Underground roadway steel frame supporting structure

Abstract

The utility model discloses an underground roadway steel frame supporting structure. The underground roadway steel frame supporting structure comprises column legs arranged on the sections of all roadways. The column legs are symmetrically arranged at the boundary positions of roadway side walls and a roadway top plate. The mining U-shaped steel is welded on the column legs; the roadway top supporting frame is mounted on the mining U-shaped steel on the two sides of the roadway; the roadway top supporting frame is connected with a roadway top plate in a supporting mode. The structure is simple, and the vault support is arranged on the interface of the roadway side wall and the roadway top plate, so that the roadway top metal bracket support meeting the use requirement can be mounted without cleaning a loose soft body of a roadway bottom plate, removing wind, water and electricity pipelines on the roadway side wall and reducing the expanding and brushing area of an old roadway while the support reliability is ensured; supporting efficiency is improved, and workload is reduced.

Description

Technical Field

[0001] This application relates to the technical field of underground roadway support, and particularly to a steel frame support structure for underground roadways. Background Art

[0002] The existing underground metal support structure includes two parts: column legs on both sides and an arch top. Before installing the metal support, it is necessary to clean the roadway floor to the bottom solid, remove the water, wind, and electricity pipelines on both sides of the roadway. If the roadway width does not meet the requirements for metal support, it is also necessary to expand and brush the sidewalls of the roadway. After the support preparation work is completed, install the column legs and arch top of the metal support at each support section, fix the metal support on the roadway wall, then effectively connect the column legs and arch top with fixing devices, and finally connect the supports of each section along the roadway extension direction with tie rods or struts to form a complete support structure.

[0003] Before installing the existing underground roadway metal support, it is necessary to clean the soft body of the roadway floor and remove the water, wind, and electricity pipelines on the sidewalls of the roadway. After the support is completed, it is also necessary to restore the water, wind, and electricity pipelines on the sidewalls of the roadway. Especially for old roadways where the width does not meet the requirements for metal support, the above operations must be carried out. It is also necessary to expand and brush both sides of the old roadway before installing the metal support, resulting in problems such as a large amount of preparatory work before support, complex construction procedures, long construction periods, and relatively high steel consumption.

[0004] The information disclosed in the background art section is only intended to enhance the overall understanding of the present utility model and should not be regarded as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0005] This application provides a steel frame support structure for underground roadways to address the above technical problems. This structure has less preparatory work, simple construction procedures, a short construction period, and less steel consumption, and is particularly suitable for supporting narrow old roadways.

[0006] This application provides a steel frame support structure for underground roadways, including: column legs symmetrically arranged at the boundary between the roadway sidewall and the roadway roof on each roadway section; a mining U-shaped steel welded on the column legs; a roadway top support frame installed on the mining U-shaped steels on both sides of the roadway; and the roadway top support frame is supported and connected to the roadway roof.

[0007] Preferably, the column leg includes: a steel bar support rod and a mining U-shaped steel; the steel bar support rod is installed in the opposite sidewalls of the roadway sidewall; the mining U-shaped steel is installed on the exposed end of the steel bar support rod; and both ends of the roadway top support frame are respectively connected to the mining U-shaped steels on both sides.

[0008] Preferably, it comprises: a plurality of anchor holes; the anchor holes are arranged in pairs on a side wall of the side wall of the tunnel; the steel support rods are inserted in pairs into the anchor holes; and the two sides of the opening end of the mining U-shaped steel are respectively connected to the paired steel support rods.

[0009] Preferably, the anchor holes on the two opposite side walls of the tunnel are on the same horizontal plane.

[0010] Preferably, both ends of the tunnel top support frame are respectively connected to the closed ends of the mining U-shaped steel.

[0011] Preferably, the anchor holes include: a first anchor hole, a second anchor hole, a third anchor hole, and a fourth anchor hole, which are opened in pairs on both side walls of the side wall of the tunnel.

[0012] Preferably, it comprises: a plurality of tie rods; the tie rods are arranged along the extension direction of the tunnel and are respectively connected to the tunnel top support frames on each tunnel support section.

[0013] Preferably, the steel support rod is round steel.

[0014] The beneficial effects of this application include:

[0015] 1) The underground tunnel steel frame support structure provided in the present application has a simple structure. By arranging an arch support on the interface between the tunnel side and the tunnel roof, while ensuring the support reliability, there is no need to clean the loose parts of the tunnel bottom plate, remove the wind, water and electricity pipelines on the tunnel side, and reduce the expansion area of the old tunnel. The metal bracket support on the top of the tunnel that meets the use requirements can be installed, thereby improving the support efficiency and reducing the workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic cross-sectional view of a steel frame support structure for an underground tunnel in at least one embodiment provided in the present application;

[0017] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure in the middle AA direction;

[0018] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0019] Legend:

[0020] Tunnel side wall 1, tunnel roof 2, tunnel top support frame 3, mining U-shaped steel 4, round steel 5. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0023] The technical means not detailed in this application and not used to solve the technical problems of this application are set according to the common general knowledge in the art, and various ways of setting common general knowledge can be implemented.

[0024] See Figures 1 to 3 , the underground roadway steel frame support structure provided in this application includes: column legs and a roadway top support frame 3 provided on each roadway support section; the column legs are provided on the interface between the roadway side wall 1 and the roadway roof 2; both ends of the roadway top support frame 3 are respectively installed on the column legs and are supported and connected to the roadway roof 2. The roadway top support frame 3 is the arch top.

