Shaft Shaft Sealing Method

Abstract

The present invention relates to the technical field of shaft sealing, and specifically designs a method for sealing a vertical shaft, including: arranging a lower bracket and an upper bracket on the shaft wall, installing a first disc frame on the lower bracket, and fixedly suspending a steel wire rope on the first disc frame for connecting cables, safety ladders, drain pipes, and water supply pipes; installing a second disc frame on the upper bracket and installing a second backing plate; installing a third disc frame on the concrete shaft collar at the wellhead, installing a manual hoist at the position corresponding to the cage guide rope of the original cage on the third disc frame, connecting and fixing the guide rope to the hook of the manual hoist, and adjusting the manual hoist to tighten the guide rope; arranging a hoist at the position where a lifting container is required, connecting the lifting end of the lifting steel wire rope on the hoist to a new cage, and slidingly connecting the new cage to the guide rope; through the present invention, it can not only play a role in shaft sealing, but also provide a slideway for the new cage underground, without affecting the use of the underground lifting container, and at the same time, without affecting the material transportation, water supply, and drainage in the well.

Description

Technical Field

[0001] The present invention relates to the technical field of shaft sealing, and particularly to a method for sealing a vertical shaft. Background Art

[0002] Currently, when underground operations are completed and surface engineering operations need to be carried out, the shaft is usually sealed. The existing shaft sealing method is as follows: First, the derrick, winding engine, and the original wire rope cage guide system installed in the shaft are removed. Then, anchor bolts are drilled on the shaft wall and brackets are installed. Then, the closing disk steel beams are installed on the brackets, and then wooden boards and sand are laid on the closing disk steel beams, which can not only prevent objects from falling into the shaft but also play a role in buffering falling objects and fire prevention.

[0003] However, in recent years, with the rapid development of mine construction, the total construction period requirement of the mine is becoming increasingly tight. It is necessary to synchronously carry out surface engineering construction when the underground mine construction project is in the late stage but not completely finished, that is, when the underground roadway project is coming to an end. After the existing shaft sealing method seals the shaft, the drain pipe, feeding pipe, and compressed air pipe are sealed and cannot be used. At the same time, the wire rope cage guide system has been removed, and material and personnel transportation operations cannot be carried out in the sealed shaft, which cannot meet the construction requirements. Therefore, it is particularly important to design and install a sealing method that can simultaneously meet the surface engineering construction above the wellhead and near the shaft and the underground roadway project construction. Summary of the Invention

[0004] The present invention aims to solve the above problems, and thus provides a method for sealing a vertical shaft that can meet the requirements of both surface engineering and underground roadway engineering.

[0005] The technical solution adopted by the present invention to solve the above problems is as follows:

[0006] A method for sealing a vertical shaft includes the following steps:

[0007] S1: Use the original cage to build a temporary working platform, install anchor bolts on the shaft wall through the temporary working platform. The anchor bolts are arranged in upper and lower layers, and lower brackets and upper brackets are installed on the two layers of anchor bolts respectively. After installation, the temporary working platform is removed;

[0008] S2: Install a first disk frame on the lower bracket, fix a number of suspension wire ropes on the first disk frame, connect the original cables, safety ladders, drain pipes, and water supply pipes in the shaft to the suspension wire ropes, install a first backing plate on the first disk frame, and a number of first through holes are provided on the first backing plate for the drain pipe, water supply pipe, feeding pipe, and compressed air pipe to pass through respectively;

[0009] S3: Install a second disk frame on the upper bracket, install a second backing plate on the second disk frame, and a number of second through holes are provided on the second backing plate for the drain pipe, water supply pipe, feeding pipe, and compressed air pipe to pass through respectively;

[0010] S4: Install a third bracket on the wellhead concrete ring, install a hand chain hoist on the third bracket at the position of the tankway rope corresponding to the original tank cage, and connect and fix the tankway rope to the hook of the hand chain hoist;

[0011] S5: Remove the well drilling frame, adjust the hand chain hoist to tighten the tank rope, and lower the tank rope removed from the well drilling stabilizing vehicle onto the second pad;

[0012] S6: A lifting mechanism is provided at a position where a lifting container is required, and the lifting mechanism includes a hoist arranged in the tunnel, a lifting wire rope is wound on the hoist, a load-bearing steel beam is provided on the lower side of the first disk frame in the shaft, a guide wheel is provided on the load-bearing steel beam, the lifting end of the lifting wire rope passes around the guide wheel and is connected to the new tank cage, and the new tank cage is slidably connected to the tankway rope.

