CN109827479B - Efficient static blasting auxiliary orientation device for grooving large drilling and construction method - Google Patents
Efficient static blasting auxiliary orientation device for grooving large drilling and construction method Download PDFInfo
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- CN109827479B CN109827479B CN201910281138.6A CN201910281138A CN109827479B CN 109827479 B CN109827479 B CN 109827479B CN 201910281138 A CN201910281138 A CN 201910281138A CN 109827479 B CN109827479 B CN 109827479B
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- 230000003068 static effect Effects 0.000 title claims abstract description 64
- 238000005422 blasting Methods 0.000 title claims abstract description 41
- 238000005553 drilling Methods 0.000 title claims abstract description 26
- 238000010276 construction Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 239000002002 slurry Substances 0.000 claims description 18
- 239000011435 rock Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 6
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 6
- 241001330002 Bambuseae Species 0.000 claims description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 6
- 239000011425 bamboo Substances 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract description 3
- 230000002146 bilateral effect Effects 0.000 abstract description 2
- 238000006703 hydration reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
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- 239000002360 explosive Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
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- 150000002484 inorganic compounds Chemical group 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000003405 preventing effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
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- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model provides a high-efficient static blasting auxiliary orientation device and construction method for grooving big drilling, including perpendicular setting and bilateral symmetry setting's left deflector and right deflector, left side deflector and right deflector are preceding dull and stereotyped, well arc and back dull and stereotyped in proper order from the front to back, the well arc of left side deflector and right deflector is left and right sides and is formed the cylinder chamber relatively, the front side contact of the preceding dull and stereotyped of left side deflector and right deflector forms preceding V die cavity, the back side contact of the back dull and stereotyped of left side deflector and right deflector forms back V die cavity, preceding V die cavity, cylinder chamber and back V die cavity link up, preceding V die cavity and back V die cavity are symmetrical about the central line of cylinder chamber front and back, the last port department of left side deflector and right deflector is provided with the stopper, be provided with preceding V die cavity, cylinder chamber and the inside water injector of back V die cavity internal water injection on the stopper. The invention has simple structure, convenient operation, plays a guiding role in the static blasting process, improves the efficiency of static blasting, and has good anti-spraying hole performance.
Description
Technical Field
The invention belongs to the technical field of static blasting, and particularly relates to a high-efficiency static blasting auxiliary orientation device for grooving and large drilling and a construction method.
Background
The static blasting mainly adopts a silent breaker (also called static breaker), and the main component of the breaker is inorganic compound which takes calcium oxide as a main body through high-temperature calcination, and a proper amount of additive is mixed for co-grinding to prepare the powdery material for non-explosive breaking with high expansion performance. Static blasting does not generate public hazards such as noise, vibration, dust and the like, can calm and safely crush and disintegrate rocks or concrete structures and the like, and has been widely used in the fields of demolishing urban buildings and structures, mining rare stone, blasting-free tunneling tunnels and the like.
