CN110671112A - Integral well-forming type shaft heading machine - Google Patents
Integral well-forming type shaft heading machine Download PDFInfo
- Publication number
- CN110671112A CN110671112A CN201911134183.5A CN201911134183A CN110671112A CN 110671112 A CN110671112 A CN 110671112A CN 201911134183 A CN201911134183 A CN 201911134183A CN 110671112 A CN110671112 A CN 110671112A
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- Prior art keywords
- steel pipe
- ground
- cutter head
- main drive
- flange
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/03—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws
- E21D1/06—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws with shaft-boring cutters
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/03—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/08—Sinking shafts while moving the lining downwards
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/06—Lining shafts; Linings therefor with iron or steel
- E21D5/08—Lining shafts; Linings therefor with iron or steel in the form of profiled parts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/12—Accessories for making shaft linings, e.g. suspended cradles, shutterings
Abstract
The invention provides an integrated shaft boring machine. The underground tunneling machine comprises ground equipment fixed on the ground and an underground main machine tunneled under the ground; the above ground apparatus comprising a support structure frame and a propulsion system; the support structure frame is fixed on the ground plane; the propulsion system is arranged on the support structure frame; the host machine in the well comprises a cutter head, a main drive, a steel pipe ring and a supporting unit; the flange on the cutter head is connected with the flange on the main drive through a high-strength bolt, and the main drive provides torque for the cutter head in the tunneling process; one end of the steel pipe ring is connected with a flange on the main drive; the other end of the steel pipe ring is connected with the supporting unit; the piston rod in the propulsion system is opposite to the area of the support unit. The invention has high mechanization degree of the whole structure and greatly reduces the labor intensity. By adopting the steel pipe sheet for supporting, the device has wide geological adaptability and can be applied to the vertical shaft tunneling of soft soil, gravel, soft rock and hard rock stratums. Collect excavation, slag tap, just prop up in an organic whole, each process seamless connection, the efficiency of construction is fast.
Description
Technical Field
The invention relates to the technical field of shaft construction, in particular to an integral shaft-forming type shaft heading machine.
Background
With the increasing demand of underground engineering, the application range of the vertical shaft is wider and wider. At present, a common shaft sinking method is adopted in the construction of a plurality of vertical shafts, and the method has the advantages of low excavation speed, low mechanization degree, high safety risk of constructors and high construction cost. The vertical shaft tunneling machine is an engineering machine for rapidly tunneling a tunnel, and can realize intelligent and underground unmanned construction.
The invention patent CN108756888A 'A small-diameter hard rock shaft heading machine' discloses a small-diameter hard rock shaft heading machine, which comprises a shaft heading host machine and a derrick arranged on the ground, wherein the shaft heading host machine is connected with the derrick through a lifting mechanism; the power matching device comprises a walking chassis and a slurry treatment station, wherein a slurry pump and a power station are arranged on the upper portion of the walking chassis, and the slurry treatment station is connected with the shaft tunneling host machine through a slurry pipe. The modular design is convenient for the transportation and maintenance of the equipment; the working efficiency of the small-diameter shaft tunneling is greatly improved.
The shaft boring machine propulsion system referred to in the above patent takes the form of a shoe, so that the shaft boring machine is restricted to boring in hard rock formations only. Other related shaft tunneling equipment cannot realize rapid tunneling and lining and disassembly of the equipment after shaft tunneling is finished.
In view of the above, there is a great need for an integrated shaft boring machine to solve the problems of the prior art.
Disclosure of Invention
The invention aims to provide an integral shaft boring machine, which aims to solve the problems of low excavation speed and inconvenient equipment disassembly and assembly of the existing boring machine.
