A method for repairing and reinforcing a metal mine ore chute

Abstract

The present application relates to a kind of repair reinforcement methods for metal mine ore chute, comprising, step one, build aerial ropeway platform;Step two, with ore filling main chute to distance main chute's ore discharge port 4m to 8m place;Step three, the hanging tray is hung into main chute, keep the bottom of hanging tray and the ore in main chute contact;Step four, in the bottom of main chute, the ore filled is mined, keep the bottom of hanging tray and the ore in main chute contact;Step five, build workbench;Step six, in workbench, the collapsed area of main chute is supported by spraying anchor;Step seven, the collapsed area of spray anchor support is completed and / or builds support frame;Step eight, repeat step four to step seven, until the collapsed area in main chute is all repaired and reinforced to complete;Repair on shaft wall, construction safety, construction mode is simple, and maximum degree reduces concrete pouring amount, shortens repair construction period, effectively increases the ore storage capacity of chute.

Description

Technical Field

[0001] This invention relates to a method for repairing and reinforcing ore passes, specifically a method for repairing and reinforcing ore passes in metal mines. Background Technology

[0002] Ore ore passes are one of the most important mining engineering projects in metal mines, serving as the vital link for ore collection, storage, and transportation. Damage to the main ore pass not only impacts production and presents significant repair challenges, but also threatens the normal operation of the entire ore passing system.

[0003] When a chute collapses, the usual approach is to abandon the original chute and rebuild it, or to re-pour concrete into the entire shaft and install manganese steel plates to reinforce the well wall.

[0004] However, the existing technology has the following drawbacks: rebuilding the well shaft is time-consuming and costly; re-pouring concrete and installing manganese steel plates for repair is a complex process with high costs and a long construction period. Summary of the Invention

[0005] To address the technical problems of long construction time and high cost of rebuilding shafts and complex procedures, high costs and long construction period caused by re-pouring concrete and installing manganese steel plates for repair in existing technologies, this invention provides a repair and reinforcement method for ore chutes in metal mines.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0007] A method for repairing and reinforcing ore passes in metal mines includes the following steps:

[0008] Step 1: Construct a sheave platform on the unloading platform at the main ore pass;

[0009] Step 2: Fill the main ore pass with ore until it is 4m to 8m away from the unloading port of the main ore pass;

[0010] Step 3: Use the sheave platform to lower the hoisting plate into the main ore pass, and make the bottom of the hoisting plate contact the ore in the main ore pass;

[0011] Step 4: Discharge the filled ore at the bottom of the main ore pass while keeping the bottom of the hoisting platform in contact with the ore in the main ore pass. When the ore surface is in the collapsed area of ​​the main ore pass, stop hoisting the ore in the main ore pass.

[0012] Step 5: Set up the workbench;

[0013] Step 6: On the workbench, spray anchor support is applied to the collapsed area of ​​the main chute;

[0014] Step seven, pouring concrete and / or building support frame to the collapsed area of the anchor support;

[0015] Step eight, repeat steps four to seven until the collapsed area in the main chute is completely repaired and reinforced.

[0016] The beneficial effects of the present application are: the construction method is simple, and the component installation is convenient; the anchor rod and the support frame are used to reinforce the shaft wall to prevent further collapse of the shaft wall; the concrete is used for the retaining wall to reduce the amount of concrete and ensure the normal use of the chute; in the case of large collapse range and collapse amount of the chute, the support frame is used for support, the shaft wall is repaired by this repair method, the construction is safe and simple, the amount of concrete pouring is minimized, the repair period is shortened, and the storage capacity of the chute is effectively increased.

[0017] On the basis of the above technical scheme, the present application can also be improved as follows.

[0018] Further, the anchor support method comprises the following steps: after cleaning the loose rocks in the collapsed area of the main chute, high-pressure spraying the first layer of cement concrete to the collapsed area of the main chute, then punching a plurality of anchor rods into the rock stratum of the collapsed area of the main chute, fixing and arranging the steel mesh on the anchor rods, and high-pressure spraying the second layer of cement concrete to the collapsed area of the main chute.

[0019] Further, the thickness of the first layer of cement concrete ranges from 20mm to 40mm, and the thickness of the second layer of cement concrete ranges from 90mm to 110mm.

