Downhole draw shaft car stop

Abstract

The utility model belongs to the technical field of mining industry, and relates to manufacturing of a prefabricated structure of an underground draw shaft bumper post and a matched installation mode, in particular to an underground draw shaft bumper post which comprises a plurality of bumper post steel members. The car stop steel member comprises a car stop steel structure box body, and an anchor rod grouting hole is further formed in the top face of the car stop steel structure box body. The filling space is filled with concrete, and an anchor rod hole is reserved in the cylindrical space corresponding to the anchor rod grouting hole; and one end of the anchor rod penetrates through the anchor rod grouting hole and the anchor rod hole and then extends outwards, and the part, extending outwards, of the anchor rod is embedded in the bottom bed rock of the side wall of the draw shaft during use. According to the technical scheme, the steel structure concrete prefabricated module is manufactured on the ground surface in advance in a modular mode, and the draw shaft car bumper is conveniently and rapidly formed and repaired.

Description

Technical Field

[0001] The utility model belongs to the technical field of mining, relates to the production of a prefabricated structure for an underground chute vehicle stop and a corresponding installation method, and specifically relates to an underground chute vehicle stop. Background Art

[0002] To transport ore from underground mines to the surface, it must be shoveled and loaded into the mine site by scrapers and transported to the chute. From there, it is transported by rail locomotives and hoisted to the surface by a surface winch. During this transportation process, the chute plays a crucial role as the ore conveyor.

[0003] According to the "Safety Regulations for Metal and Non-metal Mines," chutes must be equipped with comprehensive safety devices before use, including safe and reliable car stops. Car stops are typically manufactured in several different forms, depending on the materials used, including steel, cast concrete, and reinforced concrete. Cast concrete car stops are the most common permanent chute car stops in underground mines. Fully steel car stops are often used as temporary transitional structures due to their limited strength, susceptibility to damage, and frequent repairs.

[0004] The main structural form of reinforced concrete stoppers currently in use is to drill holes of uniform depth into the rock at regular intervals along the edge of the chute, based on the shape of the chute opening. Round steel bars are then inserted into the holes. The steel bars are then welded together to form a single structure. A formwork is then erected around the inserted steel bars, and concrete is poured inside according to the designed stopper dimensions. After a period of curing, the stoppers are constructed. Stoppers primarily protect shovel-loaders in underground mines during descent, preventing them from entering the chute.

[0005] However, the existing reinforced concrete car stops have the following problems: it takes a long time for concrete car stops to be made and put into use; the strength of the concrete poured on site underground is affected by the working environment and is difficult to ensure; the shoveling equipment will inevitably collide with the car stops during the chute mining process, and long-term use and collisions can easily cause the car stops to be damaged, which is difficult to repair after damage, the local repair strength is insufficient, and the removal and repair time is long; there are cases where the repair of car stops is delayed due to production impacts, which not only affects the normal use of the chute, but also brings safety risks. Utility Model Content

[0006] The present application provides an underground chute car stop, which uses a modular approach to prefabricate steel-structured concrete prefabricated modules on the surface, facilitating rapid formation and repair of the chute car stop.

[0007] In order to achieve the above technical objectives, the technical solution adopted by the present application is an underground chute car stopper, which includes a plurality of car stopper steel components;

[0008] The vehicle stop steel member includes a vehicle stop steel structure box body, and the vehicle stop steel structure box body has a top surface, a front side surface, a rear side surface, a left side surface, and a right side surface; the front side surface, the rear side surface, the left side surface, and the right side surface are arranged around the top surface and together with the top surface form a filling space; at the same time, the top surface is also provided with an anchor grouting hole;

[0009] Concrete is filled in the filling space, and an anchor hole is left in the cylindrical space corresponding to the anchor grouting hole, that is, the anchor hole and the anchor grouting hole are located on the same axis, and the diameter of the anchor grouting hole is larger than the diameter of the anchor hole;

[0010] An anchor rod, one end of the anchor rod extends outward after passing through the anchor rod grouting hole and the anchor rod hole, and the outward extending part of the anchor rod is buried in the bottom bedrock of the side wall of the chute when in use.

[0011] As an improved technical solution of the present application, it further includes internal reinforcing ribs, which are arranged in the filling space to divide the filling space into multiple concrete filling spaces.

[0012] As an improved technical solution of the present application, there are two or more wheel stop steel components; when in use, any two adjacent wheel stop steel components are fixed by welding.

[0013] As an improved technical solution of the present application, the surface of the anchor rod is threaded.

[0014] As an improved technical solution of the present application, the surface of the anchor rod has a roughness of N10 or above.

[0015] Beneficial effects

[0016] The underground chute car stop of this application uses a modular approach to prefabricate steel-concrete modules on the surface. When needed, materials are lowered and assembled on-site according to the site dimensions, facilitating the rapid formation and repair of the chute car stop. This addresses the current problems of long production and forming cycles for chute car stops, insufficient strength, and easy damage, as well as difficulties in repair. The increased strength of the steel-concrete structure extends its service life to a certain extent. Due to its quick replacement characteristics, it can be repaired in a short time after damage, reducing the safety risks of car stop production and improving the efficiency of car stop replacement after damage.

