CN105486181A - Vertical shaft deep-hole sectional blasting method - Google Patents
Vertical shaft deep-hole sectional blasting method Download PDFInfo
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- CN105486181A CN105486181A CN201510802242.7A CN201510802242A CN105486181A CN 105486181 A CN105486181 A CN 105486181A CN 201510802242 A CN201510802242 A CN 201510802242A CN 105486181 A CN105486181 A CN 105486181A
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- circle
- eye
- reliever
- detonator
- snubber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
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Abstract
The invention provides a vertical shaft deep-hole sectional blasting method. The method carries out 5m deep-hole controlled blasting by combining a peripheral hole and outer-circle shallow hole combination shaft wall quality control technology, a spaced double-pipe forward and reverse charging technology and a two-stage straight hole sectional slotting technology. The blast hole utilizing rate of vertical shaft 5m deep-hole controlled blasting is higher than 90%. The blasting effect is improved, the engineering cost is reduced, and the construction cycle is shortened.
Description
Technical field
The present invention relates to vertical shaft blasting technique field, more specifically, relate to a kind of vertical shaft deep-hole step blasting method.
Background technology
Current most domestic vertical shaft adopts short section to dig the construction method of building mixture operation and constructs, as shown in Figure 1, when adopting this construction method, for ensureing the rock drilling space that umbrella bores, stayed between the supporting borehole wall 1 and rock drilling working face 3 at pit shaft and established one section of exposed borehole wall 2, the height section of being of this section of exposed borehole wall 2 is high.Because explosion drilling depth has uncertainty, cause supporting drilling depth and explosion drilling depth cannot keep completely the same, therefore, section is high also can constantly be changed.Because 5m Deep-hole Controlled Blasting borehole is excessively dark, and get out restriction a little (go out to bore point and ensure certain distance with the exposed borehole wall 2) by umbrella, if the high size of the section of consideration, all by same angle rock drilling, can not cause the exposed borehole wall 2 top seriously to owe to dig or seriously backbreak in bottom when drilling work face periphery hole.If the exposed borehole wall 2 is owed to dig, need benefit to dig, thus affect construction speed, if the exposed borehole wall 2 is backbreak, then need, by being partially filled of backbreaking, to cause raw-material waste.
In addition, above-mentioned construction method generally adopts the borehole of below the 4.5m degree of depth to carry out explosion, and single digging footage is generally less than 4m, and blast hole utilization factor is low.
Summary of the invention
In view of the above problems, the object of this invention is to provide a kind of vertical shaft deep-hole step blasting method, to solve the problem proposed in above-mentioned background technology.
The invention provides a kind of vertical shaft deep-hole step blasting method, comprise borehole construction stage, blashole charge stage and the stage of detonating; Wherein,
The borehole construction stage, comprising:
With the center of rock drilling working face for the center of circle, circumferentially carry out the slotting of borehole successively at nine that are formed from inside to outside based on the center of circle, and first lap and the second circle are for snubber, the eye of snubber dark for 5.2m ~ 5.4m, eye inclination angle be 90 ° ± 1 °; 3rd circle is reliever to the 7th circle, and the eye of reliever is dark is 5m ~ 5.1m, eye inclination angle is 90 ° ± 1 °; 8th circle is periphery hole, and the 9th circle is the shallow eye in outer ring; And the exposed distance section of being between rock drilling working face and the supporting borehole wall is high; Wherein,
When Duan Gaowei 2 ~ 2.5m, the circle footpath of periphery hole is 10000 ~ 13000mm, and eye is dark is 5m ~ 5.1m, and eye inclination angle is 100 ° ± 1 °, and periphery hole is evenly arranged in the 8th circle circumferentially; The circle footpath of the shallow eye in outer ring is 10000 ~ 13000mm, and eye is dark is 1.7m ± 0.1m, and eye inclination angle is 105 ° ± 1 °, and the shallow eye in outer ring is evenly arranged in the 9th circle circumferentially;
