CN115504356B - Replacement method of traction steel wire rope of rail clamping vehicle in inclined or steeply inclined roadway - Google Patents
Replacement method of traction steel wire rope of rail clamping vehicle in inclined or steeply inclined roadway Download PDFInfo
- Publication number
- CN115504356B CN115504356B CN202211271317.XA CN202211271317A CN115504356B CN 115504356 B CN115504356 B CN 115504356B CN 202211271317 A CN202211271317 A CN 202211271317A CN 115504356 B CN115504356 B CN 115504356B
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- steel wire
- wire rope
- rail
- rope
- traction
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 178
- 239000010959 steel Substances 0.000 title claims abstract description 178
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000009954 braiding Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B19/00—Mining-hoist operation
- B66B19/02—Installing or exchanging ropes or cables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C11/00—Locomotives or motor railcars characterised by the type of means applying the tractive effort; Arrangement or disposition of running gear other than normal driving wheel
- B61C11/02—Locomotives or motor railcars characterised by the type of means applying the tractive effort; Arrangement or disposition of running gear other than normal driving wheel tractive effort applied to cables or chains
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/04—Transport of mined material in gravity inclines; in staple or inclined shafts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Transportation (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention discloses a method for replacing a rail clamping vehicle traction steel wire rope in an inclined or steeply inclined roadway, wherein a rail clamping vehicle and a traction winch are arranged on a winch platform; a counterweight car is arranged on the track with the flat section at the tail part, one end of the counterweight car is provided with a pulley, and a steel wire rope pulled by the rail car passes through the pulley; the new traction steel wire rope is placed on a bracket, and the bracket is positioned on a winch platform; the new traction steel wire rope and the steel wire rope to be replaced are connected in a braiding and inserting mode, the traction steel wire rope to be replaced is pulled out through the two loader alternative pull ropes until the old rope is pulled out completely, and the new rope is penetrated completely. By adopting the method, the rope-falling speed of a new rope of the steel wire rope pulled by the rail car can be controlled, the rope sliding phenomenon is prevented, and the controllability and the intrinsic safety level of replacing the steel wire rope are improved technically; stress in the process of replacing the steel wire rope can be eliminated, the phenomena of local kink deformation or wire breakage of the steel wire rope are eliminated, and the service life of the steel wire rope is prolonged; the tension of the steel wire rope can be increased, and the floor mopping abrasion of the steel wire rope when the rail clamping vehicle runs is eliminated.
Description
Technical Field
The invention relates to a method for replacing a rail car traction steel wire rope, in particular to a method for replacing a rail car traction steel wire rope in an inclined or steeply inclined roadway, and belongs to the field of mine auxiliary transportation systems.
Background
The rail car is one of auxiliary transportation systems widely used in mine production, the rail car system can select locomotive traction and wire rope traction according to different actual working conditions, and the rail car with wire rope traction is used in inclined or steeply inclined roadways to realize transportation of personnel, materials and equipment, particularly large-scale equipment. The rail car that uses in a large number at home and abroad still uses the majority of rope traction, and rail car haulage rope is mostly wire rope, is the key part in the rail car transportation system, directly influences rail car safety and stability operation, just must change when rail car haulage wire rope uses and reaches the change standard.
The conventional method for replacing the traction steel wire rope of the rail clamping vehicle in the inclined or steeply inclined roadway is that after two ends of the steel wire rope are completely separated from rail clamping vehicle equipment, one end of the steel wire rope is connected with a new steel wire rope, and the other end of the steel wire rope is dragged by using a winch or a loader and other machines, so that the new steel wire rope replaces an old steel wire rope. The method has the following defects that (1) due to the inclination of a roadway, a rope slipping phenomenon easily occurs when a new steel wire rope is taken down, and the control is not easy; (2) when the new steel wire rope is released, the stress cannot be released, so that the steel wire rope is locally kinked and deformed or broken, and the service life of the traction steel wire rope of the rail clamping machine is greatly influenced; (3) when the new steel wire rope is put in place, the steel wire rope is worn out by mopping due to insufficient tension when the rail clamping vehicle runs.
Disclosure of Invention
The invention aims to provide a replacement method of a traction steel wire rope of a rail clamping vehicle, which can control the rope unloading speed of a new rope of the traction steel wire rope of the rail clamping vehicle and prevent the rope slipping phenomenon; the new rope of the steel wire rope is pulled by the rail clamping vehicle and is always in a tensioning state when the new rope is taken down, so that the stress of the new rope is eliminated, the local kinking deformation or wire breakage phenomenon of the steel wire rope is eliminated, and the service life of the steel wire rope is prolonged; the tension of the steel wire rope is increased, and the abrasion of the steel wire rope in the floor mopping process when the rail clamping vehicle runs is avoided.
