CN113565505B - Rock hydraulic rock breaking process capable of continuously splitting at multiple points in drilled hole - Google Patents
Rock hydraulic rock breaking process capable of continuously splitting at multiple points in drilled hole Download PDFInfo
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- CN113565505B CN113565505B CN202110777152.2A CN202110777152A CN113565505B CN 113565505 B CN113565505 B CN 113565505B CN 202110777152 A CN202110777152 A CN 202110777152A CN 113565505 B CN113565505 B CN 113565505B
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- 239000011435 rock Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000008569 process Effects 0.000 title claims abstract description 16
- 238000005553 drilling Methods 0.000 claims abstract description 45
- 239000003921 oil Substances 0.000 claims description 90
- 239000010720 hydraulic oil Substances 0.000 claims description 15
- 230000000712 assembly Effects 0.000 claims description 11
- 238000000429 assembly Methods 0.000 claims description 11
- 238000003776 cleavage reaction Methods 0.000 claims description 5
- 230000007017 scission Effects 0.000 claims description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 241001272720 Medialuna californiensis Species 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/06—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
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Abstract
A rock hydraulic rock breaking process capable of continuously splitting at multiple points in a borehole comprises the following steps: A. drilling holes; B. the oil way is connected; C. splitting a gun access hole; D. splitting the orifice; E. lowering a splitting gun; G. judging whether the hole bottom is split or not; H. a hole is formed in the splitting gun; switching the next borehole; according to the invention, a splitting gun based on a multistage serial hydraulic cylinder is fully inserted into a drill hole, and a splitting front support is extruded to transversely expand to apply splitting force to the inner wall of the drill hole at an orifice part; when the tensile stress caused by the splitting force in the rock exceeds the tensile strength of the rock, the rock at the orifice part is split to generate cracks, the splitting gun can overcome the defect that the existing splitting gun cannot extend into the drill hole, and can realize continuous multipoint splitting and deepening of splitting depth in the same drill hole so as to improve the splitting and breaking efficiency.
Description
Technical Field
The invention belongs to the technical field of construction processes for carrying out non-blasting crushing on rock by adopting a hydraulic fracturing method, and particularly relates to a rock hydraulic fracturing process capable of continuously and multi-point fracturing in a drilled hole.
Background
At present, the general process of breaking rock by using a hydraulic fracturing gun is as follows: (1) Drilling a plurality of drilling holes with proper intervals on the surface of the excavated rock by adopting a drilling machine, wherein the diameter of each drilling hole is slightly larger than the maximum size of the cross section of the splitting head, and the depth is generally not more than 50cm; (2) Inserting a splitting head (the splitting head comprises a middle wedge block and two half-moon-shaped splitting blocks) of a splitting gun into a drilling hole, and connecting an oil pump with the splitting gun by adopting an oil pipe; (4) Starting an oil pump, opening an oil way switch, and pushing the middle wedge block of the splitting head to extend forwards by an oil cylinder piston; (5) The middle wedge blocks extend out and simultaneously squeeze the split blocks at two sides to expand to the side face so as to apply lateral splitting force to the wall of the drilling hole; (6) When the lateral splitting force causes the tensile stress inside the rock to exceed the tensile strength of the rock, the rock is split and broken, and the splitting depth is slightly larger than the drilling depth.
The construction process of the hydraulic splitting gun at the current stage can show that the splitting gun can only insert the splitting head into the drill hole, and the splitting depth is very limited due to the limited length of the splitting head, so that the rock breaking efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a rock hydraulic rock breaking process capable of continuously and multi-point splitting in a drill hole.
