CN111441809A

CN111441809A - Protective trolley

Info

Publication number: CN111441809A
Application number: CN202010408631.2A
Authority: CN
Inventors: 马栋; 程红彬; 王武现; 吴庆红; 向大强; 李燕松; 孙毅; 武彬华; 冯义涛; 马利; 李永刚; 闫肃
Original assignee: China Railway 16th Bureau Group Co Ltd; China Railway 16th Bureau Group Beijing Jiangong Machinery Co Ltd
Current assignee: China Railway 16th Bureau Group Co Ltd; China Railway 16th Bureau Group Beijing Jiangong Machinery Co Ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2020-07-24

Abstract

The invention discloses a protective trolley, which belongs to the field of tunnel construction equipment, and adopts the technical scheme that the protective trolley comprises a frame body, wherein a falling rock buffer assembly is fixedly connected to the outer side of the frame body, a spraying assembly is connected to the falling rock buffer assembly in a sliding manner along the outline direction of the falling rock buffer assembly, a travelling mechanism and a jacking mechanism are fixedly connected to the bottom of the frame body, and emergency refuge assemblies are fixedly connected to two sides of the frame body; the rockfall buffering assembly comprises an arch frame fixedly connected with the frame body and a protective net fixedly connected with the arch frame, and the protective net covers the emergency refuge assembly in the vertical direction; the jacking mechanism comprises a hydraulic cylinder fixedly connected with the frame body and a support rod fixedly arranged on the hydraulic cylinder, and the support rod is horizontally arranged. In addition, the technical scheme recorded by the invention is also provided with a non-contact tunnel engineering construction rock burst implementation forecasting system, the rock burst prevention effect is achieved through software, the effect of reducing the potential safety hazard in the tunnel excavation process is achieved by matching with the hardware arrangement of the invention, and the system is applied to tunnel construction.

Description

Protective trolley

Technical Field

The invention relates to tunnel excavation protection, in particular to a protection trolley.

Background

Rock burst is the phenomenon that the stress of surrounding rocks is redistributed due to the influence of excavation unloading on rock masses, stress concentration and strain energy accumulation are generated near the tunnel wall, and further the surrounding rocks are randomly cracked, ejected and thrown out in space, and the phenomenon is very prominent particularly on the tunnel face, the tunnel vault and the tunnel shoulder of a deeply buried tunnel. Rock burst is used as a geological disaster, which not only can cause equipment loss, engineering failure and construction period delay, but also can greatly threaten the life safety of construction technicians, and has the characteristics of burstiness, randomness, harshness and the like. Therefore, in order to reduce the threat to constructors and construction equipment when a rock burst occurs, it is necessary to design a protective device.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a protective trolley, which is matched with a non-contact tunnel engineering construction rock burst real-time forecasting system by reducing the possibility that falling rocks fall onto the ground in the tunnel excavation process, so that the effect of reducing the possibility of injury of workers is achieved.

In order to achieve the purpose, the invention provides the following technical scheme: a protective trolley comprises a frame body, wherein a falling rock buffer assembly is fixedly connected to the outer side of the frame body, a spraying assembly is connected to the falling rock buffer assembly in a sliding mode along the outline direction of the falling rock buffer assembly, a travelling mechanism and a jacking mechanism are fixedly connected to the bottom of the frame body, and emergency refuge assemblies are fixedly connected to two sides of the frame body; the rockfall buffering assembly comprises an arch frame fixedly connected with the frame body and a protective net fixedly connected with the arch frame, and the protective net covers the emergency refuge assembly in the vertical direction; the jacking mechanism comprises a hydraulic cylinder fixedly connected with the frame body and a supporting rod fixedly arranged on the hydraulic cylinder, the supporting rod is horizontally arranged, and when a piston rod of the hydraulic cylinder extends to the maximum degree, the supporting rod is positioned below the walking mechanism.

By adopting the technical scheme, the falling rock buffer assembly is matched with the frame body, so that falling rocks falling from the top of the tunnel can be received in the tunnel excavation process, and workers are protected; the emergency refuge component can provide a temporary refuge place for workers when dangerous situations occur in the tunnel excavation process, so that more time is provided for rescue work, and the workers are protected; climbing mechanism cooperation running gear can adapt to more not tunnels of equidimension for the suitability has obtained the improvement, and can reduce the distance between falling rock buffering subassembly and the inside top surface in tunnel through climbing mechanism, reduce the whereabouts height of falling rock, reduce the size of the kinetic potential energy of the gravitational potential energy conversion of falling rock, reduce the impact of falling rock to falling rock buffering subassembly, the practical life of extension falling rock buffering subassembly makes falling rock buffering subassembly can more effectually accept falling rock simultaneously, reduce the potential safety hazard.

