Anchoring steel lining plate structure for mine shaft construction

Abstract

This utility model relates to the field of mining engineering construction technology, specifically to an anchored steel liner structure for mine shaft construction, solving the problems of time-consuming and labor-intensive straightening of existing curved steel liner anchor bars and unstable connections. This utility model places the curved steel liner in a pre-installation position, uses a handheld rock drill to construct anchor holes at corresponding positions in the bedrock of the shaft wall through pre-drilled anchoring countersinking holes, and places anchoring agent into the anchor holes. Then, threaded steel anchor rods are driven into the pre-drilled anchoring countersinking holes of the curved steel liner, passing through the curved steel liner and welded to the inner side with perforated round steel, and driven into the corresponding anchor holes in the bedrock of the shaft wall, thus creating an anchoring force between the threaded steel anchor rods and the surrounding rock of the shaft wall. Simultaneously, high-strength bolts are used to rigidly connect the threaded steel anchor rods to the curved steel liner through the pre-drilled holes, completing the installation of the curved steel liner. This utility model solves the problems of complex procedures and insufficient reliability of fixing methods in the installation of curved steel liners, saving time, labor, and effort, and improving the efficiency of curved steel liner installation.

Description

Technical Field

[0001] This utility model relates to the field of mining engineering construction technology, specifically to an anchoring steel liner structure for mine shaft construction. Background Technology

[0002] In underground mine ore chute support, a type of support system using cast-in-place concrete curved steel liners is commonly used. Before installation, anchor bars need to be installed on the convex side of the curved steel liner, cast into the concrete to increase the contact area between the liner and the concrete, preventing the liner from detaching during later use. However, during transportation, the anchor bars need to be flattened and pressed tightly against the liner. These anchor bars are typically made of φ12 threaded steel, requiring manual on-site bending to a vertical position. In practice, due to the confined working space, the installation of curved steel liners is time-consuming and labor-intensive. Furthermore, relying solely on anchor bars for fixation makes the liner prone to displacement or detachment in environments with high ground stress, leading to difficulties in replacement and maintenance. Therefore, increasing the bonding force between the curved steel liner and concrete, optimizing the liner structure, reducing labor intensity, and improving construction efficiency are challenging problems encountered during the installation of curved steel liners. Utility Model Content

[0003] This utility model provides an anchoring steel liner structure for mine shaft construction, which solves the problems of time-consuming and laborious straightening of existing curved steel liner anchor bars and unstable connection.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An anchoring steel liner structure for mine shaft construction includes an arc-shaped steel liner, characterized in that: a plurality of perforated round steel bars are fixedly provided on the convex side of the arc-shaped steel liner; pre-drilled anchoring holes are correspondingly provided on the concave side of the arc-shaped steel liner and the perforated round steel bars; threaded steel anchor rods are inserted into the through holes of the perforated round steel bars, and the threaded steel anchor rods extend to the convex side of the arc-shaped steel liner; the ends of the threaded steel anchor rods are detachably provided with high-strength bolts, and the high-strength bolts are located inside the pre-drilled anchoring holes.

[0006] Furthermore, the pre-drilled anchoring countersunk hole is formed by aligning two holes of different sizes. The larger hole is opened on the concave surface of the arc-shaped steel liner, and the smaller hole is opened on the convex surface of the arc-shaped steel liner. It is used to install and hide high-strength bolts. The smaller hole is used to restrict the movement of high-strength bolts and apply tightening force. The smaller hole corresponds to the perforated round steel.

[0007] Furthermore, the perforated round steel is welded to the convex surface of the arc-shaped steel liner to replace the anchor bar, thereby increasing the contact area between the arc-shaped steel liner and the concrete.