The existing static blasting technology adopts small-aperture static blasting, the diameter of a drilled hole is between 30 and 50 mm, dangerous spray hole phenomena (the phenomenon that static breaker is suddenly sprayed out after being poured into the drilled hole) are extremely easy to occur once the diameter of the drilled hole is too large or the temperature is too high, the construction safety and the construction progress are affected, and the blasting direction is uncertain. Meanwhile, compared with the large-aperture static blasting, the small-aperture static blasting has the problems of small expansion pressure, low reaction speed, lower construction efficiency and the like. Meanwhile, the hydration reaction of the crusher is greatly affected by temperature, and the hydration is too slow below 0 ℃; the hydration reaction is fast at 40-50 ℃, but the spray holes are easy. The colloquial telephone theory is that: to be good at the task, it is necessary to use its device first. If drilling holes with large diameter (the diameter is larger than 50 mm) and blasting at the ambient temperature of 40-50 ℃ are adopted to improve the construction efficiency, the corresponding anti-spraying holes, the orientation device capable of controlling the ambient temperature and the corresponding construction method are needed to provide support.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides the high-efficiency static blasting auxiliary orientation device for grooving and large drilling and the construction method, which have the advantages of simple structure, convenient operation, orifice prevention and high static blasting efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme: a supplementary orienting device of high-efficient static blasting for grooving big drilling, left deflector and right deflector including setting up perpendicularly and bilateral symmetry sets up, left side deflector and right deflector are preceding dull and stereotyped from the front to back in proper order, well arc and back dull and stereotyped, the well arc of left side deflector and right deflector is controlled relatively and is formed the cylinder chamber, the front side contact of the preceding dull and stereotyped of left side deflector and right deflector forms preceding V die cavity, the back side contact of the back dull and stereotyped of left side deflector and right deflector forms back V die cavity, preceding V die cavity, cylinder chamber and back V die cavity link up, preceding V die cavity and back V die cavity are symmetrical around the central line of cylinder chamber, the last port department of left side deflector and right deflector is provided with the stopper, be provided with the water injector of preceding V die cavity, cylinder chamber and the inside water injection of back V die cavity on the stopper.
The plugging device is characterized in that the plugging device is formed by sequentially arranging a front V-shaped cylinder, a middle arc-shaped cylinder and a rear V-shaped cylinder which are communicated from front to back, wherein an upper cover plate is horizontally arranged at the upper ends of the front V-shaped cylinder, the middle arc-shaped cylinder and the rear V-shaped cylinder, the front V-shaped cylinder and the rear V-shaped cylinder are symmetrically arranged around the central line of the middle arc-shaped cylinder, V-shaped included angles of the cross sections of the front V-shaped cylinder and the rear V-shaped cylinder are gradually increased from bottom to top, the outer diameter of the cross section of the middle arc-shaped cylinder is gradually increased from bottom to top, the outer contours of the lower ends of the front V-shaped cylinder, the middle arc-shaped cylinder and the rear V-shaped cylinder are correspondingly contacted with the inner contours of upper ports of a front V-shaped cavity, a cylindrical cavity and a rear V-shaped cavity, and through guide pipes which are respectively corresponding to the front V-shaped cylinder, the middle arc-shaped cylinder and the rear V-shaped cylinder are arranged on the upper cover plate, and limiting blocking edges are respectively arranged at the left side and the right side of the middle of the upper cover plate.
The water injector is provided with three, and every water injector all includes an open container in top, and the container bottom is connected with the water injection pipe, and the water injection pipe corresponds to insert in the pipe of preceding V type section of thick bamboo, well arc section of thick bamboo and back V type section of thick bamboo department, and the water injection pipe lower extreme stretches into left deflector and the inside downside of right deflector.
The construction method of the high-efficiency static blasting auxiliary orientation device for grooving and large drilling comprises the following steps,
A. Drilling holes with depth larger than or equal to the heights of the left guide plate and the right guide plate at the preset static blasting position according to construction requirements, wherein the diameter of the holes is larger than 50 mm;
B. Cutting two V-shaped cutting grooves with the same size as the cross sections of the front V-shaped cavity and the rear V-shaped cavity along the direction of directional rock breaking on the front side and the rear side of a drilling hole by using a cutting groove device, wherein the depth of each V-shaped cutting groove is consistent with the depth of the drilling hole;
