Supporting frame for two-step stoping of ore body

Abstract

The utility model discloses a supporting frame for two-step stoping of an ore body. Relates to the technical field of mining, and comprises two hydraulic frames and a plurality of trusses, and the hydraulic frames and the trusses abut against the side wall of a roadway to support the roadway; the two hydraulic frames are arranged in a roadway in parallel at intervals in the length direction of the roadway, the trusses are arranged between the two hydraulic frames in parallel at intervals, the trusses are connected with the hydraulic frames through connecting rods, and the trusses are connected through connecting rods; through the arrangement of the hydraulic frame and the truss, in the two-step stoping process, the hydraulic frame and the truss support the roadway, the problem that a first-step filling body collapses in the two-step ore body stoping process can be effectively solved, the problem that a second-step ore body is overstocked is effectively solved, and meanwhile the safety of the construction operation environment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of mining, in particular to a supporting frame used for two-step mining of an ore body. Background Art

[0002] Backfill mining is a mining method that can control the ground pressure of the mining area, support the surrounding rock, reduce, delay and prevent the destruction and movement of the surrounding rock in the post-mining empty area. It has been widely used in many mines at home and abroad and has become an efficient mining method in my country. In the two-step mining process of backfilling after the stage empty area, usually the first step is to mine the mine room and use tailings for cementation filling. The second step uses the backfill body of the first step as support, recovers the ore pillars and fills them with tailings or waste rock.

[0003] In the actual production process of mines, due to the limitation of the gelling time of the filling body, it is often found that the strength of the first-step filling body does not meet the design requirements or the top connection effect is not good. In the second-step ore body recovery process, the first-step filling body collapses and other problems occur. The second-step ore body does not have the conditions for safe recovery, resulting in a large amount of ore body being compressed by the filling body, causing a huge waste of ore body resources, and at the same time causing a great impact on the working environment during the ore body recovery process. Utility Model Content

[0004] In order to safely recover the two-step ore body, the present application provides a support frame for the two-step recovery of the ore body.

[0005] The present application provides a support frame for two-step mining of an ore body, which adopts the following technical solution:

[0006] A support frame for two-step mining of an ore body comprises two hydraulic frames and a plurality of trusses, wherein the hydraulic frames and the trusses are both in contact with the side walls of a tunnel to support the tunnel; the two hydraulic frames are arranged in parallel and spaced apart in the tunnel along the length direction of the tunnel, the plurality of trusses are arranged in parallel and spaced apart between the two hydraulic frames, the trusses are connected to the hydraulic frames by connecting rods, and the trusses are connected to each other by connecting rods.

[0007] Optionally, the hydraulic frame is formed by splicing two I-shaped rods and two L-shaped rods; the two I-shaped rods are arranged in parallel and spaced apart in the width direction of the tunnel and respectively abut against the two side walls of the tunnel, the I-shaped rod is connected to one of the L-shaped rods by plugging, and the two L-shaped rods are connected by plugging; when the hydraulic frame is spliced, the L-shaped rod abuts against the top wall of the tunnel.

[0008] Optionally, jacks are provided at the four corners of the hydraulic frame, one end of the jack is provided with a shallow hole, and the other end of the jack is provided with a slot, the shallow hole is used to connect one end of the support rod, and the other end of the support rod is used to abut the side wall of the connecting tunnel; the slot is used to connect the connecting rod.

[0009] Optionally, the truss includes a cross bar and two vertical bars, the two vertical bars are arranged in parallel and spaced apart along the width direction of the tunnel and both abut against the side wall of the tunnel, and the two ends of the cross bar are respectively connected to the two vertical bars and abut against the top wall of the tunnel.

[0010] Optionally, a protrusion is provided at one end of the vertical rod, and grooves for inserting the protrusion are provided at both ends of the horizontal rod.

[0011] Optionally, both ends of the vertical rod and the horizontal rod are provided with through holes; and both ends of the connecting rod are respectively inserted into the through holes of two adjacent trusses.

[0012] Optionally, a threaded rod is coaxially arranged at one end of the connecting rod, and a threaded hole for inserting the threaded rod is opened along the length direction of the connecting rod at the other end.

[0013] Optionally, an arc-shaped protrusion is provided in the middle of the connecting rod for limiting the movement of the truss.

[0014] Optionally, a filling partition is provided on the hydraulic frame located deep in the tunnel, the filling partition is assembled on the hydraulic frame, and a filling window is provided on the filling partition.