When Duan Gaowei 2.5 ~ 3m, the circle footpath of periphery hole is 10000 ~ 13000mm, and eye is dark is 5m ~ 5.1m, and eye inclination angle is 99 ° ± 1 °, and periphery hole is evenly arranged in the 8th circle circumferentially; The circle footpath of the shallow eye in outer ring is 10000 ~ 13000mm, and eye is dark is 1.9m ± 0.1m, and eye inclination angle is 103 ° ± 1 °, and the shallow eye in outer ring is evenly arranged in the 9th circle circumferentially;
When Duan Gaowei 3 ~ 3.5m, the circle footpath of periphery hole is 10000 ~ 13000mm, and eye is dark is 5m ~ 5.1m, and eye inclination angle is 98 ° ± 1 °, and periphery hole is evenly arranged in the 8th circle circumferentially; The circle footpath of the shallow eye in outer ring is 10000 ~ 13000mm, and eye is dark is 2m ± 0.1m, and eye inclination angle is 101 ° ± 1 °, and the shallow eye in outer ring is evenly arranged in the 9th circle circumferentially;
When Duan Gaowei 3.5 ~ 4m, the circle footpath of periphery hole is 10000 ~ 13000mm, and eye is dark is 5m ~ 5.1m, and eye inclination angle is 97 ° ± 1 °, and periphery hole is evenly arranged in the 8th circle circumferentially; The circle footpath of the shallow eye in outer ring is 10000 ~ 13000mm, and eye is dark is 2.2m ± 0.1m, and eye inclination angle is 99 ° ± 1 °, and the shallow eye in outer ring is evenly arranged in the 9th circle circumferentially;
When Duan Gaowei 4 ~ 5m, only carry out the slotting of periphery hole, the circle footpath of periphery hole is 10000 ~ 13000mm, and eye is dark is 5m ~ 5.1m, and eye inclination angle is 97 ° ± 1 °, and periphery hole is evenly arranged in the 8th circle circumferentially;
When Duan Gaowei 5 ~ 6m, only carry out the slotting of periphery hole, the circle footpath of periphery hole is 10000 ~ 13000mm, and eye is dark is 5m ~ 5.1m, and eye inclination angle is 97 ° ± 1 °, and periphery hole is evenly arranged in the 8th circle circumferentially;
In the blashole charge stage, comprising:
The snubber of first lap and the second circle is the forward and reverse powder charge of double detonator, and powder charge is divided into two sections in each detonator, every section of loaded length is 2m ~ 2.5m, middle gap stemming, the top of the snubber of first lap fills the 1st section of detonator, the bottom of the snubber of first lap fills the 2nd section of detonator. and the top of the snubber of the second circle fills the 3rd section of detonator, and the bottom of the snubber of the second circle fills the 4th section of detonator;
Often enclose two adjacent relievers, one of them is the powder charge of double detonator positive direction, and another is single detonator inverse initiation, and in detonator, loaded length is 3.5m ~ 4m; And the reliever of the 3rd circle fills the 5th section of detonator; The reliever of the 4th circle fills the 6th section of detonator; The reliever of the 5th circle fills the 7th section of detonator; The reliever of the 6th circle fills the 8th section of detonator, and the reliever of the 7th circle fills the 8th section of detonator;
The shallow eye of periphery hole and outer ring all adopts the forward and reverse powder charge of double detonator, and the shallow eye of periphery hole and outer ring all fills the 9th section of detonator;
Detonate the stage, comprising:
Be connected with each section of detonator one end of primacord, the other end is connected with initiator, and operation initiator is finished the work the explosion in face.
Utilize above-mentioned according to vertical shaft deep-hole step blasting method of the present invention, the quality of the borehole wall is controlled by the shallow eye in complement outer ring on periphery hole basis and according to the method for section height adjustment parameter, in addition, the present invention adopts 5m longhole to carry out explosion, make blast hole utilization factor reach more than 90%, the generation of blind big gun, residual big gun accident can be stopped.
In order to realize above-mentioned and relevant object, will describe in detail and the feature particularly pointed out in the claims after one or more aspect of the present invention comprises.Explanation below and accompanying drawing describe some illustrative aspects of the present invention in detail.But what these aspects indicated is only some modes that can use in the various modes of principle of the present invention.In addition, the present invention is intended to comprise all these aspects and their equivalent.