The invention provides a method for replacing a traction steel wire rope of a rail car, which is mainly characterized by comprising the following steps of: the winch and the two loaders are used for combined operation, and the old steel wire rope is dragged to pull out the new steel wire rope, so that the replacement operation of the steel wire rope is realized, and the safety coefficient and the operation efficiency are remarkably improved.
The invention provides a replacement method of a traction steel wire rope of a rail clamping vehicle, wherein the rail clamping vehicle and a traction winch are arranged on a winch platform; a counterweight car is arranged on the track with the flat section at the tail part, one end of the counterweight car is provided with a pulley, and a steel wire rope pulled by the rail car passes through the pulley; the new traction steel wire rope is placed on a bracket, and the bracket is positioned on a winch platform; the first loader and the second loader are positioned on a wide field at one side of the winch platform; the new traction steel wire rope and the steel wire rope to be replaced are connected in a braiding and inserting mode, the traction steel wire rope to be replaced is pulled out through the two loader alternative pull ropes until the old rope is pulled out completely, and the new rope is penetrated completely.
The invention provides a replacement method of a traction steel wire rope of a rail car, which comprises the following steps:
s1, manufacturing and installing a counterweight car on a flat section rail at the tail part of a rail clamping car system, installing a pulley at one end of the counterweight car, and enabling a rail clamping car traction steel wire rope to pass through the pulley.
S2, placing the new traction steel wire rope to be replaced on a bracket fixed on a winch platform.
S3, fixing the two rail clamping vehicle traction steel wires on the rail by using steel wire rope clamps at the upper slope-changing section of the rail clamping system.
S4, removing the rope head of the front section of the traction steel wire rope of the rail clamping vehicle from the rail clamping vehicle, and braiding and inserting the rope head with a new traction steel wire rope on the bracket after removing the rope head.
S5, removing the rear rope end of the traction steel wire rope of the rail clamping vehicle from the rail clamping vehicle, clamping and fixing the rear rope end on a first loader (a winch or other machines can be used instead of the loader) by using the steel wire rope, and tensioning the traction steel wire rope of the rail clamping vehicle.
S6, loosening the steel wire rope to protect the rope.
S7, a driver of the rail car operates the steel wire rope traction winch to unwind, and meanwhile the tail counterweight car retreats (the retreating distance is determined according to the length of the counterweight lane rail and the walkable distance of the ground loader), so that the steel wire rope in the rail car traction is always kept in a tensioning state.
S8, a driver of the rail car operates the steel wire rope traction winch to stop, the first loader starts the pull rope, and meanwhile the tail counterweight car advances forward, so that the steel wire rope in rail car traction is always kept in a tensioning state.
S9, after the first loader stay cord is in place, the second loader is retracted to the vicinity of the slope changing section on the upper portion of the rail clamping system, the rail clamping system traction steel wire rope is fixed to the second loader, and the first loader steel wire rope is loosened.
S10, repeating S7: the driver of the rail car operates the steel wire rope to pull the winch to pull the rope, and meanwhile, the tail counterweight car retreats (the retreating distance is determined according to the length of the counterweight lane rail and the walkable distance of the ground loader), so that the steel wire rope pulled by the rail car is always kept in a tensioning state.
S11, a driver of the rail car operates the steel wire rope traction winch to stop, the second loader starts the pull rope, and meanwhile the tail counterweight car advances forward, so that the steel wire rope in rail car traction is always kept in a tensioning state.
S12, the first loader is retracted to the vicinity of the upper slope changing section of the rail clamping system, the rail clamping system traction steel wire rope is fixed to the first loader, and the second loader steel wire rope is loosened.
S13, repeating the steps of S7-S8-S9-S10-S11-S12 until all the old rope of the traction steel wire rope of the rail clamp vehicle is drawn out, and all the new rope is penetrated, so that the traction steel wire rope of the rail clamp vehicle always maintains a tensioning state.
S14, separating the tail counterweight car from the rail car traction steel wire rope.
S15, fixing the two rail clamping vehicle traction steel wires on the rail by using a steel wire rope protection rope at the upper slope-changing section of the rail clamping system by using a steel wire rope clamp, and loosening the steel wire ropes by using a loader.
S16, fixing two ends of the new traction steel wire rope on the rail clamping vehicle, removing the steel wire rope protection rope, and completing replacement of the traction steel wire rope of the rail clamping vehicle.
