CN202648554U - Rock mass engineering blasting excavation damping device - Google Patents
Rock mass engineering blasting excavation damping device Download PDFInfo
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- CN202648554U CN202648554U CN 201220230579 CN201220230579U CN202648554U CN 202648554 U CN202648554 U CN 202648554U CN 201220230579 CN201220230579 CN 201220230579 CN 201220230579 U CN201220230579 U CN 201220230579U CN 202648554 U CN202648554 U CN 202648554U
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Abstract
The utility model provides a rock mass engineering blasting excavation damping device which comprises a semi-circle tube body, fixing clips used for fixing explosive and a cylindric cannon plug matched with the semi-circle tube body. The radian of the semi-circle tube body is from 180 degrees to 270 degrees. The explosive fixing clips are arranged on the inner wall of the semi-circle tube body at equal intervals. The cannon plug is arranged at one end of the semi-circle tube body which adopts polyvinyl chloride (PVC) tubes or steel tubes. The cannon plug is yellow mud. The rock mass engineering blasting excavation damping device has the advantages that the technical scheme is adopted, after blasting, energy released through blasting of the explosive can be greatly obstructed and buffered by the patented technology of the rock mass engineering blasting excavation damping device, and accordingly impact on surrounding rock masses caused by the explosion is greatly reduced and a purpose of shock absorption is achieved. Semi-hole rate can reach above 96 %. On one hand, generation of a large number of crevices of a half periphery of a cannon hole can be avoided, and on the other hand, accumulated damages due to the blasting and vibration for many times to the surrounding rock masses can be avoided, and therefore stability of surrounding rocks after rock mass engineering is blasted and excavated is greatly increased, and economic benefits are huge.
Description
Technical field
The utility model belongs to
Blasting technique,Relate to a kind of
Rock mass engineering project Blasting Excavation damping device
Background technology
China various construction projects are such as water power, railway, highway and mine etc., constantly develop in depth, the most of Blasting Excavation that adopts of rock excavation engineering, thing followed surrounding rock stability problem also highlights day by day. and rock mass is as the complex geological conditions body, its mechanical characteristic is the coefficient result of many factors, such as forming process, geological environment and engineering-environment etc.
The vibrations that Blasting Excavation causes are very important influence factors to the stability of surrounding rock body.Rock mass many times is not whole one, there are many joints and crack in the middle of it, this is to be combined by various structural plane and structure, and common rock mass structure type can be divided into: block structure, mosaic texture, cataclastic texture, layer structure, stratiform cataclastic texture, prose style free from parallelism structure. the intensity of jointed rock mass, distortion and stability are affected by structural plane mainly.Rock mass for different types of structure, the character of its vibrations reaction also is different. the blocky structural rock mass good integrity, deformation behaviour under dynamic action is close to Homogeneous Elastic Solid, stability is better. and the mosaic texture rock mass may cause local avalanche and falling rocks under shock effect, but generally unstable failure can not occur. the cataclastic texture rock mass reacts stronger under shock effect, thereby might becoming flexible of chipping Structure Rock cause large-scale avalanche, falling rocks and small-scale slip. Bedded Rocks is subjected to roofing control, under shock effect, also a large amount of movements may occur.
