A throttling and plugging structure and method for controlling flow regime of a tailings pond drainage system

Abstract

The present invention discloses a throttling and blocking structure and method for controlling the flow state of a tailings pond drainage system, which is achieved by a combination of a counterweight pier, a gate chute, a throttling gate, a blocking gate, a gate bracket, a throttling gate lifting electric hoist, a blocking gate lifting electric hoist and a wire rope. The throttling gate is used to control the backwater working flow state of the tailings pond drainage system, so that the normal backwater of the drainage system is converted from a free flow to a semi-pressure flow or a pressure flow, so that the drainage culvert is completely filled with water and the drainage well is partially filled with water in a balanced state of the drainage system. When tailings leak from the drainage system, they flow into the drainage culvert at a lower speed, thereby achieving the effect of basically eliminating the water hammer effect. The drainage system is blocked by the blocking gate, and the tailings are safely blocked in the drainage system to prevent the tailings from leaking through the drainage system and causing safety and environmental accidents. The entire construction speed is fast and the cost is low, thereby reducing the production and operation costs for the enterprise.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine engineering tailing pond, in particular to a throttling and plugging structure and method for controlling flow state of tailing pond drainage system. BACKGROUND

[0002] The main function of the tailing pond drainage system is to return water in normal production and discharge flood in flood season, control the clarification distance of the tailing pond and the safety superhigh of the tailing pond, and is a major safety facility of the tailing pond.

[0003] At present, the most commonly used type of tailing pond drainage system is "drainage well + drainage culvert", and the flow state of the drainage system under the normal production return water condition of the tailing pond is free flow. For the drainage system with high safety, the drainage system also operates in the flow state of free flow under the flood condition.

[0004] Tailing pond dam break and drainage system structure damage are two main conditions leading to tailing leakage. In view of the tailing pond drainage system, such as the drainage well tilting, drainage well or drainage culvert structure damage and other signs of drainage system risk, in order to plug the drainage system and withstand the impact force of the tailing sand gushing from a high place, at present, the concrete is basically used to permanently plug the drainage culvert, the tailing sand leakage risk is controlled, and the drainage system needs to be reconstructed after the tailing sand leakage risk is controlled. The permanent plugging effect is good, and it is more suitable for the unrepairable structural damage of the drainage system. For the case that the damaged drainage system can be reused after repair, the permanent plugging will cause waste of enterprise investment. SUMMARY

[0005] The present application aims to provide a throttling and plugging structure and method for controlling flow state of tailing pond drainage system, which has fast construction speed, low cost, and can reuse the original drainage system after the flood discharge system risk is controlled, thereby reducing the production and operation cost of enterprises, and solving the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] The throttling and plugging structure for controlling the flow state of the tailing pond drainage system comprises a counterweight pier, a gate sliding groove, a throttling gate, a plugging gate, a gate support, a throttling gate lifting electric hoist and a plugging gate lifting electric hoist; the reinforcing steel of the counterweight pier is implanted into the sidewall of the drainage culvert and is formed by pouring concrete; the gate sliding groove is arranged above the drainage culvert and two gate sliding grooves are arranged at intervals of 4m, wherein the gate sliding groove at the upstream is used for installing the throttling gate and the gate sliding groove at the downstream is used for installing the plugging gate; the throttling gate lifting electric hoist matched with the throttling gate is arranged, and the throttling gate lifting electric hoist is connected with the throttling gate through a steel wire rope; the plugging gate is connected with the plugging gate lifting electric hoist through a steel wire rope, and the plugging gate lifting electric hoist and the throttling gate lifting electric hoist are fixed on the counterweight pier through the foundation bolts pre-buried in the counterweight pier; the corresponding gate support below the gate is connected by a steel wire rope, and the gate support is fixed above the gate sliding groove through the foundation bolts pre-buried in the counterweight pier.

[0008] Further, the counterweight pier adopts a C20 reinforced concrete structure, and the reinforcing steel of the counterweight pier 1 is implanted into the sidewall of the drainage culvert with a depth of 5-10 cm.

[0009] Further, the gate sliding groove adopts a steel plate with a thickness of 15 mm, and a gate installation port with a central width of 55 mm is formed by welding according to the size of the drainage culvert.

