CN116793172A - Roadway tunneling energy-gathering hydraulic smooth blasting peripheral hole charging method - Google Patents
Roadway tunneling energy-gathering hydraulic smooth blasting peripheral hole charging method Download PDFInfo
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- CN116793172A CN116793172A CN202310929037.1A CN202310929037A CN116793172A CN 116793172 A CN116793172 A CN 116793172A CN 202310929037 A CN202310929037 A CN 202310929037A CN 116793172 A CN116793172 A CN 116793172A
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- 238000005422 blasting Methods 0.000 title claims abstract description 65
- 230000002093 peripheral effect Effects 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000005641 tunneling Effects 0.000 title claims abstract description 16
- 239000002360 explosive Substances 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 230000000977 initiatory effect Effects 0.000 claims abstract description 20
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 239000002390 adhesive tape Substances 0.000 claims abstract description 4
- 238000004880 explosion Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 20
- 239000003814 drug Substances 0.000 abstract description 5
- 238000005553 drilling Methods 0.000 abstract description 2
- 229940079593 drug Drugs 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 8
- 238000009412 basement excavation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The application discloses a roadway tunneling energy-gathering hydraulic pressure smooth blasting peripheral hole charging method, which comprises the following steps: 1) Placing the tip of the energy-gathering cover into the slit pipe towards the direction of the cartridge, and clamping the bottom opening of the energy-gathering cover at a boss of a limit structure in the slit pipe; 2) The explosive cartridge is inserted into the slit pipe from the end of the slit pipe, which is not provided with the energy gathering cover, and the bottom of the explosive cartridge is abutted to the top tip of the energy gathering cover; 3) And (3) preparing an initiating explosive: and inserting the initiating detonator into the cartridge from the open end of the cartridge, and fixing the initiating detonator by using an adhesive tape to obtain the initiating explosive. The method adopts Kong Nala long grain and water pressure energization, the energy of the front end of the blast hole is uniformly distributed, drilling small holes do not need to be inserted, and the joint cutting energy gathering effect is added, so that the distance between the large holes can be increased, the number of the peripheral holes is reduced by more than 30%, and the single-hole drug loading quantity of the peripheral holes is reduced by 25%.
Description
Technical Field
The application relates to the technical field of blasting charge, in particular to a tunnel tunneling energy-gathering hydraulic smooth blasting peripheral hole charge method.
Background
In the conventional tunnel excavation, energy gathering and spaced charging are not generally adopted, but the conventional smooth blasting energy is too concentrated to form a contour with larger surrounding rock damage, the contour is not easy to form, the dust content after blasting is high, and in the conventional blasting excavation operation, the surrounding rock is broken and the tunnel contour is not obvious.
In blasting engineering, in order to realize directional fracture blasting of rock mass, certain measures, such as energy collecting devices and spaced charging, need to be taken when charging peripheral holes. As disclosed in CN 201921126909.6, the device has the characteristics of easy operation, small investment and high precision, solves the problems of inaccurate centering and low positioning precision caused by positioning of operators during centering of the slit pipe in the conventional peripheral hole, more effectively improves the blasting quality of the peripheral hole, and improves the blasting effect of the tunnel energy-gathering smooth surface blasting.
In the prior art, an explosive filling gun is required to be used for filling explosive into a kerf pipe on site, the explosive filling time is long, the process flow is complicated, the operation is not in accordance with the specification, potential safety hazards exist, the explosive filling diameter of manual explosive filling is uncontrollable, and explosion rejection is possible.
When the air space charging is used, the set air space distance is often determined by only field workers through feeling, the charging result easily influences the density of the linear charging, the blasting effect cannot reach the design requirement, and the blasting effect is influenced.
Disclosure of Invention
Aiming at the technical problems, the application provides a roadway tunneling energy-gathering hydraulic smooth blasting peripheral hole charging method, which is characterized in that on the basis of the traditional smooth blasting technology, the energy is gathered in a directional manner during explosive explosion by utilizing the improved slit pipe and water bag interval, and the light explosion effect is obvious.
