a permanent magnet plate (125) is fixedly mounted on the bottom end of the rack plate (124), wherein an electromagnetic plate (126) for driving the permanent magnet plate (125) to slide is fixedly mounted on the wind hood (121) below the permanent magnet plate (125), wherein the electromagnetic plate (126) is electrically connected to the output end of the storage battery (13) under control.

9. A ventilation safety monitoring device for a coal mine fully mechanized excavation working face according to claim 8, characterized in that: The number of the wind plates (122) is multiple, the multiple wind plates (122) are arranged at equal intervals, the distance between the wind plates (122) is the same as the height of the wind plates (122), and the rack plate (124) is meshed with the multiple gears (123).

10. A ventilation safety monitoring device for a coal mine fully mechanized excavation working face according to claim 9, characterized in that: The bottom end of the base (202) is inlaid with a rotatable roller (14), and there are a plurality of rollers (14), which are evenly spaced.

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