The technical scheme adopted for solving the technical problems is as follows: a rock hydraulic rock breaking process capable of continuously splitting at multiple points in a borehole comprises the following steps:
A. drilling: pre-drilling a plurality of drilling holes on the surface of the rock by adopting a drilling machine, wherein the hole diameter is larger than the outer diameter of a splitting gun based on a multistage serial hydraulic cylinder;
B. and (3) oil way connection: connecting a splitting gun based on a multistage serial hydraulic cylinder with a hydraulic pump station on the ground beside a drilling hole;
C. splitting gun access hole: inserting a splitting gun into an orifice part in the drill hole in a mechanical or manual mode, and adjusting the angle of the splitting gun in the horizontal direction in the hole according to the blank face shape to ensure that the expansion direction of the splitting front support is perpendicular to the connecting line direction of the drill hole or the trend direction of the blank face;
D. aperture cleavage: opening a hydraulic pump station, opening an oil inlet valve, enabling hydraulic oil to enter oil inlet cavities of all sub-cylinders through oil inlet pipelines, enabling a middle wedge block of a splitting gun to extend outwards under the pushing of piston rod assemblies of all the sub-cylinders, and simultaneously extruding a splitting front support to transversely expand so as to apply splitting force to the inner wall of a drilling hole at an orifice part;
E. lowering the splitting gun: opening an oil return valve, enabling hydraulic oil to enter a return cavity of each sub oil cylinder through an oil return pipeline, retracting a wedge block, separating a front support from a drilling hole wall, and moving a splitting gun downwards for a certain distance;
F. the following point is split: opening an oil inlet valve, repeating the step D, generating a crack at a second splitting point in the drill hole, and communicating the crack with the first splitting point of the orifice;
G. judging whether the hole bottom is split or not: if yes, turning to the step H; if not, repeating the step E, F until a macroscopic fracture surface is generated in the depth range of the whole drilling hole;
H. hole of splitting gun: opening an oil return valve, enabling hydraulic oil to enter a return cavity of each sub-oil cylinder through an oil return pipeline, returning a piston rod assembly in each sub-oil cylinder of the splitting gun under the action of the hydraulic oil, pulling a wedge block to return to an initial position, separating a front support from a drilling hole wall during splitting, and then lifting the splitting gun out of a drilling hole in a mechanical or manual mode so as to finish the current drilling hole splitting flow;
I. switching the next borehole: the B, C, D, E, F, G, H steps are repeated.
The rear part of the tail end cylinder barrel is provided with two groups of first quick release joints, one group of first quick release joints are communicated with an oil return pipeline, the other group of first quick release joints are communicated with an oil inlet pipeline, a tail end piston rod assembly is arranged in the tail end cylinder barrel, at least one group of middle cylinder barrels are arranged between the tail end cylinder barrel and the front end cylinder barrel, a front end piston rod assembly is arranged in the front end cylinder barrel, middle piston rod assemblies are arranged in the middle cylinder barrel, a piston rod of the tail end piston rod assembly is communicated with a piston of the head group of middle piston rod assemblies, the piston rods of the rest middle piston rod assemblies are communicated with the head and the tail of the piston, the piston rod of the tail group of middle piston rod assemblies is communicated with the piston of the front end piston rod assembly, the front end cylinder barrel is provided with a front end cover, the front end cover is connected with a front support guide cylinder, one end of the wedge is connected with the piston rod of the front end piston rod assembly extending out of the front end cover, the other end extends into a front support fixed on the front support guide cylinder barrel through a fixed pin, the oil inlet pipeline is arranged in the tail end piston rod assembly and the middle piston rod assembly, and the oil return pipeline is arranged in the front end cylinder barrel, the middle cylinder barrel and the middle cylinder barrel wall is arranged in the middle.
The front end cylinder barrel, the middle cylinder barrel and the tail end cylinder barrel have the same outer diameter and the same maximum size as the cross section of the split front support.
The front cylinder, the middle cylinder and the tail cylinder are equal in length and cross section area, and the strokes of the piston assemblies corresponding to the cylinders are equal.
The front splitting support is two half-moon splitting blocks connected through a return spring, and a wedge block is inserted into the middle parts of the two half-moon splitting blocks.
The middle cylinder barrel of the invention is as follows: the middle cylinder body is hollow cylinder, the left end internal processing of middle cylinder body has the step hole, the right-hand member processing has the installation arch, the protruding external processing of installation has first packing ring groove, the internal processing has the piston rod mounting hole, the protruding inside piston rod mounting hole of installation has the second packing ring groove with the processing of piston rod contact department, the middle cylinder body has the oil return port hole with the protruding internal processing of installation, the one end opening of oil return hole is located the bellied right-hand member of installation, the other end opening is located the right-hand member of middle cylinder body left end inner wall and is located the step hole.