[0010] Further, the throttling gate adopts a steel plate with a thickness of 50 mm, and a water flow hole is formed on the throttling gate according to the water flow of the normal working condition of the tailing pond and the flow state of the drainage system.

[0011] Further, the plugging gate adopts a steel plate with a thickness of 50 mm.

[0012] Further, the gate support adopts a profile steel with a thickness of 20 mm, is welded into a "herringbone" support, is installed above the gate sliding groove and is used for suspending the throttling gate and the plugging gate.

[0013] Further, the throttling gate lifting electric hoist and the plugging gate lifting electric hoist adopt electric hoists with a lifting capacity of 2000 kg and are used for controlling the lifting of the throttling gate and the plugging gate.

[0014] The present application provides another technical solution: a throttling and plugging method for controlling the flow state of the tailing pond drainage system, which is realized based on a throttling and plugging structure for controlling the flow state of the tailing pond drainage system and comprises the following steps:

[0015] First step: slotting of gate installation port: excavate a drainage culvert to the culvert foundation layer upstream of the stilling basin, excavate the installation port of the blocking gate directly above the drainage culvert 6m away from the stilling basin, excavate the installation port of the throttling gate directly above the drainage culvert 10m away from the stilling basin, the distance between the two gate installation ports is 4m, the slotting width of the gate installation is 100mm, and the slotting is to the position of 1 / 2 of the circular drainage culvert section;

[0016] Second step: pouring of counterweight piers and installation of gate sliding grooves: 5-10cm holes are drilled on the outer surface of the drainage culvert on both sides and the upper part using a handheld electric drill, threaded steel bars with a diameter of 20mm are implanted into the side wall of the drainage culvert, two gate sliding grooves are prefabricated and installed before pouring the counterweight piers, and C20 concrete is used for pouring, the length of the counterweight piers is 14m;

[0017] Third step: installation of throttling gate, blocking gate and gate support: embed anchor bolts during pouring of the counterweight piers according to the size of the gate support and the position of the gate sliding groove, after the concrete strength of the counterweight piers reaches 75% of the design value, lower the throttling gate and the blocking gate into the gate sliding groove, then install and fix the gate support and the lifting electric hoist using the anchor bolts, connect the gate and the electric hoist by passing a steel wire rope over the pulley of the gate support, and control the lifting of the throttling gate and the blocking gate by using the electric hoist;

[0018] Fourth step: adjusting the throttling gate to control the working flow pattern of the drainage system: lift the blocking gate to the non-gate-in state by using the lifting electric hoist of the blocking gate, fully gate in the throttling gate by using the electric hoist of the throttling gate, and control the flow section at the throttling gate by using the electric hoist of the throttling gate, so as to adjust the working flow pattern of the drainage system to semi-pressure flow or pressure flow, so that the drainage culvert is fully filled with water and part of the drainage well is filled with water in the balanced state of the drainage system.

[0019] Fifth step: detection of tailings at the outlet of the culvert and control of the blocking gate: detect the water flow at the outlet of the drainage culvert regularly, and immediately lower the blocking gate by starting the electric hoist of the blocking gate as soon as a large amount of tailings is carried by the water flow at the outlet of the culvert, so as to complete the blocking of the drainage system of the tailings pond.

[0020] Compared with the prior art, the beneficial effects of the present application are:

[0021] 1. The throttling and blocking structure and method for controlling the flow pattern of the drainage system of the tailings pond can control the flow pattern of the working backwater of the drainage system of the tailings pond, change the normal backwater of the drainage system from free flow to semi-pressure flow or pressure flow, make the drainage culvert be fully filled with water and part of the drainage well be filled with water in the balanced state of the drainage system, and control the flow rate of the tailings in the drainage culvert when the drainage system is damaged and the tailings leak from the drainage system, so as to prevent the formation of serious water hammer effect.

[0022] 2、The throttling and plugging structure and method for controlling the flow state of the tailings pond drainage system, by controlling the flow section of the drainage culvert through the throttling gate, once tailings leakage occurs, the impact force of the tailings will not affect the gate of the plugging gate; the counterweight pier at the plugging place of the drainage culvert can effectively bear the impact of the discharged tailings on the plugging structure, ensuring that the drainage culvert structure is not damaged, and safely plugging the tailings in the drainage system. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the overall structure schematic diagram of the present application;

[0024] Figure 2 is the throttling gate construction structure schematic diagram of the present application;

[0025] Figure 3 is the plugging gate construction structure schematic diagram of the present application;

[0026] Figure 4 is the front view of the gate and gate bracket installation structure of the present application;

[0027] Figure 5 is the side view of the gate and gate bracket installation structure of the present application;

[0028] Figure 6 is the front view of the gate sliding groove of the present application;

[0029] Figure 7 is the front view of the gate structure of the present application.