In order to achieve the aim, the invention provides an integral shaft-forming type shaft heading machine which comprises ground equipment fixed on the ground and a shaft main machine heading under the ground; the above ground apparatus comprising a support structure frame and a propulsion system; the support structure frame is fixed on the ground plane; the propulsion system is arranged on the support structure frame;
the host machine in the well comprises a cutter head, a main drive, a steel pipe ring and a supporting unit; the flange on the cutter head is connected with the flange on the main drive through a high-strength bolt, and the main drive provides torque for the cutter head in the tunneling process; one end of the steel pipe ring is connected with a flange on the main drive; the other end of the steel pipe ring is connected with the supporting unit; a piston rod in the propulsion system is opposite to the region of the support unit, and the piston rod in the propulsion system props against the support unit to transmit the thrust to the cutter head.
Preferably, the diameter of the flange of the cutter head is 10-50 mm larger than that of the steel pipe ring; a hinged oil cylinder is fixed on the inner wall of the steel pipe ring; the main drive is provided with a hinge seat; the piston rod of the hinged oil cylinder is matched with the groove of the hinged seat.
Preferably, eight groups of hinged oil cylinders are arranged; eight groups of hinged oil cylinders are uniformly arranged along the circumferential direction of the steel pipe ring, and piston rods of the hinged oil cylinders are inserted into grooves of the hinged seats to fix the main drive and adjust the position of the main drive.
Preferably, the supporting unit is a steel pipe sheet; the steel pipe piece is of an annular structure formed by splicing two pipe pieces with semicircular sections, and the two pipe pieces are connected in a bolt connection mode or a welding mode or a combination mode of bolt connection and welding; the outer diameter of the steel pipe sheet is equal to that of the steel pipe ring.
Preferably, the propulsion system comprises four groups of propulsion oil cylinders which are uniformly distributed along the circumferential direction of the steel pipe sheet.
Preferably, the ground equipment further comprises a supporting and hoisting system, the supporting and hoisting system is installed on the slide rail of the support structure frame, and the supporting and hoisting system is used for hoisting the pipe piece when the steel pipe piece is assembled.
Preferably, the above-ground equipment further comprises a host hoisting system, the host hoisting system is fixed on the ground, a guide pulley block is arranged on the support structure frame, and the free end of the steel strand in the host hoisting system penetrates through the guide pulley block to hoist the host in the well.
Preferably, the above-ground equipment further comprises a muddy water circulation system; the mud-water circulating system comprises a mud-water separating station and a slurry discharging pump; the mud-water separation station is fixedly arranged on the ground; the slurry discharging pump is arranged on a flange of the cutter head; one end of the slurry discharge pipe is connected with the mud-water separation station, and the other end of the slurry discharge pipe is connected with an outlet of the slurry discharge pump; one end of the slurry pumping pipe is connected with the inlet of the slurry discharging pump; one end of the water inlet pipe is connected with the mud-water separation station, and the other end of the water inlet pipe is communicated into the cavity of the cutter head.
The technical scheme of the invention has the following beneficial effects:
(1) the invention has high mechanization degree of the whole structure and greatly reduces the labor intensity. By adopting the steel pipe sheet for supporting, the device has wide geological adaptability and can be applied to the vertical shaft tunneling of soft soil, gravel, soft rock and hard rock stratums.
(2) According to the invention, a conical cutter head is adopted for full-section excavation, slag is discharged through a mud-water circulating system, and the primary support is carried out by adopting spliced steel pipe sheets. Collect excavation, slag tap, just prop up in an organic whole, each process seamless connection, the efficiency of construction is fast.