The front end cylinder barrel and the middle cylinder barrel have the same structure.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, a splitting gun based on a multistage serial hydraulic cylinder is fully inserted into a drill hole, and a splitting front support is extruded to transversely expand to apply splitting force to the inner wall of the drill hole at an orifice part; when the tensile stress caused by the splitting force in the rock exceeds the tensile strength of the rock, the rock at the orifice part is split to generate cracks, the splitting gun can overcome the defect that the existing splitting gun cannot extend into the drill hole, the whole splitting gun comprising the oil cylinder and the splitting head can be completely inserted into the drill hole matched with the oil cylinder and the splitting head, continuous splitting of the rock at different depth parts of a single drill hole along with the change of the depth of the splitting gun in the depth range of the drill hole can be realized, and the aim of continuously splitting at multiple points in the same drill hole and deepening the splitting depth to improve the splitting and breaking efficiency can be fulfilled.
2. The splitting gun of the invention adopts the steps that the sub-cylinders of each stage are connected in series, the lengths and the cross sections of the front cylinder barrel, the middle cylinder barrel and the tail cylinder barrel are equal, the strokes of the piston assemblies corresponding to the cylinders are equal, the output load is provided by the multi-stage serial hydraulic cylinders, the output load is the sum of the loads of the sub-cylinders, the splitting of the rock and other materials is carried out by adopting the pushing wedge splitting principle, and the wedge splitting thrust is increased.
Drawings
FIG. 1 is a schematic view of an orifice split of the present invention.
FIG. 2 is a schematic view of a first cleavage point according to the present invention.
FIG. 3 is a schematic view of a second cleavage point according to the present invention.
Fig. 4 is a schematic structural view of the present invention.
Fig. 5 is a cross-sectional view A-A of fig. 4.
Fig. 6 is a B-B cross-sectional view of fig. 4.
Fig. 7 is a schematic view of the structure of the intermediate cylinder 7 in fig. 6.
In the figure: 1. splitting a front support; 2. wedge blocks; 3. a front support guide cylinder; 4. a front end cap; 5. a front cylinder; 6. a front end piston rod assembly; 7. a middle cylinder; 8. an intermediate piston rod assembly; 9. a tail end cylinder; 10. a trailing end piston rod assembly; 11. a first quick release connector; 12. a fixing pin; 13. a return spring; 7-1, a middle cylinder body; 7-2, mounting the bulge; a. an oil return hole; b. a first gasket groove; c. a second gasket groove; d. a piston rod mounting hole; e. a stepped hole.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, but the present invention is not limited to these examples.
Example 1
In fig. 1 to 3, the invention relates to a rock hydraulic rock breaking process capable of continuously splitting at multiple points in a borehole, which comprises the following steps:
A. drilling: pre-drilling a plurality of drilling holes on the surface of the rock by adopting a drilling machine, wherein the hole diameter is larger than the outer diameter of a splitting gun based on a multistage serial hydraulic cylinder;
B. and (3) oil way connection: connecting a splitting gun based on a multistage serial hydraulic cylinder with a hydraulic pump station on the ground beside a drilling hole;
C. splitting gun access hole: inserting a splitting gun into an orifice part in a drilling hole in a mechanical or manual mode, and adjusting the angle of the splitting gun in the horizontal direction in the hole according to the blank face shape to ensure that the expansion direction of the splitting front support (1) is vertical to the connecting line direction of the drilling hole or the trend direction of the blank face;
D. aperture cleavage: opening a hydraulic pump station, opening an oil inlet valve, enabling hydraulic oil to enter an oil inlet cavity of each sub-oil cylinder through an oil inlet pipeline, enabling a middle wedge block (2) of a splitting gun to extend outwards under the pushing of a piston rod assembly of each sub-oil cylinder, and simultaneously extruding a splitting front support (1) to transversely expand to apply splitting force to the inner wall of a drilling hole at an orifice part; when the tensile stress caused by the splitting force in the rock exceeds the tensile strength of the rock, the rock at the orifice part is split to generate cracks.
E. Lowering the splitting gun: opening an oil return valve, enabling hydraulic oil to enter a return cavity of each sub-oil cylinder through an oil return pipeline, retracting a wedge block (2), separating a splitting front support (1) from a drilling hole wall, and downwards moving a splitting gun for a certain distance;
F. the following point is split: opening an oil inlet valve, repeating the step D, generating a crack at a second splitting point in the drill hole, and communicating the crack with the first splitting point of the orifice;
G. judging whether the hole bottom is split or not: if yes, turning to the step H; if not, repeating the step E, F until a macroscopic fracture surface is generated in the depth range of the whole drilling hole;
H. hole of splitting gun: opening an oil return valve, enabling hydraulic oil to enter a return cavity of each sub-oil cylinder through an oil return pipeline, returning a piston rod assembly in each sub-oil cylinder of the splitting gun under the action of the hydraulic oil, pulling a wedge block (2) to return to an initial position, separating a splitting front support (1) from a drilling hole wall, and then lifting the splitting gun out of the drilling hole in a mechanical or manual mode so as to finish the current drilling hole splitting flow;
