CN107957222A - Reduce blasthole spaced loading and the method for ignition of methods of blasting toes in open generation rate - Google Patents
Reduce blasthole spaced loading and the method for ignition of methods of blasting toes in open generation rate Download PDFInfo
- Publication number
- CN107957222A CN107957222A CN201711217817.4A CN201711217817A CN107957222A CN 107957222 A CN107957222 A CN 107957222A CN 201711217817 A CN201711217817 A CN 201711217817A CN 107957222 A CN107957222 A CN 107957222A
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- section
- explosive
- blasthole
- stemming
- generation rate
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Classifications
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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
-
- 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)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The present invention provides a kind of blasthole spaced loading for reducing methods of blasting toes in open generation rate and the method for ignition, it is characterised in that comprises the following steps：Step 1. is drilled with the blast hole of certain ultra-deep；Step 2. first forms first segment explosive section to 1.0~1.5 times of blasthole bottom blasthole ultra-deep length range filling explosive, and detonator is laid in the first explosive section, and detonator wire is connected upward with filament；Stemming section is formed at the top that step 3. blocks the first explosive section using stemming, and the length of stemming section is grown for 0.1~0.5 times of explosion toe burden, and filament is put down after the completion of blocking；Step 4. continues to load explosive the second explosive section of formation above stemming section, lays the detonator of explosion design section, and block；All blastholes of step 5. proper detonation.This method can significantly after the explosive charge of elongated pore bottom load action time, so as to improve the capacity usage ratio of explosive and increase the stress intensity of toe burden position rock mass, make the rock mass of chassis location fully broken, so as to reduce the generation rate of methods of blasting toes in open.
Description
Technical field
The invention belongs to engineering explosion technical field, and in particular to a kind of blasthole interval dress for reducing methods of blasting toes in open generation rate
Medicine and the method for ignition.
Technical background
Emergence and constantly improve with large and medium-sized drilling machine, the application of Open Medium-depth Hole Bench Cut Blasting are more and more wider
It is general.After Long-hole Bench Blasting detonates by row, often arrange rock and stirred by row toward oblique upper, due to stirring by preceding for heel row shot rock
The limitation of one row, the space of its diffusion of detonating is opposite to diminish, and is subject to the clamping action of front-seat rock, and heel row rock stirs needs
The resistance bigger overcome, so foundation can be left under normal circumstances.Clear up foundation and secondary blasting workload is big, influence shovel dress effect
Rate, and add the generation of equipment attrition and failure, has not only been unfavorable for the safety of personnel and equipment, but influence production it is normal into
OK.
The currently used method for reducing methods of blasting toes in open is the appropriate ultra-deep in drilling, and the effect of ultra-deep is reduced in powder charge
The position of the heart, effectively to overcome the resistance of the bottom of the steps, avoids or reduces to stay foundation, to form smooth bottom square position,
The detonation pressure that bench blasting explosive provides can generally reach the quick-fried effect except rock mass, but usually because of explosive action time not
Enough do not reach purpose, so even if ultra-deep explosion, can often be left because of the quick effusion of tamper and detonation product yet
Methods of blasting toes in open；Ameliorative way also is to change blasthole close coefficient or change detonating technique mostly, (referring to：Chen Jingjing, Zhao
Rich deep, the strange of white jade reduces engineering practice [J] engineering explosions of Long-hole Bench Blasting foundation, 2013,19 (03) through mountain temple iron ore:
30-32.)。
Also there are many improved technologies in terms of multiple-row blasting at present, if 104374239 A of patent CN are in aperture blocking section
Buffer air bag group is set, reduces plugging material dosage, prevents blasthole punching, this obstruction method trouble, worker arranges that multistage delays
Air-impulse bag is time-consuming more much bigger than one whole section of stemming blocking of arrangement, and when blasthole global blowup energy is bigger than normal, quick-fried heap throwing scope is big, easily
Slungshot harm is produced, when blasthole global blowup energy is less than normal, boulder yield is high, easily leaves methods of blasting toes in open；Patent CN
In demolition blasting, aperture blocks section and sets water bag fill area and cement fill area 106197179 A, prevents the mistake of explosion energy
It is early to leak from blasthole mouth, so as to improve capacity usage ratio, explosive specific charge, this obstruction method trouble are reduced, the set-up time is grown,
And cement anchoring agent solidification must also be waited can not to improve construction efficiency.