Explosive explodes in rock mass, causes the surrounding medium disturbance, and outwards propagates with the form of ripple.What propagate at Near Blasting is shock wave, and middle district is stress wave, and the far field then is elastic wave, i.e. usually said attenuation of seismic waves, and in fact it be still a kind of weak stress wave.Therefore the burst stress ripple no longer produces the far field rock mass and directly destroys and continuous modification, but can cause far field rock mass preexisting crack expansion and local damage, thereby reduces the strength and stability that keeps rock.The far field mechanism of transmission of burst stress ripple and effect are that research explosion/broken rock is the scope that the master needn't relate to, but be the stability of the quick-fried rear reservation rock of research, study the problem that influence degree institute that soft, broken rock zone underground engineering is subjected to the Nearby Blasting operation must consider, so more and more paid attention to by engineering explosion, rock-soil mechanics and mining engineering circle.The mechanics effect of detonation stresses ripple centering, far field rock mass effect is studied, and mainly comes from the needs of shotfiring safety.Underground buildings or structures can be subjected to the effect of Nearby Blasting point source explosion stress wave, and boring pops excavates outside the need fragmented rock explosion and crushing, also can exert an influence to keeping rock mass, when this role and influence are larger, will produce damage effect.Explore weak stress wave to the failure mechanism of far field rock mass, more and more cause people's attention, become the another focus of theory of blasting research.The dynamic load that attenuation of seismic waves centering, far field rock mass are bestowed, be not enough to directly cause rock rupture although decayed to, but for the planes of weakness such as the joint more much lower than rock strength, bedding, crack, may cause that then these plane of weakness part pines split, crack propagation is extended, cause rock mass/internal injury, form the in-place blasting out district of certain limit, thereby greatly reduce bearing capacity and the stability of staying rock mass.Blast load can make the shear stress in the side slope rock increase, and makes the expansion of rock primary structural plane and structural plane; Blast action can make rock mass strength and deformation characteristic significantly reduce frequently, thereby affects the resistance to overturning of side slope.The quick-fried stress wave propagation of shaking that blast working produces can cause the damage of the close to buildings such as tunnel cave masonry, concrete dam body, causes that the building material mechanical performance is deteriorated, strength decreased.Rock can produce fatigue damage under the periodicity load action, the variation of its mechanical property has material impact to the long-time stability of rock mass engineering project.Former studies is many based on theoretical and qualitative exploration, and directly the quantitative study of guide field practice of construction is not enough, from
The rock mass engineering project explosionThe shock-effect that construction and excavation produces, the important external factor of adjoining rock stability more and more receives people's concern as an influence.Can explosion earthquake constitute a threat to the stable of country rock, often closely related with the degree of stability of surrounding rock body itself.Carry out blast working at unstable or soft rock mass (especially often running in colliery and tunnel), the effect of concussion of blasting just looms large, and is necessary to carry out the stable control of concussion of blasting and from more strictly controlled blasting shockproofness of construction technology aspect.
Summary of the invention
In order to address the above problem, it is simple, easy to use that the purpose of this utility model provides a kind of combination, can significantly stop and reduce the enormous impact that explosive charge produces rock mass, reach the purpose of damping, half porosity can reach more than 96%, not only can avoid rock to big gun hole half periphery to produce a large amount of cracks but also can avoid because concussion of blasting accumulated damage that surrounding rock body is produced repeatedly, thereby increase considerably the stability of country rock after the rock mass engineering project Blasting Excavation
Rock mass engineering project Blasting Excavation damping device
The technical solution of the utility model is:
A kind of rock mass engineering project Blasting Excavation damping device,Should
Rock mass engineering project Blasting Excavation damping deviceBy the semicircle body, be used for the fixed card of fixing explosive and form with the supporting cylindric wad of described semicircle body;
Wherein, the radian of described semicircle body is 180 °-270 °, and the explosive fixed card equidistantly arranges on the described semicircle inboard wall of tube body, and described wad arranges an end of described semicircle body.
Further, described semicircle body adopts pvc pipe or steel pipe.
Further, described wad is yellow mud.
Principle of the present utility model is:Behind the explosive charge of this device in imbedding rock, the crushing circle of formation (pulverizing circle) radius is 2 one 3 times of powder charge radius, and crack circle radius is 10 one 15 times of powder charge radius.During charging explosion, the explosion product pressure-acting is in the inwall of pipe, and pipe produces its outer wall of radial deformation displacement and contacts with the big gun hole wall.Pipe absorption portion explosion energy produces distortion and displacement, again pressure is passed to hole wall; On the other hand because the existence of pipe has stoped detonation gas to invade hole wall, again more effectively " protection " this part hole wall.During charging explosion, on other direction, detonation gas directly acts on hole wall, country rock is produced destroy.
According to the difference of lithology, hardness coefficient of rock f belongs to hard rock more than 8, and the impact of the mechanical strength of sleeve pipe material and elastic characteristic counter stress difference is very large, can adopt intensity and elasticity (lower material pipe, cost is low; Hardness coefficient of rock f belongs to middle hard rock below 8, or soft rock, and (high material pipe is such as steel pipe to adopt intensity and elasticity.The opening of pipe can be smaller, increases protection domain.
The beneficial effects of the utility model: adopt technique scheme, after the explosion, this practical patented technology can significantly stop and cushion the energy that explosive blasting discharges, thereby greatly reduce blast to the impact of surrounding rock body, reach the purpose of damping, half porosity can reach more than 96%, not only can avoid rock to big gun hole half periphery to produce a large amount of cracks but also can avoid because concussion of blasting accumulated damage that surrounding rock body is produced repeatedly, thereby significantly increase the stability of country rock after the rock mass engineering project Blasting Excavation, economic benefit is huge.