Accompanying drawing explanation
By reference to the content below in conjunction with the description of the drawings and claims, and understand more comprehensively along with to of the present invention, other object of the present invention and result will more be understood and should be readily appreciated that.In the accompanying drawings:
Fig. 1 is the rock drilling schematic diagram of prior art;
Fig. 2 is the longitudinal sectional drawing of the rock drilling working face borehole according to the embodiment of the present invention;
Fig. 3 is the location diagram of the shallow eye of periphery hole and outer ring according to the embodiment of the present invention;
Fig. 4 is the powder charge schematic diagram of the rock drilling working face borehole according to the embodiment of the present invention.
Reference numeral wherein comprises: the supporting borehole wall 1, the exposed borehole wall 2, rock drilling working face 3, periphery hole 4, the shallow eye 5 in outer ring.
Label identical in all of the figs indicates similar or corresponding feature or function.
Detailed description of the invention
Below with reference to accompanying drawing, specific embodiments of the invention are described in detail.
Explanation of nouns:
Eye inclination angle: umbrella bores the angle of working arm and rock drilling working face.
Burn cut: snubber, all perpendicular to driving face, to each other apart from less, and has the cutting method of the empty eye of not powder charge.
Snubber: the borehole referring to the various types formed in slotting process, can be collapse lower working face rock, arrange that other boreholes create good conditions.
Reliever: the borehole of Drilling between snubber and periphery hole.
Periphery hole: be arranged in the borehole of roadway surrounding near crag.
The shallow eye in outer ring: refer to that secondary peripheral eye is for controlling the borehole of borehole wall quality.
Circle footpath is the diameter of a circle that borehole surrounds.
Vertical shaft deep-hole step blasting method provided by the invention, comprises borehole construction stage, blashole charge stage and the stage of detonating.Respectively borehole construction stage, blashole charge stage and the stage of detonating are described in detail below.
One, the borehole construction stage
In order to solve the low problem of blast hole utilization factor, the present invention adopts the borehole depth of more than 5m to carry out explosion, and snubber is arranged as the straight eye of second order.Particularly, as shown in Figure 2 (in figure, the unit of numeral is mm), with the center of rock drilling working face for the center of circle, at nine that are formed from inside to outside based on the center of circle circumferentially, carry out the slotting of borehole successively, and first lap and the second circle are snubber, the eye of snubber is dark is 5.2m ~ 5.4m, eye inclination angle is 90 ° ± 1 °; 3rd circle is reliever to the 7th circle, and the eye of reliever is dark is 5m ~ 5.1m, eye inclination angle is 90 ° ± 1 °; 8th circle is periphery hole, and the 9th circle is the shallow eye in outer ring; Wherein,
1, first lap snubber
The circle footpath of the snubber of first lap is 1600 ~ 1900mm, and eye is dark is preferably 5.2m, and the snubber of first lap is evenly arranged in first lap circumferentially.
For the snubber of first lap, invention shows three examples:
Example one:
The circle footpath of the snubber of first lap is 1600mm, and eye spacing is 390mm, and the quantity of the snubber of first lap is 13.
Example two:
The circle footpath of the snubber of first lap is 1800mm, and eye spacing is 404mm, and the quantity of the snubber of first lap is 14.
Example three:
The circle footpath of the snubber of first lap is 1900mm, and eye spacing is 420mm, and the quantity of the snubber of first lap is 15.
2, the second circle snubber
The circle footpath of the snubber of the second circle is 2200 ~ 2500mm, and eye is dark is preferably 5.2m, and the snubber of the second circle is evenly arranged in the second circle circumferentially.
Three instantiations of the snubber of the second circle are:
Example one:
The circle footpath of the snubber of the second circle is 2200mm, and eye spacing is 476mm, and the quantity of the snubber of the second circle is 14.
Example two:
The circle footpath of the snubber of the second circle is 2400mm, and eye spacing is 503mm, and the quantity of the snubber of the second circle is 15.
Example three:
The circle footpath of the snubber of the second circle is 2600mm, and eye spacing is 523mm, and the quantity of the snubber of the second circle is 16.
