CN105202984A - Blasting method for improving step deep hole blasting quality by using auxiliary blast holes - Google Patents
Blasting method for improving step deep hole blasting quality by using auxiliary blast holes Download PDFInfo
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- CN105202984A CN105202984A CN201510517149.1A CN201510517149A CN105202984A CN 105202984 A CN105202984 A CN 105202984A CN 201510517149 A CN201510517149 A CN 201510517149A CN 105202984 A CN105202984 A CN 105202984A
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Abstract
The invention belongs to the technical field of blasting methods, and particularly relates to a blasting method for improving the step deep hole blasting quality by using auxiliary blastholes, which comprises the steps of determining the auxiliary blastholes, determining the depth of the auxiliary blastholes, selecting different explosives for the blastholes and determining the detonation mode, wherein the problem of higher block rate at the upper part of a step caused by the conditions of larger blast hole blocking length, lower loading gravity center and the like in production is solved by arranging the auxiliary blastholes 2 among deep hole blasthole rows; by adopting the mode of combining the vertical blast holes and the inclined blast holes, the blasting quality can be effectively improved on the premise of not influencing the comprehensive efficiency of perforation and blasting; according to the principle that the diameter of the blast hole is close to or slightly larger than the limit diameter of the explosive, different explosives are selected for the auxiliary blast hole 2 and the main blasting blast hole 1, so that an ideal detonation condition can be created for the explosives, and the energy utilization rate of the explosives is improved.
Description
Technical field
The invention belongs to blasting method technical field, be specifically related to a kind of blasting method utilizing auxiliary gun hole to improve step long-hole blasting quality.
Background technology
During step long-hole blasting, boulder yield is higher is ubiquitous problem in opencut, has had a strong impact on the normal operation of mining production.Find in practice, owing to there is the situations such as stem length is bigger than normal, powder charge center of gravity is on the low side in actual production, big gun hole top free face and position, aperture are reduced by explosive destruction, and step top multiple-row blasting section boulder yield is usually higher compared with other positions more.Therefore, adopt adequate measure to reduce aperture boulder yield, for strictly controlling step deep hole boulder yield on the whole, improve blasting quality tool and be of great significance.
Summary of the invention
Object of the present invention is exactly the blasting method reducing aperture boulder yield when will provide a kind of step medium-length hole blasting, improve blasting quality.
The present invention is achieved through the following technical solutions:
Utilize auxiliary gun hole to improve a blasting method for step long-hole blasting quality, the method is carried out according to following step:
The first step: on quick-fried district step, according to the main blasting hole 1 of matrix pattern Drilling aperture≤80mm, main blasting hole 1 adopts step front end place to be obliquely installed the arrange method that combine vertical with step postmedian and is arranged on quick-fried district step; Other blasting parameters of main blasting hole 1 follow normal step long-hole blasting design and construction principle when design and construction;
Second step: the auxiliary gun hole 2 of the center position Drilling aperture≤75mm between the main blasting hole of every two row, the degree of depth in auxiliary gun hole 2 is 0.8-1.2 times of main blasting hole 1 stemming length; Other blasting parameters in auxiliary gun hole 2 follow normal step shallow blasting design and construction principle when design and construction;
3rd step: the principle should closing on or be a bit larger tham explosive limit diameter according to blasthole diameter, for different explosives is selected from main blasting hole 1 in auxiliary gun hole 2; If mining explosive kind is limited, auxiliary gun hole 2 and main blasting hole 1 also can adopt explosive of the same race;
4th step: according to auxiliary gun hole 2 with main blasting hole 1 according to the order millisecond detonating that diagonal order is detonated or V-shaped is detonated, onepull.
In order to better realize object of the present invention, 1-3 mining inclination big gun hole before in above-mentioned steps (1), main blasting hole 1 and the auxiliary gun hole 2 of rear row all adopt upright opening.