The application provides a roadway tunneling energy-gathering hydraulic pressure smooth blasting peripheral hole charging method, which comprises the following steps:
1) Placing the tip of the energy-gathering cover into the slit pipe towards the direction of the cartridge, and clamping the bottom opening of the energy-gathering cover at a boss of a limit structure in the slit pipe;
2) The explosive cartridge is inserted into the slit pipe from the end of the slit pipe, which is not provided with the energy gathering cover, and the bottom of the explosive cartridge is abutted to the top tip of the energy gathering cover;
3) And (3) preparing an initiating explosive: inserting an initiating detonator into the cartridge from the open end of the cartridge, and fixing the initiating detonator by using an adhesive tape to obtain an initiating explosive;
4) The bottom open end of the energy gathering cover in the primary explosive is arranged towards the outer direction of the hole, the primary explosive is put into the hole bottom of the tunnel tunneling energy gathering hydraulic smooth blasting peripheral hole, a water bag is arranged between any two adjacent primary explosive, and a plurality of primary explosive and a plurality of water bags are used for filling the blasting hole;
5) Filling stemming on the orifice of the blast hole to finish explosive filling;
slits with the width of 4mm are symmetrically arranged on two opposite side walls of the slit pipe; a limit structure boss is arranged in one end of the joint cutting pipe;
the energy gathering cover is conical; the diameter of the widest part of the energy gathering cover is smaller than the inner diameter of the slitting pipe and larger than the inner diameter of the boss;
the slit pipe is a PVC pipe; the energy gathering cover is made of metal aluminum material.
Preferably, the boss extends horizontally from the inner wall of the lancing tube to the central axis of the lancing tube; the width of the boss is 1mm.
Preferably, the energy concentrating shield comprises: a convex ring and a tip; a tip is arranged at one end of the energy gathering cover; an opening is arranged at the other end of the energy gathering cover, and a convex ring is outwards arranged on the outer side wall of the opening.
Preferably, in the step 1), the energy gathering cover slides into the slit pipe from the top end of the slit pipe and is abutted with the boss at the bottom of the slit pipe.
Preferably, the tip of the energy concentrating cap is disposed in a direction pointing to the status pack within the slit tube.
Preferably, the two sides of the kerf pipe are symmetrically provided with kerf structures, so that the balance of the wall of the gun hole in the initial stage of explosion is changed, and the stress during explosion is concentrated in the blasting holes around the kerf structures to form directional cracks.
The application has the beneficial effects that:
1) According to the roadway tunneling energy-gathering hydraulic smooth blasting peripheral hole charging method, the charging structure of the peripheral hole is changed after the slit pipe and the energy gathering cover are arranged, and the through groove is arranged on the side wall of the slit pipe, so that the directional energy gathering effect is generated on the energy during explosive explosion, and the light explosion effect is more obvious; meanwhile, the detonating cord cost is saved after the energy gathering cover is used; the water bags are used for filling medicines at intervals, so that the interval distance is more controllable, the medicine column is lengthened, the medicine loading quantity is saved, the energy distribution is more uniform during blasting, the effect that water is incompressible to form a water wedge during blasting is fully utilized, the dust concentration inhibition effect of water vapor after blasting is achieved, and the blasting effect is enhanced.
2) The tunnel tunneling energy-gathering hydraulic smooth blasting peripheral hole charging method provided by the application is based on energy gathering blasting, smooth blasting and hydraulic blasting, comprehensively considers engineering sites, uniformly and properly charged (elongated grains) and reasonably distributed holes are key for controlling peripheral super-undermining, and when the surrounding rock property is poor, the photo-blasting effect of the energy gathering hydraulic smooth blasting peripheral hole charging method is obviously superior to that of the traditional smooth blasting, and the half hole rate formed by excavation is high, the wall surface is complete and the super-undermining is small. The explosive and the water bag are used for filling at intervals, the explosive is positioned in the blast hole more accurately, and meanwhile, the process of binding the explosive and the detonating cord is omitted. Kong Nala long grain and water pressure energy increase, the energy at the front end of the blast hole is uniformly distributed, drilling small holes do not need to be inserted, and the hole spacing can be enlarged by adding the lancing energy gathering function, the number of peripheral holes is reduced by more than 30%, and the single-hole charge capacity of the peripheral holes is reduced by 25%.
3) The tunnel tunneling energy-gathering hydraulic smooth blasting peripheral hole charging method provided by the application adopts the metal aluminum material to manufacture the energy-gathering cover, and is matched with the water bag interval charging method used by the application, so that the detonating cord explosion propagation is omitted. In order to ensure that the energy gathering cover can realize relay explosion propagation effect, the material of the energy gathering cover is changed, so that the energy gathering jet becomes energy gathering metal jet, and the penetrability distance of the high-energy jet are increased. The cost of detonating cord used in blasting is reduced.
