Optimized blind-lift well construction method

Abstract

The application discloses an optimized blind shaft construction method, which comprises the following steps: constructing partial permanent engineering and sinking engineering to form a sinking condition; constructing a shaft and a mine delivery system; completing shaft equipment, mine delivery system and lifting system installation to form lifting capacity. The application performs sinking operation through permanent lifting equipment and facilities, reduces conversion time of conventional sinking hoist, sheave and ore bin and permanent hoist, sheave and ore bin, saves construction period, and realizes multi-section synchronous feeding through segmented 'waterfall type' delivery shaft system and seat type vibration ore feeder control, solves the problem that part of branch delivery shafts cannot be used due to full bin of the main delivery shaft during conventional main delivery shaft and branch delivery shaft mine delivery, improves the lifting efficiency of the blind main shaft, and is convenient for later production organization.

Description

Technical Field

[0001] This invention relates to a method for constructing blind lifting wells. Background Technology

[0002] For the construction of blind hoisting shafts, the large scale of the ore pass system, the low temporary hoisting capacity during shaft sinking, and the inability to utilize sinking measures as permanent works have resulted in slow construction progress and significant investment in engineering and equipment. For example, a blind shaft has a net cross-section of φ8.5m, supported by C30 concrete with a thickness of 350mm; the elevation of the sheave chamber floor is -540m, the elevation of the shaft head gate floor is -590m, the bottom elevation is -1390m, and the total shaft length is 850m; there is a hoisting chamber on each side of the shaft head, and each chamber has a 4m×5m×20m unloading ore bin; there is a segmented "waterfall-style" side ore pass on each side of the shaft, with unloading stations at elevations of -1130m and -1130m respectively. The ore is gradually lowered to the -1355m ore and waste rock bin via the -1220m and -1310m conveyor belts. It then enters the metering funnel via the conveyor belt (bottom elevation is -1355m) and is lifted to the -600m mid-section before entering the main mine transportation system. The shaft is equipped with two hoisting systems, with hoist model 2JK-4×2.1 / 11.5, using wire rope guides, and double skips for counterweight. The skip volume is 4m³, and the shaft has a hoisting capacity of 6000t / d after completion.

[0003] The existing blind hoisting shaft construction method generally involves first constructing the shaft and ore chute system using temporary works such as the shaft sinking hoist chamber, shaft sinking ropeway, shaft sinking sheave chamber, shaft sinking stabilization chamber, shaft sinking cap, and shaft sinking waste chute. After completion, these temporary works are then converted into permanent structures for installation. This method, which involves constructing the shaft and ore chute system through temporary works, then converting them into permanent structures, and finally installing the shaft equipment, ore chute system, and hoisting system, has the following main disadvantages: First, the temporary and permanent works are constructed independently and cannot be used interchangeably, increasing the amount of excavation and construction work; second, the shaft sinking hoist and permanent hoist are of different models, increasing equipment and facility costs; and third, the conversion of temporary works into permanent structures results in a long construction period. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an optimized construction method for blind hoisting wells, which reduces the modification time for the transition of the later hoisting measures to the permanent works by organically combining the permanent hoisting facilities and the well sinking hoisting facilities, improves the construction efficiency of blind hoisting wells, and improves the material feeding efficiency of the chute by setting up segmented "waterfall-type" chutes.

[0005] The technical solution of the present invention is as follows: The optimized method for constructing blind lifting wells includes the following steps: S1. Construction of permanent works and well-drilling measures to create conditions for well drilling; S2. Carry out the construction of the shaft and ore chute system; S3. Complete the installation of shaft equipment, ore chute system and hoisting system to form hoisting capacity.

