Steel structure for preventing floor heave in underground roadway of metal mine

Abstract

The utility model discloses a kind of metal mine underground roadway supporting anti bottom drum steel structures, belong to metal mine supporting technical field.Solve the existing arch frame prone to bottom drum, affect normal production of mine and easily cause the problem of hidden danger.The utility model includes top arc U-shaped steel, arc U-shaped steel both sides are connected with one vertical U-shaped steel, vertical U-shaped steel lower end is connected with horizontal steel, and closed loop steel arch structure is formed with vertical U-shaped steel;The horizontal steel has two, and there is pull rod in the clearance between two horizontal steel connections, the pull rod is horizontally placed on ground, and it is perpendicular to horizontal steel in overhead view, and adjacent above-mentioned closed loop steel arch structure is connected by pull rod.Connect multiple closed loop steel arches by pull rod, enhance the stability of overall roadway support.

Description

Technical Field

[0001] This utility model belongs to the field of metal mine support technology, specifically relating to a steel structure for preventing floor heave in underground roadways of metal mines. Background Technology

[0002] In underground roadway support operations in metal mines, traditional steel arch frames struggle to meet the high-intensity pressure requirements in both vertical and horizontal directions due to the complex stresses experienced in the roadways, making them particularly prone to floor heave. Floor heave not only leads to roadway deformation and damage, affecting normal mine production, but also poses significant safety hazards, threatening the lives of underground workers and the safety of equipment. Utility Model Content

[0003] The purpose of this utility model is to provide a steel structure for supporting and preventing floor heave in underground roadways of metal mines, so as to solve the problem that traditional steel arch frames cannot effectively cope with the complex stress of roadways and are prone to floor heave.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A steel structure for supporting and preventing floor heave in underground roadways of metal mines includes a top arc-shaped U-shaped steel, with a vertical U-shaped steel connected to each side of the arc-shaped U-shaped steel. The upper end of the vertical U-shaped steel is an arc portion that matches the arc portion of the arc-shaped U-shaped steel. The lower end of the vertical U-shaped steel is connected to a horizontal steel, forming a closed-loop steel arch frame structure with the vertical U-shaped steel.

[0005] Furthermore, there are two horizontal steel beams, one on the left and one on the right, and a tie rod is connected between the two horizontal steel beams. The tie rod is placed horizontally on the ground and is perpendicular to the horizontal steel beam when viewed from above. Adjacent closed-loop steel arch frame structures are connected by the tie rod.

[0006] Furthermore, the horizontal steel is an I-beam with arc-shaped notches at both ends, and the vertical U-shaped steel has an arc-shaped notch at the bottom, which matches the arc-shaped notches at both ends of the horizontal steel.

[0007] Furthermore, a connector is provided between the curved U-shaped steel and the vertical U-shaped steel.

[0008] The beneficial effects of this utility model are as follows: the top arc-shaped U-shaped steel is bolted to the vertical U-shaped steel, transferring the pressure at the top of the roadway to the vertical U-shaped steel, thus ensuring the roadway's vertical compressive strength; the welded connection between the vertical U-shaped steel and the horizontal steel forms a closed-loop steel arch structure, resisting horizontal pressure and preventing floor heave; adjacent closed-loop steel arch structures are connected by tie rods, further connecting multiple closed-loop steel arch structures, thereby enhancing the stability of the entire roadway support and improving the safety and production efficiency of underground operations in metal mines. Attached Figure Description

[0009] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the horizontal steel structure in this utility model.

[0010] In the diagram, 1-horizontal steel; 2-arc U-shaped steel; 3-vertical U-shaped steel; 4-pull rod. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0012] like Figures 1 to 2 As shown, a steel structure for supporting and preventing floor heave in an underground roadway of a metal mine includes a top arc-shaped U-shaped steel 2. A vertical U-shaped steel 3 is connected to each side of the arc-shaped U-shaped steel 2 via connectors 5. The upper end of the vertical U-shaped steel 3 is arc-shaped, matching the arc of the arc-shaped U-shaped steel 2. The connectors 5 are high-strength bolt sets, forming a support on both sides. This transfers the vertical pressure from the roadway top to the vertical U-shaped steels 3 on both sides, ensuring the vertical compressive strength. A horizontal steel 1, an I25 type I-beam, is connected to the lower end of the vertical U-shaped steel 3. The I-beam has arc-shaped cuts at both ends, and the vertical U-shaped steel 3 also has arc-shaped cuts at its lower end. The I-beams and vertical U-shaped steel 3 are connected by electric welding to form a closed-loop steel arch structure. This closed-loop steel arch structure ensures the horizontal compressive strength of the roadway and prevents the floor from bulging. There are two horizontal steel 1s, one on the left and one on the right, and a tie rod 4 is connected in the gap between the two horizontal steel 1s. The tie rod 4 is made of hot-rolled round steel with a diameter of φ20mm and a length of L=1155mm. The tie rod 4 is placed horizontally on the ground and fixed between the two horizontal steel 1s by bolts. The tie rod 4 is perpendicular to the horizontal steel 1 when viewed from above. The tie rod 4 can connect two adjacent closed-loop steel arches, and then connect multiple closed-loop steel arches in sequence to form a stable support for the entire roadway.

Claims

1. A steel structure for supporting and preventing floor heave in underground roadways of metal mines, characterized in that, It includes a top arc-shaped U-shaped steel (2), and a vertical U-shaped steel (3) is connected to each side of the arc-shaped U-shaped steel (2). The upper end of the vertical U-shaped steel (3) is an arc, which is adapted to the arc of the arc-shaped U-shaped steel (2). The lower end of the vertical U-shaped steel (3) is connected to a horizontal steel (1), forming a closed-loop steel arch frame structure with the vertical U-shaped steel (3). There are two horizontal steels (1) on the left and right, and a tie rod (4) is connected in the gap between the two horizontal steels (1). The tie rod (4) is placed horizontally on the ground and is perpendicular to the horizontal steel (1) when viewed from above. The adjacent closed-loop steel arch frame structures are connected by the tie rod (4).

2. The steel structure for supporting and preventing floor heave in underground roadways of a metal mine according to claim 1, characterized in that, The horizontal steel (1) is an I-beam with arc-shaped notches at both ends. The vertical U-shaped steel (3) has an arc-shaped notch at the bottom, which matches the arc-shaped notches at both ends of the horizontal steel (1).

3. The steel structure for supporting and preventing floor heave in underground roadways of a metal mine according to claim 1, characterized in that, A connector (5) is provided between the arc-shaped U-shaped steel (2) and the vertical U-shaped steel (3).

Images