CN106285670A - A kind of rock breaking method - Google Patents
A kind of rock breaking method Download PDFInfo
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- CN106285670A CN106285670A CN201610660208.5A CN201610660208A CN106285670A CN 106285670 A CN106285670 A CN 106285670A CN 201610660208 A CN201610660208 A CN 201610660208A CN 106285670 A CN106285670 A CN 106285670A
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- machine
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- 238000000034 method Methods 0.000 title claims abstract description 25
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- 238000012423 maintenance Methods 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 6
- 230000008520 organization Effects 0.000 description 6
- 238000005065 mining Methods 0.000 description 5
- 102000016938 Catalase Human genes 0.000 description 4
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- 230000008901 benefit Effects 0.000 description 3
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
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- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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- 239000003245 coal Substances 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 229910052571 earthenware Inorganic materials 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
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- 239000002828 fuel tank Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C27/00—Machines which completely free the mineral from the seam
- E21C27/20—Mineral freed by means not involving slitting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
- E21C29/22—Propulsion of machines for slitting or completely freeing the mineral from the seam by wheels, endless tracks or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C47/00—Machines for obtaining or the removal of materials in open-pit mines
- E21C47/10—Machines for obtaining or the removal of materials in open-pit mines for quarrying stone, sand, gravel, or clay
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of rock breaking method, comprise the following steps: A, the broken rock machine of rock operating area will be provided with brokenly, exercise or mobile to petrographic province territory to be broken, making brokenly rock operating area be positioned at the top in petrographic province territory to be broken, the broken rock operating area of described broken rock machine is through brokenly rock railcar body and the hollow area perpendicular with ground；B, operation rock arm, control the broken petrosa on rock arm at broken rock operating area downward actuation；C, the broken petrosa of rock arm carry out brokenly rock to the rock in broken rock operating area.Present invention solves the technical problem that the weight being to make full use of brokenly rock machine strengthens rock arm rock breaking efficiency in broken rock operating area, effectively make rock upper-arm circumference carry out brokenly rock operation around the center of gravity of broken rock machine and nearest region thereof；Meanwhile, on the premise of ensureing rock breaking efficiency, greater weight arm need not be lifted, it becomes possible to the energy loss flogged a dead horse is preferably minimized, thus reduce broken rock energy consumption.
Description
Technical field
Catalase field of the present invention, particularly relates to a kind of rock breaking method.
Background technology
Catalase is to make part rock mass depart from parent and be broken into the technique of sillar in digging operation, main in prior art
Having that blast is broken, Mechanical Crushing, water jet rock breaking and broken etc. four kinds of heating power.Wherein,
Blast is broken: utilize the huge energy fractured rock of explosive or other explosive abrupt releases, the most most widely used
Effectively.
Mechanical Crushing: cut and cut, rush chisel, roll, grind four kinds of modes.During broken rock, rock crushing tool enters rock, at instrument
In the rock mass in mobile front, compact core occurs.Produce around compact core and relatively large collapse broken body.Mechanical Crushing should in hard rock
It is that tool wear is serious by the widest main cause.Its degree of wear is hard mineral (mainly quartz) in depending primarily on rock
Content and granular size.
Water jet rock breaking: point low pressure and mass flow and high-pressure low-flow two kinds.The former is less than 2 × 107Pa by pressure, is used for
Hydraulic mining or coal mining (see hydraulic mining method, the outdoor hydraulic mining of placer)；The latter's pressure up to several hundred million handkerchiefs (Pa) more than, be used for
Cutting rock.Additionally develop pulsed fluidics, can effectively crush solid rock and without the most high-power.?
High instantaneous pressure, has reached 5.6GPa.The energy consumption of Rock Fragmentation by High-Pressure Jet is high, and mechanical realization is more complicated, many as driving
Machine and the supplementary means of outdoor rotary drill fractured rock.
Heating power crushes: form high thermograde in rock mass, and utilizes the coefficient of thermal expansion of each component of rock different, is formed
Thermal stress, makes rock mass peel off or crisp broken.The more rock containing quartz uses this method effect preferable.Modern heat method has aluminothermy
Agent, flame injection, flame passes, microwave, infrared ray radiation, high-power electron beam, powerful breakdown current, laser etc..But except fire
Outward, other are in experimental stage to flame spurt method (jet pierer).