[0017] In summary, compared with traditional methods, the technical solution of this application significantly shortens the time from production to use of the chute car stop by using prefabricated parts. The stop can be put into use immediately after production, without waiting for concrete curing and solidification. Furthermore, due to the use of a steel-concrete combination, the overall strength is higher, the impact and collision resistance is enhanced, the service life is longer, and repair is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A front view of an underground chute stopper according to the present application is shown;

[0019] Figure 2 A top view of an underground chute stopper according to the present application is shown;

[0020] Figure 3 A side view of an underground chute stopper according to the present application is shown;

[0021] Figure 4 A front view of an underground chute stopper of the present application in use is shown;

[0022] Figure 5 A top view of an underground chute stopper of the present application in use is shown;

[0023] Figure 6 A side view of an underground chute stopper of the present application in use is shown;

[0024] In the figure, 1. Anchor hole; 2. Concrete; 3. Car stop steel structure box; 4. Internal reinforcing ribs; 5. Grouting concrete; 6. Anchor; 7. Steel wedge; 8. Anchor hole; 9. Top connecting steel plate; 10. Side connecting steel plate. DETAILED DESCRIPTION

[0025] like Figure 1-6 As shown, an underground chute car stop can be quickly manufactured and formed, shortening the time for operations near the air and the edge, and improving the efficiency of damage repair; it includes multiple car stop steel components.

[0026] The vehicle stop steel structure includes a vehicle stop steel structure box 3, which has a top surface, a front side surface, a rear side surface, a left side surface and a right side surface; the front side surface, the rear side surface, the left side surface and the right side surface are arranged around the top surface and together with the top surface form a filling space.

[0027] The top surface of the gearbox steel structure 3 is also provided with anchor grouting holes.

[0028] Concrete is filled in the filling space, and an anchor hole 1 is left in the cylindrical space corresponding to the anchor grouting hole, that is, the anchor hole 1 and the anchor grouting hole are located on the same axis, and the diameter of the anchor grouting hole is larger than the diameter of the anchor hole 1.

[0029] The vehicle stop steel structure includes an anchor rod 6, one end of which extends outward after passing through the anchor rod grouting hole and the anchor rod hole 1. The outwardly extending portion of the anchor rod 6 is buried in the bottom bedrock of the side wall of the chute when in use.

[0030] As an improved technical solution of the present application, it further includes internal reinforcing ribs 4, which are arranged in the filling space to divide the filling space into multiple concrete filling spaces.

[0031] As an improved technical solution of this application, there are two or more steel members of the vehicle stop; when in use, any two adjacent steel members of the vehicle stop are fixed by welding. The welding can be done directly, or after laying a top connecting steel plate 9 on the top surface and welding, and / or after installing a lateral connecting steel plate 10 on the side and welding.

[0032] As an improved technical solution of the present application, the surface of the anchor rod 6 is threaded.

[0033] As an improved technical solution of the present application, the surface of the anchor rod 6 has a roughness (above N10 level) with obvious visible surface bumps.

[0034] The underground chute car stop of this application mainly includes a car stop steel structure box 3, a concrete bonding part and an on-site production method.

[0035] 1. Determine the required strength of the vehicle block based on the type of vehicle it protects, and thus determine the type of steel plate required for the block's steel structure box 3. Specifically, the block's steel structure box 3 comprises a top, front, rear, left, and right sides. The front, rear, left, and right sides surround the top and, together with the top, form a fill space. The block's steel structure box 3 is entirely constructed of steel plate, forming a rectangular box with a hollowed-out bottom. The top and four side surfaces of the block's steel structure box 3 are all constructed of steel plate; the bottom is not enclosed with steel plate to reserve space for cement mortar to compact the block's contact surface with the bedrock during subsequent anchor grouting, creating a single, integrated structure. The top steel plate is fabricated as the final step in the underground chute block's fabrication process. Circular holes are cut into the top steel plate at regular intervals (determined by the spacing of the reserved anchor grouting holes). These circular holes serve as anchor grouting holes for subsequent on-site block installation.

[0036] Internal reinforcement steel plates, known as internal reinforcing ribs 4, are placed within the fill space to divide it into multiple concrete-filled spaces, essentially dividing the rectangular box into several smaller sections to improve overall strength. The length of the underground chute stop and the spacing between the internal reinforcing ribs 4 are adjustable based on the parameters of the intended location and are pre-measured.

[0037] The steel plate selection is divided into two parts: one for the external frame and the other for the internal reinforcement ribs 4. Both parts can be made of the same type or different types depending on the strength of the bumper. Once the steel plate material is determined, the bumper steel box 3 can be fabricated using welding (full weld). The specific dimensions of the bumper steel box 3 should be determined based on the desired size of the bumper to be manufactured on site; there is no fixed size requirement.