[0006] Preferably, step S1 consists of the following steps: S11, Construction includes hoist chambers on both sides, ropeways on both sides, sheave chamber, shaft cap, unloading chambers on both sides, unloading ore bins on both sides, ore discharge chambers on both sides, and shaft sinking and stabilizing machine group chambers on both sides; S12. Install a double-drum hoist with single rope winding on both sides, double sheaves on both sides, a shaft sinking stabilizing car on both sides, a shaft sinking and turning platform, a shaft sinking sealing plate, a shaft sinking lifting plate, a vibrating ore discharge machine with double platform on both sides, and match it with rail mine cars and trackless trucks. S13. Using a single-layer winding double-drum hoist on both sides, install a sheave on one drum and a shaft sinking wire rope, and install buckets on both sides to form a double-bucket shaft sinking and hoisting condition.

[0007] Preferably, the specific steps of S2 are as follows: The construction of the shaft, skip loading chambers on both sides, belt conveyors on both sides, ore and waste rock bins and crushing chambers on both sides, lower ore chutes and lower crushing chambers on both sides, and upper ore chutes and upper crushing chambers on both sides will be carried out in sequence to complete the excavation and masonry work.

[0008] Preferably, step S3 is as follows: S31. Convert the well drilling platform into a working platform; S32. Install fixed crushers for the upper and lower sections and the crushing chambers of the mine and waste rock bins on both sides, seated vibrating feeders at the bottom of the upper and lower section chutes, and suspended vibrating feeders at the bottom of the mine and waste rock bins. S33. Install the belt conveyors on both sides, the three-way distributor, and the metering funnel; S34. Install the bottom rope tensioner beam, the guide rope tensioning device, the bottom tank retaining beam, and the bottom tank guide; S35. Remove the well sinking sealing plate and well sinking overturning platform, and install the hydraulic cylinder mounting beam, spare tensioner mounting beam, well surface tank guard beam, tank guide rope tensioning device, wedge-shaped tank guide, unloading curved rails on both sides and unloading chute. S36. Remove the well sinking stabilizer, well sinking wire rope and well sinking bucket; S37. Install the guide rope, and install the lifting rope and skip of the double drum hoist on both sides with single rope winding. The hoist on both sides forms a double skip hoisting system that balances each other, forming a four-skip hoisting capacity.

[0009] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This invention changes the conventional multi-rope friction hoisting method of blind hoisting shafts, adopting a double-drum hoisting method with single-rope winding on both sides. It utilizes permanent hoisting equipment for shaft sinking operations, reducing the conversion time between conventional shaft sinking hoists, sheaves, and ore bins and permanent hoists, sheaves, and ore bins, thus saving construction time. Simultaneously, the segmented "waterfall-style" ore pass system, equipped with a vibratory ore feeder control, enables simultaneous feeding across multiple sections. This solves the problem of lower branch ore passes being unusable when the main ore pass is full when coordinating with branch ore passes in conventional main ore pass operations, improving the hoisting efficiency of blind hoisting shafts and facilitating subsequent production organization. Attached Figure Description

[0010] Figure 1 This is a diagram of the hoisting system during the drilling phase of a blind hoisting well, as described in an embodiment of the present invention. Figure 1 The center height of the central wheel is +50.00m, and the bottom elevation is -1390m.