For above-mentioned four kinds of techniques, Mechanical Crushing because there is the advantages such as safety is high, crushing effect is good and by for extensive
Use.At present, the ordinary excavator that mainly uses of Mechanical Crushing carries broken rock facility (hydraulic breaking hammer, high-frequency breaking hammer, pine
Earthenware, rock arm etc.), split stone implement, bull-dozer etc. and carry out brokenly rock operation.If Chinese patent notification number is " CN204672317U "
Prior art discloses a kind of efficiently boulder cracker on the 30th JIUYUE in 2015, and its technical scheme is described boulder cracker bag
Include the support being installed on horn, be mounted with the catalase mechanism with drill steel at this support, it is characterized in that pacifying at described support
Fill the rock-boring mechanism with drill.But in actual rock break-off process, such broken rock machine, because of himself feature, exists
In place of some wretched insufficiencies, mainly Energy Efficiency Ratio is poor, although these equipments disclosure satisfy that the rock stratum of high, medium and low hardness, but
Specific aim is not strong, causes engineering construction inefficient.And can not effectively utilize machine own wt to increase in rock break-off process
The lower shear force of rock arm, the speed causing brokenly rock is slower.
Summary of the invention
It is an object of the invention to solve the above-mentioned problems in the prior art, it is provided that a kind of rock breaking method.The present invention
Solve the technical problem that the weight being to make full use of brokenly rock machine strengthens rock arm rock breaking efficiency in broken rock operating area,
Rock upper-arm circumference is effectively made to carry out brokenly rock operation around the center of gravity of broken rock machine and nearest region thereof；Meanwhile, rock breaking efficiency is being ensured
Under premise, greater weight arm need not be lifted, it becomes possible to the energy loss flogged a dead horse is preferably minimized, thus reduce broken rock energy
Consumption.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of rock breaking method, it is characterised in that comprise the following steps:
A, the broken rock machine of rock operating area will be provided with brokenly, and exercise or mobile to petrographic province territory to be broken, make brokenly rock operating area be positioned at
The top in petrographic province territory to be broken, the broken rock operating area of described broken rock machine is through brokenly rock railcar body and the sky perpendicular with ground
Heart region；
B, operation rock arm, control the broken petrosa on rock arm at broken rock operating area downward actuation；
C, the broken petrosa of rock arm carry out brokenly rock to the rock in broken rock operating area.
In described step A, broken rock operating area is positioned at behind the top in broken petrographic province territory, by hydraulic support mechanism to broken
Rock machine is supported.
In described step A, on the premise of broken rock machine does not moves, the area of broken rock operating area is 7 50 square metres.
Described broken rock machine includes that rock arm and car body, described car body include walking mechanism, vehicle frame and contiguous block, and vehicle frame is symmetrical
Being arranged in walking mechanism, contiguous block is fixed between vehicle frame, and described broken rock operating area refers to vehicle frame and contiguous block within it
The hollow area that side is formed, described rock arm is connected on contiguous block, and the broken petrosa of rock arm passes through controlling organization at broken rock
Can move freely in operating area.
It is provided with mass in described contiguous block.
Described hydraulic support mechanism includes that four supporting parts, four supporting parts are connected to below car body.
Maintenance breach it is provided with on described contiguous block.
Described rock arm is connected on contiguous block by rotating shaft.
Described contiguous block is connected by bolt and vehicle frame are fixing.
Described walking mechanism includes two set creepers undercarriage, and vehicle frame is symmetrically connected on two set creepers undercarriage.
Described walking mechanism includes four set creepers undercarriage, and vehicle frame is symmetrically connected on four set creepers undercarriage.
Employing it is an advantage of the current invention that:
One, in the present invention, by formed in the middle part of car body perpendicular to the ground and run through the broken rock operating area of car body, it is possible to fill
Divide the weight utilizing broken rock machine to strengthen rock arm rock breaking efficiency in broken rock operating area, effectively make rock upper-arm circumference around broken rock
The center of gravity of machine carries out brokenly rock, is conducive to improving efficiency of construction；Meanwhile, on the premise of ensureing rock breaking efficiency, need not lift bigger
The arm of weight, it becomes possible to the energy loss flogged a dead horse is preferably minimized, thus reduce broken rock energy consumption.
Two, in the present invention, stability when rock machine breaks rock can be strengthened brokenly by hydraulic support mechanism, and improve broken rock machine
When broken rock with the frictional resistance on ground, so that broken rock machine obtains the broken rock power of maximum horizontal direction.