C. Placing the left guide plate and the right guide plate in the drilled holes and the V-shaped grooves, mixing the static breaker and water according to the proportion of 0.25-0.35, stirring into slurry, pouring the static breaker slurry into a front V-shaped cavity, a cylindrical cavity and a rear V-shaped cavity formed between the left guide plate and the right guide plate, and tamping the static breaker slurry by using a wood stick;
D. wedging the plugging device into the upper ports of the left guide plate and the right guide plate, correspondingly contacting the outer contours of the lower ends of the front V-shaped cylinder, the middle arc-shaped cylinder and the rear V-shaped cylinder with the inner contours of the upper ports of the front V-shaped cavity, the cylindrical cavity and the rear V-shaped cavity, and plugging the upper ports of the drilling holes and the V-shaped cutting grooves;
E. inserting a water injector into a guide pipe on an upper cover plate of the plugging device, inserting a water injection pipe into static breaker slurry, then injecting warm water at 50-60 ℃ into the water injector to accelerate reaction, and continuously knocking the plugging device downwards in the continuous reaction process of the warm water and the static breaker slurry to ensure that the outer side surfaces of a front V-shaped barrel, a middle arc-shaped barrel and a rear V-shaped barrel are in corresponding contact with the inner side walls of upper ports of a front V-shaped cavity, a cylindrical cavity and a rear V-shaped cavity all the time, so that higher tightness is ensured, and spray holes are prevented;
F. The static breaker slurry is chemically reacted with water to expand, and the front side and the rear side of the left guide plate and the right guide plate are expanded outwards, so that the static state of the rock, the building or the structure is slowly cracked, and after the static state of the rock, the building or the structure is blasted, the efficient static state blasting auxiliary orientation device is taken out to clean and is used for blasting of the next drilling hole.
By adopting the technical scheme, the invention has the following technical effects:
(1) The mechanical auxiliary orientation device is adopted, so that the single-hole crusher is large in quantity, high in crushing energy and large in expansion pressure on the hole wall; and the problems of orientation and spray holes in large-aperture static blasting are effectively solved, so that the static rock breaking technology can be used for the condition of large-aperture blasting above 50 mm.
(2) The pre-slotting around the drilling holes and the cutting edges of the guide plates fully exert the stress concentration effect, so that the guide plates can be ensured to be in close contact with the grooving drilling holes, and the drilling holes are directionally expanded along the directions of the front side edges and the rear side edges of the two guide plates; meanwhile, the V-shaped included angle of the cross sections of the front V-shaped barrel and the rear V-shaped barrel of the plugging device is gradually increased from bottom to top, the outer diameter of the cross section of the middle arc-shaped barrel is gradually increased from bottom to top, and the plugging device is frequently hammered in the static blasting process, so that the plugging device can always plug the upper ports of the two guide plates, energy overflow is reduced, and the blowout preventing effect is better.
(3) In large-aperture static blasting, a high-speed hydration reaction environment is provided for the static breaking agent by injecting warm boiled water at 40-60 ℃ into a plurality of reserved water injection holes and a container, the reaction time is short, the breaking waiting time is effectively reduced, and the directional static rock breaking efficiency is improved.
In conclusion, the static blasting device has the advantages of simple structure, convenience in operation, guiding function in the static blasting process, improvement of static blasting efficiency and good anti-spraying hole performance.
Drawings
FIG. 1 is a schematic view of the overall assembly of the present invention;
FIG. 2 is a top view of the left and right guide plates of FIG. 1;
FIG. 3 is a schematic view of the structure of the water injector in the middle of the upper cover plate;
FIG. 4 is a schematic view of the structure of the water injectors on the front and rear sides of the upper cover plate;
fig. 5 is a schematic perspective view of an occluder.
Detailed Description
As shown in fig. 1-5, the efficient static blasting auxiliary orientation device for grooving large holes comprises a left guide plate 1 and a right guide plate 2 which are vertically arranged and symmetrically arranged left and right, wherein the left guide plate 1 and the right guide plate 2 are a front flat plate 3, a middle arc plate 4 and a rear flat plate 5 in sequence from front to back, the middle arc plates 4 of the left guide plate 1 and the right guide plate 2 are left and right oppositely to form a cylindrical cavity 6, front side edges of the front flat plates 3 of the left guide plate 1 and the right guide plate 2 are contacted to form a front V-shaped cavity 7, rear side edges of the rear flat plates 5 of the left guide plate 1 and the right guide plate 2 are contacted to form a rear V-shaped cavity 8, the front V-shaped cavity 7, the cylindrical cavity 6 and the rear V-shaped cavity 8 are communicated, the front V-shaped cavity 7 and the rear V-shaped cavity 8 are symmetrical front and back, a plugging device 9 is arranged at an upper port of the left guide plate 1 and the right guide plate 2, and a water injector 10 for injecting water into the front V-shaped cavity 7, the cylindrical cavity 6 and the rear V-shaped cavity 8 are arranged on the plugging device 9.
