Wellhead bumper assembly for large-diameter raise-boring construction

Abstract

The utility model belongs to the technical field of safety of mine raise-boring construction, and particularly relates to a wellhead bumper assembly for large-diameter raise-boring construction, which comprises a concrete terrace in the shape of a cuboid, and the center point of the concrete terrace coincides with a raise-boring circle center point and a raise boring point; the distance between the concrete car stop and the boundary of a well completion shaft formed by the raise boring is not smaller than 10 cm and not larger than 20 cm; and one end of the anchor rod penetrates through the concrete terrace and then enters the bed rock of the raise boring or is fixed in the side wall of the roadway, and the other end of the anchor rod is buried in the concrete bumper post. The assembly is safe and reliable, and the process is simple.

Description

Technical Field

[0001] This utility model belongs to the field of mine shaft raising construction safety technology, specifically relating to a shaft head stop assembly for large-diameter shaft raising construction. Background Technology

[0002] Thanks to the continuous advancement and development of mining machinery, the equipment and processes for raising shafts and ore passes have become increasingly mature. Due to their safety and efficiency, more and more mines are choosing to use raising shaft trolleys for underground raising shaft and ore pass construction. For safety reasons and in accordance with the "Safety Regulations for Metal and Non-metal Mines," after the raising shaft and ore pass are completed, safety protection facilities such as reliable permanent safety stops must be constructed before use to ensure the safety of personnel and equipment during operation. Currently, the construction of safety stops for raising shafts and ore passes after the raising shaft completion is a separate, interconnected process.

[0003] Whether installing permanent safety barriers at the wellhead is done by filling it in or by sealing it off (isolating it), the first step in construction is to implement temporary safety measures. During this process, workers inevitably have to work close to the wellhead, near the edge or at a height, posing a risk of falls. Although this can be mitigated by wearing safety belts and securing safety ropes, the safety risk remains, posing a significant operational safety hazard. Furthermore, the subsequent filling in of the well, removal of temporary safety facilities, and the final installation of permanent safety barriers require substantial manpower and resources for organization and implementation.

[0004] The current traditional construction of permanent safety barriers at wellheads involves high-altitude work safety risks due to its characteristics of working near air and edge. Not only are the procedures complex and the risks to workers high, but it also requires a lot of manpower and resources to organize the construction, and the construction time is often very long and inefficient. Utility Model Content

[0005] This application provides a wellhead stop assembly for large-diameter raise shaft construction, which is safe, reliable, and simple to manufacture.

[0006] To achieve the above technical objectives, the technical solution adopted in this application is: a wellhead stop assembly for large-diameter raised well construction, comprising...

[0007] The concrete floor is rectangular in shape, and the center point of the concrete floor coincides with the center point of the well opening and the well hole opening point.

[0008] The concrete truck stop should be no less than 10cm and no more than 20cm away from the boundary of the well shaft formed by the reverse shaft.

[0009] An anchor bolt has one end that passes through the concrete floor and enters the bedrock of the reverse shaft or is fixed in the tunnel wall, while the other end is buried in the concrete wheel stop.

[0010] As an improved technical solution in this application, the minimum distance between any side of the concrete floor and the center of the well is greater than 50cm of the radius of the circular well after completion.

[0011] As an improved technical solution of this application, the concrete truck stop is a reinforced concrete structure with reinforcement on three sides: the top surface, the facing surface, and the back surface. The facing surface is defined as the side of the concrete truck stop that blocks the vehicle; the back surface is the side opposite to the facing surface and is also the side near the center of the well-forming circle.

[0012] As an improved technical solution of this application, the protective layer of the concrete truck stop is 5cm thick, the nominal diameter of the reinforcing bars is not less than 8mm, and the horizontal and vertical bars are arranged in a grid configuration with a grid parameter of 15*15cm.

[0013] As an improved technical solution of this application, the top surface, the front surface, and the back surface of the concrete truck stop are all covered with steel plates.

[0014] As an improved technical solution of this application, the anchor rod penetrates the bedrock at a depth of not less than 0.6m after passing through the concrete floor; it penetrates the concrete truck stop at a depth of not less than 30cm, and the maximum depth does not exceed the height of the concrete truck stop.

[0015] As an improved technical solution of this application, the anchor rod is arranged along the length of the concrete truck stop, and the interval between any two adjacent anchor rods is 30cm.