[0008] This invention has the following advantages: The operator places the arc-shaped steel liner in the pre-installation position, drills anchor holes in the corresponding positions of the well wall bedrock through pre-drilled anchoring holes, and places anchoring agent into the anchor holes. Then, the threaded steel anchor is driven into the corresponding anchor holes on the well wall bedrock through the pre-drilled anchoring holes in the arc-shaped steel liner, passes through the arc-shaped steel liner, and is welded to the inner side with a perforated round steel bar. After the threaded steel anchor is installed, a high-strength bolt is installed at the threaded end of the threaded steel anchor. The high-strength bolt interacts with the anchoring force and the tightening force on the arc-shaped steel liner to form prestress. Simultaneously, the high-strength bolt is welded to the inner wall of the pre-drilled anchoring holes, so that the well wall surrounding rock forms a rigid connection with the arc-shaped steel liner through the threaded steel anchor, completing the installation of the arc-shaped steel liner. This invention solves the problems of time-consuming and labor-intensive straightening of existing arc-shaped steel liner anchor bars and unstable connections, saving time, labor, and effort, and improving the efficiency of arc-shaped steel liner installation. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the concave structure of the arc-shaped steel liner of this utility model.

[0010] Figure 2 This is a schematic diagram of the convex structure of the arc-shaped steel liner of this utility model.

[0011] Figure 3 This is a schematic diagram of the overall structure of the threaded steel anchor rod of this utility model.

[0012] Figure 4 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 5 This is a schematic diagram of the installation of this utility model.

[0014] The meanings of the reference numerals in the attached figures are as follows:

[0015] 1. Curved steel liner; 2. Pre-drilled anchoring holes; 3. Perforated round steel bars; 4. Threaded steel anchor bolts; 5. High-strength bolts; 6. Well bedrock. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1-5 As shown, an anchoring steel liner structure for mine shaft construction includes an arc-shaped steel liner 1. The arc-shaped steel liner 1 has multiple perforated round steel bars 3 fixedly arranged on its convex side. Pre-drilled anchoring holes 2 are correspondingly provided on the concave side of the arc-shaped steel liner 1 and the perforated round steel bars 3. Threaded steel anchor rods 4 are inserted into the through holes of the perforated round steel bars 3, and the threaded steel anchor rods 4 extend to the convex side of the arc-shaped steel liner 1. High-strength bolts 5 are detachably provided at the ends of the threaded steel anchor rods 4, and the high-strength bolts 5 are located inside the pre-drilled anchoring holes 2.

[0018] In practical use, the present invention first places the arc-shaped steel liner 1 in the pre-installation position, and constructs anchor bolt holes at the corresponding positions of the well wall bedrock 6 through pre-drilled anchoring holes 2. Anchoring agent is then placed into the anchor bolt holes. Threaded steel anchor bolts 4 are then driven into the corresponding anchor bolt holes on the well wall bedrock 6 through the pre-drilled anchoring holes 2, passing through the welded perforated round steel 3 on the convex surface of the arc-shaped steel liner 1. After the threaded steel anchor bolts 4 are installed, high-strength bolts 5 are installed at the threaded ends of the threaded steel anchor bolts 4. The high-strength bolts 5 interact with the anchoring force and the tightening force on the arc-shaped steel liner 1 to form prestress. At the same time, the high-strength bolts 5 are fully welded to the inner wall of the pre-drilled anchoring holes 2, so that the well wall bedrock 6 forms a rigid connection with the arc-shaped steel liner 1 through the threaded steel anchor bolts 4, completing the installation of the arc-shaped steel liner 1, achieving the firmness of the installation, and improving the bonding strength between the steel liner 1 and the well wall bedrock 6.

Claims

1. An anchoring steel liner structure for mine shaft construction, comprising an arc-shaped steel liner (1), characterized in that: Multiple perforated round steel bars (3) are fixedly provided on the convex side of the arc-shaped steel liner (1). The concave side of the arc-shaped steel liner (1) and the perforated round steel bars (3) are matched and correspondingly provided with pre-drilled anchoring holes (2). Threaded steel anchor rods (4) are inserted into the through holes of the perforated round steel bars (3), and the threaded steel anchor rods (4) extend to the convex side of the arc-shaped steel liner (1). The ends of the threaded steel anchor rods (4) are detachably provided with high-strength bolts (5), and the high-strength bolts (5) are located inside the pre-drilled anchoring holes (2).

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