[0011] Figure 2 This is a top view of the blind hoisting well during the drilling phase of an embodiment of the present invention; Figure 3 This is a cross-sectional view of the upper stabilization chamber during the drilling phase of a blind hoisting well, according to an embodiment of the present invention. Figure 3 At the same time as Figure 2 AA section view; Figure 4 This is a cross-sectional view of the wellbore during the production period of a blind hoisting well according to an embodiment of the present invention. Figure 4 At the same time as Figure 5 BB cross-sectional view; Figure 5 This is a diagram of the blind lifting well production period lifting system according to an embodiment of the present invention. Figure 5 The absolute elevation of the wellhead is -590m, which serves as the relative elevation of the well cap section at +0.00m. The relative elevation of the sheave center is +50.00m. The absolute elevation of the well bottom is -1390m. The relative elevation of the bottom of the hydraulic cylinder mounting beam is +44.195m. The relative elevation of the bottom of the spare tensioner mounting beam is +41.695m. The absolute elevation of the top of the bottom tensioner mounting beam is -1379.38m. The relative elevation of the bottom surface of the wellhead baffle beam is +39.195m. The absolute elevation of the top surface of the baffle beam is... Elevation -1376.38m, relative elevation of the starting point (upper) of the wedge section +31.05m, absolute elevation of the starting point (lower) of the wedge section -1367.18m, relative elevation of the bottom elevation of the skip unloading point +24.55m, absolute elevation of the bottom frame of the skip loading point -1366.38m, relative elevation of the bottom frame of the unloading curved track +19.125m, relative elevation of the starting point (upper) of the tank stabilizing track +14.04m, absolute elevation of the starting point (lower) of the tank stabilizing track -1355m.

[0012] In the diagram, 1-Hoisting chamber, 2-Ropeway, 3-Head sheave chamber, 4-Hole cap, 5-Unloading chamber, 6-Unloading ore bin, 7-Ore discharge chamber, 8-Stabilizing car group chamber, 9-Single-rope winding double-drum hoist, 10-Head sheave, 11-Sinking stabilizing car, 12-Sinking waste dumping platform, 13-Sinking sealing plate, 14-Sinking hoisting platform, 15-Double-platform vibrating ore discharger, 16-Rail-guided mine car, 17-Trackless truck, 18-Sinking wire rope, 19-Hoisting bucket, 20-Shaft, 21-Skip loading chamber, 22-Belt conveyor, 23-Ore and waste rock bin, 24-Ore and waste rock bin crushing chamber, 25-Lower section 26-Lower crushing chamber, 27-Upper ore pass, 28-Upper crushing chamber, 29-Fixed crusher, 30-Sitting vibrating ore feeder, 31-Suspended vibrating ore feeder, 32-Belt conveyor, 33-Three-way feeder, 34-Metering funnel, 35-Bottom rope tensioner mounting beam, 36-Tractor rope tensioning device, 37-Bottom trap beam, 38-Bottom trap passage, 39-Hydraulic cylinder mounting beam, 40-Spare rope tensioner mounting beam, 41-Upstream trap beam, 42-Wedge trap passage, 43-Unloading curved track, 44-Unloading chute, 45-Tractor rope, 46-Hoisting rope, 47-Tilting skip. Detailed Implementation

[0013] The method of the present invention will be further described below with reference to specific embodiments.

[0014] The method of the present invention includes the following general steps: S1. Construction of permanent works and well-drilling measures to create conditions for well drilling; S2. Carry out the construction of the shaft and ore chute system; S3. Complete the installation of shaft equipment, ore chute system and hoisting system to form hoisting capacity.

[0015] The following are specific construction method embodiments of the overall steps of this invention: S1. Construction of permanent works and well-drilling measures to create the conditions for well drilling. This includes the following specific steps: S11, Construction Route A: Construct hoist chamber 1 located on both sides of the shaft in the -600m middle section; construct ropeways 2 on both sides of the shaft connecting hoist chamber 1 and the -540m sheave chamber 3 via hoist chamber 1, and then construct the -540m middle section sheave chamber 3 via ropeways 2; Construction Route B: Construct ore discharge chambers 7 on both sides of the shaft in the -600m middle section; construct unloading ore bins 6 on both sides connecting the ore discharge chamber and the unloading chamber via the ore discharge chamber; finally construct unloading chambers 5 on both sides of the shaft; Construction Route C: Construct the -600m to -540m shaft cap 4 connecting the shaft opening to the sheave platform in the -600m middle section; construct the shaft sinking and stabilizing machine group chambers 8 on the other two sides of the -540m middle section shaft via the shaft cap; S12. Construction Route A: Install the 2JK-4x2.1 / 11.5 single-rope winding double-drum hoist 9 located in the hoist chamber 1; Construction Route B: First install the sinking stabilizer 11 located in the stabilizer chamber 8, then install the ∅3500mm double sheaves 10 located on both sides of the sheave chamber 3, and finally install the sinking and overturning platform 12 located in the unloading chamber 5; Construction Route C: First install the sinking hoist 14 located in the shaft 20, and after the shaft is constructed for 30m, install the sinking sealing plate 13 located at the shaft opening; Construction Route D: First install the FZC-4.5 / 1.2x2-10x2 double-platform vibratory ore feeder 15 located in the ore discharge chamber 7, and then install the matching 6m... 3 16-ton rail-mounted mining carts and 17-ton 15-ton trackless trucks; S13. Using one drum of a double-drum hoist with single-rope winding on both sides, and equipped with a sheave, install an 18×7-46-1960 well-drilling steel wire rope (18m) on both sides, with a length of 4m on each side. 3 Bucket 19, forming the conditions for double-bucket well drilling and hoisting.