[0016] Beneficial effects

[0017] The wheel stop assembly of this application is integrally formed with the bottom bedrock and tunnel walls, avoiding the high-risk operations such as workers needing to work near the air or edge that are required for independent installation of wheel stops; at the same time, it does not require a lot of manpower and resources to prepare for high-altitude operation safety measures, which is both safe and shortens the well completion and use time. Attached Figure Description

[0018] Figure 1 Construction diagram of the wheel stop assembly in this application Figure 1 ;

[0019] Figure 2 Construction diagram of the wheel stop assembly in this application Figure 2 ;

[0020] Figure 3 This application presents a schematic diagram of the installation structure of the anchor rod in the wheel stop assembly;

[0021] Figure 4 A schematic diagram of the structure of the wheel stop assembly in this application;

[0022] Figure 5A top view of the wheel stop assembly of this application;

[0023] In the diagram, 1. Concrete floor; 2. Concrete truck stop; 3. Reinforcing steel; 4. Anchor bolt; 5. Raised well drilling rig; 6. I-beam assembly; 7. Crushed stone cushion layer. Detailed Implementation

[0024] like Figure 1-5 As shown, the vehicle stop of this application is combined with the foundation of the raised well construction site during construction. It is poured as a whole with the foundation required for the raised well construction operation before the construction of the raised well drilling rig 5.

[0025] Definition: Large diameter refers to a diameter greater than 2 meters.

[0026] The side facing the vehicle: the side that blocks the concrete truck.

[0027] The back face: the side opposite to the front face, and also the side near the center of the reverse well formation circle.

[0028] Detailed description is as follows: A wellhead stop assembly for large-diameter raised well construction, comprising...

[0029] Concrete floor 1 is rectangular in shape. The center point of concrete floor 1 coincides with the center point of the reverse well and the opening point of the reverse well. The minimum distance between any side of concrete floor 1 and the center of the reverse well is greater than 50cm of the radius of the circular well after completion.

[0030] The concrete truck stop 2 is located at a distance of not less than 10cm and not more than 20cm from the boundary of the shaft formed by the reverse shaft. The concrete truck stop is a reinforced concrete structure with reinforcement on three sides: the top surface, the facing surface, and the rear surface. The protective layer thickness of the concrete truck stop 2 is 5cm, and the nominal diameter of the reinforcing bars 3 is not less than 8mm, using a horizontal and vertical reinforcement arrangement with a grid parameter of 15*15cm. To improve the service life of the concrete truck stop 2, the top surface, the facing surface, and the rear surface are all covered with steel plates.

[0031] Anchor bolt 4 has one end penetrating through the concrete floor 1 and entering the bedrock of the reverse shaft well, or this end being fixed in the tunnel wall; the other end is embedded in the concrete truck stop 2. In practical applications, the portion of anchor bolt 4 penetrating through the concrete floor 1 and extending into the bedrock is no less than 0.6m; the portion extending into the concrete truck stop is no less than 30cm, and the maximum extension does not exceed the height of the concrete truck stop; the anchor bolt 4 is arranged along the length of the concrete truck stop, and the interval between any two adjacent anchor bolts 4 is 30cm.

[0032] The specific construction process is as follows:

[0033] 1. Determine the pouring parameters, such as the length, width, and height of the concrete foundation 1 required for the construction of the raise shaft, as well as the required concrete strength, based on the diameter of the raise shaft to be constructed and the external dimensions of the raise shaft equipment used on site.

[0034] The concrete floor 1 required for the construction of the raised shaft equipment has a coverage area determined by the diameter of the final circular well of the raised shaft. The concrete floor 1 is rectangular in shape, with its center point coinciding with the center point of the raised shaft and the opening point of the raised shaft. The minimum distance between any side of the concrete floor 1 and the center of the raised shaft should be at least 50cm greater than the radius of the circular well after completion, and the length and width of the concrete floor 1 are determined accordingly. The thickness of the concrete floor 1 should not be less than 30cm, and the concrete strength should meet at least the C25 standard. Except for the side of the vehicle stop, which is reinforced concrete, the rest is plain concrete.

[0035] The concrete truck stop 2 is located on the side connecting to the external roadway, facing the direction of equipment entry and exit. The length of the truck stop (concrete truck stop) is consistent with the width of the roadway in the direction requiring protection, the width of the truck stop is not less than 50cm, and the height of the truck stop must meet the requirement of not less than one-third of the diameter of the largest trackless equipment tire used on site, as stipulated in the "Safety Regulations for Metal and Non-metal Mines", and the height is not less than the height of the concrete floor 1.

[0036] 2. Based on the maximum tire height of the trackless equipment that needs protection after the well is formed, determine the height, thickness, and required concrete strength of the concrete truck stop. The length of the truck stop shall be based on the area that needs to be protected on site.