The plugging device 9 is formed by sequentially arranging a front V-shaped barrel 11, a middle arc-shaped barrel 12 and a rear V-shaped barrel 13 which are communicated from front to back, wherein upper ends of the front V-shaped barrel 11, the middle arc-shaped barrel 12 and the rear V-shaped barrel 13 are horizontally provided with an upper cover plate 14, the front V-shaped barrel 11 and the rear V-shaped barrel 13 are symmetrically arranged around the central line of the middle arc-shaped barrel 12, V-shaped included angles of the cross sections of the front V-shaped barrel 11 and the rear V-shaped barrel 13 are gradually increased from bottom to top, the outer diameters of the cross sections of the middle arc-shaped barrel 12 are gradually increased from bottom to top, the lower end outer contours of the front V-shaped barrel 11, the middle arc-shaped barrel 12 and the rear V-shaped barrel 13 are correspondingly contacted with the inner contours of upper ports of the front V-shaped cavity 7, the cylindrical cavity 6 and the rear V-shaped cavity 8, upper cover plates 14 are respectively provided with through guide pipes which are respectively vertically corresponding to the front V-shaped barrel 11, the middle arc-shaped barrel 12 and the rear V-shaped barrel 13, the middle part of the upper cover plate 14 is respectively provided with limit blocking edges 15 on the left side and the right side of the middle arc-shaped barrel 12, and limiting edges 15 are respectively, and limiting edges 15 are used for limiting the plugging the upper edges 15 to prevent the limiting devices from falling into the upper ports of the left guide plate 1 and the guide plates 2.
The water injector 10 is provided with three water injectors 10, each water injector 10 comprises a container 16 with an open top, the bottom of the container 16 is connected with a water injection pipe 17, the water injection pipe 17 is correspondingly inserted into a guide pipe 18 at the front V-shaped barrel 11, the middle arc-shaped barrel 12 and the rear V-shaped barrel 13, and the lower end of the water injection pipe 17 extends into the lower sides of the interiors of the left guide plate 1 and the right guide plate 2.
The construction method of the high-efficiency static blasting auxiliary orientation device for grooving and large drilling comprises the following steps,
A. Drilling holes with depth larger than or equal to the heights of the left guide plate 1 and the right guide plate 2 at the preset static blasting position according to construction requirements, wherein the diameter of the holes is larger than 50 mm;
B. Cutting two V-shaped cutting grooves with the same size as the cross sections of the front V-shaped cavity 7 and the rear V-shaped cavity 8 along the direction of directional rock breaking on the front side and the rear side of a drilling hole by using a cutting groove device, wherein the depth of the V-shaped cutting grooves is consistent with the depth of the drilling hole;
C. Placing the left guide plate 1 and the right guide plate 2 in the drilled holes and the V-shaped grooves, mixing the static breaker and water according to the proportion of 0.25-0.35, stirring into slurry, pouring the static breaker slurry into a front V-shaped cavity 7, a cylindrical cavity 6 and a rear V-shaped cavity 8 formed between the left guide plate 1 and the right guide plate 2, and tamping the static breaker slurry by using a wood stick;
D. Wedging the plugging device 9 into the upper ports of the left guide plate 1 and the right guide plate 2, correspondingly contacting the outer contours of the lower ends of the front V-shaped barrel 11, the middle arc-shaped barrel 12 and the rear V-shaped barrel 13 with the inner contours of the upper ports of the front V-shaped cavity 7, the cylindrical cavity 6 and the rear V-shaped cavity 8, and plugging the upper ports of the drilling holes and the V-shaped cutting grooves;
E. Inserting the water injector 10 into the guide pipe 18 on the upper cover plate 14 of the plugging device 9, inserting the water injection pipe 17 into the static breaker slurry, then injecting warm water with the temperature of 50-60 ℃ into the water injector 10 to accelerate the reaction, and continuously knocking the plugging device 9 downwards in the continuous reaction process of the warm water and the static breaker slurry to ensure that the outer side surfaces of the front V-shaped barrel 11, the middle arc-shaped barrel 12 and the rear V-shaped barrel 13 are always in corresponding contact with the inner side walls of the upper ports of the front V-shaped cavity 7, the cylindrical cavity 6 and the rear V-shaped cavity 8, so that higher tightness is ensured, and spray holes are prevented;