Description of drawings:
Fig. 1, Fig. 2 are structural representation of the present utility model.
Fig. 3 is the utility model implementation schematic diagram.
Among the figure:
The specific embodiment:
Below in conjunction with accompanying drawing the technical solution of the utility model is described further.
As Figure 1-3, the utility model
A kind of rock mass engineering project Blasting Excavation damping device,Should
Rock mass engineering project Blasting Excavation damping deviceBy semicircle body 3, be used for the fixed card 4 of fixing explosive and form with the supporting cylindric wad 5 of described semicircle body 3;
Wherein, the radian of described semicircle body 3 is 180 °-270 °, and explosive fixed card 4 equidistantly arranges on described semicircle body 3 inwalls, and described wad 5 arranges an end of described semicircle body 3.
Further, described semicircle body 3 adopts pvc pipe or steel pipe.
During use, at first, dig borehole 2 at rock mass 1, according to hardness coefficient of rock f, radian and the tubing of selected semicircle body 3 are that semicircle body 2/3 long explosive cartridge 6 is fixed in the semicircle body 3 by fixed card 4 with length, one end is put into borehole 2 with wad 5 sealings, after the ignition charge blast, the explosion product pressure-acting is in the inwall of pipe, and pipe produces its outer wall of radial deformation displacement and contacts with the big gun hole wall.Pipe absorption portion explosion energy produces distortion and displacement, again pressure is passed to hole wall; On the other hand because the existence of pipe has stoped detonation gas to invade hole wall, again more effectively " protection " this part hole wall.During charging explosion, on other direction, detonation gas directly acts on hole wall, country rock is produced destroy.
Above an embodiment of the present utility model is had been described in detail, but described content only is preferred embodiment of the present utility model, can not be considered to be used to limiting practical range of the present utility model.All equalizations of doing according to the utility model application range change and improve etc., all should still belong within the patent covering scope of the present utility model.
Claims (3)
1.
A kind of rock mass engineering project Blasting Excavation damping device is characterized in that, this rock mass engineering project Blasting Excavation damping device,By semicircle body (3), be used for the fixing fixed card of explosive (4) and form with the supporting cylindric wad (5) of described semicircle body (3);
Wherein, the radian of described semicircle body (3) is 180 °-270 °, and described fixed card (4) equidistantly arranges on described semicircle body (3) inwall, and described wad (5) arranges an end of described semicircle body (3).
2.
Rock mass engineering project Blasting Excavation damping device according to claim 1 is characterized in that,Described semicircle body (3) adopts pvc pipe or steel pipe to make.
3.
Rock mass engineering project Blasting Excavation damping device according to claim 1 is characterized in that,Described wad (5) is yellow mud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220230579 CN202648554U (en) | 2012-05-21 | 2012-05-21 | Rock mass engineering blasting excavation damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220230579 CN202648554U (en) | 2012-05-21 | 2012-05-21 | Rock mass engineering blasting excavation damping device |
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| Publication Number | Publication Date |
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| CN202648554U true CN202648554U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220230579 Expired - Fee Related CN202648554U (en) | 2012-05-21 | 2012-05-21 | Rock mass engineering blasting excavation damping device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202648554U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106871753A (en) * | 2017-01-04 | 2017-06-20 | 中铁隧道集团有限公司 | A kind of loading method for rock stratum tunnel shaping of improving the standard |
| CN108303311A (en) * | 2018-04-16 | 2018-07-20 | 昆明理工大学 | A kind of the blasthole suspension stabilising arrangement and blasthole forming method of Blasting Models scientific research and testing |
-
2012
- 2012-05-21 CN CN 201220230579 patent/CN202648554U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106871753A (en) * | 2017-01-04 | 2017-06-20 | 中铁隧道集团有限公司 | A kind of loading method for rock stratum tunnel shaping of improving the standard |
| CN108303311A (en) * | 2018-04-16 | 2018-07-20 | 昆明理工大学 | A kind of the blasthole suspension stabilising arrangement and blasthole forming method of Blasting Models scientific research and testing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Fujian Xinhua Engineering Co., Ltd. Assignor: Guangdong Hongda Blasting Co., Ltd. Contract record no.: 2016350000035 Denomination of utility model: Rock mass engineering blasting excavation damping device Granted publication date: 20130102 License type: Common License Record date: 20161008 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20170521 |