3, the 3rd circle reliever
The circle footpath of the reliever of the 3rd circle is 3500 ~ 4000mm, and eye is dark is preferably 5m, and the reliever of the 3rd circle is evenly arranged in the 3rd circle circumferentially.
In invention, three instantiations of the reliever of the 3rd circle are:
Example one:
The circle footpath of the reliever of the 3rd circle is 3500mm, and eye spacing is 600mm, and the quantity of the reliever of the 3rd circle is 18.
Example two:
The circle footpath of the reliever of the 3rd circle is 3780mm, and eye spacing is 625mm, and the quantity of the reliever of the 3rd circle is 19.
Example three:
The circle footpath of the reliever of the 3rd circle is 4000mm, and eye spacing is 650mm, and the quantity of the reliever of the 3rd circle is 20.
4, the 4th circle reliever
The circle footpath of the reliever of the 4th circle is 5000 ~ 5500mm, and eye is dark is preferably 5m, and the reliever of the 4th circle is evenly arranged in the 4th circle circumferentially.
At illustrated three examples be:
The circle footpath of the reliever of the 4th circle is 5000mm, and eye spacing is 635mm, and the quantity of the reliever of the 4th circle is 22.
The circle footpath of the reliever of the 4th circle is 5160mm, and eye spacing is 703mm, and the quantity of the reliever of the 4th circle is 23.
The circle footpath of the reliever of the 4th circle is 5500mm, and eye spacing is 703mm, and the quantity of the reliever of the 4th circle is 24.
5, the 5th circle reliever
The circle footpath of the reliever of the 5th circle is 6500 ~ 7000mm, and eye is dark is preferably 5m, and the reliever of the 5th circle is evenly arranged in the 5th circle circumferentially.
Three examples shown in the present invention are:
Example one:
The circle footpath of the reliever of the 5th circle is 6500mm, and eye spacing is 600mm, and the quantity of the reliever of the 5th circle is 28.
Example two:
The circle footpath of the reliever of the 5th circle is 6640mm, and eye spacing is 694mm, and the quantity of the reliever of the 5th circle is 30.
Example three:
The circle footpath of the reliever of the 5th circle is 7000mm, and eye spacing is 738mm, and the quantity of the reliever of the 5th circle is 31.
6, the 6th circle reliever
The circle footpath of the reliever of the 6th circle is 8000 ~ 8500mm, and eye is dark is preferably 5m, and the reliever of the 6th circle is evenly arranged in the 6th circle circumferentially.
Three illustrated examples are:
Example one:
The circle footpath of the reliever of the 6th circle is 8000mm, and eye spacing is 664mm, and the quantity of the reliever of the 6th circle is 35.
Example two:
The circle footpath of the reliever of the 6th circle is 8120mm, and eye spacing is 708mm, and the quantity of the reliever of the 6th circle is 36.
Example three:
The circle footpath of the reliever of the 6th circle is 8500mm, and eye spacing is 775mm, and the quantity of the reliever of the 6th circle is 37.
7, the 7th circle reliever
The circle footpath of the reliever of the 7th circle is 9500 ~ 9900mm, and eye is dark is preferably 5m, and the reliever of the 7th circle is evenly arranged in the 7th circle circumferentially.
At three examples showing the 7th circle reliever of the present invention, be respectively:
Example one:
The circle footpath of the reliever of the 7th circle is 9500mm, and eye spacing is 680mm, and the quantity of the reliever of the 7th circle is 42.
Example two:
The circle footpath of the reliever of the 7th circle is 9600mm, and eye spacing is 700mm, and the quantity of the reliever of the 7th circle is 43.
Example three:
The circle footpath of the reliever of the 7th circle is 9900mm, and eye spacing is 800mm, and the quantity of the reliever of the 7th circle is 44.
8, the 8th circle periphery hole and the 9th shallow eye in circle outer ring
Seriously owe to prevent borehole wall top to dig or seriously backbreak in bottom, the present invention adopts the shallow eye in complement outer ring on the basis of periphery hole, and the height that reference field is high, the height change correspondence adjustment periphery hole high according to section and the parameter of the shallow eye in outer ring, avoid occurring the problems referred to above, to ensure the quality of the borehole wall.