[0030] In the figure: 1, counterweight pier; 2, gate sliding groove; 3, throttling gate; 4, plugging gate; 5, gate bracket; 6, throttling gate lifting electric hoist; 7, plugging gate lifting electric hoist; 8, steel wire rope. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] Please refer to Figures 1-7The throttling and plugging structure for controlling the flow state of the tailing pond drainage system in the embodiment of the present application comprises a counterweight pier 1, a gate sliding groove 2, a throttling gate 3, a plugging gate 4, a gate support 5, a throttling gate lifting electric hoist 6 and a plugging gate lifting electric hoist 7; the reinforcing steel of the counterweight pier 1 is implanted into the sidewall of the drainage culvert and is formed by pouring concrete; the gate sliding groove 2 is arranged right above the drainage culvert and two gate sliding grooves 2 are arranged at intervals of 4 m, wherein the gate sliding groove 2 at the upstream is used for installing the throttling gate 3 and the gate sliding groove 2 at the downstream is used for installing the plugging gate 4; the throttling gate lifting electric hoist 6 is arranged in the throttling gate 3 in a matched mode, the throttling gate lifting electric hoist 6 is connected with the throttling gate 3 through a steel wire rope 8, the steel wire rope 8 is a steel wire rope capable of bearing a pulling force of 2000 kg; the plugging gate 4 is connected with the plugging gate lifting electric hoist 7 through the steel wire rope 8, the plugging gate lifting electric hoist 7 and the throttling gate lifting electric hoist 6 are fixed on the counterweight pier 1 through the foundation bolts pre-buried in the counterweight pier 1 and are connected with the gates below the corresponding gate supports 5 through the steel wire rope 8, the gate supports 5 are fixed above the gate sliding grooves 2 through the foundation bolts pre-buried in the counterweight pier 1; wherein the counterweight pier 1 adopts a C20 reinforced concrete structure, the reinforcing steel of the counterweight pier 1 is implanted into the sidewall of the drainage culvert to a depth of 5-10 cm; the gate sliding groove 2 adopts a steel plate with a thickness of 15 mm, a gate installation opening with a center width of 55 mm is formed by welding according to the size of the drainage culvert; the throttling gate 3 adopts a steel plate with a thickness of 50 mm, water flow holes are arranged on the throttling gate 3 according to the water flow of the normal working condition of the tailing pond and the flow state of the drainage system, the gate opening area can be calculated according to the water flow of the normal working condition of the tailing pond and the flow state of the drainage system; the plugging gate 4 adopts a steel plate with a thickness of 50 mm; the gate support 5 adopts a profile steel with a thickness of 20 mm, is welded into a “human”-shaped support and is installed right above the gate sliding groove 2 and is used for suspending the throttling gate 3 and the plugging gate 4; the throttling gate lifting electric hoist 6 and the plugging gate lifting electric hoist 7 adopt electric hoists with a lifting capacity of 2000 kg and are used for controlling the lifting of the throttling gate 3 and the plugging gate 4.

[0033] In the above embodiment, the present application adopts the throttling gate to control the flow section of the drainage culvert of the tailing pond, adjusts the free flow into semi-pressure flow or pressure flow by changing the flow state of the drainage system in the normal working condition, secondly, the plugging gate 4 is adopted to plug the tailings leaked through the drainage system, the throttling and plugging two gates are adopted to plug the drainage system and the counterweight structure is adopted to bear the impact of the tailings discharged through the drainage system at the plugging position.