[0016] S2. Carry out the construction of the shaft and ore chute system, including the following specific steps: The construction proceeds in the following order: shaft 20 is constructed, followed by the construction of the skip loading chamber 21 located on both sides of the shaft after reaching the middle section of the conveyor belt at -1355m. Then, the conveyor belt 22 connecting the skip loading chamber and the mine and waste rock bin 23 is constructed. The mine and waste rock bin 23 and the mine and waste rock bin crushing chamber 24 located above it are constructed. The lower section chute 25 located above the crushing chamber and the lower section crushing chamber 26 located above it are constructed. The upper section chute 27 located above the lower section crushing chamber and the upper section crushing chamber 28 located above it are constructed, thus completing the excavation and lining work.

[0017] S3. Complete the installation of shaft equipment, ore chute system, and hoisting system to establish hoisting capacity. This includes the following specific steps: S31. Modify the well drilling platform 14 into a working platform; S32, Install GTP55Z-2.5 / 2.0 fixed crushing equipment in the upper section, lower section, and ore and waste rock bin crushing chamber 24. Stone machine 29, XZGZ0922L seated vibrating ore feeder 30 at the lower end of the upper and lower chute, and XZG1325L suspended vibrating ore feeder 31 at the lower end of the ore and waste rock bin; S33, Install belt conveyor 32 with B=1.2m and L=31m located on belt conveyor 22, located at the skip loading point. The three-way distributor 33 and 4m in chamber 21 3 Measuring funnel 34; S34. Install the bottom rope tensioner mounting beam at the 20-1379.38m elevation of the shaft. 35. Install the SGY-20 tank guide rope tensioning device on the rope tensioner mounting beam. 36. Install the bottom tank guide beam at the 20-1376.38m elevation of the shaft. 37. Install the bottom tank guide on the upper part of the bottom tank guide beam. 38. Stabilize the tank guide to the starting elevation of the 20-1355m elevation of the shaft. S35. First, remove the well sinking sealing plate 13 and the well sinking overturning platform 12. Then, install the hydraulic cylinder mounting beam 39 at the well cap elevation 4+44.195m, install the spare tensioner mounting beam 40 at the well cap elevation 4+44.695m, install the tank guide rope tensioning device 36 between the hydraulic cylinder mounting beam and the spare tensioner mounting beam, install the well top tank guard beam 41 at the well cap elevation 4+39.195m, install the unloading curved rail 43 and the unloading chute 44 in the unloading chamber 5, and finally install the wedge-shaped tank guide 42 between the well cap elevation +14.04m and the well top tank guard beam. S36. Dismantle the well sinking stabilizer 11, well sinking wire rope 18 and well sinking matching bucket 19; S37. First, install sixteen ∅38 diameter sealed steel wire ropes in the well shaft as guide ropes 45 for the four skips. Then, install four lifting ropes 46 on the two-sided single-rope winding double-drum hoists 9(W)x7(PI)-∅40-1770. Finally, suspend 4m ropes at the ends of the lifting ropes. 3 The tilting skip 47, with two elevators on both sides forming a double skip lifting system that balances each other, creates a four-skip lifting capacity of 6000t / d.

