CN110579145A - Charging method for blasting of sector hole of underground mine - Google Patents
Charging method for blasting of sector hole of underground mine Download PDFInfo
- Publication number
- CN110579145A CN110579145A CN201910889787.4A CN201910889787A CN110579145A CN 110579145 A CN110579145 A CN 110579145A CN 201910889787 A CN201910889787 A CN 201910889787A CN 110579145 A CN110579145 A CN 110579145A
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- Prior art keywords
- charging
- hole
- explosive
- section
- blasting
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- 238000005422 blasting Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000002360 explosive Substances 0.000 claims abstract description 54
- 230000008878 coupling Effects 0.000 abstract description 18
- 238000010168 coupling process Methods 0.000 abstract description 18
- 238000005859 coupling reaction Methods 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000004880 explosion Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000011435 rock Substances 0.000 description 5
- 230000000977 initiatory effect Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000005065 mining Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
the invention aims to solve the problems in the existing underground fan-shaped hole blasting technology, provides a charging method for underground mine fan-shaped hole blasting, and belongs to the technical field of underground fan-shaped hole blasting. The method comprises the following steps: 1) in the upward sector holes, charging each sector blast hole in two sections: the upper charging section adopts coupled charging, namely the charging diameter is consistent with the diameter of a blast hole; the lower explosive charging section adopts non-coupling explosive charging, namely the explosive charging diameter is smaller than the diameter of a blast hole; 2) two charges in the same blast hole are detonated by using a detonator in the same section, the detonating explosive charges are respectively arranged at the top ends of the upper charge section and the lower charge section, and the upper section and the lower section are enhanced to transfer explosion by using detonating cords and are blasted at one time. The method changes the line charge density by partially coupling charge and partially non-coupling charge in the same hole, improves the blasting effect of the fan-shaped blast hole, and saves the explosive quantity.
Description
Technical Field
The invention belongs to the technical field of underground fan-shaped hole blasting, and particularly relates to a method for changing linear explosive loading density by partially coupling explosive loading and partially non-coupling explosive loading in the same hole.
background
The sublevel caving method without bottom pillar is a main mining method for metal mine underground mining, and the method mostly adopts upward fan-shaped hole distribution, and because of the characteristics of the fan-shaped hole distribution, the hole bottom spacing of the fan-shaped holes is large, and the hole opening spacing is small.
At present, the fan-shaped deep hole charging adopts deep hole continuous charging, and has the defects that the charging from the hole opening to the hole bottom is realized by filling the explosive in the hole, namely, coupled charging, and the linear charging density is not changed. Under the condition of the same linear charge density, the fan-shaped holes are distributed relatively dispersedly at the hole bottom and distributed relatively densely at the hole opening, so that the broken block degree of the hole bottom rock mass is large after blasting, the broken block degree of the hole opening rock mass is smaller, the broken block rate is high after blasting, the block degree is uneven, the shoveling efficiency is influenced, and the waste of explosive is caused.
Disclosure of Invention
The invention aims to solve the problem of uneven bulkiness in the existing medium-length hole blasting technology, and provides a charging method for underground mine sector hole blasting.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a charging method for blasting of a sector hole of an underground mine comprises the following steps:
1) In the upward sector blast holes, charging each sector blast hole in two sections: the upper charging section adopts coupled charging, namely the charging diameter is consistent with the diameter of a blast hole; the lower charging section adopts non-coupling charging, namely the charging diameter is smaller than the diameter of a blast hole.
2) two explosive charging parts in the same blast hole are detonated by using a detonator in the same section, the detonating explosive charges are respectively arranged at the top ends of the upper explosive charging section and the lower explosive charging section, and the detonating explosive is enhanced by using a detonating cord which is positioned in the whole explosive charging section in the hole for primary blasting.
Further, in the charging method for the down-hole mine fan-shaped hole blasting, in the step 1), the charging section is positioned at the upper part of the blast hole and occupies 55-60% of the length of the blast hole; the lower explosive loading section is positioned in the middle of the blast hole and accounts for 25-30% of the length of the blast hole; the lower part of the blast hole accounts for 10-15% of the length of the blast hole, and is used as a hole opening section for plugging.
Further, in the charging method for the underground mine fan-shaped hole blasting, in the step 1), the decoupling coefficient of the decoupling charging is 1.3-1.6 (the decoupling coefficient is the ratio of the aperture to the diameter of the explosive cartridge).
Compared with the prior art, the invention has the advantages that:
The variable linear density charging method of the upper half section coupling charging and the lower half section non-coupling charging is adopted, so that the blasting effect is effectively improved, and the explosive unit consumption is reduced.
Drawings
FIG. 1 is a schematic view of the arrangement of blastholes of the present invention;
FIG. 2 is a schematic illustration of a coupled charge and an uncoupled charge of the present invention;
FIG. 3 is a schematic view of the position of the primary charge of the present invention.