(3) According to the invention, the host hoisting system is arranged, and the vertical shaft heading machine can be disassembled after the equipment finishes heading, so that the construction cost is greatly reduced. And in the disassembly process, the main drive, the propulsion oil cylinder, the cutter head and the like are sequentially conveyed out through the main machine hoisting system. And the in-situ protective and quick assembly and disassembly are realized. In the case of relatively good geological conditions, the constructor can change the tool downhole.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
figure 1 is a front view of a shaft boring machine;
figure 2 is a side view of a shaft boring machine;
FIG. 3 is a schematic diagram of a downhole host;
the system comprises a supporting structure frame 1, a supporting structure frame 2, a propulsion system 3, a cutter head 4, a main drive 5, a steel pipe ring 6, a steel pipe sheet 7, a supporting and hoisting system 8, a main machine hoisting system 9, a mud-water separation station 10, a slurry discharge pump 11, a slurry discharge pipe 12, a slurry pumping pipe 13, a water inlet pipe 14, a hinged oil cylinder 15, a hinged seat 16 and a guide pulley block.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example 1:
referring to fig. 1 to 3, an integral shaft boring machine comprises an above-ground device fixed on the ground and an in-well main machine for boring under the ground; the ground equipment comprises a support structure frame 1, a propulsion system 2 and a host hoisting system 8; the support structure frame 1 is fixed on the ground plane; the propulsion system 2 is arranged on the support structure frame 1; the main machine hoisting system 8 is fixed on the ground, the support structure frame 1 is provided with a guide pulley block 16, and the free end of the steel strand in the main machine hoisting system 8 penetrates through the guide pulley block 16 to hoist the main machine in the well.
The host machine in the well comprises a cutter head 3, a main drive 4, a steel pipe ring 5 and a supporting unit; the supporting unit of the embodiment is preferably a steel pipe sheet; as shown in fig. 3, a flange on the cutter head 3 is connected with a flange on the main drive 4 through a high-strength bolt, and the main drive 4 provides torque for the cutter head 3 in the tunneling process; one end of the steel pipe ring 5 is connected with a flange on the main drive 4; the other end of the steel pipe ring 5 is connected with the end face of the steel pipe sheet 6; the piston rod in the propulsion system 2 is opposite to the area of the steel pipe sheet 6, and the piston rod in the propulsion system 2 is propped against the steel pipe sheet 6, so that the thrust is transmitted to the cutter head 3.
The cutter head 3 is conical, and the diameter of a flange of the cutter head 3 is 10-50 mm larger than that of the steel pipe ring 5; a hinged oil cylinder 14 is fixed on the inner wall of the steel pipe ring 5; the main drive 4 is provided with a hinge seat 15; the piston rod of the hinged cylinder 14 is matched with the groove of the hinged seat 15.
Eight groups of hinged oil cylinders 14 are arranged; eight groups of hinged oil cylinders are uniformly arranged along the circumferential direction of the steel pipe ring 5, and piston rods of the hinged oil cylinders are inserted into grooves of the hinged seats 15 to fix the main drive 4 and adjust the position of the main drive 4.
The steel pipe piece 6 is of an annular structure formed by splicing a plurality of pipe pieces; the steel pipe piece of the embodiment is preferably formed by splicing two pipe pieces with semicircular sections, and the two pipe pieces are connected in a bolt connection mode or a welding mode or a combination mode of bolt connection and welding; the preferred combination form that adopts bolted connection and welding of this embodiment, the welding between two sections of jurisdiction adopts welding robot, welding robot installs on the steel pipe piece of treating assembling. The outer diameter of the steel pipe piece 6 is equal to the outer diameter of the steel pipe ring 5.
In the propelling process, one end of a piston rod of the hinged oil cylinder 14 extends into the hinged seat 15 on the outer wall of the main drive, so that the steel pipe ring 5 and the main drive 4 are connected into a whole, the thrust provided by the propulsion system 2 can be transmitted to the cutter head 3, and the propulsion oil cylinder of the propulsion system props against the steel pipe sheet to push the cutter head to tunnel downwards. The main drive 4 comprises a hydraulic motor, a reducer, a main bearing, a sealing system, a flange and the like. The propulsion system 2 comprises four groups of propulsion oil cylinders which are uniformly distributed along the circumferential direction of the steel pipe sheet 6.
The ground equipment further comprises a supporting and hoisting system 7, the supporting and hoisting system 7 is installed on the slide rail of the supporting structure frame 1, the supporting and hoisting system 7 can move on the slide rail, the supporting and hoisting system 7 is used for hoisting the steel pipe pieces 6 when the steel pipe pieces 6 are assembled, and the number of the supporting and hoisting system is two, and corresponds to the number of the steel pipe pieces.