[0034] In order to further better explain the embodiment of the present application, a method for throttling and plugging the flow state of the tailing pond drainage system is further provided, comprising the following steps:

[0035] First step: slotting the installation port of the gate: excavate the drainage culvert to the culvert foundation layer upstream of the stilling basin, excavate the installation port of the blocking gate 4 directly above the drainage culvert 6m away from the stilling basin, excavate the installation port of the throttling gate 3 directly above the drainage culvert 10m away from the stilling basin, the distance between the two gate installation ports is 4m, the slotting width of the gate installation is 100mm, and the slotting is to the position of 1 / 2 of the circular drainage culvert section;

[0036] Second step: pouring of the counterweight pier 1 and installation of the gate sliding groove 2: drill 5-10cm holes on the outer surface of the drainage culvert on both sides and the upper part using a handheld electric drill, implant threaded steel with a diameter of 20mm into the side wall of the drainage culvert, pre-install two gate sliding grooves 2 before pouring the counterweight pier 1, use C20 concrete for pouring, and the length of the counterweight pier 1 is 14m;

[0037] Third step: installation of the throttling gate 3, the blocking gate 4 and the gate support 5: embed anchor bolts during the pouring of the counterweight pier 1 according to the size of the gate support 5 and the position of the gate sliding groove 2, after the concrete strength of the counterweight pier 1 reaches 75% of the design value, lower the throttling gate 3 and the blocking gate 4 into the gate sliding groove 2, then install and fix the gate support 5 and the lifting electric hoist using anchor bolts, connect the gate and the electric hoist using steel wire rope 8 that passes over the pulley of the gate support 5, and control the lifting of the throttling gate 3 and the blocking gate 4 using the electric hoist;

[0038] Fourth step: adjusting the throttling gate 3 to control the working flow pattern of the drainage system: use the blocking gate lifting electric hoist 7 to pull the blocking gate 4 to the non-gate-in state, use the throttling gate electric hoist 6 to pull the throttling gate 3 to be fully gated, use the throttling gate electric hoist 6 to control the flow cross section at the throttling gate 3, adjust the working flow pattern of the drainage system to semi-pressure flow or pressure flow, so that the drainage culvert is completely filled with water and part of the drainage well is filled with water under the balanced state of the drainage system;

[0039] Fifth step: detecting the tailings at the outlet of the culvert and controlling the blocking gate 4: detect the water at the outlet of the drainage culvert regularly, once there is a large amount of tailings carried by the water at the outlet of the culvert, immediately start the blocking gate electric hoist 7 to lower the blocking gate 4, and complete the blocking of the drainage system of the tailings pond.

[0040] In the above implementation method: the application is successfully applied to actual engineering cases, a tailing pond has the risk of tailing leakage due to the inclination of the overflow tower, in order to take effective measures in time to prevent tailing leakage from causing safety and environmental protection accidents, a throttle and a blocking two different function gate plates are arranged at the outlet of the drainage culvert pipe, which is applied to the flow state of the tailing pond control drainage system to prevent tailing leakage, is suitable for the downstream blocking prevention measures taken on the drainage culvert pipe before the tailing leakage of the tailing pond, has fast construction speed and low cost, and after the risk of the flood drainage system is controlled, the original drainage system can be reused, thereby reducing the production and operation cost of the enterprise.

[0041] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacements or changes according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A throttling and blocking structure for controlling the flow pattern of a tailings pond drainage system, characterized in that: The invention comprises a counterweight pier (1), a gate chute (2), a throttling gate (3), a blocking gate (4), a gate bracket (5), a throttling gate lifting electric hoist (6) and a blocking gate lifting electric hoist (7); the steel bars of the counterweight pier (1) are embedded in the side wall of the drainage culvert and are cast with concrete; the gate chute (2) is opened just above the drainage culvert and is opened with two at intervals of 4m, wherein the gate chute (2) at the upstream is used for installing the throttling gate (3), and the gate chute (2) at the downstream is used for installing the blocking gate (4), and the throttling gate (3) is provided with a matching The throttle gate lifts an electric hoist (6), which is connected to the throttle gate (3) through a steel wire rope (8); the blocking gate (4) is connected to the blocking gate lift electric hoist (7) through a steel wire rope (8); the blocking gate lift electric hoist (7) and the throttle gate lift electric hoist (6) are fixed to the counterweight pier (1) through anchor bolts pre-buried in the counterweight pier (1), and are connected to the gate below the corresponding gate bracket (5) using a steel wire rope (8); the gate bracket (5) is fixed to the top of the gate slide (2) through anchor bolts pre-buried in the counterweight pier (1).

2. A throttling and blocking structure for controlling the flow state of a tailings pond drainage system according to claim 1, characterized in that: The counterweight pier (1) adopts a C20 reinforced concrete structure, and the steel bars of the counterweight pier (1) are embedded into the side wall of the drainage culvert at a depth of 5-10 cm.

