CN111721174A - Secondary blasting method for medium-length hole of pre-control roof chamber - Google Patents
Secondary blasting method for medium-length hole of pre-control roof chamber Download PDFInfo
- Publication number
- CN111721174A CN111721174A CN202010613634.XA CN202010613634A CN111721174A CN 111721174 A CN111721174 A CN 111721174A CN 202010613634 A CN202010613634 A CN 202010613634A CN 111721174 A CN111721174 A CN 111721174A
- Authority
- CN
- China
- Prior art keywords
- blasting
- hole
- medium
- roof chamber
- blast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a secondary blasting method for a deep hole in a pre-control roof chamber, belonging to the technical field of blasting. The invention aims to provide a secondary blasting method for a medium-length hole of a pre-control roof chamber, which solves the problems of large blasting blocks of the medium-length hole and disturbance to residents due to vibration. The invention comprises the following steps: A. determining the spacing and row spacing of blasting holes; B. drilling blast holes to the pre-control roof chamber, and controlling the blast hole deflection rate; C. filling explosives into the blast hole and carrying out first blasting, wherein the filling depth is half of the depth of the blast hole; D. and filling explosive into the residual medium-length hole and performing secondary blasting.
Description
Technical Field
The invention relates to a secondary blasting method for a deep hole in a pre-control roof chamber, belonging to the technical field of blasting.
Background
The main process of medium-length hole blasting is to convey explosives into blasting holes and then to use an initiating device to detonate to complete the operation. However, in the actual blasting process, the medium-length hole blasting is large in large blocks and the blasting vibration is large, so that the shoveling, loading and unloading efficiency is affected, and in addition, the ground vibration disturbs residents.
Disclosure of Invention
The invention aims to provide a secondary blasting method for a medium-length hole of a pre-control roof chamber, which solves the problems of large blasting blocks of the medium-length hole and disturbance to residents due to vibration.
The invention relates to a secondary blasting method for a deep hole in a pre-control roof chamber, which comprises the following steps:
A. determining the spacing and row spacing of blasting holes;
B. drilling blast holes to the pre-control roof chamber, and controlling the blast hole deflection rate;
C. filling explosives into the blast hole and carrying out first blasting, wherein the filling depth is half of the depth of the blast hole;
D. and filling explosive into the residual medium-length hole and performing secondary blasting.
Preferably, in the step D, the bottom of the blast hole is plugged before the explosive is filled for the second time.
Preferably, the following steps are further included between steps C and D:
and (5) cleaning rock slag and waste liquid in the blast hole.
Preferably, the first blasting and the second blasting are initiated by millisecond blasting caps.
The invention has the beneficial effects that: flexible operation, small blasting vibration and moderate ore-breaking lumpiness, and improves the production (shoveling and ore-discharging) efficiency.
Detailed Description
A secondary blasting method for a deep hole in a pre-control roof chamber comprises the following steps:
A. determining the spacing and row spacing of blasting holes;
B. drilling blast holes to the pre-control roof chamber, and controlling the blast hole deflection rate;
C. filling explosives into the blast hole and carrying out first blasting, wherein the filling depth is half of the depth of the blast hole;
D. and filling explosive into the residual medium-length hole and performing secondary blasting.
And D, plugging the bottom of the blast hole before filling the explosive for the second time.
Wherein, the following steps are also included between steps C and D:
and (5) cleaning rock slag and waste liquid in the blast hole.
Wherein, the first blasting and the second blasting priming detonators adopt millisecond detonators.
Of course, the foregoing is only a preferred embodiment of the invention and should not be taken as limiting the scope of the embodiments of the invention. The present invention is not limited to the above examples, and equivalent changes and modifications made by those skilled in the art within the spirit and scope of the present invention should be construed as being included in the scope of the present invention.
Claims (4)
1. A secondary blasting method for a deep hole in a pre-control roof chamber is characterized by comprising the following steps:
A. determining the spacing and row spacing of blasting holes;
B. drilling blast holes to the pre-control roof chamber, and controlling the blast hole deflection rate;
C. filling explosives into the blast hole and carrying out first blasting, wherein the filling depth is half of the depth of the blast hole;
D. and filling explosive into the residual medium-length hole and performing secondary blasting.
2. The secondary blasting method for the medium-length hole in the pre-controlled roof chamber as recited in claim 1, wherein: and D, plugging the bottom of the blast hole before filling the explosive for the second time.
3. The secondary blasting method for the medium-length hole in the pre-controlled roof chamber as recited in claim 1, wherein: the method also comprises the following steps between the steps C and D:
and (5) cleaning rock slag and waste liquid in the blast hole.
4. The secondary blasting method for the medium-length hole in the pre-controlled roof chamber as recited in claim 1, wherein: the primary blasting and the secondary blasting are initiated by using millisecond detonators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010613634.XA CN111721174A (en) | 2020-06-30 | 2020-06-30 | Secondary blasting method for medium-length hole of pre-control roof chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010613634.XA CN111721174A (en) | 2020-06-30 | 2020-06-30 | Secondary blasting method for medium-length hole of pre-control roof chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111721174A true CN111721174A (en) | 2020-09-29 |
Family
ID=72570326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010613634.XA Withdrawn CN111721174A (en) | 2020-06-30 | 2020-06-30 | Secondary blasting method for medium-length hole of pre-control roof chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111721174A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114543603A (en) * | 2021-11-23 | 2022-05-27 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Method and device for determining mine blasting side hole distance |
-
2020
- 2020-06-30 CN CN202010613634.XA patent/CN111721174A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114543603A (en) * | 2021-11-23 | 2022-05-27 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Method and device for determining mine blasting side hole distance |
| CN114543603B (en) * | 2021-11-23 | 2023-07-28 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Determination method and device for mine blasting edge hole distance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200929 |
|
| WW01 | Invention patent application withdrawn after publication |