Preferably, the following steps: the hydraulic cylinder is vertically arranged, and a piston rod of the hydraulic cylinder is located in the middle section of the supporting rod.

Through adopting above-mentioned technical scheme, can make the bracing piece atress more even for the pneumatic cylinder can be stable with bracing piece butt on the bottom surface, realize the jacking of support body and fixed.

Preferably, the following steps: the arch frame is arched, and the protective net is arched and is sunken towards the direction of the frame body.

Through adopting above-mentioned technical scheme, the staff of arched bow member protection rockfall buffering subassembly below that can be more comprehensive can accept the rockfall to the sunken protection network of support body direction for the rockfall is concentrated on the protective screen, and combines arched bow member to make the rockfall on the protection network slide to the support body both sides, reduces the protection network and receives the influence of rockfall gravity for a long time, has prolonged the life of protection network.

Preferably, the following steps: the walking mechanism and the jacking mechanism are provided with baffles, and the baffles shield the walking mechanism and the jacking mechanism in the advancing direction of the frame body.

Through adopting above-mentioned technical scheme, can reduce the stone that falls the stone or the splashing of tunnel one side and hit on running gear and climbing mechanism, cause running gear and climbing mechanism damage's possibility, prolong running gear and climbing mechanism's life.

Preferably, the emergency shelter assembly comprises a protection plate fixedly arranged on the frame body, an oxygen supply device fixedly arranged on the protection plate and a fixing piece fixedly connected to the protection plate, wherein the protection plate is in an inverted L shape and forms a space for accommodating people with the frame body.

By adopting the technical scheme, the inverted L-shaped protection plate can provide a protected space for the refugee, the possibility that falling rocks directly fall down to crush the refugee is reduced, the fixing part can provide a hand-holding or fixing position for the refugee, so that the refugee can stably stay below the protection plate, meanwhile, the oxygen supply device can provide enough oxygen for the refugee, and better conditions and longer survival time are provided for the refugee to wait for rescue.

Preferably, the following steps: the side wall of the protection plate, which is opposite to the fixing part, is fixedly connected with a soft pad which accords with human engineering.

Through adopting above-mentioned technical scheme, the setting of cushion can make the impact that reduces the refugee and receive when the dangerous situation appears, and the refugee can make oneself more stable stop in the current position through being close to on the cushion simultaneously, has reduced the possibility that the refugee is shaken from the protection zone of guard plate and causes the casualties when experiencing vibrations, has further reduced the potential safety hazard.

Preferably, the following steps: the fixing part comprises two fixing rods hinged to the protection plate, a buffer device is connected between the fixing rods and the protection plate, the rotating axes of the fixing rods are horizontally arranged, and a space for the head of the refuge to pass through is reserved between the two fixing rods.

Through adopting above-mentioned technical scheme, the user can stand between two dead levers to rotate two dead levers to the position department that is located the head both sides respectively, support the health through two dead levers promptly and tightly on the cushion, dead lever self-oscillation's possibility when reducing vibrations in the dangerous situation simultaneously through buffer makes that the staff can more stable stop in current position department, has further reduced the potential safety hazard.

Preferably, the following steps: the fixed rod is connected with the protection plate through a hydraulic hinge.

Through adopting above-mentioned technical scheme, hydraulic hinge technology is mature, and the source is extensive, the maintenance of being convenient for.

Preferably, the following steps: two groups of emergency refuge assemblies are arranged at two ends of the rockfall buffering assembly respectively.

By adopting the technical scheme, the emergency refuge assemblies are arranged at the two ends of the rockfall buffering assembly, so that workers can enter the rockfall buffering assembly more quickly, the number of the accommodated workers is increased, and the possibility of direct casualties of the workers is further reduced when dangerous situations occur.

Preferably, the following steps: the spraying assembly comprises a rail trolley connected to the arch center in a sliding mode and a spraying hose fixedly arranged on the rail trolley, and the spraying hose is arranged towards the protective net.