[0020] Further, the step seven specifically comprises the following steps: along the length direction of the main chute, the collapsed area of the main chute is sequentially divided into an upper pouring section, a support reinforcement section and a lower pouring section, the upper pouring section and the lower pouring section are poured with concrete, and the support reinforcement section is reinforced by the support frame.

[0021] Further, the concrete pouring structure of the upper pouring section and the lower pouring section is plain concrete, and the concrete strength grade of the plain concrete is C30.

[0022] Further, the concrete pouring method comprises the following steps: when the rocks in the collapsed area of the main chute develop joint fissures and / or crack and / or appear faults, the entire upper pouring section and the entire lower pouring section are poured with concrete; when the rocks in the collapsed area of the main chute do not develop joint fissures and / or do not crack and / or do not have faults, a plurality of 4m-thick concrete retaining walls are built on the entire rock wall of the upper pouring section and the entire rock wall of the lower pouring section.

[0023] Further, the support frame comprises a plurality of I-beam and a plurality of threaded steel, the plurality of I-beams are arranged in multiple rows and multiple columns, the end faces of the two ends of each I-beam are respectively in abutment with the rock wall of the collapse area of the main chute, the two ends of each I-beam are respectively welded with at least one anchor rod, and each adjacent two I-beams are fixedly connected through a threaded steel, and the two ends of the threaded steel are respectively welded with the adjacent two I-beams.

[0024] Further, the step seven further comprises fixing a plurality of retaining walls on the rock wall of the support reinforcement section, and each retaining wall is fixedly connected with at least one anchor rod.

[0025] Further, the step nine comprises: when the repair and reinforcement of the collapse area in the main chute are completed, the hanging platform is removed.

[0026] Further, the method for removing the hanging platform comprises: lifting the hanging platform to the sealing disc at the well mouth of the main chute, and removing the sealing disc; then putting ore into the main chute through the upper branch chute, and piling the ore to the lower opening position of the lower branch chute, and then lowering the hanging platform to the ore, and removing the hanging platform.

[0027] The beneficial effect of the further scheme is that, because the sealing disc has been removed, the hanging platform is lowered to the upper branch chute for removal, thereby improving the operation safety. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The flow chart of the present application;

[0029] Figure 2 The structural schematic diagram of the well wall reinforcement repair of the present application;

[0030] Figure 3 The installation schematic diagram of the hoist of the present application;

[0031] Figure 4 The structural schematic diagram of the support frame;

[0032] Figure 5 The structural schematic diagram of the chute.

[0033] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0034] 1, main chute; 2, anchor rod; 3, upper pouring section; 4, retaining wall; 5, support frame; 6, floor; 7, lower pouring section; 8, I-beam; 9, threaded steel; 10, hoist; 11, head sheave platform; 12, ore unloading platform; 13, hanging platform; 14, ore; 15, upper branch chute; 16, lower branch chute. Detailed Implementation

[0035] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0036] like Figures 1 to 5 As shown in the figure, this embodiment provides a method for repairing and reinforcing ore passes in metal mines, including the following steps:

[0037] Step 1: Construct a sheave platform 11 on the unloading platform 12 at the unloading port of the main ore pass 1;

[0038] Step 2: Fill the main ore pass 1 with ore 14 until it is 5m away from the unloading port of the main ore pass 1;

[0039] Step 3: Use the sheave platform 11 to hoist the hoisting plate 13 into the main ore pass 1, and make the bottom of the hoisting plate 13 contact the ore 14 in the main ore pass 1;

[0040] Step 4: Release the ore 14 filled at the bottom of the main ore pass 1, while keeping the bottom of the hoisting platform 13 in contact with the ore 14 in the main ore pass 1. When the ore surface is in the collapsed area of ​​the main ore pass 1, stop hoisting the ore 14 in the main ore pass 1.

[0041] Step 5: Set up the workbench;

[0042] Step 6: On the workbench, spray anchor support is applied to the collapsed area of ​​the main chute 1;

[0043] Step 7: Pour concrete and / or build a support frame for the collapsed area after the shotcrete and anchor support is completed.