As shown in Figure 3, the design parameter of the shallow eye of periphery hole and outer ring when different situations is as shown in the table for the position relationship of the shallow eye of periphery hole and outer ring:
Wherein, when Duan Gaowei 2 ~ 2.5m, the circle footpath of periphery hole is 10000 ~ 13000mm, is preferably 10260mm, and eye is dark is preferably 5m, and eye inclination angle is 100 ° ± 1 °, and periphery hole is evenly arranged in the 8th circle circumferentially; The circle footpath of the shallow eye in outer ring is 10000 ~ 13000mm, and be preferably 10500mm, eye is dark is 1.7m, and eye inclination angle is 105 ° ± 1 °, and the shallow eye in outer ring is evenly arranged in the 9th circle circumferentially.
When Duan Gaowei 2.5 ~ 3m, the circle footpath of periphery hole is 10000 ~ 13000mm, is preferably 10360mm, and eye is dark is preferably 5m, and eye inclination angle is 99 ° ± 1 °, and periphery hole is evenly arranged in the 8th circle circumferentially; The circle footpath of the shallow eye in outer ring is 10000 ~ 13000mm, and be preferably 10660mm, eye is dark is 1.9m, and eye inclination angle is 103 ° ± 1 °, and the shallow eye in outer ring is evenly arranged in the 9th circle circumferentially.
When Duan Gaowei 3 ~ 3.5m, the circle footpath of periphery hole is 10000 ~ 13000mm, is preferably 10494mm, and eye is dark is preferably 5m, and eye inclination angle is 98 ° ± 1 °, and periphery hole is evenly arranged in the 8th circle circumferentially; The circle footpath of the shallow eye in outer ring is 10000 ~ 13000mm, and be preferably 10800mm, eye is dark is 2m, and eye inclination angle is 101 ° ± 1 °, and the shallow eye in outer ring is evenly arranged in the 9th circle circumferentially.
When Duan Gaowei 3.5 ~ 4m, the circle footpath of periphery hole is 10000 ~ 13000mm, is preferably 10620mm, and eye is dark is preferably 5m, and eye inclination angle is 97 ° ± 1 °, and periphery hole is evenly arranged in the 8th circle circumferentially; The circle footpath of the shallow eye in outer ring is 10000 ~ 13000mm, is preferably 10860mm, and eye is dark is preferably 2.2m, and eye inclination angle is 99 ° ± 1 °, and the shallow eye in outer ring is evenly arranged in the 9th circle circumferentially.
When Duan Gaowei 4 ~ 5m, now, the shallow eye in complement outer ring is not needed, only carry out the slotting of periphery hole, the circle footpath of periphery hole is 10000 ~ 13000mm, is preferably 10900mm, eye is dark is preferably 5m, and eye inclination angle is 97 ° ± 1 °, and periphery hole is evenly arranged in the 8th circle circumferentially.
When Duan Gaowei 5 ~ 6m, do not need the shallow eye in complement outer ring yet, only carry out the slotting of periphery hole, the circle footpath of periphery hole is 10000 ~ 13000mm, is preferably 10960mm, and eye is dark is preferably 5m, eye inclination angle is 97 ° ± 1 °, and periphery hole is evenly arranged in the 8th circle circumferentially.
In a specific embodiment of the present invention, the eye spacing between two periphery holes is 640mm ± 100mm, but is not limited thereto spacing.
In another detailed description of the invention of the present invention, the diameter of the shallow eye in snubber, reliever, periphery hole and outer ring is 45mm ± 10mm, also can make suitable adjustment according to actual conditions.
Two, the blashole charge stage
Before the shallow eye powder charge in snubber, reliever, periphery hole and outer ring, first put into the shallow intraocular in snubber, reliever, periphery hole and outer ring respectively by connecting the airduct of high-pressure blast, by water remaining to snubber, reliever, the shallow intraocular of periphery hole and institute outer ring and rock dust punching to outside eye.