Three, in the present invention, on the premise of broken rock machine does not moves, the area of broken rock operating area is set to 7 50 squares
Rice, is more effectively applicable to most of mine, it is simple to operation, can reach efficiency of breaking rock and the best combination of walking number of times, i.e. exist
On the premise of reducing walking number of times, improve efficiency of breaking rock.
Four, in the present invention, make the working region of rock arm also within the scope of car body by broken rock operating area, adopt
With the broken rock machine of this structure, it is possible to the weight making full use of brokenly rock machine strengthens the rock breaking efficiency of rock arm, effectively makes rock arm
Center of gravity around broken rock machine carries out brokenly rock, is conducive to improving efficiency of construction.Meanwhile, under ensureing rock arm in the case of shear force,
Greater weight arm need not be lifted, it is possible to the energy loss flogged a dead horse is preferably minimized, thus reduce broken rock energy consumption.The present invention
It is exclusively used in catalase, in the crushing rock formation of middle hardness and following hardness works, has energy more more preferable than other Work machine
Effect ratio and specific aim, the broken rock operation of the more generous amount being mainly used in mining and foundation construction.It addition, car body is main
Being formed by connecting by walking mechanism, vehicle frame and contiguous block, this structure makes whole car body become a tetragonal body, improves car body and exists
Stability during broken rock and balance.Wherein, and rock arm is connected on contiguous block, and rock arm can be made at the focus point of broken rock machine
And region carries out brokenly rock operation recently.
Five, in the present invention, arranging mass in contiguous block, one is the steadiness that can improve brokenly rock machine when broken rock,
Two are advantageous for the lower shear force further enhancing rock arm when broken rock, and three is the advantage with convenient transportation and easy accessibility.
Six, in the present invention, four supporting parts are connected to the structure below car body, when being conducive to the broken rock machine of raising to break rock
Balance and stability.
Seven, in the present invention, the maintenance being made brokenly rock machine by maintenance breach is convenient, is conducive to improving broken rock machine and occurs
Inspection speed during fault.
Eight, in the present invention, rock arm is connected on contiguous block by rotating shaft, it is possible to increase the broken rock scope of rock arm.
Nine, in the present invention, contiguous block is connected by bolt and vehicle frame are fixing so that contiguous block steadiness on vehicle frame is more
Good.
Ten, in the present invention, walking mechanism includes two set creepers undercarriage, and vehicle frame is symmetrically connected to two set crawler travel machines
Structure on structure so that broken rock machine can be walked in broken rock construction area with a varied topography.
11, in the present invention, walking mechanism includes four set creepers undercarriage, and vehicle frame is symmetrically connected to four set crawler travels
In mechanism, this structure makes brokenly rock machine can walk in the broken rock construction area of complicated landform and dangerous landform.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is controlling organization and the attachment structure schematic diagram of vehicle frame in the present invention；
Fig. 3 is rock arm and the attachment structure schematic diagram of contiguous block in the present invention；
Fig. 4 is hydraulic support mechanism and the attachment structure schematic diagram of vehicle frame in the present invention；
Fig. 5 is the structural representation of contiguous block in the present invention；
Fig. 6 is the structural representation that the present invention uses four set creepers undercarriage；
Being labeled as in figure: 1, rock arm, 2, contiguous block, 3, broken rock operating area, 4, vehicle frame, 5, control room, 6, supporting part, 7,
Maintenance breach, 8, creeper undercarriage.
Detailed description of the invention
Embodiment 1
A kind of rock breaking method, comprises the following steps:
A, the broken rock machine of rock operating area 3 will be provided with brokenly, and exercise or mobile to petrographic province territory to be broken, make brokenly 3, rock operating area
In the top in petrographic province territory to be broken, the broken rock operating area 3 of described broken rock machine is through brokenly rock railcar body and perpendicular with ground
Hollow area；
B, operation rock arm 1, control the broken petrosa on rock arm 1 at broken rock operating area 3 downward actuation；
C, the broken petrosa of rock arm 1 carry out brokenly rock to the rock in broken rock operating area 3.
Wherein, the area of broken rock operating area 3 is set to 7 50 square metres, preferably about 30 square metres, in order to one
Secondary property completes the broken rock operation of more generous amount.And be positioned in broken rock operating area 3 after above broken petrographic province territory, if broken rock machine with
The frictional force in broken petrographic province territory is less, then need to be supported broken rock machine by hydraulic support mechanism, if broken rock machine and broken petrographic province
The frictional force in territory is relatively big, then need not be supported broken rock machine by hydraulic support mechanism, i.e. according to the demand to frictional force
Size decides whether to use hydraulic pressure support.