[0044] Step 8: Repeat steps 4 to 7 until the collapsed area in the main chute 1 is completely repaired and reinforced.

[0045] Step 9: After the collapsed area in the main chute 1 has been completely repaired and reinforced, the hoisting winch 10 is used to raise the hoisting platform 13 to the sealing plate at the opening of the main chute 1, and the sealing plate is removed; then, ore 14 is put into the main chute 1 through the upper branch chute 15, the ore 14 is piled up to the lower opening of the lower branch chute 16, and then the hoisting platform 13 is lowered onto the ore 14 and removed.

[0046] The jet anchor support method comprises the following steps: after the loose rocks in the collapsed area of the main chute 1 are cleaned, a first layer of cement concrete is jetted into the collapsed area of the main chute 1 at high pressure, then a plurality of anchor rods 2 are driven into the rock stratum of the collapsed area of the main chute 1, a steel mesh is fixed on the anchor rods 2, and a second layer of cement concrete is jetted into the collapsed area of the main chute 1 at high pressure. The thickness of the first layer of cement concrete is 30 mm, and the thickness of the second layer of cement concrete is 70 mm.

[0047] The step seven specifically comprises the following steps: the collapsed area of the main chute 1 is sequentially divided into an upper pouring section 3, a support and reinforcement section, and a lower pouring section 7 along the length direction of the main chute 1, the upper pouring section 3 and the lower pouring section 7 are poured with concrete, and the support and reinforcement section is reinforced by the support frame 5. Specifically, the step seven further comprises the following steps: a plurality of multi-face retaining walls 4 are fixedly arranged on the rock wall of the support and reinforcement section, and each retaining wall 4 is fixedly connected with at least one anchor rod 2.

[0048] The support and reinforcement section and the lower support and reinforcement section are divided by a floor 6, and the floor 6 is welded with the plurality of anchor rods 2.

[0049] Specifically, the concrete pouring structure of the upper pouring section 3 and the lower pouring section 7 is plain concrete, and the strength grade of the plain concrete is C30.

[0050] The concrete pouring method comprises the following steps: when the rocks in the collapsed area of the main chute 1 have joint fissure development and / or cracking and / or faults, the entire upper pouring section 3 and the entire lower pouring section 7 are poured with concrete; and when the rocks in the collapsed area of the main chute 1 do not have joint fissure development and / or cracking and / or faults, a plurality of 4m-thick concrete retaining walls are arranged on the entire rock wall of the upper pouring section 3 and the entire rock wall of the lower pouring section 7.

[0051] As shown in Figure 4 The support frame 5 comprises a plurality of I-beam 8 and a plurality of threaded steel 9. The plurality of I-beam 8 is arranged in multiple rows and multiple columns. The two end faces of each I-beam 8 are respectively abutted with the rock wall of the collapsed area of the main chute 1. The two ends of each I-beam 8 are respectively welded with at least one anchor rod 2. Each adjacent two I-beam 8 is fixedly connected by the threaded steel 9. The two ends of the threaded steel 9 are respectively welded with the adjacent two I-beam 8.

[0052] The specific construction method is as follows:

[0053] 1. A mine discharge platform 12 is installed at the wellhead of the main chute 1, and the head pulley platform 11 includes a lifting head pulley, a hoist pulley, a ash chute pulley and a safety ladder pulley. The head pulley platform 11 is built using 45# A I-beams, and after the head pulley platform 11 is assembled, angle steel is used to connect and fix the head pulley platform 11 to the base steel beams of the mine discharge platform 12.

[0054] 2. First, the main chute 1 is filled with ore 14 to a distance of 5m from the mine discharge opening 5, and then the hoist pulley 13 is assembled, and a ventilation system, a water supply system, a power supply system and a communication system are built.

[0055] During construction, the hoist pulley 13 closely follows the ore surface, and as the ore is discharged from the lower part of the chute, the ore surface gradually falls, and the hoist pulley 13 also falls, and in the process of falling, the shaft wall is treated, and a telescopic working platform is built using steel pipes at the lower layer, which is mainly to prevent personnel from standing on the ore and falling into danger, and personnel are required not to work directly on the ore 14, and as the ore 14 and the hoist pulley 13 are lowered, personnel standing on the working platform inspect the shaft wall, check the floating stone, install the support frame 5 and perform anchor net spray support.