The content of the invention
The present invention is to carry out to solve the above-mentioned problems, and it is an object of the present invention to provide a kind of reduction methods of blasting toes in open generation rate
Blasthole spaced loading and the method for ignition, can quickly, convenient reduce earth material water content.
The present invention to achieve these goals, employs following scheme：
The present invention provides a kind of blasthole spaced loading for reducing methods of blasting toes in open generation rate and the method for ignition, it is characterised in that
Comprise the following steps：Step 1. is drilled with the blast hole of certain ultra-deep；Step 2. first surpasses 1.0~1.5 times of blasthole bottom blasthole
Deep length scope filling explosive forms first segment explosive section, and lays detonator in the first explosive section, and detonator wire is connected with filament
Connect and be pulled up；Stemming section formed at the top that step 3. blocks the first explosive section using stemming, the length of stemming section for 0.1~
0.5 times of explosion toe burden length, filament is put down after the completion of blocking；Step 4. continues to load explosive above stemming section forms the
Two explosive sections, lay the detonator of explosion design section, and block；All blastholes of step 5. proper detonation.
The blasthole spaced loading provided by the present invention for reducing methods of blasting toes in open generation rate and the method for ignition, can also have this
The feature of sample：In step 2, the detonator of laying is preferably MS1 sections of non-electric shock conducting tube detonators, makes of middle and upper part and base charge
The quick-fried time difference is as far as possible small.
The blasthole spaced loading provided by the present invention for reducing methods of blasting toes in open generation rate and the method for ignition, can also have this
The feature of sample：In step 2, the filling length of the first explosive section is 1.25 times of blasthole ultra-deep length, such best results.
The blasthole spaced loading provided by the present invention for reducing methods of blasting toes in open generation rate and the method for ignition, can also have this
The feature of sample：In step 3, the filling length of stemming section is grown for 0.3 times of explosion toe burden, such best results.
The blasthole spaced loading provided by the present invention for reducing methods of blasting toes in open generation rate and the method for ignition, can also have this
The feature of sample：In step 3, the density of stemming is not less than 1.8g/cm3, the coefficient of kinetic friction is not less than 0.4.The effect of invention with
Effect
Compared with prior art, the beneficial effects of the present invention are：
(1) compared with traditional step ultra-deep blasting method, blasthole lower part closes on bottom hole position and adds big gun section, by blasthole bottom
The explosive in portion is spaced apart with the explosive of middle and upper part, the detonator that explosion design determines section is laid in the explosive of middle and upper part, in bottom
Explosive in lay detonator, bottom detonator wire is incorporated into the explosive of middle and upper part, and the energy after the explosive proper detonation of middle and upper part swashs
Portion's Nonel detonator is given, so that the lower part explosive that detonates, this method can effectively block quick during the explosive charge of middle and upper part
The rarefaction wave propagated to blast hole bottom hole, can significantly load be made after the explosive charge of elongated pore bottom plus the ponding of stemming section
With the time, so as to improve the capacity usage ratio of explosive and increase the stress intensity of toe burden position rock mass, make chassis location
Rock mass it is fully broken, substantially reduce methods of blasting toes in open generation rate；
(2) greatly reduce secondary blasting workload, and accelerate the duration, while also greatly reduce hand labor intensity, and
Reduce equipment attrition and failure；
To sum up, the present invention, which has, reduces methods of blasting toes in open generation rate, accelerates the duration, reduces hand labor intensity, reduces equipment
The characteristics of abrasion and failure, it can be widely applied in the domain engineering explosion such as water conservancy and hydropower, mine, traffic.
Brief description of the drawings
Fig. 1 is the structure diagram after the blast hole projectile filling in the embodiment of the present invention.
In figure, 1 is ultra-deep part, and 2 be the first explosive section, and 3 be MS1 sections of non-electric shock conducting tube detonators, and 4 be bottom detonator foot
Line, 5 be that section is blocked in hole, and 6 be the second explosive section, and 7 block section to determine the detonator of section, 8 for aperture, and 9 be detonator, and 10 are
Rock mass.