[0013] The steps of setting up a temporary working platform using the original tank cage include: lowering the original tank cage to the construction position below the wellhead, installing a platform frame on the top of the original tank cage, laying scaffolding on the platform frame, welding a connecting beam on the platform frame perpendicular to the platform frame, and connecting and fixing the connecting beam to the wellhead locking plate.

[0014] A sand layer is laid on the second pad, the thickness of the sand layer is greater than or equal to 50 mm, and a fire blanket is laid on the sand layer; the sand layer can buffer falling objects, and the fire blanket can prevent sand from contaminating the steel wire rope placed thereon.

[0015] The installation process of the first disk rack in step S2 includes: using a truck crane to hang the first main beam onto the lower bracket, at least three first main beams are provided, the truck crane is used to hang the hanging basket, the construction personnel are lowered to the working height, the first main beam is aligned, the first main beam is welded and fixed to the lower bracket, the first main beams are connected and fixed to each other using a first connecting beam, the first auxiliary beams are welded to the leftmost and rightmost first main beams, and the other end of the first auxiliary beam is welded and fixed to the lower bracket;

[0016] The installation process of the second disk rack in step S3 includes: hanging the second main beam on the upper bracket, setting at least three second main beams, completing the alignment of the second main beam, welding and fixing the second main beam to the upper bracket, connecting and fixing the second main beams with the second connecting beam, welding the second secondary beams on the leftmost and rightmost second main beams, and welding the other end of the second secondary beam to the upper bracket;

[0017] The installation process of the third frame in step S4 includes: using the second frame and the second pad as the construction platform of the third frame, fixing the third main beam on the concrete well ring of the wellhead, setting at least two third main beams, and connecting and fixing the third main beams with the third connecting beam.

[0018] The gaps between the drain pipe, water supply pipe, material supply pipe, compressed air pipe and the first through-hole and the second through-hole are tightly sealed with canvas; avoid the shaking of the pipes, which may affect the stability of the lower closed disk and the middle closed disk, and prevent small sundries from falling through the gaps and injuring the underground construction workers.

[0019] The present invention adopting the above technical solution, compared with the prior art, its prominent features are:

[0020] The cage ropes of the old cage are fixed by the third disk frame to provide a slideway for the new cage; the second disk frame and the second backing plate can not only prevent falling objects from high altitude, but also be used to hold the surplus cage ropes and hanging steel wires; the hanging steel wires are fixed by the first disk frame, and the hanging steel wires bear the weights of the drain pipe, water supply pipe, cable and safety ladder. After the shaft is closed, the cage ropes, drain pipe, water supply pipe, cable and safety ladder can still be used. At the same time, the first backing plate can play a secondary protection role to prevent falling objects from breaking through the second backing plate; the first through-hole and the second through-hole are used to fix the water supply pipe, drain pipe, material supply pipe and compressed air pipe; through the present invention, it can not only play the role of shaft closure, but also provide a slideway for the new cage underground, without affecting the use of the underground hoisting container, and at the same time, without affecting the material transportation, water supply and drainage in the shaft, and can meet the requirements of the increasingly tight mine construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram when the shaft closure disk structure in the embodiment of the present invention is in use;

[0022] Figure 2 It is a schematic structural diagram of the shaft closure disk structure in the embodiment of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the upper closed disk in the embodiment of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the middle closed disk in the embodiment of the present invention;

[0025] Figure 5 It is a schematic structural diagram of the lower closed disk in the embodiment of the present invention;

[0026] Figure 6 It is a schematic structural diagram of the temporary construction platform in the embodiment of the present invention;

[0027] Figure 7 It is a schematic top view structural diagram of the temporary construction platform in the embodiment of the present invention.