[0056] The support frame 5 uses multiple 20# A I-beams 8 arranged in multiple rows and columns, and the multiple I-beams 8 are arranged with a horizontal spacing of 1m and a vertical spacing of 2m, and all the I-beams 8 are fixed to the rock wall through brackets, and the two ends of the I-beams 8 are tightly pressed against the rock surface, and adjacent two I-beams 8 are welded and connected by Φ32 threaded steel 9.

[0057] Among them, the construction scheme of reinforcement and repair is to analyze the engineering geological characteristics of the surrounding rock mass of the main chute 1, analyze the reasons for the collapse and damage of the main chute 1 from the engineering geological conditions, the erosion of the ore 14 in the chute to the shaft wall and the impact of the ore 14 falling into the chute to the shaft wall, etc., and combine the three-dimensional laser scanning results inside the chute to obtain the repair and reinforcement scheme, and take reinforcement and repair measures based on this.

[0058] The sequence of anchor net spray support construction is: first, clean the loose stones on the shaft wall, spray the rock surface with a thickness of 30mm, then install anchor rods 2 by drilling anchor rod holes, lay steel mesh so that the steel mesh closely adheres to the rock surface, weld the steel mesh to the end of the anchor rod 2, and then spray a layer of concrete to ensure a total thickness of 100mm of the sprayed concrete.

[0059] 3. After the anchor net spray support of each section of the shaft wall and the collapsed section is completed, concrete pouring is performed. The support structure is plain concrete, the concrete strength grade is C30, and 1m high combined metal formwork is used for cyclic masonry.

[0060] The concrete pouring is divided into two kinds: when the rock has no joint fissure development, good stability, no obvious cracking and fault, only the concrete retaining wall is poured at the end position of the collapsed area, that is, the formwork is erected 4m from the outermost shaft wall of the collapsed area to the shaft, 4m thick concrete is laid along the actual collapsed boundary to the shaft, the pouring height is 2m each time, and the cycle is repeated; when the rock has joint fissure development, poor stability, obvious cracking and fault, the whole collapsed area is filled with concrete. A set of combined steel formwork is assembled according to the shaft contour line, and the leveling and alignment are performed. After each set of combined formwork is poured, the upper edge of the combined formwork is cleaned, and then another set of formwork is assembled. When the height is enough, the lowermost set of formwork is removed and lifted to the hoist platform 13 for continuous assembly, and the cycle is repeated until the design position.

[0061] 4. After the collapsed section of the shaft is completely poured, the hoist platform 13 is lifted to the sealing disc position, the sealing disc is removed, and then the ore is discharged through the upper branch chute, the ore is stacked at the lower branch chute lower opening position, the hoist platform 13 is lowered onto the ore stack, and after disassembly and removal, the hoist platform 13 is lifted to the middle section through the branch chute

[0062] 5. The temporary hoisting equipment and facilities for repairing the shaft are removed, and the upper horizontal mine car supporting wheel and unloading track are restored and installed according to the original design.

[0063] The construction method of the present application is simple, and the component installation is convenient; the anchor rod and the support frame are used to reinforce the shaft wall to prevent further collapse of the shaft wall; the retaining wall part uses concrete pouring, which reduces the concrete amount and ensures the normal use of the chute; in the case of large collapsed range and collapsed amount of the chute, the support frame is used to support the middle part, the shaft wall is repaired by this repair method, the construction is safe and simple, the concrete pouring amount is reduced to the maximum extent, the repair period is shortened, and the ore storage capacity of the chute is effectively increased.

[0064] The above description is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the concept and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for repairing and reinforcing a metal mine ore pass, characterized by: It comprises the following steps, Step one, build a head sheave platform (11) on the ore unloading platform (12) of the main chute (1) ore unloading port; Step two, fill the main chute (1) with ore (14) to a distance of 4m to 8m from the ore unloading port of the main chute (1); Step three, use the head sheave platform (11) to hoist the hanging plate (13) into the main chute (1), and let the bottom of the hanging plate (13) contact the ore (14) in the main chute (1); Step four, while keeping the bottom of the hanging plate (13) in contact with the ore (14) in the main chute (1), the filled ore (14) is discharged at the bottom of the main chute (1), and when the ore surface of the ore (14) is in the collapse area of the main chute (1), the discharge of the ore (14) in the main chute (1) is stopped; Step five, build a workbench; Step six, on the workbench, spray and anchor support for the collapse area of the main chute (1); Step seven, concrete pouring and support frame construction for the collapse area where the spray and anchor support is completed; Step eight, repeat steps four to seven until the collapse area of the main chute (1) is completely repaired and reinforced.