The explosive charging device comprises an upper explosive charging section 1, a lower explosive charging section 2, a hole section 3, a coupling explosive charging section 4, a non-coupling explosive charging section 5, a hole plugging section 6, an initiating explosive charge of the upper explosive charging section 7, an initiating explosive charge of the lower explosive charging section 8 and an detonating fuse 9.
Detailed Description
Example 1
A charging method for blasting underground ore sector holes in a certain underground iron ore comprises the following steps:
1. In an upward sectorial borehole, as shown in fig. 1, fig. 1 is a schematic view of the arrangement of boreholes of the present invention, each sectorial borehole being divided into three sections: an upper explosive loading section 1, a lower explosive loading section 2 and an orifice section 3.
2. As shown in fig. 2, the charging of the blast hole is carried out in two stages: the upper charging section 1 adopts coupled charging 4, namely the charging diameter is consistent with the diameter of a blast hole, and a charging vehicle or a BQF100 charging device is adopted for continuous charging; the lower explosive loading section 2 adopts uncoupled explosive loading 5, adopts a cartridge less than 1.3 of the diameter of the blast hole (namely the uncoupled coefficient is 1.3) to carry out manual explosive loading, or adopts a plastic pipe less than 1.3 times of the diameter of the blast hole, and charges explosive by a charging device. The orifice plug 6 is positioned at the orifice section 3 and is plugged by stemming or other stuffing and tamped by a bamboo rod or a wooden stemming.
3. the coupling charge 4 accounts for 55% of the length of the blast hole, the non-coupling charge 5 accounts for 30% of the length of the blast hole, and the orifice plug 6 accounts for 15% of the length of the blast hole. When each hole is filled with powder, the powder filling length is marked on the powder filling pipe, so that the powder filling precision is ensured.
4. The upper explosive charging section initiating explosive package 7 is arranged at the uppermost part of the coupled explosive charging 4, the lower explosive charging section initiating explosive package 8 is arranged at the uppermost part of the uncoupled explosive charging 5, the booster detonation is enhanced by adopting an explosive fuse 9, and the explosive fuse 9 is positioned in the whole explosive charging section in the hole.
5. the upper and lower charging sections in the same blast hole are detonated by using detonators in the same section.
The average block diameter of the ore at the bottom of the hole is 352mm, the average block diameter of the ore at the opening of the hole is 332mm, the large blocks with the opening of more than 600mm account for 6 percent, and the average block diameter of the bottom of the hole and the opening of the hole is 342 mm.
comparative example 1
The upper and lower charge sections are all coupled charges, and the rest is the same as the embodiment 1.
The average block diameter of ore at the bottom of the hole is 357mm, the large blocks larger than 600mm account for 13%, the average block diameter of ore at the hole opening is 463mm, and the average block diameter of the hole bottom and the hole opening is 410 mm.
Example 2
The charging method for blasting iron ore sector holes in a certain area is the same as that in the example 1 except that the non-coupling coefficient in the step 2 is 1.6, the coupling charging in the step 3 accounts for 60% of the length of the blast hole, the non-coupling charging accounts for 30% of the length of the blast hole, and the orifice plugging 6 accounts for 10% of the length of the blast hole.
The average block diameter of ore in the hole bottom rock mass is 356mm, and the average block diameter of ore in the hole opening rock mass is 330 mm. The mass larger than 600mm accounts for 5.8%, and the average diameter of the mass between the bottom and the opening is 343 mm.
Example 3
The charging method for blasting iron ore sector holes in a certain area is the same as that in the example 1 except that the non-coupling coefficient is 1.4 in the step 2, the coupling charging accounts for 60% of the length of the blast hole, the non-coupling charging accounts for 25% of the length of the blast hole and the orifice plugging 6 accounts for 15% of the length of the blast hole in the step 3.
The average block diameter of the ore at the bottom of the hole is 352mm, and the average block diameter of the ore at the hole opening is 330 mm. The lumps larger than 600mm account for 5.1% and the average hole bottom and hole opening lump diameter is 341 mm.
Example 4
The charging method for blasting iron ore sector holes in a certain area is the same as that of the embodiment 1 except that the uncoupled coefficient is 1.5 in the step 2, the coupled charge accounts for 58.5 percent of the length of the blast hole, the uncoupled charge accounts for 29 percent of the length of the blast hole and the orifice stopper 6 accounts for 12.5 percent of the length of the blast hole in the step 3.
The average block diameter of the ore at the bottom of the hole is 350mm, and the average block diameter of the ore at the hole opening is 334 mm. The lumps larger than 600mm accounted for 4.9%, and the average lump diameter of the bottom and mouth of the hole was 342 mm.