Embodiment
Below in conjunction with blasthole spaced loading of the attached drawing to reduction methods of blasting toes in open generation rate of the present invention and the method for ignition
Specific embodiment be described in detail.
<Embodiment>
Certain mining design shoulder height 20m, bore diameter 250mm, an array pitch 10*7.5m, using explosion velocity 3500~
The emulsion of 4200m/s, blast hole stemming 6.5m, ultra-deep 1.5m, but early period work progress borehole blasting foundation generation rate compared with
The problem of big, does not solve all the time.Therefore use a kind of reduction methods of blasting toes in open generation rate proposed by the invention blasthole spaced loading with
The method of ignition reduces its methods of blasting toes in open generation rate.
The blasthole spaced loading that the present embodiment is provided includes the following steps with the method for ignition：
Step 1. is drilled with diameter 250mm, high the 21.5m wherein blast hole of ultra-deep 1.5m on rock mass 10.
Step 2. forms the first explosive section 2 to the emulsion of injection length 1.5m in ultra-deep part 1, and in the first explosive
MS1 sections of non-electric shock conducting tube detonators 3 are laid in section 2, its detonator wire 4 is connected and is pulled up with filament.
After step 3. blasthole bottom filling explosive, blocked to form in hole blocking section 5 with stemming, the length of the blocking section 5 is
2.0m, filament is put down after the completion of blocking so that trailed detonator wire 4, which can run through, to be blocked section 5 and expose upwards.
Step 4., which continues to inject 11.5m emulsions, forms the second explosive section 6, lays MS5 sections of detonators 7, be connected to lead it is quick-fried
Pipe 9；Last aperture 6.5m long is blocked to form aperture blocking section 8 with stemming.
Step 5. checks blasting circuit, all blastholes of detonating after confirmation safety.
Above example is only the illustration done to technical solution of the present invention.Reduction explosion according to the present invention
The blasthole spaced loading of foundation generation rate is not merely defined in described content in the embodiment above with the method for ignition, and
It is to be subject to claim limited range.What those skilled in the art of the invention were done on the basis of the embodiment appoints
What is changed or supplement or equivalence replacement, all in the claimed scope of the claim of the present invention.
Claims (5)
1. a kind of blasthole spaced loading for reducing methods of blasting toes in open generation rate and the method for ignition, it is characterised in that comprise the following steps：
Step 1. is drilled with the blast hole of certain ultra-deep；
Step 2. first forms 1.0~1.5 times of blasthole ultra-deep length ranges in blasthole bottom filling explosive the first explosive section, and the
Detonator is laid in one explosive section, detonator wire line is connected and is pulled up；
Stemming section is formed at the top that step 3. blocks the first explosive section using stemming, and the length of stemming section is 0.1~0.5 times of explosion
Toe burden is grown, and line is put down after the completion of blocking；
Step 4. continues to load explosive the second explosive section of formation above stemming section, lays the detonator of explosion design section, and block up
Plug；
All blastholes of step 5. proper detonation.
2. the blasthole spaced loading according to claim 1 for reducing methods of blasting toes in open generation rate and the method for ignition, its feature exist
In：
Wherein, in step 2, the detonator of laying is MS1 sections of non-electric shock conducting tube detonators.
3. the blasthole spaced loading according to claim 1 for reducing methods of blasting toes in open generation rate and the method for ignition, its feature exist
In：
Wherein, in step 2, the filling length of the first explosive section is 1.25 times of blasthole ultra-deep length.
4. the blasthole spaced loading according to claim 1 for reducing methods of blasting toes in open generation rate and the method for ignition, its feature exist
In：
Wherein, in step 3, the filling length of stemming section is grown for 0.3 times of explosion toe burden.