2. The method for repairing and reinforcing the ore pass of a metal mine according to claim 1, characterized in that: The spray and anchor support method comprises the following steps: after cleaning the loose rocks in the collapse area of the main chute (1), high-pressure spraying the first layer of cement concrete on the collapse area of the main chute (1), then driving multiple anchor rods (2) into the rock stratum of the collapse area of the main chute (1), fixing and laying steel mesh on the anchor rods (2), and then high-pressure spraying the second layer of cement concrete on the collapse area of the main chute (1).

3. The method for repairing and reinforcing the ore pass of a metal mine according to claim 2, characterized in that: The thickness of the first layer of cement concrete ranges from 20mm to 40mm, and the thickness of the second layer of cement concrete ranges from 90mm to 110mm.

4. The method for repairing and reinforcing the ore pass of a metal mine according to claim 2, characterized in that: The step seven specifically comprises the following steps: along the depth direction of the main chute (1), the collapse area of the main chute (1) is sequentially divided into an upper pouring section (3), a support and reinforcement section, and a lower pouring section (7), the upper pouring section (3) and the lower pouring section (7) are poured with concrete, and the support and reinforcement section is reinforced with a support frame (5).

5. The method for repairing and reinforcing the ore pass of a metal mine according to claim 4, characterized in that: The concrete pouring structure of the upper pouring section (3) and the lower pouring section (7) is plain concrete, and the concrete strength grade of the plain concrete is C30.

6. The method for repairing and reinforcing the ore pass of a metal mine according to claim 4, characterized in that: The concrete pouring method comprises the following steps: when the rocks in the collapse area of the main chute (1) have developed joint fissures and / or cracks and / or faults, the entire upper pouring section (3) and the entire lower pouring section (7) are poured with concrete; when the rocks in the collapse area of the main chute (1) do not have developed joint fissures and / or cracks and / or faults, a multi-faced 4m thick concrete retaining wall is built on the entire rock wall of the upper pouring section (3) and the entire rock wall of the lower pouring section (7).

7. The method for repairing and reinforcing ore pass of a metal mine according to claim 4, characterized in that: The support frame (5) comprises a plurality of I-beams (8) and a plurality of threaded steel bars (9), the plurality of I-beams (8) are arranged in multiple rows and multiple columns, the end faces of the two ends of each I-beam (8) are respectively abutted against the rock wall of the collapse area of the main chute (1), the two ends of each I-beam (8) are respectively welded with at least one anchor rod (2), and each two adjacent I-beams (8) are fixedly connected through a threaded steel bar (9), and the two ends of the threaded steel bar (9) are respectively welded with the two adjacent I-beams (8).

8. The method for repairing and reinforcing ore pass of a metal mine according to claim 4, characterized in that: The step seven further comprises fixing a plurality of retaining walls (4) on the rock wall of the support reinforcement section, and each retaining wall (4) is fixedly connected with at least one anchor rod (2).

9. The method for repairing and reinforcing ore pass of a metal mine according to claim 1, characterized in that: The method further comprises a step nine, and the step nine specifically comprises: after the collapse area in the main chute (1) is completely repaired and reinforced, the hanging plate (13) is removed.

10. The method for repairing and reinforcing ore pass of a metal mine according to claim 9, characterized in that: The method for removing the hanging plate (13) specifically comprises: lifting the hanging plate (13) to the sealing plate at the well mouth of the main chute (1) and removing the sealing plate; then putting ore (14) into the main chute (1) through the upper branch chute (15), stacking the ore (14) to the lower opening position of the lower branch chute (16), lowering the hanging plate (13) to the ore (14), and then removing the hanging plate (13).

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