In order to better realize object of the present invention, in above-mentioned steps (2), main blasting hole 1 and auxiliary gun hole 2 all adopt matrix pattern, adopt triangle or quincunx pattern between auxiliary gun hole 2 and main blasting hole 1.
Compared with prior art, beneficial effect of the present invention is:
The present invention is by arranging that between the row of deep hole big gun hole the mode in auxiliary gun hole 2 to overcome in production the higher problem of the step top boulder yield that often causes due to situations such as stem length are bigger than normal, powder charge center of gravity is on the low side; By the mode that main blasting hole 1 adopts vertical hole and inclination big gun hole to combine, under the prerequisite of overall efficiency not affecting perforation and explosion, effectively blasting quality can be improved; The principle of explosive limit diameter should be closed on or be a bit larger tham according to blasthole diameter, for different explosives is selected from main blasting hole 1 in auxiliary gun hole 2, can be the ideal detonation condition that explosive is created, improve the capacity usage ratio of explosive; Meanwhile, auxiliary gun hole 2 and main blasting hole 1, according to the order millisecond detonating that diagonal order is detonated or V-shaped is detonated, are conducive to the generation reducing bulk.
Accompanying drawing explanation
Fig. 1 is excavated big gun hole schematic diagram by the present invention;
Fig. 2 is the schematic top plan view of Fig. 1;
Fig. 3 is diagonal order millisecond detonating schematic diagram, and wherein (a)-(h) represents firing order;
Fig. 4 is V-shaped firing order millisecond detonating schematic diagram, and wherein (a)-(g) represents firing order.
In figure: 1. main blasting hole, 2. auxiliary gun hole.
Detailed description of the invention
Below the present invention is described further:
Utilize auxiliary gun hole to improve a blasting method for step long-hole blasting quality, the method is carried out according to following step:
The first step, as shown in Figure 1 and Figure 2, on quick-fried district step, according to the main blasting hole 1 of matrix pattern Drilling aperture≤80mm, main blasting hole 1 adopts step front end place to be obliquely installed the arrange method that combine vertical with step postmedian and is arranged on quick-fried district step, wherein 1-3 mining inclination big gun hole before quick-fried district step, main blasting hole 1 and the auxiliary gun hole 2 of rear row all adopt upright opening; Other blasting parameters of main blasting hole 1 follow normal step long-hole blasting design and construction principle when design and construction;
Second step, the auxiliary gun hole 2 of the center position Drilling aperture≤75mm between the main blasting hole of every two row, the degree of depth in auxiliary gun hole 2 is 0.8-1.2 times of main blasting hole 1 stemming length, main blasting hole 1 and auxiliary gun hole 2 all adopt matrix pattern, adopt triangle or quincunx pattern between auxiliary gun hole 2 and main blasting hole 1; Other blasting parameters in auxiliary gun hole 2 follow normal step shallow blasting design and construction principle when design and construction;
3rd step, should close on according to blasthole diameter or be a bit larger tham the principle of explosive limit diameter, for different explosives is selected from main blasting hole 1 in auxiliary gun hole 2; If mining explosive kind is limited, auxiliary gun hole 2 and main blasting hole 1 also can adopt explosive of the same race;
4th step, as shown in Figure 3, Figure 4, according to auxiliary gun hole 2 with main blasting hole 1 according to the order millisecond detonating that diagonal order is detonated or V-shaped is detonated, onepull.