[0028] In the figure: 1, shaft; 101, wellhead concrete ring; 2, upper closing plate; 201, third main beam; 202, third connecting beam; 3, middle closing plate; 301, second main beam; 302, second connecting beam; 303, second auxiliary beam; 304, second pad; 4, middle closing plate; 401, first main beam; 402, first connecting beam; 403, first auxiliary beam; 404, first pad; 5, first rope buckle; 6, hanging wire rope; 7 , hand hoist; 8, second rope buckle; 9, tank rope; 1001, original tank cage; 1002, new tank cage; 11, hoist; 12, guide wheel; 13, lifting wire rope; 14, anchor rod; 1501, lower bracket; 1502, upper bracket; 16, wire rope clamp; 17, drain pipe; 18, feed pipe; 19, compressed air pipe; 2001, first through hole; 2002, second through hole; 21, temporary working platform; 22, connecting beam. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0030] like Figures 1 to 7 As shown, this embodiment provides a method for closing a vertical shaft, including an original cage 1001 and a new cage 1002. The lifting mechanism of the original cage 1001 is arranged above the shaft. After the shaft 1 is closed, the original cage 1001 is no longer used. The lifting mechanism of the new cage 1002 is arranged below the shaft and is used after the shaft 1 is closed. The specific construction method is as follows:

[0031] S1: Use the original tank cage 1001 to set up a temporary working platform 21, drill holes on the well wall through the temporary working platform 21, inject anchor rods 14 into the holes, and arrange the anchor rods 14 in two layers, respectively install the lower bracket 1501 and the upper bracket 1502 on the two layers of anchor rods 14. After the installation is completed, remove the temporary working platform 21, remove the wellhead locking plate, and lift the original tank cage 1001 above the wellhead;

[0032] The steps of the temporary working platform 21 include: after the mine construction unit hands over the well, the original cage 1001 is lowered to the construction position below the wellhead, the platform frame is installed on the top of the original cage 1001, the scaffolding is laid on the platform frame, and the connecting beam 22 is welded perpendicular to the platform frame on the platform frame, and the connecting beam 22 is connected and fixed to the wellhead locking plate; wherein, the platform frame is made of 20#a channel steel by welding, the connecting beam 22 is made of 12# channel steel, and the scaffolding thickness is 50mm.

[0033] S2: Install the first tray on the lower bracket 1501. Fix a number of first rope buckles 5 on the first tray. A suspension steel wire rope 6 is connected to the lower end of each first rope buckle 5. The suspension steel wire rope 6 is fixed to the first rope buckle 5 using a wire rope clip 16. Connect the original cables, safety ladders, drain pipes 17, and water supply pipes in the shaft 1 to the suspension steel wire rope 6. Install a first backing plate 404 on the first tray. A number of first through holes 2001 are provided on the first backing plate 404. The drain pipe 17, water supply pipe, material supply pipe 18, and compressed air pipe 19 pass through the corresponding first through holes 2001. The first tray and the first backing plate 404 are used as the lower closed tray 4.

[0034] The installation process of the first tray includes: Use a 25t truck crane to lift and place the first main beam 401 onto the lower bracket 1501. At least three first main beams 401 are provided. Use the truck crane to hold the hanging basket and lower the construction workers to the working height. Complete the alignment of the first main beam 401. Weld and fix the first main beam 401 to the lower bracket 1501. Connect and fix the first main beams 401 to each other using the first connecting beam 402. The first auxiliary beams 403 are welded to the leftmost and rightmost first main beams 401, and the other ends of the first auxiliary beams 403 are welded and fixed to the lower bracket 1501. The first connecting beam 402 and the first auxiliary beam 403 are both perpendicular to the first main beam 401.

[0035] S3: Install the second tray on the upper bracket 1502. Install a second backing plate 304 on the second tray. A number of second through holes 2002 are provided on the second backing plate 304 for the drain pipe 17, water supply pipe, material supply pipe 18, and compressed air pipe 19 to pass through respectively. The second tray and the second backing plate 304 are used as the middle closed tray 3. The gaps between the drain pipe 17, water supply pipe, material supply pipe 18, compressed air pipe 19 and the first through holes 2001, second through holes 2002 are tightly plugged with canvas.