F. The static breaker slurry is expanded by chemical reaction with water, and the front side and the rear side of the left guide plate 1 and the right guide plate 2 are expanded outwards, so that the static state of the rock, the building or the structure is slowly cracked, and after the static state of the rock, the building or the structure is blasted, the efficient static state blasting auxiliary orientation device is taken out, and the efficient static state blasting auxiliary orientation device is scrubbed and used for blasting of the next drilling hole.
The present embodiment is not limited in any way by the shape, material, structure, etc. of the present invention, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention are all included in the scope of protection of the technical solution of the present invention.
Claims (2)
1. A construction method for a high-efficiency static blasting auxiliary orientation device for grooving and large drilling is characterized in that: the high-efficiency static blasting auxiliary orientation device for grooving large holes comprises a left guide plate and a right guide plate which are vertically arranged and symmetrically arranged left and right, wherein the left guide plate and the right guide plate are a front flat plate, a middle arc plate and a rear flat plate in sequence from front to back, the middle arc plates of the left guide plate and the right guide plate are opposite left and right to form a cylindrical cavity, the front side edges of the front flat plates of the left guide plate and the right guide plate are contacted to form a front V-shaped cavity, the rear side edges of the rear flat plates of the left guide plate and the right guide plate are contacted to form a rear V-shaped cavity, the front V-shaped cavity, the cylindrical cavity and the rear V-shaped cavity are communicated, the front V-shaped cavity and the rear V-shaped cavity are in front-rear symmetry about the central line of the cylindrical cavity, a plugging device is arranged at the upper ports of the left guide plate and the right guide plate, and a water injector for injecting water into the front V-shaped cavity, the cylindrical cavity and the rear V-shaped cavity is arranged on the plugging device;
The plugging device comprises a front V-shaped barrel, a middle arc-shaped barrel and a rear V-shaped barrel which are communicated from front to back in sequence, wherein upper cover plates are horizontally arranged at the upper ends of the front V-shaped barrel, the middle arc-shaped barrel and the rear V-shaped barrel, the front V-shaped barrel and the rear V-shaped barrel are symmetrically arranged around the central line of the middle arc-shaped barrel, V-shaped included angles of the cross sections of the front V-shaped barrel and the rear V-shaped barrel are gradually increased from bottom to top, the outer diameters of the cross sections of the middle arc-shaped barrels are gradually increased from bottom to top, the outer contours of the lower ends of the front V-shaped barrel, the middle arc-shaped barrel and the rear V-shaped barrel are correspondingly contacted with the inner contours of upper ports of a front V-shaped cavity, a cylindrical cavity and a rear V-shaped cavity, and through guide pipes which are respectively corresponding to the front V-shaped barrel, the middle arc-shaped barrel and the rear V-shaped barrel are arranged on the upper cover plates, and limit blocking edges are respectively arranged at the left side and the right side of the middle part of the upper cover plates;
the construction method comprises the following steps:
A. Drilling holes with depth larger than or equal to the heights of the left guide plate and the right guide plate at the preset static blasting position according to construction requirements, wherein the diameter of the holes is larger than 50 mm;