3. The throttling and blocking structure for controlling the flow state of a tailings pond drainage system according to claim 1, characterized in that: The gate slide groove (2) is made of a 15 mm thick steel plate, which is welded according to the size of the drainage culvert to form a gate installation opening with a center width of 55 mm.

4. The throttling and blocking structure for controlling the flow state of a tailings pond drainage system according to claim 1, characterized in that: The throttling gate (3) is made of a steel plate with a thickness of 50 mm, and a water hole is opened on the throttling gate (3) according to the water flow rate under normal working conditions of the tailings pond and the flow state of the drainage system.

5. The throttling and blocking structure for controlling the flow state of the tailings pond drainage system according to claim 1, characterized in that: The blocking gate (4) is made of a steel plate with a thickness of 50 mm.

6. The throttling and blocking structure for controlling the flow state of a tailings pond drainage system according to claim 1, characterized in that: The gate plate bracket (5) is made of 20 mm thick steel, welded into a "human" shaped bracket, and installed just above the gate plate slide (2) for suspending the throttling gate plate (3) and the blocking gate plate (4).

7. The throttling and blocking structure for controlling the flow state of a tailings pond drainage system according to claim 1, characterized in that: The throttle gate lifting electric hoist (6) and the blocking gate lifting electric hoist (7) are electric hoists with a lifting capacity of 2000 kg, and are used to control the lifting and lowering of the throttle gate (3) and the blocking gate (4).

8. A method for controlling the throttling and blocking flow pattern of a tailings pond drainage system, based on the throttling and blocking structure for controlling the flow pattern of a tailings pond drainage system according to claim 1, characterized in that: The following steps are involved: Step 1: Slotting for the gate installation opening: excavate a drainage culvert upstream of the stilling pool to the culvert foundation layer, excavate the installation opening for the blocking gate (4) just above the drainage culvert 6m away from the stilling pool, and excavate the installation opening for the throttling gate (3) just above the drainage culvert 10m away from the stilling pool. The distance between the two gate installation openings is 4m, and the width of the gate installation slot is 100mm. The slot is excavated to the 1 / 2 position of the circular drainage culvert section. Step 2: Casting of the counterweight pier (1) and installation of the gate chute (2): Use a handheld electric drill to drill holes 5-10 cm in diameter on the outer surface of the drainage culvert on both sides and the upper part of the drainage culvert, and use 20 mm diameter threaded steel bars to implant into the side wall of the drainage culvert. Before casting the counterweight pier (1), prefabricate and install the two gate chute (2) and use C20 concrete to cast. The length of the counterweight pier (1) is 14 m. Step 3: Installation of the throttling gate (3), the blocking gate (4) and the gate bracket (5): pre-embed the anchor bolts when pouring the counterweight pier (1) according to the size of the gate bracket (5) and the position of the gate chute (2). After the concrete strength of the counterweight pier (1) reaches 75% of the design value, the throttling gate (3) and the blocking gate (4) are dropped into the gate chute (2). Then, the gate bracket (5) and the lifting electric hoist are installed and fixed using the anchor bolts. The steel wire rope (8) is used to pass around the pulley of the gate bracket (5) to connect the gate to the electric hoist. The electric hoist is used to control the lifting and lowering of the throttling gate (3) and the blocking gate (4). Step 4: Adjust the throttle gate (3) to control the working flow state of the drainage system: use the blocking gate lifting electric hoist (7) to pull the blocking gate (4) to the non-gate-in state, use the throttle gate lifting electric hoist (6) to pull the throttle gate (3) to completely gate in, use the throttle gate lifting electric hoist (6) to control the flow section at the throttle gate (3), and adjust the working flow state of the drainage system to semi-pressure flow or pressure flow, so that the drainage culvert is completely filled with water in the equilibrium state of the drainage system, and the drainage well is partially filled with water; Step 5: Detection of tailings at the culvert outlet and control of the blocking gate (4): Regular detection of the outflowing water at the outlet of the drainage culvert is carried out. Once a large amount of tailings is found in the outflowing water at the culvert outlet, the blocking gate lifting electric hoist (7) is immediately started to drop the blocking gate (4) to complete the blocking of the tailings pond drainage system.

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