Claims (3)
1. utilize auxiliary gun hole to improve a blasting method for step long-hole blasting quality, the method is carried out according to following step:
The first step: on quick-fried district step, according to the main blasting hole (1) of matrix pattern Drilling aperture≤80mm, main blasting hole (1) adopts step front end place to be obliquely installed the arrange method that combine vertical with step postmedian and is arranged on quick-fried region step; Other blasting parameters of blasting hole (1) follow normal step long-hole blasting design and construction principle when design and construction;
Second step: the auxiliary gun hole (2) of the position Drilling aperture≤75mm between the every two main blasting hole of rows (1), the degree of depth of auxiliary gun hole (2) is 0.8-1.2 times of main blasting hole (1) stemming length; Other blasting parameters in auxiliary gun hole (2) follow normal step shallow blasting design and construction principle when design and construction;
3rd step: the principle should closing on or be a bit larger tham explosive limit diameter according to blasthole diameter, for auxiliary gun hole (2) select different explosives from main blasting hole (1); If mining explosive kind is limited, auxiliary gun hole (2) and main blasting hole (1) also can adopt explosive of the same race;
4th step: auxiliary gun hole (2) and main blasting hole (1) according to the order millisecond detonating that diagonal order is detonated or V-shaped is detonated, onepull.
2. a kind of blasting method utilizing auxiliary gun hole to improve step long-hole blasting quality as claimed in claim 1, it is characterized in that: 1-3 mining inclination big gun hole before in described step (1), main blasting hole (1) and auxiliary gun hole (2) of rear row all adopt upright opening.
3. a kind of blasting method utilizing auxiliary gun hole to improve step long-hole blasting quality as claimed in claim 1, it is characterized in that: in described step (2), main blasting hole (1) and auxiliary gun hole (2) all adopt matrix pattern, adopt triangle or quincunx pattern between auxiliary gun hole (2) and main blasting hole (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510517149.1A CN105202984A (en) | 2015-08-21 | 2015-08-21 | Blasting method for improving step deep hole blasting quality by using auxiliary blast holes |
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| CN201510517149.1A CN105202984A (en) | 2015-08-21 | 2015-08-21 | Blasting method for improving step deep hole blasting quality by using auxiliary blast holes |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571419A (en) * | 2016-01-28 | 2016-05-11 | 中钢集团马鞍山矿山研究院有限公司 | Blasting method capable of effectively reducing blasting boulder yield of surface mine |
| CN108661642A (en) * | 2018-04-23 | 2018-10-16 | 北京科技大学 | A kind of method of the nearly upright Bumping Pressure in Coal Layers of depth hole relieving shot prevention |
| CN108952726A (en) * | 2018-07-05 | 2018-12-07 | 鞍钢集团矿业有限公司 | Have an opencast mining of the neighbouring step dislocation perforation method of medium-length hole blasting |
| CN110823034A (en) * | 2019-11-25 | 2020-02-21 | 中交路桥建设有限公司 | Soft rock foundation blasting method capable of controlling mass percentage after blasting |
| CN111307003A (en) * | 2020-03-26 | 2020-06-19 | 包头钢铁（集团）有限责任公司 | Strip mine 24m high step slope expanding blasting method |
| CN112097578A (en) * | 2020-08-13 | 2020-12-18 | 葛洲坝易普力湖南二化民爆有限公司 | Method for controlling root bottom of open-pit limestone mine after blasting |
| CN112683120A (en) * | 2020-12-23 | 2021-04-20 | 中铁十九局集团矿业投资有限公司 | Method for blasting frozen soil layer of surface mine |
| CN112815794A (en) * | 2021-01-26 | 2021-05-18 | 北京中大爆破工程有限公司 | Frozen soil layer blasting method |