5. the blasthole spaced loading according to claim 1 for reducing methods of blasting toes in open generation rate and the method for ignition, its feature exist
In：
Wherein, in step 3, the density of stemming is not less than 1.8g/cm3, the coefficient of kinetic friction is not less than 0.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711217817.4A CN107957222A (en) | 2017-11-28 | 2017-11-28 | Reduce blasthole spaced loading and the method for ignition of methods of blasting toes in open generation rate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711217817.4A CN107957222A (en) | 2017-11-28 | 2017-11-28 | Reduce blasthole spaced loading and the method for ignition of methods of blasting toes in open generation rate |
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| Publication Number | Publication Date |
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| CN107957222A true CN107957222A (en) | 2018-04-24 |
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| CN201711217817.4A Pending CN107957222A (en) | 2017-11-28 | 2017-11-28 | Reduce blasthole spaced loading and the method for ignition of methods of blasting toes in open generation rate |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506530A (en) * | 2018-12-21 | 2019-03-22 | 包头钢铁（集团）有限责任公司 | A kind of opencut 24m High-bench blasting expands side structure and its side method is expanded in explosion |
| CN109631698A (en) * | 2018-11-09 | 2019-04-16 | 北方***科技有限公司 | A kind of space interval charge explosion method reducing boulder yield |
| CN110906822A (en) * | 2019-12-19 | 2020-03-24 | 中国水利水电第七工程局有限公司 | Deep hole blasting charge and detonation method for reducing root bottom based on digital detonator |
| CN111207639A (en) * | 2020-03-20 | 2020-05-29 | 本钢板材股份有限公司 | Method for overcoming large chassis line resistance through deep hole blasting of strip mine |
| CN111238328A (en) * | 2020-03-02 | 2020-06-05 | 中铁十八局集团有限公司 | Compound peripheral eye and tunnel efficient vibration reduction and smooth surface smooth bottom blasting method |
| CN111895872A (en) * | 2020-08-28 | 2020-11-06 | 长安大学 | In-hole charging structure for controlling blasting root bottom and construction method thereof |
| CN114111483A (en) * | 2021-11-30 | 2022-03-01 | 广州铁路投资建设集团有限公司 | Can reduce demolition unit of deep basal pit stone square blasting bold rate |
| CN114526649A (en) * | 2021-12-16 | 2022-05-24 | 江睿 | Preparation method of simple ammonium nitrate fuel oil explosive for drilling |
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| CN1235269A (en) * | 1998-05-09 | 1999-11-17 | 蔡清海 | Sectional separate explosion in a hole |
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| CN1235269A (en) * | 1998-05-09 | 1999-11-17 | 蔡清海 | Sectional separate explosion in a hole |
| CN105444633A (en) * | 2015-11-18 | 2016-03-30 | 西北矿冶研究院 | Bench blasting charge structure capable of reducing block rate of blast hole blocking section |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631698A (en) * | 2018-11-09 | 2019-04-16 | 北方***科技有限公司 | A kind of space interval charge explosion method reducing boulder yield |
| CN109506530A (en) * | 2018-12-21 | 2019-03-22 | 包头钢铁（集团）有限责任公司 | A kind of opencut 24m High-bench blasting expands side structure and its side method is expanded in explosion |
| CN110906822A (en) * | 2019-12-19 | 2020-03-24 | 中国水利水电第七工程局有限公司 | Deep hole blasting charge and detonation method for reducing root bottom based on digital detonator |
| CN111238328A (en) * | 2020-03-02 | 2020-06-05 | 中铁十八局集团有限公司 | Compound peripheral eye and tunnel efficient vibration reduction and smooth surface smooth bottom blasting method |
| CN111238328B (en) * | 2020-03-02 | 2022-08-02 | 中铁十八局集团有限公司 | Compound peripheral eye and tunnel efficient vibration reduction and smooth surface smooth bottom blasting method |
| CN111207639A (en) * | 2020-03-20 | 2020-05-29 | 本钢板材股份有限公司 | Method for overcoming large chassis line resistance through deep hole blasting of strip mine |
| CN111895872A (en) * | 2020-08-28 | 2020-11-06 | 长安大学 | In-hole charging structure for controlling blasting root bottom and construction method thereof |
| CN111895872B (en) * | 2020-08-28 | 2022-08-19 | 长安大学 | In-hole charging structure for controlling blasting root bottom and construction method thereof |
| CN114111483A (en) * | 2021-11-30 | 2022-03-01 | 广州铁路投资建设集团有限公司 | Can reduce demolition unit of deep basal pit stone square blasting bold rate |
| CN114526649A (en) * | 2021-12-16 | 2022-05-24 | 江睿 | Preparation method of simple ammonium nitrate fuel oil explosive for drilling |
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Application publication date: 20180424 |
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