[0025] In a specific embodiment, the column legs include: paired steel bar support rods and mining U-shaped steel 4; anchor holes are symmetrically and spaced in pairs on the two side walls on both sides of the roadway side wall 1; the paired steel bar support rods are inserted into the anchor holes opened on one side of the roadway side wall 1 and are spaced; the ends of the steel bar support rods are exposed and arranged on the outer wall of the roadway side wall 1; the first side and the second side on the open end of the mining U-shaped steel 4 are respectively welded and fixed to the steel bar support rods.

[0026] In a specific embodiment, the anchor holes include: a first anchor hole, a second anchor hole, a third anchor hole, and a fourth anchor hole; the first anchor hole, the second anchor hole, the third anchor hole, and the fourth anchor hole are opened in pairs on the two side walls of the roadway side wall 1. The first anchor hole and the second anchor hole are spaced on the first side wall of the roadway side wall 1; on the second side wall opposite to the first side wall of the roadway side wall 1, the third anchor hole and the fourth anchor hole are symmetrically opened with respect to the first anchor hole and the second anchor hole.

[0027] In a specific embodiment, the first anchor hole, the second anchor hole, the third anchor hole, and the fourth anchor hole are in the same cross-section. This setting is beneficial to improving the installation stability of the roadway top support frame 3 and preventing tilting.

[0028] In a specific embodiment, steel bar support rods are respectively inserted into the first anchor hole, the second anchor hole, the third anchor hole, and the fourth anchor hole.

[0029] In a specific embodiment, the mine-used U-shaped steel 4 includes an open end and a closed end. The closed end is closed and serves as a support point for installing the roadway top support frame 3. After the open end is adjusted according to the spacing of the steel bar support rods, it is welded and fixed to the steel bar support rods to form a support seat.

[0030] In a specific embodiment, multiple support sections are set in the roadway according to the support requirements. Legs and the roadway top support frame 3 are set on each support section. The roadway top support frames 3 set on each support section are connected by tie rods, so as to effectively support the whole roadway.

[0031] In a specific embodiment, the construction method that does not require broading: Four bolt holes (two on each of the left and right sides) are set at the arch starting position of the roadway side wall of each support section. The round steel 5 is inserted and fixed in the opened bolt holes, and the mine-used U-shaped steel 4 is welded on the two round steels 5 on the same side of the roadway to obtain the support seat installed in the roadway side wall 1. The support seat serves as the metal support leg required for this support. The four bolt holes are opened on the joint surface between the roadway side wall 1 and the roadway roof 2, so that the support of the underground roadway can be realized without broading the underground roadway. It is especially suitable for the support of old and small-sized roadways.

[0032] In a specific embodiment, the construction method for the roadway that requires broading: Measure the distance between the two ends of the roadway top support frame 3 of the roadway that needs steel frame support. According to the measurement result, the roadway roof 2 that does not meet the metal support requirements and the position 10 cm downward from the boundary between the roadway side wall 1 and the roadway roof 2 are broaded. After the broading is completed, bolt holes are constructed at the broading boundary position of the roadway side wall 1 and the round steel 5 is installed. After the round steel 5 is installed, the mine-used U-shaped steel 4 is welded on the two round steels 5 on the same side of each support section as the support seat of the roadway top support frame 3. After the welding is completed, the two ends of the metal support of the roadway top support frame 3 are respectively welded on the support seats on both sides of the roadway. Finally, the roadway top support frames 3 of each support section are connected by tie rods or struts to form a complete support structure. Adopting this structure can reduce the broading area and the support workload.

Claims

1. An underground roadway steel frame support structure, characterized in that, Including those arranged on each roadway cross-section: leg columns symmetrically arranged at the boundary position between the roadway side wall (1) and the roadway roof (2); a mining U-shaped steel (4) welded on the leg columns; a roadway top support frame (3) installed on the mining U-shaped steels (4) on both sides of the roadway; the roadway top support frame (3) is supported and connected to the roadway roof (2).

2. The underground roadway steel frame support structure according to claim 1, characterized in that, The leg columns include: steel bar support rods; the steel bar support rods are installed in the two opposite side walls of the roadway side wall (1); the mining U-shaped steel (4) is installed on the exposed ends of the steel bar support rods; both ends of the roadway top support frame (3) are respectively connected to the mining U-shaped steels (4) on both sides.

3. The underground roadway steel frame support structure according to claim 2, characterized in that, Including: Multiple bolt holes; the bolt holes are arranged in pairs on one side wall of the roadway side wall (1); The steel bar support rods are inserted into the bolt holes in pairs; both sides of the open end of the mining U-shaped steel (4) are respectively connected to the paired steel bar support rods.

4. The underground roadway steel frame support structure according to claim 3, characterized in that, The bolt holes on the two opposite side walls of the roadway side wall (1) are on the same horizontal plane.

5. The underground roadway steel frame support structure according to claim 2, characterized in that, Both ends of the roadway top support frame (3) are respectively connected to the closed ends of the mining U-shaped steels (4).

6. The underground roadway steel frame support structure according to claim 3, characterized in that, The bolt holes include: the first bolt hole, the second bolt hole, the third bolt hole, and the fourth bolt hole are arranged in pairs on the two side walls of the roadway side wall (1).

7. The underground roadway steel frame support structure according to claim 1, characterized in that, Including: Multiple tie rods; the tie rods are arranged along the roadway extension direction and are respectively connected to the roadway top support frames (3) on each roadway support cross-section.

8. The underground roadway steel frame support structure according to claim 2, characterized in that, The steel bar support rods are round steel bars.

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