Drawings
FIG. 1 is a schematic diagram of a tunnel excavation energy-gathering hydraulic smooth blasting peripheral hole charging device provided by the application;
FIG. 2 is a schematic view of the slit tube structure of example 1 provided by the present application;
FIG. 3 is a schematic view of the energy concentrating hood of example 1 according to the present application;
fig. 4 is a schematic flow chart of a charging structure of a tunnel excavation energy-gathering hydraulic smooth blasting peripheral hole in example 2 provided by the application;
legend description:
a slit pipe 1; a focusing cover 2; a boss 22; a kerf structure 21; a top 23; a tip 31; a convex ring 32; a primer 41; an initiation charge 42; a water bag 43; stemming 44.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, based on the embodiments of the application, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the application.
The technical means which are not described in detail and are not used for solving the technical problems of the application are all arranged according to common general knowledge in the field, and various common general knowledge arrangement modes can be realized.
Referring to fig. 1 to 4, the tunnel tunneling energy-gathering hydraulic pressure smooth blasting peripheral hole charging device provided by the application comprises: the cylindrical slit pipe 1, two symmetrical gaps are arranged on two sides of the cylindrical slit pipe 1, the width of each gap is 4mm, the inner diameter of the bottom of the slit pipe 1 is provided with a limiting structure, and the limiting structure is the fixing position of the energy gathering cover 2.
Further comprises: the conical energy gathering cover 2 is positioned at the limit structure inside the bottom of the cylindrical slit pipe 1, and the diameter of the conical energy gathering cover 2 is slightly smaller than the inner diameter of the cylindrical slit pipe 1.
The cylindrical slit pipe 1 is made of PVC, and the conical energy gathering cover 2 is made of metal aluminum.
The limiting structure is a boss 22 with the thickness of 1mm, the center of the cross section of the joint-cutting pipe 1 is arranged in the direction of the boss 22, the wall thickness of the boss is larger than that of the joint-cutting pipe 1, and the energy gathering cover 2 is abutted with the boss 22.
The bottom of the energy gathering cover 2 expands outwards to form a circular ring shape, and the width of the energy gathering cover is larger than 1mm and is abutted with the limit boss 22 of the slit pipe 1.
The slit pipe 1 is in sliding-in type buckling connection with the energy gathering cover 2, and the energy gathering cover 2 slides into the bottom limit position from the top end of the slit pipe 1.
The method comprises the following specific steps:
1) Directing the tip 31 of the energy concentrating cap 2 towards the cartridge;
2) The energy gathering cover 2 slides from the top end of the kerf pipe 1 to a boss 22 of the limiting structure for clamping;
3) The explosive cartridge is inserted into the kerf pipe 1 from the end of the kerf pipe 1 where the energy gathering cover 2 is not arranged, and the bottom of the explosive cartridge is abutted against the top tip 31 of the energy gathering cover 2;
4) Making an initiating explosive 42: inserting the primer 41 into the cartridge from the open end of the cartridge, and fixing the primer 41 with an adhesive tape to prevent the primer 41 from slipping out, thereby obtaining an primer charge 42;
5) The bottom open end of the energy accumulating cover 2 in the initiating explosive charges 42 is arranged towards the outer direction of the hole, the initiating explosive charges 42 are placed at the bottom of the blast hole, a water bag 43 is arranged between any two adjacent initiating explosive charges 42, and the blast hole is filled with a plurality of initiating explosive charges 42 and a plurality of water bags 43;
6) Stemming 44 is packed over the apertures of the blastholes.
The energy-gathering hydraulic smooth blasting technology combines the advantages of the energy-gathering blasting technology, the hydraulic blasting technology and the smooth blasting technology. The explosive roll and the explosion propagation line in a conventional smooth explosion blast hole are firstly changed into a pvc slit pipe 1, and the explosive roll and the energy gathering cover 2 are combined in the pipe, so that the expansion effect of high-temperature high-pressure gas generated by explosive explosion and the air blade effect of directional high-energy air flow formed by the restraint of the slit pipe 1 can directly act on the hole wall. In addition, the water bags 43 acting at intervals produce a "water wedge" effect under blasting, and these several factors are organically combined and interact at the moment when the rock mass cracks, so that the initial crack is better expanded and extended. The energy gathering cover 2 can generate directional high-energy jet flow in the explosion process, so that the next explosive is detonated, and relay explosion transfer is realized under the condition that detonating cords are not adopted. In addition, because the energy-collecting water pressure smooth blasting blasthole spacing is twice that of smooth blasting blasthole spacing, the in-hole charge uncoupling coefficient is large, so that the disturbance to surrounding rock is small in the use process, and the stability of the surrounding rock is guaranteed in a roadway. Under the impact of blasting, the water bag 43 breaks and generates a large amount of water mist, and in the process of rock drift tunneling, the existence of the water mist reduces the occurrence of dust, simultaneously reduces the temperature in the blast hole, and optimizes the construction operation environment.