The above-ground equipment further comprises a muddy water circulating system; the mud-water circulating system comprises a mud-water separating station 9 and a slurry discharging pump 10; the mud-water separation station 9 is fixedly arranged on the ground; the slurry discharging pump 10 is arranged in the center of a flange of the cutter head 3; one end of a slurry discharge pipe 11 is connected with the mud-water separation station 9, and the other end of the slurry discharge pipe 11 is connected with an outlet of a slurry discharge pump 10; one end of the slurry pumping pipe 12 is connected with the inlet of the slurry discharge pump 10; one end of the water inlet pipe 13 is connected with the mud-water separation station 9, and the other end of the water inlet pipe 13 is communicated into the cavity of the cutter head. At the in-process of slagging tap, mud passes through mud pump 10 pump sending to mud-water separation station 9, and mud-water separation station 9 can sieve mud and water, and after mud-water separation, water passes through inlet tube 13 circulation gets into the blade disc intracavity and mixes into mud with dregs, and the dregs under the excavation just slag tap with this kind of form.
The working process of the integral well-forming type vertical shaft heading machine comprises the following steps:
(1) after the previous ring of tunneling is finished, the propulsion oil cylinder is retracted;
(2) conveying the two pipe pieces to a hoisting area, and pre-assembling the two pipe pieces into an annular steel pipe piece;
(3) hoisting the steel pipe sheet;
(4) hoisting the steel pipe sheet to a wellhead position for splicing;
(5) the steel pipe sheet is pressed tightly by extending out of the propulsion oil cylinder;
(6) starting the cutter head to rotate (the slurry circulating system is always started in the tunneling process);
(7) the propulsion oil cylinder pushes the steel pipe sheet to enable the tunneling machine to complete downward tunneling operation.
Above-mentioned whole well-forming type shaft heading machine, overall structure mechanization degree is high, has significantly reduced intensity of labour. By adopting the steel pipe sheet for supporting, the device has wide geological adaptability and can be applied to the vertical shaft tunneling of soft soil, gravel, soft rock and hard rock stratums. Adopt the toper blade disc to carry out full-face excavation, slag tap through muddy water circulation system, adopt to piece together the steel pipe piece simultaneously and carry out first branch. Collect excavation, slag tap, just prop up in an organic whole, each process seamless connection, the efficiency of construction is fast.
The integral well-forming type shaft heading machine is provided with the host hoisting system, and the shaft heading machine can be disassembled after the equipment finishes heading, so that the construction cost is greatly reduced. And in the disassembly process, the main drive, the propulsion oil cylinder, the cutter head and the like are sequentially conveyed out through the main machine hoisting system. And the in-situ protective and quick assembly and disassembly are realized. In the case of relatively good geological conditions, the constructor can change the tool downhole.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The integral well-forming type vertical shaft tunneling machine is characterized by comprising ground equipment fixed on the ground and an underground main machine tunneled below the ground;
the above ground apparatus comprises a support structure frame (1) and a propulsion system (2); the support structure frame (1) is fixed on the ground plane; the propulsion system (2) is arranged on the support structure frame (1);
the host machine in the well comprises a cutter head (3), a main drive (4), a steel pipe ring (5) and a supporting unit; a flange on the cutter head (3) is connected with a flange on the main drive (4) through a high-strength bolt, and the main drive (4) provides torque for the cutter head (3) in the tunneling process; one end of the steel pipe ring (5) is connected with a flange on the main drive (4); the other end of the steel pipe ring (5) is connected with the supporting unit; a piston rod in the propulsion system (2) is over against the area of the support unit, and the piston rod in the propulsion system (2) is used for propping against the support unit and transmitting the thrust to the cutter head (3).