[0037] The concrete wheel chock is made of reinforced concrete with a protective layer thickness of 5 cm. The nominal diameter of the reinforced concrete is not less than 8 mm. It adopts a horizontal and vertical reinforcement arrangement with a grid parameter of 15*15 cm. The top, front, and rear surfaces are reinforced with reinforcement.

[0038] Among them, the part of the concrete truck stop that comes into contact with the floor slab and sidewalls of the roadway needs to be connected with anchor bolts 4 to strengthen the overall connection between the truck stop and the roadway, thereby enhancing its ability to resist vehicle impact.

[0039] Among them, the boundary of the shaft formed by the concrete truck stop and the reverse shaft should maintain a certain safe distance. The minimum distance between the truck stop and the edge of the shaft should not be less than 10cm (to prevent damage when the reverse shaft is finally completed) and not more than 20cm.

[0040] To protect the concrete truck stop, steel plates can be installed on its top, front, and back surfaces after pouring to increase its anti-collision capability during well-drilling operations and normal use, thus ensuring its service life.

[0041] 3. Based on the determined parameters, complete the integrated concrete pouring design for the construction foundation and safety stop. Mark the center point of the shaft opening on site, determine the pouring area for the concrete roadway floor slab according to the integrated concrete design, and clean it. Then, construct the formwork and anchor holes for the stop, fix the anchors, and tie the reinforcing bars. Finally, pour the concrete, using a vibrator to compact it during the pouring process to ensure the quality of the pouring.

[0042] Anchor bolt 4: One anchor bolt is installed every 30cm along the length of the car stop. At least two anchor bolts 4 are evenly distributed at the height of the car stop where they connect to the roadway sidewall. The anchor bolt 4 penetrates at least 0.6m into the bedrock and at least 30cm into the concrete, with a maximum penetration not exceeding the height of the car stop.

[0043] 4. After the concrete has cured for 28 days, the shaft raising equipment will be brought to the site. After the integrated concrete is poured, there will be a height difference between the concrete foundation and the roadway floor, and also between the truck stop and the foundation. The equipment will be leveled in two ways: the height difference between the foundation and the roadway will be leveled using readily available crushed stone (crushed stone pad 7); the height difference between the foundation and the truck stop will be leveled using a combination of multiple I-beams of different sizes forming a load-bearing plate. After the equipment is erected, the shaft raising operation will proceed according to the normal procedure. Finally, after the shaft raising operation is completed, the equipment will be removed, the I-beam combination 6 load-bearing plate will be dismantled, and the crushed stone pad 7 will be cleaned to form the concrete truck stop.

Claims

1. A wellhead stop assembly for large-diameter raised shaft construction, characterized in that, include The concrete floor is rectangular in shape, and the center point of the concrete floor coincides with the center point of the well opening and the well hole opening point. The concrete truck stop should be no less than 10cm and no more than 20cm away from the boundary of the well shaft formed by the reverse shaft. An anchor bolt has one end that passes through the concrete floor and enters the bedrock of the reverse shaft well, or that end is fixed in the tunnel wall, while the other end is buried in the concrete wheel stop.

2. The wellhead stop assembly for large-diameter raised shaft construction according to claim 1, characterized in that, The minimum distance between any side of the concrete floor and the center of the well is greater than 50cm from the radius of the circular well after completion.

3. A wellhead stop assembly for large-diameter raised shaft construction according to claim 1, characterized in that, The concrete truck stop is a reinforced concrete structure with reinforcement on three sides: the top surface, the facing surface, and the rear surface. The facing surface is defined as the side of the concrete truck stop that blocks the vehicle; the rear surface is the side opposite to the facing surface and is also the side closest to the center of the well.

4. A wellhead stop assembly for large-diameter raised shaft construction according to claim 1 or 3, characterized in that, The concrete wheel chock has a protective layer thickness of 5cm, and the nominal diameter of the reinforcing bars is not less than 8mm. It adopts a horizontal and vertical bar arrangement with a grid parameter of 15*15cm.

5. A wellhead stop assembly for large-diameter raised shaft construction according to claim 1, characterized in that, The top, front, and rear surfaces of the concrete truck stop are all covered with steel plates.

6. A wellhead stop assembly for large-diameter raised shaft construction according to claim 1, characterized in that, After the anchor bolt passes through the concrete floor, the portion extending into the bedrock shall be no less than 0.6m; the portion extending into the concrete curb shall be no less than 30cm, and the maximum extension shall not exceed the height of the curb.

7. A wellhead stop assembly for large-diameter raised shaft construction according to claim 1, characterized in that, The anchor rods are arranged along the length of the concrete truck stop, and the interval between any two adjacent anchor rods is 30cm.

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