Specific example 1:
referring to fig. 1 to 3, a roadway tunneling energy-gathering hydraulic smooth blasting peripheral hole charging device, when using peripheral hole charging, comprises: the cylindrical joint-cutting tube 1, a boss 22 which is abutted against the energy gathering cover 2 is arranged in one end of the joint-cutting tube 1, and two symmetrical joint-cutting structures 21 are arranged on two sides of the joint-cutting tube 1.
When the seam tube 1 and the energy gathering cover 2 are arranged into a split structure, during front-stage assembly of a palm face, the energy gathering cover 2 slides from the top 23 of the seam tube 1 to the boss 22 of the bottom limit structure, and the wider periphery of the bottom opening of the energy gathering cover 2 is abutted in the boss 22.
And then the explosive cartridge is plugged into the slit tube 1 from one end of the slit tube 1 through the slit tube 1, so that the energy accumulating cover 2 is limited in the slit tube 1, and the situation that the energy accumulating cover 2 falls off in the process of placing the initiating explosive 42 into a blast hole is avoided, and stable directional energy accumulating jet can be generated during explosive initiation.
The tip 31 of the energy gathering cover 2 always points to the direction of the medicine bag in the lancing tube 1, so that the energy gathering jet is stably spread outwards. In order to ensure that the energy gathering cover 2 cannot slide out of the bottom of the slit pipe 1, a circle of convex rings 32 are arranged at the bottom of the energy gathering cover 2 and are abutted against the boss 22 of the limiting structure at the bottom of the slit pipe 1, the inner diameter of the boss 22 of the limiting structure is smaller than the inner diameter of the slit pipe 1, the outer diameter of the convex rings 32 of the energy gathering cover 2 is smaller than the inner diameter of the slit pipe 1 and larger than the inner diameter of the boss 22 of the limiting structure, so that the energy gathering cover 2 is stably limited at the bottom of the slit pipe 1, and no position deviation occurs.
The kerf structure 21 is a symmetrical penetrating gap, and mainly changes the balance of the wall of the gun hole in the initial stage of explosion in the process of explosion, so that the stress concentration in the process of explosion is realized, and the formation of directional cracks is promoted; the cutting slit width in the axial direction of the tubular explosive package is used for controlling the concentration of an explosion stress field, the wedge action and the quasi-static action of explosive gas, so that the directional breaking blasting effect of the rock is more obvious.
In the development of a general blasting auxiliary material, PVC materials are used for materials such as slit pipe 1 and slit pipe 1 in order to control costs. In the embodiment, the energy-gathering cover 2 is made of metal aluminum materials, and the detonating cord detonating is omitted by matching with the water bag 43 interval charging method used in the application. In order to ensure that the energy gathering cover 2 can realize relay explosion transfer effect, the material is changed, so that the energy gathering jet can be changed into energy gathering metal jet, and the penetrability distance of the high-energy jet are increased. The cost of detonating cord used in blasting is reduced.
Referring to fig. 4, in a method for charging peripheral holes by tunnel boring and energy-collecting hydraulic smooth blasting, the peripheral holes are charged by water bags 43 at intervals, the water bags 43 need to be filled in advance for preparation, charging devices and explosives are transported to a tunnel face for assembly, and the primary explosive 42 is assembled on site according to the structure in the embodiment 1.
In the case of peripheral hole charging, the primer cap 41 is inserted into the charge of the primer charge 42 and the primer charge 42 is transferred to the bottom of the hole with the stick, with the end of the cap 2 of the primer charge 42 facing the hole orifice.
According to the depth of the blast hole, a proper interval distance is selected to be plugged into the water bag 43, and the water wedge formed by the high-pressure air clusters generated after the explosion of the explosive is larger in transmission energy than the air wedge, so that the rock mass is broken, the energy utilization rate of the explosive is improved, the water has a slow-release energy-reducing effect, the energy utilization rate of the explosive can be improved, and the damage to surrounding rock can be reduced.
When the primary explosive 42 is plugged in again, the next explosive charge with the end of the energy accumulating cover 2 facing the orifice is required to realize relay explosion propagation of the primary explosive 42 from the bottom of the orifice to the orifice.
During charging, the slit of the slit tube 1 is required to strictly follow the profile direction of the section, the placement angle of the slit tube 1 is adjusted according to different positions of the peripheral holes, the cutting direction during explosion is ensured, the directional fracture effect is achieved, and a flat profile surface is formed.