2. The shaft boring machine as claimed in claim 1, wherein the flange diameter of the cutter head (3) is 10-50 mm larger than the diameter of the steel pipe ring (5); a hinged oil cylinder (14) is fixed on the inner wall of the steel pipe ring (5); the main drive (4) is provided with a hinge seat (15); the piston rod of the hinged oil cylinder (14) is matched with the groove of the hinged seat (15).
3. A shaft boring machine according to claim 2, characterised in that there are eight groups of articulated cylinders (14); eight groups of hinged oil cylinders are uniformly arranged along the circumferential direction of the steel pipe ring (5), and piston rods of the hinged oil cylinders are inserted into grooves of the hinged seats (15) to fix the main drive (4) and adjust the position of the main drive (4).
4. A shaft boring machine according to claim 1, characterised in that the support unit is a steel tube sheet (6); the steel pipe piece (6) is of an annular structure formed by splicing two pipe pieces with semicircular sections, and the two pipe pieces are connected in a bolt connection mode or a welding mode or a combination mode of bolt connection and welding; the outer diameter of the steel pipe sheet (6) is equal to that of the steel pipe ring (5).
5. An integral shaft boring machine according to claim 1, characterised in that the propulsion system (2) comprises four sets of propulsion cylinders evenly distributed along the circumference of the steel tube sheet (6).
6. The integral shaft boring machine according to any one of claims 1 to 5, wherein the above-ground equipment further comprises a supporting and hoisting system (7), the supporting and hoisting system (7) is installed on a slide rail of the support structure frame (1), and the supporting and hoisting system (7) is used for hoisting pipe pieces when the steel pipe pieces (6) are assembled.
7. The shaft boring machine as claimed in claim 6, wherein the above ground equipment further comprises a main machine hoisting system (8), the main machine hoisting system (8) is fixed on the ground, the support structure frame (1) is provided with a guide pulley block (16), and the free ends of the steel strands in the main machine hoisting system (8) penetrate through the guide pulley block (16) to hoist the main machine in the well.
8. An integral shaft boring machine according to claim 7 wherein the above ground facility further comprises a mud and water circulation system; the mud-water circulating system comprises a mud-water separating station (9) and a slurry discharging pump (10); the mud-water separation station (9) is fixedly arranged on the ground; the slurry discharging pump (10) is arranged on a flange of the cutter head (3); one end of the slurry discharge pipe (11) is connected with the mud-water separation station (9), and the other end of the slurry discharge pipe (11) is connected with the outlet of the slurry discharge pump (10); one end of the slurry pumping pipe (12) is connected with the inlet of the slurry discharge pump (10); one end of the water inlet pipe (13) is connected with the mud-water separation station (9), and the other end of the water inlet pipe (13) is introduced into the cavity of the cutter head.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911134183.5A CN110671112A (en) | 2019-11-19 | 2019-11-19 | Integral well-forming type shaft heading machine |
| CN202010349923.3A CN111305846A (en) | 2019-11-19 | 2020-04-28 | Integral well-forming type shaft heading machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911134183.5A CN110671112A (en) | 2019-11-19 | 2019-11-19 | Integral well-forming type shaft heading machine |
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| Publication Number | Publication Date |
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| CN110671112A true CN110671112A (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911134183.5A Pending CN110671112A (en) | 2019-11-19 | 2019-11-19 | Integral well-forming type shaft heading machine |