Through adopting above-mentioned technical scheme, the surrounding rock can be softened in the setting of spraying assembly, reduces the fragility of surrounding rock around, just so can reduce the inside internal stress in tunnel, has reduced the intensity of ground stress outburst, just so can effectively reduce the rock burst risk, can also spray the dust in the tunnel simultaneously, makes it subside after combining with the drop of water, can also provide the water source for the person of taking shelter when the dangerous situation takes place simultaneously, has further reduced the rescue degree of difficulty, has improved the security.

In summary, compared with the prior art, the invention has the following beneficial effects:

1. the falling rock buffer assembly is matched with the frame body, so that falling rocks falling from the top of the tunnel can be received in the tunnel excavation process, and workers are protected; the emergency refuge component can provide a temporary refuge place for workers when dangerous situations occur in the tunnel excavation process, so that more time is provided for rescue work, and the workers are protected; the jacking mechanism is matched with the walking mechanism to be capable of adapting to more tunnels with different sizes, so that the applicability is improved, the distance between the rockfall buffer assembly and the top surface inside the tunnel can be reduced through the jacking mechanism, the falling height of the rockfall is reduced, the kinetic potential energy converted from the gravitational potential energy of the rockfall is reduced, the impact of the rockfall on the rockfall buffer assembly is reduced, the practical service life of the rockfall buffer assembly is prolonged, meanwhile, the rockfall buffer assembly can more effectively receive the rockfall, and the potential safety hazard is reduced;

2. the arched arch frame can protect workers below the rockfall buffering assembly more comprehensively, the protective net sunken to the direction of the frame body can accept rockfall, the rockfall is concentrated on the protective net, the rockfall on the protective net slides to the two sides of the frame body by combining the arched arch frame, the influence of the rockfall gravity on the protective net for a long time is reduced, and the service life of the protective net is prolonged;

3. the surrounding rock can be softened in the setting of spraying assembly, reduces the fragility of surrounding rock around, just so can reduce the inside internal stress in tunnel, has reduced the intensity of ground stress outburst, just so can effectively reduce the rock burst risk, can also spray the dust in the tunnel simultaneously, makes it subside after combining with the drop of water, can also provide the water source for the person of taking shelter when the dangerous situation takes place simultaneously, has further reduced the rescue degree of difficulty, has improved the security.

Drawings

FIG. 1 is an isometric view of an embodiment;

FIG. 2 is a schematic view showing a frame structure in the embodiment;

FIG. 3 is an enlarged view of portion A of FIG. 2 showing the bottom pole structure;

FIG. 4 is an enlarged view of portion B of FIG. 2 showing the top pole structure;

FIG. 5 is a schematic view showing a structure of a protective net in the embodiment;

FIG. 6 is a schematic view showing the structure of the arch in the embodiment;

FIG. 7 is an enlarged view of the portion C of FIG. 5 showing the structure of the support plate;

FIG. 8 is an enlarged view of the portion D of FIG. 6 showing the impact net structure;

FIG. 9 is an enlarged view of a portion E of FIG. 1 showing the position of the traveling mechanism;

FIG. 10 is an enlarged view of the portion F of FIG. 1 showing the structure of the emergency evacuation module;

fig. 11 is an enlarged view of a portion G showing the structure of the shower unit in fig. 1.

Reference numerals: 1. a top connection frame; 11. a long top rod; 12. a top short bar; 13. a top connecting block; 14. a top upright rod; 141. a top stiffener; 142. a top stiffener; 15. a middle connecting frame; 151. a middle long rod; 1522. a middle short bar; 153. a middle connecting block; 16. a top safety ladder; 161. a bottom safety ladder; 17. A bottom upright rod; 171. a bottom stiffener; 172. a bottom reinforcing block; 18. a middle stiffener; 2. a protective net; 21. a shock-resistant mesh; 22. net-holding; 23. an arch frame; 231. a top frame; 231. a chassis; 24. a holder; 241. a support plate; 242. a high-strength bolt; 243. a wear-resistant sleeve; 244. a nut; 3. a frame body; 31. a base plate; 4. a rock fall buffer assembly; 5. a jacking mechanism; 51. a hydraulic cylinder; 52. a support bar; 53. a baffle plate; 6. a traveling mechanism; 7. a spray assembly; 71. a spray hose; 72. a rail trolley; 8. an emergency evacuation component; 81. a protection plate; 82. an oxygen supply device; 83. fixing the rod; 84. a hydraulic hinge; 85. a soft cushion.