Claims

1. An optimized method for constructing blind lifting wells, characterized by: Well drilling operations using permanent hoisting equipment include the following steps: S1. Construction of permanent works and well-drilling measures to create well-drilling conditions; including the installation of a double-drum hoist with single-rope winding on both sides, using one drum of the hoist with a sheave to install the well-drilling wire rope, and installing buckets on both sides to create double-bucket well-drilling hoisting conditions; the specific steps are as follows: S11, Construction of hoist chambers on both sides (1), ropeways on both sides (2), sheave chamber (3), well cap (4), unloading chambers on both sides (5), unloading ore bins on both sides (6), ore discharge chambers on both sides (7), and shaft sinking and stabilizing group chambers on both sides (8); S12. Install a double-drum hoist with single rope winding on both sides (9), double sheaves on both sides (10), a shaft sinking stabilizing car on both sides (11), a shaft sinking and turning platform (12), a shaft sinking sealing plate (13), a shaft sinking lifting plate (14), a double-platform vibrating ore feeder on both sides (15), and match it with a rail mine car (16) and a trackless truck (17). S13. Use one drum of the double-drum hoist with a sheave to install the well-drilling wire rope (18) and install the buckets on both sides (19) to form the conditions for double-bucket well-drilling hoisting. S2. Construct the shaft and ore chute system; including the construction of a segmented "waterfall-style" side ore chute system, which includes an upper ore chute, a lower ore chute, and ore and waste rock storage. S3. Complete the installation of shaft equipment, ore chute system and hoisting system to form hoisting capacity; among which, remove the shaft sinking stabilizer, shaft sinking wire rope and shaft sinking matching bucket; then install the guide rope, install the hoisting rope of the double drum hoist on both sides and the tilting skip, the hoist on both sides each form a double skip hoisting system that balances each other, forming a four-skip hoisting capacity.

2. The optimized blind lifting well construction method as described in claim 1, characterized in that S2 The specific steps are as follows: Construct the shaft (20), skip loading chambers on both sides (21), belt conveyors on both sides (22), crushing chambers for ore and waste rock on both sides (24), lower chute on both sides (25) and lower crushing chamber (26), upper chute on both sides (27) and upper crushing chamber (28) in sequence to complete the excavation and masonry construction.

3. The optimized blind lifting well construction method as described in claim 1, characterized in that... The specific steps for S3 are as follows: S31. The well sinking hoist (14) is modified into a working platform; S32. Install fixed crushers (29) on the upper and lower sections of both sides and the crushing chamber (24) of the mine and waste rock bin. The seated vibrating ore feeder (30) at the lower end of the upper and lower ore passes and the suspended vibrating ore feeder (31) at the lower end of the ore and waste rock bins. S33. Install the two-sided belt conveyor (32), the three-way distributor (33), and the metering funnel (34). S34. Install the bottom rope tensioner installation beam (35), the guide rope tensioning device (36), the bottom guide beam (37), and the bottom guide (38). S35. Remove the well sinking sealing plate (13) and the well sinking waste rock dumping platform (12), and install the hydraulic cylinder mounting beam. (39) Spare tensioner installation beam (40) Well surface tank baffle beam (41) Tank guide rope tensioning device (36) Wedge-shaped tank guide (42) Unloading curved rails on both sides (43) and unloading chute (44); S36. Remove the well sinking jack (11), well sinking wire rope (18) and well sinking bucket (19). S37. Install the guide rope (45), install the lifting rope (46) of the double drum hoist on both sides and the tilting skip (47), and the hoist on both sides forms a double skip lifting system that balances each other, forming a four-skip lifting capacity.

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