Support retaining wall for extremely fractured rock mass of surface mine slope
By using a support method combining transverse anchor rods and vertical drill rods on the slope of open-pit mines, combined with concrete block filling and steel cage casting, the stability problem of extremely broken rock mass slopes is solved, and a low-cost and efficient retaining wall support effect is achieved.
Patent Information
- Application Number
- CN202422046901.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-08-21
AI Technical Summary
The traditional open-pit mine slope support method cannot provide sufficient support stress on extremely broken rock mass, resulting in poor stability between the retaining wall and the rock mass, and high later maintenance costs.
The support method of combining transverse anchor rods and vertical drill rods is adopted, concrete block filling and concrete reinforced cage casting body are used, and the foundation layer construction and anchor cable pulling are combined to form a stable retaining wall structure.
It improves the stability of the extremely broken rock mass slope, reduces the cost of later maintenance, and enhances the overall stability and safety of the retaining wall.
Smart Images
Figure CN223119083U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mine slope support, and more specifically to a retaining wall for supporting extremely broken rock masses on the slopes of open-pit mines. Background Technique
[0002] During the process of open-pit mining in mines, it is necessary to carry out protection work on the slopes generated during the mining process. Traditional open-pit slope support generally adopts methods such as anchor rods, shotcrete, shotcrete anchor nets, and slope cutting and load reduction, that is, installing frames or support nets on the surface of the slope, and then directly nailing these frames or support nets to the mountainside through anchor rods. However, when encountering slopes of extremely broken rock masses, traditional support methods cannot provide large support stresses. Pouring a concrete retaining wall can solve this problem, but after the concrete retaining wall is directly poured, the stability between the retaining wall and the slope of the extremely broken rock mass is poor, and there are still problems such as cracks in the retaining wall and separation between the retaining wall and the slope in the later stage, increasing the cost of maintaining the slope retaining wall in the later stage. Content of the Utility Model
[0003] The purpose of the utility model is: to solve the above technical problems, the utility model provides a retaining wall for supporting extremely broken rock masses on the slopes of open-pit mines, which can effectively improve the stability of the slopes of extremely broken rock masses, and has a simple construction process, reducing the maintenance cost of open-pit slopes in the later stage.
[0004] The utility model specifically adopts the following technical solutions to achieve the above purpose: A retaining wall for supporting extremely broken rock masses on the slopes of open-pit mines, including a rock mass, a transportation road is arranged on the upper end surface of the rock mass, a plurality of horizontal anchor rods are inserted into the slope of the rock mass, one ends of the plurality of horizontal anchor rods located outside the rock mass are fixedly connected with a plurality of vertical drill rods, a concrete block filler is filled between the plurality of vertical drill rods and the slope of the rock mass, a concrete steel cage casting is arranged outside the concrete block filler, and the plurality of vertical drill rods are located inside the concrete steel cage casting.
[0005] In order to fix the position of the retaining wall casting, as a preferred embodiment of the retaining wall for supporting extremely broken rock masses on the slopes of open-pit mines of the utility model, the lower ends of the plurality of vertical drill rods are fixedly inserted into the rock mass.
[0006] In order to improve the driving safety of the transportation road, as a preferred embodiment of the retaining wall for supporting extremely broken rock masses on the slopes of open-pit mines of the utility model, a concrete vehicle stop is fixedly arranged on the upper end surface of the concrete steel cage casting, and the concrete vehicle stop is located outside the transportation road.
[0007] In order to improve the stability of the anchor rods and vertical rods, as a preferred embodiment of the retaining wall for supporting extremely broken rock masses on the slopes of open-pit mines of the utility model, the lengths of the horizontal anchor rods and vertical drill rods located inside the rock mass are both greater than 2m.
[0008] In order to reduce costs while increasing the strength of the retaining wall, as an optimization for the retaining wall for supporting extremely fragmented rock masses on the slopes of open-pit mines in the present utility model, ordinary Portland cement is used for the concrete of the concrete steel cage casting body.
[0009] For, as an optimization for the retaining wall for supporting extremely fragmented rock masses on the slopes of open-pit mines in the present utility model, the slope angle of the masonry slope of the concrete steel cage casting body is 75°.
[0010] The beneficial effects of the present utility model are as follows: The slope retaining wall combines horizontal anchor rods and vertical drill rods to stabilize the outermost concrete steel cage casting body; by filling concrete filling blocks, it can effectively block the extremely fragmented rocks on the slope; the overall retaining wall improves the stability of the slope retaining wall in the weathered and fragmented layer section of the open-pit mine development road and reduces the subsequent slope maintenance by carrying out the construction of the foundation layer, pouring the main body of the slope protection, tensioning the side anchor cables, and building the upper vehicle retaining wall, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 is a schematic cross-sectional view of the present utility model;
[0012] Figure 2 is a schematic view of part A of the present utility model;
[0013] Figure 3 is a schematic side view of the vertical drill rod and the concrete steel cage casting body of the present utility model.