Detailed Description

Example (b): the utility model provides a protection platform truck, refers to fig. 1, includes

support body

3, and 3 bottom fixed connection of support body have the bottom plate 31 of level setting, and fixedly connected with drive support body 3 travelling mechanism 6 that removes on the bottom surface of bottom plate 31, and travelling mechanism 6 in this embodiment adopts motor drive's solid rubber wheel. The four running mechanisms 6 are evenly distributed in four rectangular sharp-angle shapes. The bottom plate 31 on one side of the travelling mechanism 6 is fixedly connected with the jacking mechanism 5 which is vertically arranged, and one side of each travelling mechanism 6 is provided with only one jacking mechanism 5. The two sides of the frame body 3 are fixedly connected with emergency refuge assemblies 8. The top end of the frame body 3 is fixedly connected with an arched falling rock buffer assembly 4, and two ends of the falling rock buffer assembly 4 are respectively located at the two emergency refuge assemblies 8. The falling rock buffer assembly 4 is connected with a spraying assembly 7 along the contour thereof in a sliding way. All set firmly the emergency ladder on middle part carriage 15 and the top carriage 1, the extending direction of two emergency ladders is the contained angle setting, connects to be top emergency ladder 16 on top carriage 1, connects to be bottom emergency ladder 161 on middle part carriage 15, and top emergency ladder 16 all passes through bolted connection with protection platform truck support with bottom emergency ladder 161. Because detachable bolted connection between emergency ladder and the protection platform truck, can also change the quantity and the mounted position of emergency ladder certainly according to the operating mode, for example install the emergency ladder in one side of protection platform truck support etc..

Referring to fig. 2 and 3, the support body includes six bottom pole settings 17 of vertical setting, three a set of symmetry settings of six bottom pole settings 17, bottom pole setting 17 is the i-steel of vertical setting, six bottom pole settings 17 are two relative side form distributions of rectangle, all set firmly the bottom stiffener 171 that the slope set up in a set of three bottom pole settings 17 on the bottom pole setting 17 that lies in both sides, the bottom of bottom stiffener 171 and the bottom parallel and level of bottom pole setting 17, two bottom stiffeners 171 on the same bottom pole setting 17 are the setting of the decurrent V word form of opening, the bottom pole setting 17 of i-steel form is connected with the inside fixedly connected with bottom stiffener 172 of recess of bottom stiffener 171 department and the one end fixed connection of bottom stiffener 171.

The side wall of the bottom vertical rod 17 is fixedly connected with an obliquely arranged middle reinforcing rod 18, and the side wall of the bottom vertical rod 17 connected with the middle reinforcing rod 18 is perpendicular to the side wall thereof connected with the bottom reinforcing rod 171. The bottom end of the middle reinforcing rod 18 is located between the top end of the bottom reinforcing rod 171 and the bottom upright rod 17, and the top end is fixedly connected with a middle connecting frame 15 which is horizontally arranged. The middle connecting frame 15 comprises a middle long rod 151 connected to the top end of the bottom vertical rod 17 and a middle short rod 1522 fixedly arranged between two adjacent middle long rods 151.

Referring to fig. 3 and 4, the middle long rods 151 are three in number, and two ends of the three middle long rods 151 are respectively fixedly connected to the top ends of the six bottom vertical rods 17, the middle short rods 1522 are ten in number, and the ten middle short rods 1522 are uniformly distributed between two gaps formed by the three middle long rods 151 and form a net frame-shaped structure. Middle part stock 151 is the I-steel form, and middle part stock 151 is connected with middle part connecting block 153 of fixedly connected with in the recess of middle part quarter butt 1522 department, middle part connecting block 153 and middle part quarter butt 1522 fixed connection.

The top surface fixedly connected with of middle part carriage 15 is the top pole setting 14 of the vertical setting, and the bottom fixed connection of top pole setting 14 is on the top surface of middle part stock 151, and the bottom of top pole setting 14 and the connected node of middle part carriage 15 crisscross distribution, and middle part stock 151 is connected with the position of middle part quarter butt 1522 promptly and the position crisscross distribution that middle part stock 151 is connected with top pole setting 14. The top end is fixedly connected with a horizontally arranged top connecting frame 1. The top attachment frame 1 includes a top long pole 11 fixedly connected to a top upright 14 and a top short pole 12 fixedly connected to the top upright 14. The top upright rods 14 are evenly and symmetrically distributed on three middle long rods 151 in groups of six and three. The top pole 11 has three, and the both ends of three top poles 11 are fixed connection respectively on the top of six top pole settings 14, and top pole 11 is on a parallel with middle part stock 151. The top short rods 12 are distributed between two gaps formed by the three top long rods 11, and the top short rods 12 are parallel to the middle short rods 1522. The top connecting rods are perpendicular to the top short rods 12 and form a net frame-like structure. Both ends of the top connection frame 1 are located between both ends of the middle connection frame 15 in the vertical direction. Top pole setting 14 and top quarter butt 12 all are the I-steel form, and the inside fixedly connected with top connecting block 13 of recess of top pole setting 14 and top quarter butt 12 junction, top connecting block 13 and top quarter butt 12 fixed connection.