The invention has the beneficial effects that:
(1) By adopting the method, the rope-falling speed of a new rope of the traction steel wire rope of the rail car can be controlled, the rope-sliding phenomenon is prevented, and the controllability and the intrinsic safety level of replacing the steel wire rope are improved technically.
(2) The method of the invention can eliminate the stress in the process of replacing the steel wire rope, eliminate the phenomena of local kink deformation or wire breakage of the steel wire rope and prolong the service life of the steel wire rope
(3) By adopting the method, the tension of the steel wire rope can be increased, and the floor mopping abrasion of the steel wire rope during the running of the rail clamping vehicle can be eliminated.
Drawings
FIG. 1 is a schematic diagram of a process for replacing a railcar traction wire rope.
Fig. 2 is a top view of fig. 1.
In the figure: 1. a tail flat section track; 2. a weight-balancing vehicle; 3. a pulley; 4. the rail clamping vehicle pulls the steel wire rope; 5. new traction wire rope; 6. a winch platform; 7. a bracket; 8. an upper side slope section; 9. protecting the steel wire rope; 10. a steel wire rope clip; 11. rope head of the front section of the steel wire rope; 12. a rail clamping vehicle; 13. rope ends at the rear section of the steel wire rope; 14. a first loader; 15. traction winch; 16. and a second loader.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The following describes in detail the technical scheme provided by the embodiment of the invention with reference to the accompanying drawings.
The embodiment of the invention provides a method for replacing a rail car traction steel wire rope in a steeply inclined roadway, which is characterized in that a rail car 12 and a traction winch 15 are arranged on a winch platform 6 as shown in fig. 1 and 2; a counterweight car 2 is arranged on a track 1 with a flat section at the tail part, a pulley 3 is arranged at one end of the counterweight car 2, and a traction steel wire rope 4 of a rail car passes through the pulley 3; the new traction steel wire rope 5 is placed on a bracket 7, and the bracket 7 is positioned on a winch platform 6; the first loader 14 and the second loader 16 are positioned on a wide field on the south side of the winch platform, so that the loaders have enough travel distance; the new traction steel wire rope 5 and the steel wire rope to be replaced are connected in a braiding and inserting mode, and the traction steel wire rope to be replaced is gradually pulled out through two loader pull ropes until the old rope is completely pulled out, and the new rope is completely penetrated.
The method specifically comprises the following steps:
s1, manufacturing and installing a heavy truck 2 on a flat section track 1 at the tail part of a rail clamping vehicle system, installing a pulley 3 at one end of the heavy truck, enabling a rail clamping vehicle traction steel wire rope 4 to pass through the pulley 3, checking and maintaining the heavy truck in advance, ensuring reliable operation of a driving system, and enabling the heavy truck to operate flexibly.
S2, placing the new traction steel wire rope 5 ready for replacement on a bracket 7 fixed by a winch platform 6, wherein the bracket is stable to mount and prevent toppling in the process of pulling the steel wire rope.
S3, fixing the two rail clamping vehicle traction steel wire ropes 4 on the rail by using the steel wire rope clamps 10 respectively at the upper slope changing section 8 of the rail clamping vehicle system by using the steel wire rope protection ropes 9, and selecting proper steel wire rope protection ropes according to the total pulling weight.
S4, removing the rope head 11 of the front section of the traction steel wire rope of the rail clamp vehicle from the rail clamp vehicle 12 and braiding and inserting the rope head with the new traction steel wire rope 5, wherein the length of the traction steel wire rope of the rail clamp vehicle is 1950 m, the weight is 7.8T, the diameter is 28mm, and the rope head is in braiding and inserting connection with the new and old ropes.
S5, removing the rope end 13 of the rear section of the old steel wire rope pulled by the rail clamping vehicle from the rail clamping vehicle 12, fixing the steel wire rope on the first loader 14 by using the steel wire rope clamp 10, and tensioning the steel wire rope pulled by the rail clamping vehicle by the loader.
S6, loosening the steel wire rope protection rope 9.
S7, a driver of the rail clamp vehicle operates the steel wire rope traction winch 15 to unwind, and meanwhile the tail counterweight vehicle 2 retreats (the retreating distance is determined according to the length of the counterweight lane rail and the walkable distance of the ground loader, and the retreating distance of the embodiment is 30 m), so that the steel wire rope 4 drawn by the rail clamp vehicle is always kept in a tensioning state, and stress torsion is prevented from being generated after the steel wire rope is loosened.