[0036] The installation process of the second tray includes: Lift and place the second main beam 301 onto the upper bracket 1502. At least three second main beams 301 are provided. Complete the alignment of the second main beam 301. Weld and fix the second main beam 301 to the upper bracket 1502. Connect and fix the second main beams 301 to each other using the second connecting beam 302. The second auxiliary beams 303 are welded to the leftmost and rightmost second main beams 301, and the other ends of the second auxiliary beams 303 are welded and fixed to the upper bracket 1502. The second connecting beam 302 and the second auxiliary beam 303 are both perpendicular to the second main beam 301.

[0037] Among them, the first backing plate 404 and the second backing plate 304 are made of 50mm thick diamond plate. A sand layer is laid on the second backing plate 304, and the laying thickness of the sand layer is not less than 50mm. A fireproof blanket is laid on the sand layer to prevent the sand from contaminating the steel wire rope.

[0038] S4: Install the third tray on the concrete well ring 101 at the wellhead. Install a chain hoist 7 at the position corresponding to the cage rope 9 of the original cage 1001 on the third tray. A second rope buckle 8 is installed on the hook of each chain hoist 7. Fix the cage rope 9 of the original cage 1001 to the second rope buckle 8 through a wire rope clip 16. The third tray is used as the upper closed tray 2.

[0039] The installation process of the third tray includes: Using the middle closed tray 3 as the construction platform for the upper closed tray 2, fix the third main beam 201 on the concrete well ring 101 at the wellhead. At least two third main beams 201 are provided, and the third main beams 201 are connected and fixed to each other using a third connecting beam 202.

[0040] When the diameter of the shaft 1 is 5.2 m, the first main beam 401 is made of 40#a I-beam, the first connecting beam 402, the first secondary beam 403, and the second main beam 301 are made of 25#a I-beam, the second connecting beam 302 and the second secondary beam 303 are made of 20#a I-beam, the third main beam 201 is made of I32a I-beam, and the third connecting beam 202 is made of 12# channel steel.

[0041] S5: Demolish the sinking derrick, adjust the chain hoist 7 to tighten the cage rope 9, and lower the cage rope 9 unloaded from the sinking winch to the second backing plate 304. To prevent the wire ropes from being messy and difficult to identify, make marks at the head of each cage rope 9.

[0042] S6: A hoisting mechanism is provided at the position where the hoisting container needs to be used. The hoisting mechanism includes a hoist 11 arranged in the roadway. A hoisting wire rope 13 is wound around the hoist 11. A load-bearing steel beam is provided below the first tray in the shaft 1, and a guide wheel 12 is provided on the load-bearing steel beam. The hoisting end of the hoisting wire rope 13 bypasses the guide wheel 12 and is connected to the new cage 1002. The hoisting wire rope 13 is located at the central axis of the four cage ropes 9. The new cage 1002 is slidably connected to the cage ropes 9. The hoisting wire rope 13 controls the ascending and descending of the new cage 1002. The new cage 1002 slides up and down along the cage ropes 9 without swinging and rotating.

[0043] Furthermore, the distance between the lower closed tray 4 and the middle closed tray 3 is 2 m - 2.5 m, and the distance between the middle closed tray 3 and the upper closed tray 2 is 3 m - 3.5 m. When the diameter of the shaft 1 is 5.2 m, the distance between the lower closed tray 4 and the middle closed tray 3 is 2.05 m, and the distance between the middle closed tray 3 and the upper closed tray 2 is 3 m.

[0044] With this shaft closing disk structure, the suspension steel wires of the lower closing disk are used to fix cables, safety ladders, drain pipes, and water supply pipes. The middle closing disk is used for coiling the redundant cage guides and suspension steel wires and for protecting the shaft. The upper closing disk is used for tightening the cage guides and providing a slideway for the new cage to prevent rotation and shaking when the new cage slides. The present invention ensures that while being closed, the hoisting, power supply, and drainage systems can still be used inside the shaft, without affecting the construction of surface projects and underground roadway projects. After the surface building reaches the predetermined construction height, it is convenient to quickly restore the ground hoisting system (the use of the original cage) to achieve shaft ground hoisting.