After the primary explosive 42 and the water bag 43 are filled, the stemming 44 is needed to be filled in the hole, and the water bag 43 and the mixed end of the stemming 44 are filled, so that the ineffective dissipation of explosion energy can be further reduced, the energy utilization rate is improved, and the explosive consumption is reduced.
Comparative example:
the difference from example 1 is that: the water bag is not arranged; the energy gathering cover is made of PVC material; only one side of the cut tube is provided with a kerf structure.
The method in the embodiment and the method provided by the comparative example are used for loading the tunnel excavation energy-gathering hydraulic pressure smooth blasting peripheral holes, and then blasting is carried out, and the number of the blasting holes around the blasting points in the method provided by the application is reduced by more than 30% compared with that in the comparative example, and the loading quantity of the blasting holes Kong Nashan holes around the blasting points in the embodiment is reduced by 25%. The energy gathering effect of the method provided by the application is obvious.
Although the present application has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present application.
Claims (6)
1. The tunnel tunneling energy-gathering hydraulic smooth blasting peripheral hole charging method is characterized by comprising the following steps of:
1) Placing the tip of the energy-gathering cover into the slit pipe towards the direction of the cartridge, and clamping the bottom opening of the energy-gathering cover at a boss of a limit structure in the slit pipe;
2) The explosive cartridge is inserted into the slit pipe from the end of the slit pipe, which is not provided with the energy gathering cover, and the bottom of the explosive cartridge is abutted to the top tip of the energy gathering cover;
3) And (3) preparing an initiating explosive: inserting an initiating detonator into the cartridge from the open end of the cartridge, and fixing the initiating detonator by using an adhesive tape to obtain an initiating explosive;
4) The bottom open end of the energy gathering cover in the primary explosive is arranged towards the outer direction of the hole, the primary explosive is put into the hole bottom of the tunnel tunneling energy gathering hydraulic smooth blasting peripheral hole, a water bag is arranged between any two adjacent primary explosive, and a plurality of primary explosive and a plurality of water bags are used for filling the blasting hole;
5) Filling stemming on the orifice of the blast hole to finish explosive filling;
slits with the width of 4mm are symmetrically arranged on two opposite side walls of the slit pipe; a limit structure boss is arranged in one end of the joint cutting pipe;
the energy gathering cover is conical; the diameter of the widest part of the energy gathering cover is smaller than the inner diameter of the slitting pipe and larger than the inner diameter of the boss;
the slit pipe is a PVC pipe; the energy gathering cover is made of metal aluminum material.
2. The method for charging tunnel boring energy-collecting hydraulic smooth blasting peripheral holes according to claim 1, wherein the boss is horizontally extended from the inner wall of the slit pipe to the central axis of the slit pipe; the width of the boss is 1mm.
3. The roadway entry energy-gathering hydraulic smooth blasting perimeter hole charging method of claim 1, wherein the energy gathering cover comprises: a convex ring and a tip; a tip is arranged at one end of the energy gathering cover; an opening is arranged at the other end of the energy gathering cover, and a convex ring is outwards arranged on the outer side wall of the opening.
4. The method for charging tunnel boring energy-collecting hydraulic smooth blasting peripheral holes according to claim 1, wherein the energy-collecting cover in the step 1) slides into the slit pipe from the top end of the slit pipe and is abutted with the boss at the bottom of the slit pipe.
5. A tunnel boring energy-collecting hydraulic smooth blasting peripheral hole charging method according to claim 3, wherein the tip of the energy collecting cover is arranged in the direction of the state charge in the slit pipe.
6. The roadway tunneling energy-gathering hydraulic smooth blasting peripheral hole charging method is characterized in that the two sides of the kerf pipe are symmetrically provided with kerf structures, the balance of the wall of the blast hole in the initial stage of explosion is changed, and the stress during explosion is concentrated in the blast holes around the kerf structures to form directional cracks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310929037.1A CN116793172A (en) | 2023-07-27 | 2023-07-27 | Roadway tunneling energy-gathering hydraulic smooth blasting peripheral hole charging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310929037.1A CN116793172A (en) | 2023-07-27 | 2023-07-27 | Roadway tunneling energy-gathering hydraulic smooth blasting peripheral hole charging method |
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| Publication Number | Publication Date |
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| CN116793172A true CN116793172A (en) | 2023-09-22 |
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|---|---|---|---|
| CN202310929037.1A Pending CN116793172A (en) | 2023-07-27 | 2023-07-27 | Roadway tunneling energy-gathering hydraulic smooth blasting peripheral hole charging method |
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| Country | Link |
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| CN (1) | CN116793172A (en) |
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- 2023-07-27 CN CN202310929037.1A patent/CN116793172A/en active Pending
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