When first lap snubber and the second circle snubber powder charge, the snubber of first lap and the second circle is the forward and reverse powder charge of double detonator, and powder charge is divided into two sections in each detonator, every section of loaded length is 2m ~ 2.5m, the degree of depth due to borehole be 5.2m therefore, the centre of two sections has gap, the stemming blocking of this gap 500mm, the top of the snubber of first lap fills the 1st section of detonator, the bottom of the snubber of first lap fills the 2nd section of detonator. and the top of the snubber of the second circle fills the 3rd section of detonator, and the bottom of the snubber of the second circle fills the 4th section of detonator;
When reliever powder charge, the reliever often enclosed be interval double tube positive and negative to powder charge, namely often enclose two adjacent relievers, one of them is the powder charge of double detonator positive direction, and another is single detonator inverse initiation, and in detonator, loaded length is 3.5m ~ 4m; And the reliever of the 3rd circle fills the 5th section of detonator; The reliever of the 4th circle fills the 6th section of detonator; The reliever of the 5th circle fills the 7th section of detonator; The reliever of the 6th circle fills the 8th section of detonator, and the reliever of the 7th circle fills the 8th section of detonator;
When periphery hole and the shallow eye powder charge in outer ring, the shallow eye of periphery hole and outer ring all adopts the forward and reverse powder charge of double detonator, and the shallow eye of periphery hole and outer ring all fills the 9th section of detonator; And the coefficient of charge of the shallow eye of periphery hole and outer ring is 50%.
Fig. 4 shows the powder charge situation of the rock drilling working face borehole according to the embodiment of the present invention, and Fig. 4 hollow core borehole is the forward and reverse powder charge of double detonator or two-tube forward powder charge, and solid borehole is single detonator inverse initiation.
In a specific embodiment of the present invention, the interval time of the detonator of adjacent section is 250ms ± 20ms, that is, the 2nd section of detonator postpones 250ms ± 20ms than the 1st section of detonator; 3rd section of detonator postpones 250ms ± 20ms than the 2nd section of detonator; 4th section of detonator postpones 250ms ± 20ms than the 3rd section of detonator; 5th section of detonator postpones 250ms ± 20ms than the 4th section of detonator; 6th section of detonator postpones 250ms ± 20ms than the 5th section of detonator; 7th section of detonator postpones 250ms ± 20ms than the 6th section of detonator; 8th section of detonator postpones 250ms ± 20ms than the 7th section of detonator; 9th section of detonator postpones 250ms ± 20ms than the 8th section of detonator.
Three, detonate the stage
Be connected with each section of detonator one end of primacord, the other end is connected with initiator, and wherein, initiator is arranged on well head, goes out after well until staff, and operation initiator is finished the work the explosion in face.
When explosion, the 1st section of detonator explosion is at first the 2nd section of detonator blasting afterwards, by that analogy, until the 9th section of detonator blasting, completes whole explosions of rock drilling working face.
Foregoing describes vertical shaft deep-hole step blasting method provided by the invention in detail, by taking periphery hole to the controlled blasting of 5m longhole in conjunction with outer ring shallow eye borehole wall Quality Control Technology, interval double tube positive and negative to the combination of Charge and secondary straight eye segmented slotting technology, the blast hole utilization factor of vertical shaft 5m longhole controlled blasting is made to reach more than 90%, greatly improve demolition effect, reduce engineering cost, save the construction period, advance the development of vertical shaft mechanized construction technique.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (8)
1. a vertical shaft deep-hole step blasting method, comprises borehole construction stage, blashole charge stage and the stage of detonating; Wherein,
The described borehole construction stage, comprising:
With the center of rock drilling working face for the center of circle, circumferentially carry out the slotting of borehole successively at nine that are formed from inside to outside based on the described center of circle, and first lap and the second circle are for snubber, the eye of described snubber dark for 5.2m ~ 5.4m, eye inclination angle be 90 ° ± 1 °; 3rd circle is reliever to the 7th circle, and the eye of described reliever is dark is 5m ~ 5.1m, eye inclination angle is 90 ° ± 1 °; 8th circle is periphery hole, and the 9th circle is the shallow eye in outer ring; And the exposed distance section of being between described rock drilling working face and the supporting borehole wall is high; Wherein,