[0015] In summary, this application includes the following beneficial technical effects:

[0016] This application uses the setting of hydraulic frames and trusses to support the tunnel during the two-step mining process, which can effectively solve the problem of collapse of the first-step filling body during the two-step ore body mining process, effectively solve the problem of backlog of the second-step ore body, and at the same time ensure the safety of the construction working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an overall installation diagram of a support frame used for two-step mining of an ore body in the present application;

[0018] Figure 2 yes Figure 1 The overall structure diagram of the middle hydraulic frame;

[0019] Figure 3 yes Figure 1 Side cross-sectional structural diagram of the middle hydraulic frame;

[0020] Figure 4 yes Figure 1 The overall structural diagram of the middle truss;

[0021] Figure 5 yes Figure 1 The overall structure diagram of the middle connecting rod;

[0022] Figure 6 yes Figure 1The overall structure diagram of the middle filling partition.

[0023] Description of reference numerals:

[0024] 1. Hydraulic frame; 11. I-shaped rod; 12. L-shaped rod; 13. Jack; 131. Shallow hole; 132. Slot; 2. Truss; 21. Vertical rod; 211. Bump; 22. Crossbar; 221. Groove; 23. Through hole; 3. Connecting rod; 31. Arc-shaped protrusion; 32. Threaded rod; 33. Threaded hole; 4. Filling partition; 41. Filling window; 5. Support rod; 6. Laneway; 7. Connecting lane. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-6 This application is described in further detail.

[0026] The embodiment of the present application discloses a support frame for two-step mining of an ore body, the support frame is used to support the filling body of the side wall of the tunnel 6 in the two-step mining to prevent it from collapsing; the support frame includes two hydraulic frames 1 and a plurality of trusses 2, the hydraulic frames 1 and the trusses 2 are both in contact with the side wall of the tunnel 6 to support the tunnel 6; the two hydraulic frames 1 are arranged in parallel and spaced apart in the tunnel 6 along the length direction of the tunnel 6, and the plurality of trusses 2 are spaced apart between the two hydraulic frames 1; the trusses 2 and the trusses 2 and the hydraulic frames 1 are connected by connecting rods 3.

[0027] The hydraulic frame 1 is formed by splicing two I-shaped rods 11 and two L-shaped rods 12; the two I-shaped rods 11 are respectively abutted against the two side walls of the tunnel 6; the upper end of the I-shaped rod 11 is connected to the L-shaped rod 12 by plugging, and the two L-shaped rods 12 are connected by plugging; the entire hydraulic frame 1 is similar to the structure of a door, abutting against the two side walls and the top wall of the tunnel 6.

[0028] The truss 2 includes a cross bar 22 and two vertical bars 21. The two vertical bars 21 respectively abut against the two side walls of the tunnel 6. A protrusion 211 is provided at the upper end of the vertical bar 21, and grooves 221 for inserting the protrusion 211 are provided at both ends of the cross bar 22. The two ends of the cross bar 22 are respectively connected to the two vertical bars 21, and the cross bar 22 abuts against the top wall of the tunnel 6. The entire truss 2 forms a door-like structure; it abuts against the side walls and top wall of the tunnel 6 to prevent the filling body from collapsing.

[0029] The four corners of the hydraulic frame 1 are each provided with a jack 13, one end of the jack 13 is provided with a shallow hole 131, and the other end is provided with a slot 132, wherein the shallow hole 131 is used to connect the support rod 5, and the other end of the support rod 5 abuts against the side wall of the connecting tunnel 7; the slot 132 is used to connect the connecting rod 3; one end of the connecting rod 3 is provided with a threaded rod 32, and the other end is provided with a threaded hole 33 for connection of the threaded rod 32; the four corners of the truss 2 are each provided with a through hole 23, and the diameter of the through hole 23 is the same as the diameter of one end of the connecting rod 3 having the threaded hole 33; at the same time, in order to place the truss 2 to move on the connecting rod 3, an arc-shaped protrusion 31 is also provided on the connecting rod 3. After the truss 2 is connected to the connecting rod 3, the truss 2 abuts against the arc-shaped protrusion 31 to move now.

[0030] When it is necessary to install the support frame, first assemble the hydraulic frame 1 at the entrance of the tunnel 6, then insert the support rod 5 into the slot 132, and ensure that the other end of the support rod 5 abuts against the side wall of the connecting tunnel 7; then dig forward along the second-step tunnel 6; after digging a certain distance, connect the threaded rod 32 of the connecting rod 3 to the slot 132; after ensuring that the support rods 5 and connecting rods 3 at the four corners are in place, assemble the truss 2 at the end of the connecting rod 3, and insert the four connecting rods 3 into the through holes 23 at the four corners of the truss 2.