[0045] The above are only the preferred and feasible embodiments of the present invention, and thus do not limit the scope of the rights of the present invention. Any equivalent changes made by using the content of the specification and drawings of the present invention are included within the scope of the rights of the present invention.

Claims

1. A method for closing a shaft shaft, characterized in that, The steps include: S1: Use the original cage to build a temporary working platform, install anchor rods on the well wall through the temporary working platform, the anchor rods are arranged in two layers, the lower bracket and the upper bracket are installed on the two layers of anchor rods respectively, and the temporary working platform is removed after the installation is completed; S2: Install a first disc frame on the lower bracket, fix a plurality of suspension wire ropes on the first disc frame, connect the original cables, safety ladders, drainage pipes, and water supply pipes in the wellbore to the suspension wire ropes, and install a first pad on the first disc frame. The first pad is provided with a plurality of first through holes for the drainage pipe, water supply pipe, feed pipe, and compressed air pipe to pass through respectively; S3: Install a second disc rack on the upper bracket, install a second pad on the second disc rack, and set a plurality of second through holes on the second pad for the drainage pipe, the water supply pipe, the feed pipe, and the compressed air pipe to pass through respectively; S4: Install a third bracket on the wellhead concrete ring, install a hand chain hoist on the third bracket at the position of the tankway rope corresponding to the original tank cage, and connect and fix the tankway rope to the hook of the hand chain hoist; S5: Remove the well drilling frame, adjust the hand chain hoist to tighten the tank rope, and lower the tank rope removed from the well drilling stabilizing vehicle onto the second pad; S6: A lifting mechanism is provided at a position where a lifting container is required, and the lifting mechanism includes a hoist arranged in the tunnel, a lifting wire rope is wound on the hoist, a load-bearing steel beam is provided on the lower side of the first disk frame in the shaft, a guide wheel is provided on the load-bearing steel beam, the lifting end of the lifting wire rope passes around the guide wheel and is connected to the new tank cage, and the new tank cage is slidably connected to the tankway rope.

2. The shaft wellbore closing method according to claim 1, wherein, The steps of setting up a temporary working platform using the original tank cage include: lowering the original tank cage to the construction position below the wellhead, installing a platform frame on the top of the original tank cage, laying scaffolding on the platform frame, welding a connecting beam on the platform frame perpendicular to the platform frame, and connecting and fixing the connecting beam to the wellhead locking plate.

3. The shaft wellbore closing method according to claim 1, wherein: A sand layer is laid on the second pad, the thickness of the sand layer is greater than or equal to 50 mm, and a fire blanket is laid on the sand layer.

4. The shaft wellbore closing method according to claim 1, characterized in that, The installation process of the first disk rack in step S2 includes: using a truck crane to hang the first main beam onto the lower bracket, at least three first main beams are provided, the truck crane is used to hang the hanging basket, the construction personnel are lowered to the working height, the first main beam is aligned, the first main beam is welded and fixed to the lower bracket, the first main beams are connected and fixed to each other using a first connecting beam, the first auxiliary beams are welded to the leftmost and rightmost first main beams, and the other end of the first auxiliary beam is welded and fixed to the lower bracket; The installation process of the second disk rack in step S3 includes: hanging the second main beam on the upper bracket, setting at least three second main beams, completing the alignment of the second main beam, welding and fixing the second main beam to the upper bracket, connecting and fixing the second main beams with the second connecting beam, welding the second secondary beams on the leftmost and rightmost second main beams, and welding the other end of the second secondary beam to the upper bracket; The installation process of the third frame in step S4 includes: using the second frame and the second pad as the construction platform of the third frame, fixing the third main beam on the concrete well ring of the wellhead, setting at least two third main beams, and connecting and fixing the third main beams with the third connecting beam.

5. The shaft wellbore closing method according to claim 1, characterized in that: The gaps between the drain pipe, water supply pipe, material supply pipe, air pressure pipe and the first through-hole and the second through-hole are tightly plugged with canvas.

Images