Fixedly connected with top stiffener 141 that the slope set up on a top pole setting 14 among a set of three top pole settings 14, top stiffener 141's bottom fixed connection is on a top pole setting 14 among a set of three top pole settings 14, and top fixed connection is on another top pole setting 14 of this top pole setting 14 one side, and connects two top stiffeners 141 on same top pole setting 14 and be the ascending V word setting of opening.

Referring to fig. 5 to 8, the rockfall buffering assembly 4 includes a pair of arched arches 23 and a protection net 2 located on the arched arch 23, a fixer 24 for connecting the protection net of the rock burst protection trolley is fixedly connected to the arched arch 23, the fixer 24 includes a support plate 241 fixedly disposed on the arched arch 23 and a high-strength bolt 242 bolted to the support plate 241, the high-strength bolt 242 is obliquely disposed, the head of the high-strength bolt 242 is higher than the thread tail end thereof, the thread tail ends of the high-strength bolts 242 on the two arched arches 23 are disposed back to back, the thread tail end of the high-strength bolt 242 is threadedly connected with a nut 244, and two support plates 241 are disposed between the high-strength bolt 242 and the nut 244 threadedly connected therewith. A tubular wear-resistant sleeve 243 is sleeved on the high-strength bolt 242 between the two support plates 241, and two ends of the wear-resistant sleeve 243 are respectively abutted to the two support plates 241. The arched protection net 2 is sleeved on the wear-resistant sleeves 243, and two sides of the protection net 2 are respectively connected with the wear-resistant sleeves 243 on the two arches 23. The top surface and the bottom surface of the protective net 2 are both curved surfaces, and the arched protective net 2 protrudes towards the inside of the enclosed area to form an inner concave part; the protective net 2 is tied with a pocket net 22, two sides of the pocket net 22 are located between two sides of the protective net 2, a central line of the pocket net 22 arranged along the length direction of the pocket net 22 is located at the position with the largest curvature of the concave part, and the pocket net 22 is located on one side of the protective net 2 in a region surrounded by the pocket net 22; the two sides of the protection net 2 are respectively tied with the anti-impact nets 21, the two sides of the pocket net 22 are respectively positioned between the two sides of the two anti-impact nets 21, the two sides of the anti-impact nets 21 are positioned between the two sides of the protection net 2, the two sides of the pocket net 22 are respectively tied with the two anti-impact nets 21, the opposite side edges of the two anti-impact nets 21 are respectively tied with the pocket net 22, and the pocket net 22 and the anti-impact nets 21 are respectively positioned on the two sides of the protection net 2; the impact-resistant net 21 and the pocket net 22 are both attached to the protection net 2.

Referring to fig. 9, the jacking mechanism 5 includes a hydraulic cylinder 51 fixed on the bottom plate 31 and a support rod 52 fixed on the end of the piston rod of the hydraulic cylinder 51, the hydraulic cylinder 51 is vertically disposed downwards, the support rod 52 is horizontally disposed, and the end of the piston rod of the hydraulic cylinder 51 is fixed at the midpoint of the support rod 52. The cylinder body of the hydraulic cylinder 51 is fixedly connected with a baffle 53 which is vertically arranged, and the baffle 53 shields the jacking mechanism 5 and the travelling mechanism 6 in the advancing direction of the frame body 3.

Referring to fig. 9 and 10, the emergency refuge assembly 8 includes a protection plate 81 fixedly connected to the frame body 3, an oxygen supply device 82 fixedly installed on the protection plate 81, and a fixing member hinged to the protection plate 81, the fixing member in this embodiment is a fixing rod 83 hinged to the protection plate 81, each of two rods of the fixing rod 83 having an obtuse angle is formed by welding one end of the rod, the protection plate 81 is formed by an inverted L, the oxygen supply device 82 is located at the top end of the bending region of the protection plate 81, the fixing rod 83 is located below the oxygen supply device 82, a buffer device is arranged between the fixing rod 83 and the protection plate 81, the buffer device in this embodiment is a hydraulic hinge 84, the fixing rod 83 is connected to the protection plate 81 through the hydraulic hinge 84, and a space for the head of the refuge person to pass through is reserved between.