[0014] Reference numerals: 1, rock mass; 101, transportation road; 2, horizontal anchor rod; 3, concrete block filler; 4, vertical drill rod; 5, concrete steel cage casting body; 501, concrete vehicle retaining wall. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] The present utility model will be described in detail below in conjunction with the drawings and specific embodiments. Here, the schematic embodiments of the present utility model and the description are used to explain the present utility model, but do not limit the present utility model.
[0016] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.
[0017] Please refer to Figures 1 - 3, the present utility model provides the following technical solutions: An extremely broken rock mass support retaining wall for an open-pit mine slope, including a rock mass 1, on the upper end surface of the rock mass 1 there is a transportation road 101, and a plurality of horizontal anchor rods 2 are inserted into the slope of the rock mass 1. One end of the plurality of horizontal anchor rods 2 located outside the rock mass 1 is fixedly connected to a plurality of vertical drill rods 4. The lower ends of the plurality of vertical drill rods 4 are fixedly inserted into the rock mass 1. Between the plurality of vertical drill rods 4 and the slope of the rock mass 1, there is filled with a concrete block filler 3. Outside the concrete block filler 3, there is a concrete steel cage casting 5. The plurality of vertical drill rods 4 are located inside the concrete steel cage casting 5. On the upper end surface of the concrete steel cage casting 5, there is fixedly provided a concrete vehicle stop 501, and the concrete vehicle stop 501 is located outside the transportation road 101.
[0018] In this embodiment: The lengths of the horizontal anchor rod 2 and the vertical drill rod 4 located inside the rock mass 1 are both greater than 2m. The concrete of the concrete steel cage casting 5 uses ordinary Portland cement, and the slope angle of the concrete steel cage casting 5 is 75°; The overall retaining wall improves the stability of the slope retaining wall in the weathered and broken layer section of the open-pit mine development road by carrying out the construction of the foundation layer, the pouring of the slope protection main body, the cable anchor towing on the side, and the construction of the upper vehicle stop.
[0019] The construction process of the present utility model:
[0020] (1) First, fix the anchor rods on the extremely broken rock mass slope. The horizontal anchor rod 2 is 3.5m long, the angle is perpendicular to the rock mass slope surface, and the distance between two adjacent horizontal anchor rods 2 is 2m;
[0021] (2) Fix the drill rods. The length of the part where the lower ends of the plurality of vertical drill rods 4 are inserted into the rock mass is greater than 2m;
[0022] (3) Place the steel cage outside the plurality of vertical drill rods;
[0023] (4) Grout the steel cage. The designed strength grade of the grouting concrete is not lower than C20, the compressive strength at 1d age is not lower than 5Mpa, use 32.5 Portland cement or ordinary Portland cement, and the cement dosage is required to be not less than 400kg / m3;
[0024] (5) The horizontal anchor rod 2 and the vertical drill rod 4 should have an outer extension of more than 50mm and be connected by welding, and be bonded with the grouting concrete to form an integral body to ensure the stability of the slope;
[0025] (6) Ensure that the slope angle is 75°, and the grouting retaining wall should be poured as required;
[0026] (7) The height of the support retaining wall is the same as the slope height, and the support retaining wall is 0.7m higher than the slope, which is used as a road vehicle stop.
[0027] The above has introduced in detail the technical solutions provided by the embodiments of the present utility model. Specific examples are used herein to elaborate on the principles and implementation manners of the embodiments of the present utility model. The descriptions of the above embodiments are only applicable to helping understand the principles of the embodiments of the present utility model. At the same time, for those of ordinary skill in the art, according to the embodiments of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present utility model.
Claims
1. A support retaining wall for extremely fragmented rock masses on the slope of an open-pit mine, comprising a rock mass (1), wherein a transportation road (101) is arranged on the upper end surface of the rock mass (1), and it is characterized in that: A plurality of horizontal anchor rods (2) are inserted into the slope of the rock mass (1). One ends of the plurality of horizontal anchor rods (2) located outside the rock mass (1) are fixedly connected with a plurality of vertical drill pipes (4). A concrete block filler (3) is filled between the plurality of vertical drill pipes (4) and the slope of the rock mass (1). A concrete steel cage casting (5) is arranged outside the concrete block filler (3). The plurality of vertical drill pipes (4) are located inside the concrete steel cage casting (5).
2. The retaining wall for supporting extremely fragmented rock mass on the slope of an open-pit mine according to claim 1, wherein: The lower ends of the plurality of vertical drill pipes (4) are fixedly inserted into the rock mass (1).
3. The retaining wall for supporting extremely fragmented rock mass on the slope of an open-pit mine according to claim 1, characterized in that: A concrete vehicle stop (501) is fixedly arranged on the upper end surface of the concrete steel cage casting (5). The concrete vehicle stop (501) is located outside the transportation road (101).
4. A support retaining wall for extremely fractured rock mass on the slope of an open-pit mine according to claim 1, characterized in that: The lengths of the horizontal anchor rods (2) and the vertical drill pipes (4) located inside the rock mass (1) are both greater than 2m.
5. The retaining wall for supporting extremely fragmented rock mass on the slope of an open-pit mine according to claim 1, characterized in that: The concrete of the concrete steel cage casting (5) uses ordinary Portland cement.