S8, a rail car driver operates the steel wire rope traction winch 15 to stop, the first loader 14 starts the pull rope 60m, and meanwhile the tail counterweight car 2 advances, so that the rail car traction steel wire rope 4 is always kept in a tensioning state.
S9, after the pull rope 60m of the first loader 14 is in place, the second loader 16 is retracted to the vicinity of the slope changing section 8 at the upper part of the rail clamping system, the rail clamping system traction steel wire rope 4 is fixed to the second loader 1, and after the steel wire rope is fixed, the steel wire rope of the first loader is loosened to prevent slipping.
S10, repeating the step S7.
S11, a rail car driver operates the steel wire rope traction winch 15 to stop, the second loader 16 starts the pull rope 60m, and meanwhile the tail counterweight car 2 advances, so that the rail car traction steel wire rope 4 is always kept in a tensioning state.
S12, loosening the steel wire rope fixed on the first loader 14, and moving the first loader 14 to the vicinity of the upper slope changing section 8 of the rail clamping system to fix the rail clamping system traction steel wire rope 4 on the first loader 14.
S13, repeating the steps of S7-S8-S9-S10-S11-S12 until all the old rope of the traction steel wire rope of the rail clamp vehicle is drawn out, and all the new rope is penetrated, so that the traction steel wire rope 4 of the rail clamp vehicle is always kept in a tensioning state.
S14, separating the tail counterweight car 2 from the rail car traction steel wire rope 4.
S15, fixing the two rail clamping vehicle traction steel wire ropes 4 on the rail respectively by using the steel wire rope clamps 10 at the upper slope changing section 8 of the rail clamping vehicle system, and loosening the steel wire ropes by using the loader.
S16, fixing two ends of the new traction steel wire rope on the rail clamping vehicle 12, removing the steel wire rope protection rope 9, and completing replacement of the traction steel wire rope of the rail clamping vehicle.
By using the method for replacing the rail clamping vehicle to pull the steel wire rope, the steel wire rope can be prevented from being damaged in the replacement process, and the service life of the steel wire rope is prolonged by more than one time. The service life of the steel wire rope is prolonged to 2 years after the steel wire rope is pulled by the rail car is replaced by the method, and the cost of the steel wire rope can be saved by 50 ten thousand yuan/2=25 ten thousand yuan/year; the replacement time of the embodiment can be reduced by more than 50 percent.
Claims (2)
1. A method for replacing a traction steel wire rope of a rail car in an inclined or steeply inclined roadway is characterized by comprising the following steps of: a rail clamping vehicle and a traction winch are arranged on the winch platform; a counterweight car is arranged on the track with the flat section at the tail part, one end of the counterweight car is provided with a pulley, and a steel wire rope pulled by the rail car passes through the pulley; the new traction steel wire rope is placed on a bracket, and the bracket is positioned on a winch platform; the first loader and the second loader are positioned on a wide field at one side of the winch platform; the new traction steel wire rope is connected with the steel wire rope to be replaced in a braiding and inserting mode, the traction steel wire rope to be replaced is pulled out through the two loader alternative pulling ropes until the old rope is completely pulled out, and the new rope is completely penetrated;
the method for replacing the traction steel wire rope of the rail car in the inclined or steeply inclined roadway comprises the following steps of:
s1, manufacturing and installing a counterweight car on a flat section track at the tail part of a rail clamping car system, installing a pulley at one end of the counterweight car, and enabling a rail clamping car traction steel wire rope to pass through the pulley;
s2, placing the new traction steel wire rope to be replaced on a bracket fixed by a winch platform;
s3, fixing two steel wire ropes for traction of the clamping rail vehicle on the track by using steel wire rope protection ropes at the upper slope-changing section of the clamping rail vehicle system;
s4, removing the rope head of the front section of the traction steel wire rope of the rail clamping vehicle from the rail clamping vehicle, and braiding and inserting the rope head with a new traction steel wire rope on the bracket after removing the rope head;
s5, removing the rope end of the rear section of the steel wire rope drawn by the rail clamping vehicle from the rail clamping vehicle, clamping and fixing the steel wire rope on the first loader, and tensioning the steel wire rope drawn by the rail clamping vehicle;
s6, loosening the steel wire rope to protect the rope;
s7, a driver of the rail car operates the steel wire rope to draw the winch to draw the rope, and meanwhile, the tail counterweight car retreats, the retreating distance is determined according to the length of the counterweight lane rail and the walkable distance of the ground loader, so that the steel wire rope drawn by the rail car is always kept in a tensioning state;