Referring to fig. 11, the spraying assembly 7 includes a rail car 72 slidably connected to the arch 23 and a spraying hose 71 fixedly mounted on the rail car 72, the spraying hose 71 is disposed toward the protection net 2, and two rail cars 72 are respectively located above the two arches 23. The surrounding rock can be softened in the setting of spray assembly, reduces the fragility of surrounding rock around, just so can reduce the inside internal stress in tunnel, has reduced the intensity of ground stress outburst, just so can effectively reduce the rockburst risk.

In addition, the technical scheme recorded by the invention is also provided with a non-contact tunnel engineering construction rock burst implementation forecasting system, the area and the possibility of the possible rock burst of the surrounding rock are forecasted by detecting the temperature change and the deformation change of the surrounding rock, the rock burst is prevented through software, and the effect of reducing the potential safety hazard in the tunnel excavation process is achieved by matching with the hardware arrangement of the invention.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides a protection platform truck which characterized in that: the emergency refuge device comprises a frame body (3), wherein a falling rock buffer assembly (4) is fixedly connected to the outer side of the frame body (3), a spraying assembly (7) is connected to the falling rock buffer assembly (4) in a sliding mode along the outline direction of the falling rock buffer assembly, a travelling mechanism (6) and a jacking mechanism (5) are fixedly connected to the bottom of the frame body (3), and emergency refuge assemblies (8) are fixedly connected to the two sides of the frame body (3); the rockfall buffering assembly (4) comprises an arch frame (23) fixedly connected with the frame body (3) and a protective net (2) fixedly connected with the arch frame (23), and the protective net (2) covers the emergency refuge assembly (8) in the vertical direction; the jacking mechanism (5) comprises a hydraulic cylinder (51) fixedly connected with the frame body (3) and a support rod (52) fixedly arranged on the hydraulic cylinder (51), the support rod (52) is horizontally arranged, and when a piston rod of the hydraulic cylinder (51) extends to the maximum degree, the support rod (52) is positioned below the walking mechanism (6).

2. The protective trolley of claim 1, wherein: the hydraulic cylinder (51) is vertically arranged, and a piston rod of the hydraulic cylinder (51) is positioned at the middle section of the support rod (52).

3. The protective trolley according to claim 2, wherein: the arch frame (23) is arched, and the protective net (2) is arched and is sunken towards the frame body (3).

4. A protective trolley according to claim 3, characterized in that: the travelling mechanism (6) and the jacking mechanism (5) are provided with a baffle (53), and the baffle (53) shields the travelling mechanism (6) and the jacking mechanism (5) in the advancing direction of the frame body (3).

5. The protection trolley according to claim 4, characterized in that the emergency evacuation assembly (8) comprises a protection plate (81) fixed on the frame body (3), an oxygen supply device (82) fixed on the protection plate (81), and a fixing part fixedly connected to the protection plate (81), wherein the protection plate (81) is in an inverted L shape and forms a space for accommodating people with the frame body (3).

6. The protective trolley of claim 5, wherein: the side wall of the protection plate (81) opposite to the fixing part is fixedly connected with a soft pad (85) conforming to human engineering.

7. The protective trolley of claim 6, wherein: the fixing part comprises two fixing rods (83) hinged to the protection plate (81), a buffer device is connected between the fixing rods (83) and the protection plate (81), the rotating axis of the fixing rods (83) is horizontally arranged, and a space for the head of the refuge to pass through is reserved between the two fixing rods (83).

8. The protective trolley of claim 7, wherein: the fixed rod (83) is connected with the protection plate (81) through a hydraulic hinge (84).

9. The protective trolley of claim 1, wherein: two groups of emergency refuge assemblies (8) are respectively positioned at two ends of the rockfall buffer assembly (4).

10. The protective trolley of claim 1, wherein: the spraying assembly (7) comprises a rail trolley (72) connected to the arch frame (23) in a sliding mode and a spraying hose (71) fixedly arranged on the rail trolley (72), and the spraying hose (71) is arranged towards the protective net (2).