B. Cutting two V-shaped cutting grooves with the same size as the cross sections of the front V-shaped cavity and the rear V-shaped cavity along the direction of directional rock breaking on the front side and the rear side of a drilling hole by using a cutting groove device, wherein the depth of each V-shaped cutting groove is consistent with the depth of the drilling hole;
C. Placing the left guide plate and the right guide plate in the drilled holes and the V-shaped grooves, mixing the static breaker and water according to the proportion of 0.25-0.35, stirring into slurry, pouring the static breaker slurry into a front V-shaped cavity, a cylindrical cavity and a rear V-shaped cavity formed between the left guide plate and the right guide plate, and tamping the static breaker slurry by using a wood stick;
D. wedging the plugging device into the upper ports of the left guide plate and the right guide plate, correspondingly contacting the outer contours of the lower ends of the front V-shaped cylinder, the middle arc-shaped cylinder and the rear V-shaped cylinder with the inner contours of the upper ports of the front V-shaped cavity, the cylindrical cavity and the rear V-shaped cavity, and plugging the upper ports of the drilling holes and the V-shaped cutting grooves;
E. Inserting a water injector into a guide pipe on an upper cover plate of the plugging device, inserting a water injection pipe into static breaker slurry, then injecting warm water at 40-50 ℃ into the water injector to accelerate reaction, and continuously knocking the plugging device downwards in the continuous reaction process of the warm water and the static breaker slurry to ensure that the outer side surfaces of a front V-shaped barrel, a middle arc-shaped barrel and a rear V-shaped barrel are in corresponding contact with the inner side walls of upper ports of a front V-shaped cavity, a cylindrical cavity and a rear V-shaped cavity all the time, so that higher tightness is ensured, and spray holes are prevented;
F. The static breaker slurry is chemically reacted with water to expand, and the front side and the rear side of the left guide plate and the right guide plate are expanded outwards, so that the static state of the rock, the building or the structure is slowly cracked, and after the static state of the rock, the building or the structure is blasted, the efficient static state blasting auxiliary orientation device is taken out to clean and is used for blasting of the next drilling hole.
2. The construction method of the efficient static blasting auxiliary orientation device for grooving large drilling according to claim 1, wherein the construction method comprises the following steps: the water injector is provided with three, and every water injector all includes an open container in top, and the container bottom is connected with the water injection pipe, and the water injection pipe corresponds to insert in the pipe of preceding V type section of thick bamboo, well arc section of thick bamboo and back V type section of thick bamboo department, and the water injection pipe lower extreme stretches into left deflector and the inside downside of right deflector.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115064A (en) * | 2018-10-22 | 2019-01-01 | 吕梁学院 | Large aperture high efficiency static explosion auxiliary directional device and its static blasting construction method |
| CN109443120A (en) * | 2018-11-23 | 2019-03-08 | 吕梁学院 | LARGE APERTURE STATIC IMAGING explosion blowout prevention aperture apparatus and its application method |
| CN209745138U (en) * | 2019-04-09 | 2019-12-06 | 吕梁学院 | efficient static blasting auxiliary orienting device for grooving large drill hole |
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| WO2006103934A1 (en) * | 2005-03-28 | 2006-10-05 | Sumitomo Osaka Cement Co., Ltd. | Static crushing method, aid for static crushing used for the crushing method, and filling tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115064A (en) * | 2018-10-22 | 2019-01-01 | 吕梁学院 | Large aperture high efficiency static explosion auxiliary directional device and its static blasting construction method |
| CN109443120A (en) * | 2018-11-23 | 2019-03-08 | 吕梁学院 | LARGE APERTURE STATIC IMAGING explosion blowout prevention aperture apparatus and its application method |
| CN209745138U (en) * | 2019-04-09 | 2019-12-06 | 吕梁学院 | efficient static blasting auxiliary orienting device for grooving large drill hole |
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