I. switching the next borehole: the B, C, D, E, F, G, H steps are repeated.
In fig. 4 to 7, the output load of the splitting gun based on the multistage serial hydraulic oil cylinders is provided by the multistage serial hydraulic oil cylinders, the output load is the sum of the loads of a plurality of sub-oil cylinders, and the splitting principle of pushing wedge blocks is adopted to split materials such as rock; the motion of all piston rod assemblies is the same-direction superposition motion, namely, the wedge block 2 is pushed to the left to split rocks at the same time, or the wedge block is moved to the right to reset after splitting. Further, in order to ensure the serial effect, the outer diameters of all the sub-cylinders connected in series are the same and are equal to the maximum size of the cross section of the splitting head; i.e. the outer diameters of the front cylinder 5 and the middle cylinder 7 and the rear cylinder 9 are the same and equal to the maximum dimension of the cross section of the split front stay 1. The lengths and the cross sectional areas of the front cylinder 5, the middle cylinder 7 and the tail cylinder 9 are equal, and the strokes of the piston assemblies corresponding to the cylinders are equal. The piston rod assembly consists of a piston rod and a piston, the piston divides the cylinder barrel into a left end space and a right end space, the right end space is communicated with an oil inlet pipeline, the left end space is communicated with an oil return pipeline, and the piston assembly is pushed to move back and forth by controlling oil inlet and outlet of the oil inlet pipeline and the oil return pipeline so as to drive other parts to move.
In the embodiment, two groups of first quick release joints 11 are installed at the rear part of a tail end cylinder barrel 9, one group of first quick release joints 11 are communicated with an oil return pipeline, the other group of first quick release joints 11 are communicated with the oil inlet pipeline, the tail end cylinder barrel 9 is of a hollow cylindrical structure, a tail end piston rod assembly 10 is internally installed in the tail end cylinder barrel 9, at least one group of middle cylinder barrels 7 are installed between the tail end cylinder barrel 9 and a front end cylinder barrel 5, the number of the middle cylinder barrels 7 is set according to the specific working condition of rocks required to be split, the embodiment is described by installing only 1 group of middle cylinder barrels 7, a middle piston rod assembly 8 is internally installed in the middle cylinder barrel 7, the middle cylinder barrel 7 is integrally formed by connecting a middle cylinder barrel body 7-1 and a mounting bulge 7-2, the middle cylinder barrel body 7-1 is of a hollow cylinder body, a step hole e is formed in the inner left end of the middle cylinder barrel body 7-1, a mounting bulge 7-2 is formed in the inner end of the middle cylinder barrel body, a first gasket c and a gasket c are internally machined in the inner side of the middle cylinder barrel body, a second gasket c and a gasket c is arranged at the inner end of the middle cylinder barrel 7-2, the inner wall of the gasket c is located at the inner end of the middle bulge 7-2 is located at the opening of the middle end of the piston rod assembly opening of the middle gasket c, and the gasket c is located at the inner end of the left end of the middle bulge 7-2.
The front end cylinder 5 and the intermediate cylinder 7 of this embodiment are identical in structure. The front end cylinder 5 internally mounted has front end piston rod subassembly 6, and the piston rod of tail end piston rod subassembly 10 is linked together with the piston of first group middle piston rod subassembly 8, and the piston rod of each other middle piston rod subassemblies 8 is linked together with the piston head and the tail, and the piston rod of last group middle piston rod subassembly 8 is linked together with the piston of front end piston rod subassembly 6, and front end cover 4 is installed to front end cylinder 5 front portion, and front end cover 4 seals front end cylinder 5, prevents that hydraulic oil from revealing. The front end cover 4 is connected with the front support guide cylinder 3, the front support guide cylinder 3 is of a hollow cylindrical structure, the outer diameter of the front support guide cylinder 3 is the same as the outer diameter of each sub-cylinder, the wedge block 2 is installed in the front support guide cylinder 3, one end of the wedge block 2 is connected with a piston rod of a front end piston rod assembly 6 extending out of the front end cover 4, the other end of the wedge block 2 extends into a splitting front support 1 fixed on the front support guide cylinder 3 through a fixing pin 12, the splitting front support 1 in the embodiment is two half-moon splitting blocks connected through a return spring 13, the wedge block 2 is inserted into the middle parts of the two half-moon splitting blocks, the wedge block 2 is gradually wedged into the two half-moon splitting blocks under the thrust action of each piston rod assembly, so that the two half-moon splitting blocks are spread towards two sides, rock splitting is further carried out, and the return spring 13 ensures that the two half-moon splitting blocks are reset after splitting is completed.