When being 2 ~ 2.5m for described section high, the circle footpath of described periphery hole is 10000 ~ 13000mm, and eye is dark is 5m ~ 5.1m, and eye inclination angle is 100 ° ± 1 °, and described periphery hole is evenly arranged in the 8th circle circumferentially; The circle footpath of the shallow eye in described outer ring is 10000 ~ 13000mm, and eye is dark is 1.7m ± 0.1m, and eye inclination angle is 105 ° ± 1 °, and the shallow eye in described outer ring is evenly arranged in the 9th circle circumferentially;
When being 2.5 ~ 3m for described section high, the circle footpath of described periphery hole is 10000 ~ 13000mm, and eye is dark is 5m ~ 5.1m, and eye inclination angle is 99 ° ± 1 °, and described periphery hole is evenly arranged in the 8th circle circumferentially; The circle footpath of the shallow eye in described outer ring is 10000 ~ 13000mm, and eye is dark is 1.9m ± 0.1m, and eye inclination angle is 103 ° ± 1 °, and the shallow eye in described outer ring is evenly arranged in the 9th circle circumferentially;
When being 3 ~ 3.5m for described section high, the circle footpath of described periphery hole is 10000 ~ 13000mm, and eye is dark is 5m ~ 5.1m, and eye inclination angle is 98 ° ± 1 °, and described periphery hole is evenly arranged in the 8th circle circumferentially; The circle footpath of the shallow eye in described outer ring is 10000 ~ 13000mm, and eye is dark is 2m ± 0.1m, and eye inclination angle is 101 ° ± 1 °, and the shallow eye in described outer ring is evenly arranged in the 9th circle circumferentially;
When being 3.5 ~ 4m for described section high, the circle footpath of described periphery hole is 10000 ~ 13000mm, and eye is dark is 5m ~ 5.1m, and eye inclination angle is 97 ° ± 1 °, and described periphery hole is evenly arranged in the 8th circle circumferentially; The circle footpath of the shallow eye in described outer ring is 10000 ~ 13000mm, and eye is dark is 2.2m ± 0.1m, and eye inclination angle is 99 ° ± 1 °, and the shallow eye in described outer ring is evenly arranged in the 9th circle circumferentially;
When being 4 ~ 5m for described section high, only carry out the slotting of described periphery hole, the circle footpath of described periphery hole is 10000 ~ 13000mm, and eye is dark is 5m ~ 5.1m, and eye inclination angle is 97 ° ± 1 °, and described periphery hole is evenly arranged in the 8th circle circumferentially;
When being 5 ~ 6m for described section high, only carry out the slotting of described periphery hole, the circle footpath of described periphery hole is 10000 ~ 13000mm, and eye is dark is 5m ~ 5.1m, and eye inclination angle is 97 ° ± 1 °, and described periphery hole is evenly arranged in the 8th circle circumferentially;
In the described blashole charge stage, comprising:
The snubber of first lap and the second circle is the forward and reverse powder charge of double detonator, and powder charge is divided into two sections in each detonator, every section of loaded length is 2m ~ 2.5m, middle gap stemming, the top of the snubber of first lap fills the 1st section of detonator, the bottom of the snubber of first lap fills the 2nd section of detonator. and the top of the snubber of the second circle fills the 3rd section of detonator, and the bottom of the snubber of the second circle fills the 4th section of detonator;
Often enclose two adjacent relievers, one of them is the powder charge of double detonator positive direction, and another is single detonator inverse initiation, and in detonator, loaded length is 3.5m ~ 4m; And the reliever of the 3rd circle fills the 5th section of detonator; The reliever of the 4th circle fills the 6th section of detonator; The reliever of the 5th circle fills the 7th section of detonator; The reliever of the 6th circle fills the 8th section of detonator, and the reliever of the 7th circle fills the 8th section of detonator;
The shallow eye of described periphery hole and described outer ring all adopts the forward and reverse powder charge of double detonator, and the shallow eye of described periphery hole and described outer ring all fills the 9th section of detonator;
Describedly to detonate the stage, comprising:
Be connected with each section of detonator one end of primacord, the other end is connected with initiator, operates described initiator and to finish the work the explosion in face.