In the present embodiment, described broken rock machine includes controlling organization, rock arm 1 and car body, described car body include walking mechanism,
Vehicle frame 4 and contiguous block 2, described walking mechanism includes two set creepers undercarriage 8.Vehicle frame 4 is preferably two, and contiguous block 2 is preferred
Being two, two vehicle frames 4 are symmetricly set on two set creepers undercarriage 8, and two contiguous blocks 2 are fixed between two vehicle frames 4,
Described broken rock operating area 3 refers to the hollow area that the vehicle frame 4 of car body and contiguous block 2 are within it formed, described in run through car body
Refer to brokenly that rock operating area 3 passes car body, and on car body, form hollow region；Described rock arm 1 is connected to by rotating shaft
Connect on block 2, and the broken petrosa of rock arm 1 be can move freely in broken rock operating area 3 by controlling organization and broken rock；Further
, preferably rock arm 1 is arranged on the middle part in whole width of the carbody direction, in order to expand the broken rock scope of rock arm 1；Described control
Mechanism processed is fixed on vehicle frame 4, and described controlling organization includes control room 5, electromotor, fuel tank, corresponding pipeline and automatically controlled part
Deng, it is used for controlling hydraulic support mechanism, rock arm 1 and walking mechanism action；Described hydraulic support mechanism includes four supporting parts
6, four supporting parts 6 are respectively fixedly connected with below the end of two vehicle frames 4.During broken rock operation, according to the demand to frictional force
Size decides whether to use hydraulic pressure support.
In the present embodiment, the inside of described contiguous block 2 offers cavity, is provided with the object conduct that proportion is bigger in cavity
Mass, such as barite etc..
In the present embodiment, described contiguous block 2 is provided with the maintenance breach 7 for overhauling broken rock machine.
In the present embodiment, the bottom, two ends of described contiguous block 2 is provided with inverted L-shaped step, during installation, first passes through inverted L-shaped
The two ends of contiguous block 2 are placed on two vehicle frames 4 by step, then are fixed on vehicle frame 4 by contiguous block 2 by bolt.Above-mentioned set
The mode of putting is preferred, but in actual application, also can have other fixed structure multiple, and such as, the two ends of contiguous block 2 can be slided
Be automatically connected on two vehicle frames 4, in order to the area of the broken rock operating area 3 of regulation, when be adjusted to suitably to break scar long-pending after again
Fixing.
In the present embodiment, the complete machine weight of broken rock machine is about between 50 150 tons, but along with the lifting of material technology, is somebody's turn to do
Weight is likely to decrease.
Embodiment 2
The present embodiment is substantially the same manner as Example 1, differs primarily in that:
Described walking mechanism includes that four set creepers undercarriage 8, every vehicle frame 4 are connected on two set creepers undercarriage 8, two
Vehicle frame 4 is respectively symmetrically and is connected on four set creepers undercarriage 8, and four set creepers undercarriage 8 are by controlling organization control.
Claims (10)
1. a rock breaking method, it is characterised in that comprise the following steps:
A, the broken rock machine of rock operating area (3) will be provided with brokenly, and exercise or mobile to petrographic province territory to be broken, make brokenly rock operating area
(3) being positioned at the top in petrographic province territory to be broken, the broken rock operating area (3) of described broken rock machine is through brokenly rock railcar body and and ground
Perpendicular hollow area；
B, operation rock arm (1), control the broken petrosa on rock arm (1) at broken rock operating area (3) downward actuation；
C, the broken petrosa of rock arm (1) carry out brokenly rock to the rock in broken rock operating area (3).
2. a kind of rock breaking method as claimed in claim 1, it is characterised in that: in described step A, broken rock operating area (3)
It is positioned at behind the top in broken petrographic province territory, by hydraulic support mechanism, broken rock machine is supported.
3. a kind of rock breaking method as claimed in claim 1, it is characterised in that: in described step A, do not move at broken rock machine
Under premise, the area of broken rock operating area (3) is 7 50 square metres.
4. a kind of rock breaking method as according to any one of claim 13, it is characterised in that: described broken rock machine includes rock
Arm (1) and car body, described car body includes walking mechanism, vehicle frame (4) and contiguous block (2), and vehicle frame (4) is symmetricly set on walking mechanism
On, contiguous block (2) is fixed between vehicle frame (4), and described broken rock operating area (3) refers to vehicle frame (4) and contiguous block (2) within it
The hollow area that side is formed, described rock arm (1) is connected on contiguous block (2), and the broken petrosa of rock arm (1) is by controlling machine
Structure can move freely in broken rock operating area (3).