The oil inlet pipeline of this embodiment is processed inside tail end piston rod assembly 10 and middle piston rod assembly 8, and the processing of piston rod left end of each piston rod assembly has the oil outlet, and the oil outlet is linked together with the inside oil inlet pipeline of piston rod assembly, and oil inlet pipeline is given tail end cylinder 9's right-hand member and oil inlet pipeline oil feed earlier, and the oil that gets into oil inlet pipeline is given middle cylinder 7 in proper order through each oil outlet, and the right-hand member space oil feed of front end cylinder 5, and then promotes each piston rod assembly and move left, finally overlaps the effort that each piston rod assembly applyed on voussoir 2, increases the thrust of voussoir 2 and removes split rock. The oil return pipeline is processed in front end cylinder 5, middle cylinder 7, tail end cylinder 9 cylinder wall is inside, oil return pipeline one end in the tail end cylinder 9 cylinder wall is located tail end cylinder right-hand member, the other end is located tail end cylinder 9 inner wall left end and tail end cylinder 9's left end space is linked together, oil return pipeline one end in middle cylinder 7 cylinder wall is located middle cylinder 7 right-hand member and is linked together with tail end cylinder 9's left end space, the other end is located middle cylinder 7's inner wall left end and middle cylinder 7's left end space is linked together, oil return pipeline one end in the cylinder wall of front end cylinder 5 is located front end cylinder 5 right-hand member and is linked together with middle cylinder 7's left end space, the other end is located front end cylinder 5's inner wall left end and front end cylinder 5's left end space, each piston rod unit is when moving leftwards, each cylinder left end space is reduced, oil passes through front end cylinder 5 in proper order through the left end oil return hole, middle cylinder 7, tail end cylinder 9 gets into oil return pipeline to first quick-operation joint 11, each cylinder unit is right-hand member left end space is increased, oil passes through right end oil return hole in proper order through tail end cylinder 9, middle cylinder 7, oil return pipeline left end cylinder 5 gets into each cylinder space to each cylinder left end cylinder.
Claims (7)
1. A hydraulic rock breaking process capable of continuously splitting at multiple points in a drilled hole, which is characterized by comprising the following steps:
A. drilling: pre-drilling a plurality of drilling holes on the surface of the rock by adopting a drilling machine, wherein the hole diameter is larger than the outer diameter of a splitting gun based on a multistage serial hydraulic cylinder;
B. and (3) oil way connection: connecting a splitting gun based on a multistage serial hydraulic cylinder with a hydraulic pump station on the ground beside a drilling hole;
C. splitting gun access hole: inserting a splitting gun into an orifice part in a drilling hole in a mechanical or manual mode, and adjusting the angle of the splitting gun in the horizontal direction in the hole according to the blank face shape to ensure that the expansion direction of the splitting front support (1) is vertical to the connecting line direction of the drilling hole or the trend direction of the blank face;
D. aperture cleavage: opening a hydraulic pump station, opening an oil inlet valve, enabling hydraulic oil to enter an oil inlet cavity of each sub-oil cylinder through an oil inlet pipeline, enabling a middle wedge block (2) of a splitting gun to extend outwards under the pushing of a piston rod assembly of each sub-oil cylinder, and simultaneously extruding a splitting front support (1) to transversely expand to apply splitting force to the inner wall of a drilling hole at an orifice part;
E. lowering the splitting gun: opening an oil return valve, enabling hydraulic oil to enter a return cavity of each sub-oil cylinder through an oil return pipeline, retracting a wedge block (2), separating a splitting front support (1) from a drilling hole wall, and downwards moving a splitting gun for a certain distance;
F. the following point is split: opening an oil inlet valve, repeating the step D, generating a crack at a second splitting point in the drill hole, and communicating the crack with the first splitting point of the orifice;
G. judging whether the hole bottom is split or not: if yes, turning to the step H; if not, repeating the step E, F until a macroscopic fracture surface is generated in the depth range of the whole drilling hole;
H. hole of splitting gun: opening an oil return valve, enabling hydraulic oil to enter a return cavity of each sub-oil cylinder through an oil return pipeline, returning a piston rod assembly in each sub-oil cylinder of the splitting gun under the action of the hydraulic oil, pulling a wedge block (2) to return to an initial position, separating a splitting front support (1) from a drilling hole wall, and then lifting the splitting gun out of the drilling hole in a mechanical or manual mode so as to finish the current drilling hole splitting flow;