| CN202010349923.3A Pending CN111305846A (en) | 2019-11-19 | 2020-04-28 | Integral well-forming type shaft heading machine |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202010349923.3A Pending CN111305846A (en) | 2019-11-19 | 2020-04-28 | Integral well-forming type shaft heading machine |
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| CN (2) | CN110671112A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111206931A (en) * | 2020-04-20 | 2020-05-29 | 中国铁建重工集团股份有限公司 | Cantilever shaft heading machine |
| CN111594176A (en) * | 2020-07-20 | 2020-08-28 | 中国铁建重工集团股份有限公司 | Vertical shaft tunneling construction method and vertical shaft structure aiming at gobi geological environment |
| CN111764906A (en) * | 2020-07-09 | 2020-10-13 | 中国水利水电夹江水工机械有限公司 | Full-face vertical shaft tunneling method |
| CN111764905A (en) * | 2020-07-09 | 2020-10-13 | 中国水利水电夹江水工机械有限公司 | Anti-twisting method for shaft tunneling |
| CN112855166A (en) * | 2021-01-04 | 2021-05-28 | 中煤科工集团重庆研究院有限公司 | Pressure drilling type construction method of gas-containing coal seam well bore under mountain land topographic condition |
| CN113775341A (en) * | 2021-11-11 | 2021-12-10 | 中国铁建重工集团股份有限公司 | Steel pipe sheet synchronous follow-up construction method suitable for shaft tunneling |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112253128B (en) * | 2020-09-07 | 2022-09-30 | 辽宁三三工业有限公司 | Full-automatic full-section vertical shield tunneling machine |
| CN113202478B (en) * | 2021-06-08 | 2023-04-11 | 中国铁建重工集团股份有限公司 | Step-changing tunneling method of vertical shaft tunneling machine and tunneling machine |
| CN114278305A (en) * | 2022-01-14 | 2022-04-05 | 中铁工程装备集团有限公司 | Hole expanding type vertical shaft tunneling machine and construction method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2779681B2 (en) * | 1990-03-06 | 1998-07-23 | 大成建設株式会社 | Underwater excavator |
| CN103452559B (en) * | 2013-09-16 | 2016-03-09 | 中铁工程装备集团有限公司 | Vertical shaft shield machine |
| CN108625800B (en) * | 2018-06-12 | 2023-10-24 | 中铁工程装备集团有限公司 | Multifunctional derrick for shaft construction |
| CN109630126A (en) * | 2018-12-06 | 2019-04-16 | 中建地下空间有限公司 | A kind of rotary shaft excavation machine of sinking method |
-
2019
- 2019-11-19 CN CN201911134183.5A patent/CN110671112A/en active Pending
-
2020
- 2020-04-28 CN CN202010349923.3A patent/CN111305846A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111206931A (en) * | 2020-04-20 | 2020-05-29 | 中国铁建重工集团股份有限公司 | Cantilever shaft heading machine |
| CN111764906A (en) * | 2020-07-09 | 2020-10-13 | 中国水利水电夹江水工机械有限公司 | Full-face vertical shaft tunneling method |
| CN111764905A (en) * | 2020-07-09 | 2020-10-13 | 中国水利水电夹江水工机械有限公司 | Anti-twisting method for shaft tunneling |
| CN111764905B (en) * | 2020-07-09 | 2022-07-12 | 中国水利水电夹江水工机械有限公司 | Anti-twisting method for shaft tunneling |
| CN111594176A (en) * | 2020-07-20 | 2020-08-28 | 中国铁建重工集团股份有限公司 | Vertical shaft tunneling construction method and vertical shaft structure aiming at gobi geological environment |
| CN112855166A (en) * | 2021-01-04 | 2021-05-28 | 中煤科工集团重庆研究院有限公司 | Pressure drilling type construction method of gas-containing coal seam well bore under mountain land topographic condition |
| CN112855166B (en) * | 2021-01-04 | 2023-01-06 | 中煤科工集团重庆研究院有限公司 | Pressure drilling type construction method of gas-containing coal seam well bore under mountain land topographic condition |
| CN113775341A (en) * | 2021-11-11 | 2021-12-10 | 中国铁建重工集团股份有限公司 | Steel pipe sheet synchronous follow-up construction method suitable for shaft tunneling |
| CN113775341B (en) * | 2021-11-11 | 2022-02-11 | 中国铁建重工集团股份有限公司 | Steel pipe sheet synchronous follow-up construction method suitable for shaft tunneling |
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Application publication date: 20200110 |