5. a kind of rock breaking method as claimed in claim 4, it is characterised in that: described contiguous block is provided with mass in (2).
6. a kind of rock breaking method as claimed in claim 4, it is characterised in that: described contiguous block is provided with maintenance breach on (2)
(7).
7. a kind of rock breaking method as claimed in claim 4, it is characterised in that: described rock arm (1) is connected to by rotating shaft
Connect on block (2).
8. a kind of rock breaking method as claimed in claim 4, it is characterised in that: described contiguous block (2) is by bolt and vehicle frame (4)
Fixing connection.
9. a kind of rock breaking method as claimed in claim 4, it is characterised in that: described walking mechanism includes two set crawler travel machines
Structure (8), vehicle frame (4) is symmetrically connected on two set creepers undercarriage (8).
10. a kind of rock breaking method as claimed in claim 4, it is characterised in that: described walking mechanism includes four set crawler travels
Mechanism (8), vehicle frame (4) is symmetrically connected on four set creepers undercarriage (8).
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610660208.5A CN106285670A (en) | 2016-08-12 | 2016-08-12 | A kind of rock breaking method |
| CN201710276922.9A CN106979010B (en) | 2016-08-12 | 2017-04-25 | Vehicle body, rock breaker and rock breaking method |
| US16/325,050 US11047234B2 (en) | 2016-08-12 | 2017-08-01 | Vehicle body utilized in rockbreaker, rockbreaker and rock breaking method |
| EP17838607.4A EP3514323A4 (en) | 2016-08-12 | 2017-08-01 | Vehicle body utilized in rockbreaker, rockbreaker, and rock breaking method |
| PCT/CN2017/095487 WO2018028477A1 (en) | 2016-08-12 | 2017-08-01 | Vehicle body utilized in rockbreaker, rockbreaker, and rock breaking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610660208.5A CN106285670A (en) | 2016-08-12 | 2016-08-12 | A kind of rock breaking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106285670A true CN106285670A (en) | 2017-01-04 |
Family
ID=57669922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610660208.5A Pending CN106285670A (en) | 2016-08-12 | 2016-08-12 | A kind of rock breaking method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106285670A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869925A (en) * | 2016-08-12 | 2017-06-20 | 凌夕珈 | A kind of adjustable car body, centre-of-gravity broken rock machine and rock breaking method |
| CN106979010A (en) * | 2016-08-12 | 2017-07-25 | 凌夕珈 | A kind of car body, broken rock machine and rock breaking method |
| WO2018028477A1 (en) * | 2016-08-12 | 2018-02-15 | 成都市猎石者破岩科技有限责任公司 | Vehicle body utilized in rockbreaker, rockbreaker, and rock breaking method |
| CN107975037A (en) * | 2017-11-26 | 2018-05-01 | 上海宝冶集团有限公司 | The construction method that a kind of hard soil and gravel heavily fortified point soil base excavate |
-
2016
- 2016-08-12 CN CN201610660208.5A patent/CN106285670A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869925A (en) * | 2016-08-12 | 2017-06-20 | 凌夕珈 | A kind of adjustable car body, centre-of-gravity broken rock machine and rock breaking method |
| CN106979010A (en) * | 2016-08-12 | 2017-07-25 | 凌夕珈 | A kind of car body, broken rock machine and rock breaking method |
| WO2018028477A1 (en) * | 2016-08-12 | 2018-02-15 | 成都市猎石者破岩科技有限责任公司 | Vehicle body utilized in rockbreaker, rockbreaker, and rock breaking method |
| CN106869925B (en) * | 2016-08-12 | 2019-11-05 | 凌夕珈 | A kind of adjustable car body, centre-of-gravity broken rock machine and rock breaking method |
| CN106979010B (en) * | 2016-08-12 | 2020-04-07 | 凌夕珈 | Vehicle body, rock breaker and rock breaking method |
| US11047234B2 (en) | 2016-08-12 | 2021-06-29 | Chengdu Lieshizhe Rock-Breaking Technology Llc | Vehicle body utilized in rockbreaker, rockbreaker and rock breaking method |
| CN107975037A (en) * | 2017-11-26 | 2018-05-01 | 上海宝冶集团有限公司 | The construction method that a kind of hard soil and gravel heavily fortified point soil base excavate |
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Application publication date: 20170104 |