[0031] Thereafter, in the process of forward excavation, as the excavation progresses, the truss 2 is pushed forward by the jack 13, so that the truss 2 is supported at any place where the excavation is carried out; after the distance between the two connecting rods 3 is advanced, the truss 2 is spliced ​​again at the position where the truss 2 was spliced ​​for the first time, the jack 13 is retracted, and connected to the hydraulic frame 1 through the connecting rod 3, so that the splicing position of the truss 2 is a fixed position; after repeated construction in this way, the two-step mining can be completed.

[0032] After the mining is completed, the two-step filling operation of the mining area is started. Before the filling operation, the support rod 5 of the tunnel 6 is removed, and the hydraulic frame 1 is assembled at the end. The hydraulic rods of the hydraulic support assembled at the end and the surrounding rock support are used to complete the dismantling of the hydraulic frame 1 at the first end; before the first filling operation, the filling partition 4 is installed and fixed at the head of the hydraulic support assembled at the end, and the filling partition 4 is provided with a filling window 41. The filling operation is completed under the support of the hydraulic support and the truss 2.

[0033] After the first filling operation is completed and the filling body reaches the initial strength, the filling partition 4 is squeezed with the filling body to complete the removal of other assembled trusses 2 and the filling operations at each stage until the assembled trusses 2 and the assembled hydraulic supports are completely removed, i.e., all the filling operations are completed.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A support frame for two-step mining of an ore body, characterized in that: The invention comprises two hydraulic frames (1) and a plurality of trusses (2), wherein the hydraulic frames (1) and the trusses (2) are both in contact with the side walls of a tunnel (6) to support the tunnel (6); the two hydraulic frames (1) are arranged in parallel and spaced apart in the tunnel (6) along the length direction of the tunnel (6); the plurality of trusses (2) are arranged in parallel and spaced apart between the two hydraulic frames (1); the trusses (2) are connected to the hydraulic frames (1) by connecting rods (3); and the trusses (2) are connected to each other by connecting rods (3).

2. A support frame for two-step mining of an ore body according to claim 1, characterized in that: The hydraulic frame (1) is formed by splicing two I-shaped rods (11) and two L-shaped rods (12); the two I-shaped rods (11) are arranged in parallel and spaced apart along the width direction of the lane (6) and respectively abut against the side walls of the lane (6); the I-shaped rod (11) is connected to one of the L-shaped rods (12) by plugging, and the two L-shaped rods (12) are connected by plugging; when the hydraulic frame (1) is spliced, the L-shaped rod (12) abuts against the top wall of the lane (6).

3. A support frame for two-step mining of an ore body according to claim 2, characterized in that: The hydraulic frame (1) is provided with jacks (13) at the four corners, one end of the jack (13) is provided with a shallow hole (131), the other end of the jack (13) is provided with a slot (132), the shallow hole (131) is used to connect the support rod (5), the other end of the support rod (5) is used to abut against the side wall of the connecting tunnel (7); the slot (132) is used to connect the connecting rod (3).

4. A support frame for two-step mining of an ore body according to claim 1, characterized in that: The truss (2) comprises a crossbar (22) and two vertical bars (21); the two vertical bars (21) are arranged in parallel and spaced apart along the width direction of the tunnel (6) and both abut against the side wall of the tunnel (6); and the two ends of the crossbar (22) are respectively connected to the two vertical bars (21) and abut against the top wall of the tunnel (6).

5. A support frame for two-step mining of an ore body according to claim 4, characterized in that: One end of the vertical rod (21) is provided with a protrusion (211), and both ends of the horizontal rod (22) are provided with grooves (221) for the protrusion (211) to be inserted.

6. A support frame for two-step mining of an ore body according to claim 5, characterized in that: Through holes (23) are provided at both ends of the vertical rod (21) and the horizontal rod (22); and the two ends of the connecting rod (3) are respectively inserted into the through holes (23) of the two adjacent trusses (2).

7. A support frame for two-step mining of an ore body according to claim 1, characterized in that: A threaded rod (32) is coaxially arranged at one end of the connecting rod (3), and a threaded hole (33) for inserting the threaded rod (32) is provided at the other end of the connecting rod (3) along its length direction.

8. A support frame for two-step mining of an ore body according to claim 1, characterized in that: An arc-shaped protrusion (31) for limiting the movement of the truss (2) is provided in the middle of the connecting rod (3).

9. A support frame for two-step mining of an ore body according to claim 1, characterized in that: A filling partition (4) is provided on the hydraulic frame (1) located deep in the tunnel (6); the filling partition (4) is assembled on the hydraulic frame (1); and a filling window (41) is provided on the filling partition (4).

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