2. vertical shaft deep-hole step blasting method as claimed in claim 1, wherein,
The circle footpath of the snubber of first lap is 1600 ~ 1900mm, and the snubber of described first lap is evenly arranged in first lap circumferentially;
The circle footpath of the snubber of the second circle is 2200 ~ 2500mm, and the snubber of described second circle is evenly arranged in the second circle circumferentially;
The circle footpath of the reliever of the 3rd circle is 3500 ~ 4000mm, and the reliever of described 3rd circle is evenly arranged in the 3rd circle circumferentially;
The circle footpath of the reliever of the 4th circle is 5000 ~ 5500mm, and the reliever of described 4th circle is evenly arranged in the 4th circle circumferentially;
The circle footpath of the reliever of the 5th circle is 6500 ~ 7000mm, and the reliever of described 5th circle is evenly arranged in the 5th circle circumferentially;
The circle footpath of the reliever of the 6th circle is 8000 ~ 8500mm, and the reliever of described 6th circle is evenly arranged in the 6th circle circumferentially;
The circle footpath of the reliever of the 7th circle is 9500 ~ 9900mm, and the reliever of described 7th circle is evenly arranged in the 7th circle circumferentially.
3. vertical shaft deep-hole step blasting method as claimed in claim 2, wherein,
The circle footpath of the snubber of first lap is 1800mm, and eye spacing is 404mm, and the quantity of the snubber of described first lap is 14;
The circle footpath of the snubber of the second circle is 2400mm, and eye spacing is 503mm, and the quantity of the snubber of described second circle is 15;
The circle footpath of the reliever of the 3rd circle is 3780mm, and eye spacing is 625mm, and the quantity of the reliever of described 3rd circle is 19;
The circle footpath of the reliever of the 4th circle is 5160mm, and eye spacing is 703mm, and the quantity of the reliever of described 4th circle is 23;
The circle footpath of the reliever of the 5th circle is 6640mm, and eye spacing is 694mm, and the quantity of the reliever of described 5th circle is 30;
The circle footpath of the reliever of the 6th circle is 8120mm, and eye spacing is 708mm, and the quantity of the reliever of described 6th circle is 36;
The circle footpath of the reliever of the 7th circle is 9600mm, and eye spacing is 700mm, and the quantity of the reliever of described 7th circle is 43.
4. the vertical shaft deep-hole step blasting method as described in any one of claim 1-3, wherein,
Before the shallow eye powder charge in described snubber, described reliever, described periphery hole and described outer ring, described snubber, described reliever, the shallow intraocular of described periphery hole and described outer ring is put into respectively, by water remaining to described snubber, described reliever, the shallow intraocular of described periphery hole and described outer ring and rock dust punching to outside eye by connecting the airduct of high-pressure blast.
5. vertical shaft deep-hole step blasting method as claimed in claim 4, wherein,
The coefficient of charge of the detonator of the shallow intraocular of described periphery hole and described outer ring is 50%.
6. vertical shaft deep-hole step blasting method as claimed in claim 5, wherein,
The eye spacing of described periphery hole is 640mm ± 100mm, and the quantity of described periphery hole is determined by described eye spacing.
7. vertical shaft deep-hole step blasting method as claimed in claim 6, wherein,
The diameter of described snubber, described reliever, the shallow eye of described periphery hole and described outer ring is 45mm ± 10mm.
8. vertical shaft deep-hole step blasting method as claimed in claim 7, wherein,
The interval time of the detonator of adjacent section is 250ms ± 20ms.
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| CN110196002A (en) * | 2019-05-28 | 2019-09-03 | 三明学院 | A kind of safe and efficient blasting construction method of shaft wall hitch |
| CN112595190A (en) * | 2020-12-15 | 2021-04-02 | 中国矿业大学(北京) | Vertical shaft deep hole large circulation blasting construction method |
| CN113883978A (en) * | 2021-10-19 | 2022-01-04 | 太原理工大学 | Tunnel reserved contour protection rock curtain water pressure energy-gathering smooth blasting method |
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