I. switching the next borehole: the B, C, D, E, F, G, H steps are repeated.
2. The hydraulic rock breaking process capable of continuously splitting at multiple points in a drill hole according to claim 1, wherein the splitting gun based on the multistage serial hydraulic cylinders is characterized in that: the rear part of the tail cylinder barrel (9) is provided with two groups of first quick release joints (11), one group of first quick release joints (11) is communicated with an oil return pipeline, the other group of first quick release joints (11) is communicated with an oil inlet pipeline, the tail cylinder barrel (9) is internally provided with a tail piston rod assembly (10), at least one group of middle cylinder barrels (7) are arranged between the tail cylinder barrel (9) and the front cylinder barrel (5), the front cylinder barrel (5) is internally provided with a front piston rod assembly (6), the middle cylinder barrel (7) is internally provided with a middle piston rod assembly (8), the piston rod of the tail piston rod assembly (10) is communicated with the piston of the first group of middle piston rod assemblies (8), the piston rod of each other middle piston rod assembly (8) is communicated with the piston head and the tail of the piston, the front cylinder barrel assembly (6), the front part of the front cylinder barrel (5) is provided with a front end cover (4), the front end cover (4) is connected with a front support guide cylinder barrel (3), the front support guide cylinder barrel (3) is internally provided with a wedge block (2), the piston rod (2) is fixedly connected with the front end of the front support guide cylinder (3) through a front end cover (12) extending out of the front end support guide cylinder barrel (6), the oil inlet pipeline is arranged inside the tail end piston rod assembly (10) and the middle piston rod assembly (8), and the oil return pipeline is arranged inside the front end cylinder barrel (5), the middle cylinder barrel (7) and the tail end cylinder barrel (9).
3. A hydraulic rock breaking process for continuous multipoint splitting in a borehole according to claim 2, wherein: the outer diameters of the front end cylinder barrel (5), the middle cylinder barrel (7) and the tail end cylinder barrel (9) are the same and are equal to the maximum size of the cross section of the splitting front support (1).
4. A hydraulic rock breaking process for continuous multipoint splitting in a borehole according to claim 2, wherein: the lengths and the cross sections of the front end cylinder barrel (5), the middle cylinder barrel (7) and the tail end cylinder barrel (9) are equal, and the strokes of the piston rod assemblies corresponding to the cylinders are equal.
5. A hydraulic rock breaking process for continuous multipoint splitting in a borehole according to claim 2, wherein: the splitting front support (1) is two half-moon-shaped splitting blocks connected through a return spring (13), and the wedge block (2) is inserted into the middle parts of the two half-moon-shaped splitting blocks.
6. A rock hydraulic breaking process capable of continuous multipoint splitting in a borehole according to claim 2, characterized in that the intermediate cylinder (7) is: the middle cylinder body (7-1) is a hollow cylinder, a step hole (e) is formed in the left end of the middle cylinder body (7-1), a mounting boss (7-2) is formed in the right end of the middle cylinder body, a first gasket groove (b) is formed in the outer portion of the mounting boss (7-2), a piston rod mounting hole (d) is formed in the inner portion of the mounting boss (7-2), a second gasket groove (c) is formed in the contact position of the piston rod mounting hole (d) and the piston rod, an oil return hole (a) is formed in the middle cylinder body (7-1) and the mounting boss (7-2), an opening at one end of the oil return hole (a) is located at the right end of the mounting boss (7-2), and an opening at the other end of the oil return hole is located on the inner wall of the left end of the middle cylinder body (7-1) and located at the right end of the step hole (e).
7. A hydraulic rock breaking process for continuous multipoint splitting in a borehole according to claim 2, wherein: the front end cylinder barrel (5) and the middle cylinder barrel (7) are identical in structure.
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| CN114413695B (en) * | 2022-01-20 | 2024-03-15 | 叶澄 | Static hydraulic blasting device and construction process thereof |
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