The block rate of the embodiment is about 8% lower than that of the embodiment 1, and the block rate is obviously reduced; the average block size is about 67mm, and the uniformity of the rock is obviously improved.
Claims (3)
1. A charging method for blasting of a sector hole of an underground mine is characterized by comprising the following steps:
1) In the upward sector blast holes, charging each sector blast hole in two sections: the upper explosive loading section adopts coupled explosive loading, and the lower explosive loading section adopts non-coupled explosive loading;
2) two explosive charging parts in the same blast hole are detonated by using a detonator in the same section, the detonating explosive charges are respectively arranged at the top ends of the upper explosive charging section and the lower explosive charging section, and the detonating explosive is enhanced by using a detonating cord which is positioned in the whole explosive charging section in the hole for primary blasting.
2. The charging method for the sector hole blasting of the underground mine according to claim 1, wherein in the step 1), the charging section is positioned at the upper part of the blast hole and accounts for 55-60% of the length of the blast hole; the lower explosive loading section is positioned in the middle of the blast hole and accounts for 25-30% of the length of the blast hole; the lower part of the blast hole accounts for 10-15% of the length of the blast hole, and is used as a hole opening section for plugging.
3. A charging method for sector hole blasting of a downhole mine according to claim 1, wherein in the step 1), the uncoupled charge has an uncoupled coefficient of 1.3-1.6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910889787.4A CN110579145A (en) | 2019-09-20 | 2019-09-20 | Charging method for blasting of sector hole of underground mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910889787.4A CN110579145A (en) | 2019-09-20 | 2019-09-20 | Charging method for blasting of sector hole of underground mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110579145A true CN110579145A (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910889787.4A Pending CN110579145A (en) | 2019-09-20 | 2019-09-20 | Charging method for blasting of sector hole of underground mine |
Country Status (1)
| Country | Link |
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| CN (1) | CN110579145A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137898A (en) * | 2021-03-25 | 2021-07-20 | 中国能源建设集团广西水电工程局有限公司 | Cofferdam blasting demolition method based on combination of variable linear density charging and digital electronic detonator |
| CN113959284A (en) * | 2021-09-30 | 2022-01-21 | 宏大爆破工程集团有限责任公司 | Step blasting method for reducing sand aggregate mine fines |
Citations (6)
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|---|---|---|---|---|
| CN203443483U (en) * | 2013-07-29 | 2014-02-19 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Blast hole charging structure for mining and blasting |
| CN104880134A (en) * | 2015-06-08 | 2015-09-02 | 攀钢集团矿业有限公司 | Blasthole charging structure and brow line protection method |
| CN105651127A (en) * | 2016-01-28 | 2016-06-08 | 中钢集团马鞍山矿山研究院有限公司 | Charge system for advance rock breaking of surface mine |
| KR101695384B1 (en) * | 2016-04-06 | 2017-01-11 | 이동주 | Granite quarry blasting method using precision explosives |
| CN109029170A (en) * | 2018-08-30 | 2018-12-18 | 西北矿冶研究院 | Method for improving medium-length hole blasting effect |
| CN109631698A (en) * | 2018-11-09 | 2019-04-16 | 北方爆破科技有限公司 | A kind of space interval charge explosion method reducing boulder yield |
-
2019
- 2019-09-20 CN CN201910889787.4A patent/CN110579145A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203443483U (en) * | 2013-07-29 | 2014-02-19 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Blast hole charging structure for mining and blasting |
| CN104880134A (en) * | 2015-06-08 | 2015-09-02 | 攀钢集团矿业有限公司 | Blasthole charging structure and brow line protection method |
| CN105651127A (en) * | 2016-01-28 | 2016-06-08 | 中钢集团马鞍山矿山研究院有限公司 | Charge system for advance rock breaking of surface mine |
| KR101695384B1 (en) * | 2016-04-06 | 2017-01-11 | 이동주 | Granite quarry blasting method using precision explosives |
| CN109029170A (en) * | 2018-08-30 | 2018-12-18 | 西北矿冶研究院 | Method for improving medium-length hole blasting effect |
| CN109631698A (en) * | 2018-11-09 | 2019-04-16 | 北方爆破科技有限公司 | A kind of space interval charge explosion method reducing boulder yield |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137898A (en) * | 2021-03-25 | 2021-07-20 | 中国能源建设集团广西水电工程局有限公司 | Cofferdam blasting demolition method based on combination of variable linear density charging and digital electronic detonator |
| CN113137898B (en) * | 2021-03-25 | 2022-10-21 | 中国能源建设集团广西水电工程局有限公司 | Cofferdam blasting demolition method based on combination of variable-linear-density charging and digital electronic detonator |
| CN113959284A (en) * | 2021-09-30 | 2022-01-21 | 宏大爆破工程集团有限责任公司 | Step blasting method for reducing sand aggregate mine fines |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20191217 |