[0038] 2. Use C20 or higher grade concrete to pour into the rectangular box (filling space). During pouring, use PVC pipes to reserve anchor holes 8 in the separated small boxes for subsequent on-site installation. The spacing and size of the anchor holes 8 are determined based on the anchor 6 layout parameters designed for the vehicle stop's use site and can be adjusted before pouring concrete. After pouring and curing, the top steel plate can be welded closed.

[0039] 3. When making the car stop, multiple concrete car stop steel components (car stop steel components filled with concrete) are used for on-site splicing and assembly. Generally, two or more car stop steel components are required. During on-site installation, the tunnel floor at the installation site must be cleaned to the bedrock (no loose stones or the like on the upper part). Anchor holes 8 are constructed according to the designed anchor parameters. Then, the bottom wedge anchor is inserted from the anchor hole 8. A sledgehammer is used to expand the bottom of the anchor to tightly fix it in the anchor hole 8. The top surface of the concrete car stop steel component is transported to the site, suspended using a lifting device, and the anchor grouting hole is aligned with the installed anchor. After stable installation, cement mortar (grouting concrete 5) is poured on the top to form the anchor 6 and the car stop steel component into a whole.

[0040] 4. Multiple steel stop members are connected by welding using additional steel plates (top connecting steel plate 9 and / or lateral connecting steel plates 10) to form a single unit. Concrete 2 is poured into the gaps between the steel stop members to strengthen the joints, ultimately forming a usable, safe stop. Specifically, when two or more concrete stop steel members are used to form a stop, the concrete stop steel members are welded together using steel plates. The steel plate connection surfaces are the top, front, and rear sides of the concrete stop steel members, and the gaps between the joints are filled with concrete.

[0041] In the above process, the concrete is ordinary mixed concrete, which is mixed by the ground itself (if there is a high strength requirement, commercial concrete can be used or steel bars can be added in the box), and poured into the steel structure of the car stop. During the pouring process, an oscillating rod needs to be used to oscillate and compact it, and then it is cured.

[0042] Among them, the car stop is installed and fixed on site using a bottom wedge anchor rod. During installation, it is necessary to ensure that the bottom is expanded and fixed. Finally, the concrete steel structure car stop is connected to the bottom bedrock by grouting to form a car stop that can effectively protect the vehicle. In order to increase the integrity and strength of the connection between the anchor rod 6 and the cement mortar, the upper part of the anchor rod can be processed with threads or surface roughening to increase the contact surface so as to increase the friction against the impact of the vehicle. Specifically: the installation adopts the method of hammering into the bottom opening of the anchor rod 6 (existing structure). During installation, the steel wedge 7 will first be inserted into the cut seam at the bottom of the anchor rod 6 and sent into the anchor rod hole 8. After the anchor rod 6 penetrates into the bottom of the anchor rod hole 8, the anchor rod is hit by hammering, so that the steel wedge 7 further penetrates into the cut seam at the bottom of the anchor rod 6, thereby causing the bottom opening of the anchor rod 6 to expand, increasing the friction with the hole wall and achieving the effect of anchoring.

[0043] In summary, a modular approach allows for the prefabrication of steel-concrete modules (concrete stop steel components) on the surface. Materials can be lowered and assembled on-site as needed based on site dimensions. This facilitates the rapid formation and repair of chute stoppers, resolving current issues such as long production and forming times, insufficient strength, and susceptibility to damage, as well as difficulties in repair. The increased strength of steel-concrete structures extends their service life to a certain extent, and due to their rapid replacement capabilities, damage can be repaired quickly, reducing safety risks in stopper production and improving the efficiency of stopper replacement.

Claims

1. An underground chute car stop, characterized by: The invention comprises a plurality of steel members for the vehicle stop; the steel members for the vehicle stop include a steel structure box body for the vehicle stop; the steel structure box body for the vehicle stop has a top surface, a front side surface, a rear side surface, a left side surface and a right side surface; the front side surface, the rear side surface, the left side surface and the right side surface are arranged around the top surface and together with the top surface form a filling space; at the same time, the top surface is also provided with an anchor grouting hole; Concrete is filled in the filling space, and an anchor hole is left in the cylindrical space corresponding to the anchor grouting hole, that is, the anchor hole and the anchor grouting hole are located on the same axis, and the diameter of the anchor grouting hole is larger than the diameter of the anchor hole; An anchor rod, one end of the anchor rod extends outward after passing through the anchor rod grouting hole and the anchor rod hole, and the outward extending part of the anchor rod is buried in the bottom bedrock of the side wall of the chute when in use.

2. The underground chute vehicle stop according to claim 1, characterized in that: The invention also includes an internal reinforcing rib plate, which is arranged in the filling space to divide the filling space into a plurality of concrete filling spaces.

3. The underground chute vehicle stopper according to claim 1, characterized in that: There are two or more vehicle stop steel components; when in use, any two adjacent vehicle stop steel components are fixed by welding.

4. The underground chute vehicle stop according to claim 1, characterized in that: The surface of the anchor rod is provided with threads.

5. The underground chute vehicle stop according to claim 1, characterized in that: The surface of the anchor rod has a roughness of N10 or above.

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