s8, a driver of the rail car operates the steel wire rope traction winch to stop, the first loader starts the pull rope, and meanwhile, the tail counterweight car advances forward, so that the steel wire rope in the rail car traction is always kept in a tensioning state;
s9, after the first loader stay cord is in place, the second loader is retracted to the vicinity of the slope changing section at the upper part of the rail clamping system, the rail clamping system traction steel wire rope is fixed to the second loader, and the first loader steel wire rope is loosened;
s10, repeating S7: the driver of the rail car operates the steel wire rope to pull the winch to pull down the rope, and the tail counterweight car retreats at the same time, so that the steel wire rope pulled by the rail car is always kept in a tensioning state;
s11, a driver of the rail car operates a steel wire rope traction winch to stop, a second loader starts a pull rope, and meanwhile, the tail counterweight car advances forward, so that the steel wire rope drawn by the rail car is always kept in a tensioning state;
s12, the first loader is retracted to the vicinity of the upper slope changing section of the rail clamping system, the rail clamping system traction steel wire rope is fixed to the first loader, and the second loader steel wire rope is loosened;
s13, repeating the steps of S7-S8-S9-S10-S11-S12 until all old ropes of the traction steel wire rope of the rail clamp vehicle are drawn out, and all new ropes penetrate, so that the traction steel wire rope of the rail clamp vehicle is always kept in a tensioning state;
s14, separating the tail counterweight car from the rail car traction steel wire rope;
s15, fixing two steel wire ropes for traction of the clamping rail vehicle on the track respectively by using a steel wire rope protection rope at the upper slope-changing section of the clamping rail vehicle system, and loosening the steel wire ropes by using a loader;
s16, fixing two ends of the new traction steel wire rope on the rail clamping vehicle, removing the steel wire rope protection rope, and completing replacement of the traction steel wire rope of the rail clamping vehicle.
2. The method of replacing a railcar traction wire rope in a sloped or steeply sloped roadway of claim 1, wherein: in step S5, the loader can be replaced with a hoist or other implement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211271317.XA CN115504356B (en) | 2022-10-18 | 2022-10-18 | Replacement method of traction steel wire rope of rail clamping vehicle in inclined or steeply inclined roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211271317.XA CN115504356B (en) | 2022-10-18 | 2022-10-18 | Replacement method of traction steel wire rope of rail clamping vehicle in inclined or steeply inclined roadway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115504356A CN115504356A (en) | 2022-12-23 |
| CN115504356B true CN115504356B (en) | 2023-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211271317.XA Active CN115504356B (en) | 2022-10-18 | 2022-10-18 | Replacement method of traction steel wire rope of rail clamping vehicle in inclined or steeply inclined roadway |
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| Country | Link |
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| CN (1) | CN115504356B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07133085A (en) * | 1993-11-10 | 1995-05-23 | Mitsubishi Denki Bill Techno Service Kk | Replacement of main rope of elevator |
| EP1591406A2 (en) * | 2004-04-29 | 2005-11-02 | Kone Corporation | Method and apparatus for changing the rope of a traction sheave elevator |
| CN105016184A (en) * | 2015-07-08 | 2015-11-04 | 徐州九益科技有限公司 | Replacement process for lifting steel wire rope of vertical shaft multi-rope friction lifter |
| CN112629871A (en) * | 2020-08-24 | 2021-04-09 | 中国汽车技术研究中心有限公司 | Method and system for changing steel wire rope in traction equipment for automobile crash test |
| CN112694001A (en) * | 2020-12-09 | 2021-04-23 | 徐州市三森威尔矿山科技有限公司 | Method for replacing flat tail rope of mine hoisting system |
-
2022
- 2022-10-18 CN CN202211271317.XA patent/CN115504356B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07133085A (en) * | 1993-11-10 | 1995-05-23 | Mitsubishi Denki Bill Techno Service Kk | Replacement of main rope of elevator |
| EP1591406A2 (en) * | 2004-04-29 | 2005-11-02 | Kone Corporation | Method and apparatus for changing the rope of a traction sheave elevator |
| CN105016184A (en) * | 2015-07-08 | 2015-11-04 | 徐州九益科技有限公司 | Replacement process for lifting steel wire rope of vertical shaft multi-rope friction lifter |
| CN112629871A (en) * | 2020-08-24 | 2021-04-09 | 中国汽车技术研究中心有限公司 | Method and system for changing steel wire rope in traction equipment for automobile crash test |
| CN112694001A (en) * | 2020-12-09 | 2021-04-23 | 徐州市三森威尔矿山科技有限公司 | Method for replacing flat tail rope of mine hoisting system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115504356A (en) | 2022-12-23 |
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