| CN113847033A (en) * | 2021-10-29 | 2021-12-28 | 海南矿业股份有限公司 | Mining medium-length hole rock drilling and blasting method |
| CN114705094A (en) * | 2022-03-27 | 2022-07-05 | 甘肃西沟矿业有限公司 | Combined charging structure for improving medium-length hole blasting effect of limestone strip mine |
| CN115060127A (en) * | 2022-06-10 | 2022-09-16 | 大昌建设集团有限公司 | Blasting method and system for equidistantly-distributed hole steps, storage medium and intelligent terminal |
| CN115979085A (en) * | 2023-03-07 | 2023-04-18 | 北京科技大学 | Liquid carbon dioxide blasting method suitable for open-air high steps |
| CN114705094B (en) * | 2022-03-27 | 2024-10-25 | 甘肃西沟矿业有限公司 | Combined charging structure for improving deep hole blasting effect in limestone strip mine |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571419B (en) * | 2016-01-28 | 2017-04-12 | 中钢集团马鞍山矿山研究院有限公司 | Blasting method capable of effectively reducing blasting boulder yield of surface mine |
| CN105571419A (en) * | 2016-01-28 | 2016-05-11 | 中钢集团马鞍山矿山研究院有限公司 | Blasting method capable of effectively reducing blasting boulder yield of surface mine |
| CN108661642A (en) * | 2018-04-23 | 2018-10-16 | 北京科技大学 | A kind of method of the nearly upright Bumping Pressure in Coal Layers of depth hole relieving shot prevention |
| CN108661642B (en) * | 2018-04-23 | 2019-08-06 | 北京科技大学 | A kind of method of the nearly upright Bumping Pressure in Coal Layers of depth hole relieving shot prevention and treatment |
| CN108952726A (en) * | 2018-07-05 | 2018-12-07 | 鞍钢集团矿业有限公司 | Have an opencast mining of the neighbouring step dislocation perforation method of medium-length hole blasting |
| CN110823034A (en) * | 2019-11-25 | 2020-02-21 | 中交路桥建设有限公司 | Soft rock foundation blasting method capable of controlling mass percentage after blasting |
| CN111307003A (en) * | 2020-03-26 | 2020-06-19 | 包头钢铁（集团）有限责任公司 | Strip mine 24m high step slope expanding blasting method |
| CN112097578B (en) * | 2020-08-13 | 2023-02-21 | 葛洲坝易普力湖南二化民爆有限公司 | Method for controlling root bottom of open-pit limestone mine after blasting |
| CN112097578A (en) * | 2020-08-13 | 2020-12-18 | 葛洲坝易普力湖南二化民爆有限公司 | Method for controlling root bottom of open-pit limestone mine after blasting |
| CN112683120A (en) * | 2020-12-23 | 2021-04-20 | 中铁十九局集团矿业投资有限公司 | Method for blasting frozen soil layer of surface mine |
| CN112683120B (en) * | 2020-12-23 | 2021-09-03 | 中铁十九局集团矿业投资有限公司 | Method for blasting frozen soil layer of surface mine |
| CN112815794A (en) * | 2021-01-26 | 2021-05-18 | 北京中大爆破工程有限公司 | Frozen soil layer blasting method |
| CN113847033A (en) * | 2021-10-29 | 2021-12-28 | 海南矿业股份有限公司 | Mining medium-length hole rock drilling and blasting method |
| CN114705094A (en) * | 2022-03-27 | 2022-07-05 | 甘肃西沟矿业有限公司 | Combined charging structure for improving medium-length hole blasting effect of limestone strip mine |
| CN114705094B (en) * | 2022-03-27 | 2024-10-25 | 甘肃西沟矿业有限公司 | Combined charging structure for improving deep hole blasting effect in limestone strip mine |
| CN115060127A (en) * | 2022-06-10 | 2022-09-16 | 大昌建设集团有限公司 | Blasting method and system for equidistantly-distributed hole steps, storage medium and intelligent terminal |
| CN115060127B (en) * | 2022-06-10 | 2024-02-20 | 大昌建设集团有限公司 | Equidistant hole distribution step blasting method, equidistant hole distribution step blasting system, storage medium and intelligent terminal |
| CN115979085A (en) * | 2023-03-07 | 2023-04-18 | 北京科技大学 | Liquid carbon dioxide blasting method suitable for open-air high steps |
| CN115979085B (en) * | 2023-03-07 | 2024-03-19 | 北京科技大学 | Liquid carbon dioxide blasting method suitable for open-air high steps |
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Application publication date: 20151230 |