CN114111483A - Can reduce demolition unit of deep basal pit stone square blasting bold rate - Google Patents
Can reduce demolition unit of deep basal pit stone square blasting bold rate Download PDFInfo
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- CN114111483A CN114111483A CN202111446282.4A CN202111446282A CN114111483A CN 114111483 A CN114111483 A CN 114111483A CN 202111446282 A CN202111446282 A CN 202111446282A CN 114111483 A CN114111483 A CN 114111483A
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- blasting
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- explosive
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- 238000005422 blasting Methods 0.000 title claims abstract description 94
- 239000004575 stone Substances 0.000 title claims abstract description 21
- 239000002360 explosive Substances 0.000 claims abstract description 43
- 230000000977 initiatory effect Effects 0.000 claims abstract description 6
- 230000000903 blocking effect Effects 0.000 claims abstract description 5
- 238000005474 detonation Methods 0.000 claims abstract description 3
- 230000003247 decreasing effect Effects 0.000 claims 2
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
Abstract
The invention discloses a blasting device capable of reducing the stone blasting block rate of a deep foundation pit, which comprises: the multiple rows of the blasting hole groups are arranged in a pre-blasting area, all the blasting hole groups in the multiple rows of the blasting hole groups are parallel to each other, and each blasting hole group comprises multiple blasting holes; each blast hole is provided with the blasting unit, the blasting unit includes: the explosive charging structure comprises a detonation unit and an explosive charging structure, wherein the explosive charging structure sequentially comprises a blocking section, a first explosive charging section, a spacing section and a second explosive charging section from top to bottom; the first charge section and the second charge section are both connected with the initiation unit, and the unit consumption q of the first charge section and the second charge section is 0.38kg/m3‑0.42kg/m3. The first explosive loading section and the second explosive loading section in the blasting unit are filled in the blast hole filling section, unit consumption is properly increased, blasting stress is concentrated, and the generation of the large block rate can be effectively reduced.
Description
Technical Field
The invention relates to the technical field of blasting structures, in particular to a blasting device capable of reducing the stone blasting block rate of a deep foundation pit.
Background
The mass rate after the stone blasting is a main index for measuring the quality of the blasting effect, the mass rate is too high and is difficult to transport through a grab bucket, secondary crushing is needed through a secondary blasting machine, the clearing and transporting efficiency is low, the construction progress of the project is restricted, the secondary crushing cost is increased, and the digging and loading loss is increased by blasting the mass.
Through investigation on the blasting rock mass of blasting, the distribution position of the block rate is mainly concentrated in the blasting hole filling section, and the section is slightly influenced by the blasting stress wave due to non-charging, so that the generation of the block is preliminarily judged to have a certain relation with charging.
Disclosure of Invention
The invention mainly solves the technical problem of providing the explosive for filling the vector in the filling section of the blasting unit, which can reduce the influence of blasting stress and reduce the generation of large block rate after blasting.
The application provides a can reduce demolition unit of deep basal pit cubic meter of stone blasting rate, include:
the multiple rows of the blasting hole groups are arranged in a pre-blasting area, all the blasting hole groups in the multiple rows of the blasting hole groups are parallel to each other, and each blasting hole group comprises multiple blasting holes;
each blast hole is provided with the blasting unit, the blasting unit includes: the explosive charging structure comprises a detonation unit and an explosive charging structure, wherein the explosive charging structure sequentially comprises a blocking section, a first explosive charging section, a spacing section and a second explosive charging section from top to bottom; the first charge section and the second charge section are both connected with the initiation unit, and the unit consumption q of the first charge section and the second charge section is 0.38kg/m3-0.42kg/m3。
In one embodiment, the line of least resistance W of the blast hole is 0.8m to 1.1 m.
In one embodiment, a hole distance a between two adjacent blast holes in the blast hole groups is 1.0m to 1.3m, and a distance b between two adjacent rows of the blast hole groups is 0.8m to 1.1 m.
In one embodiment, the blast hole has a hole depth L of 3.0m to 4.5 m.
In one embodiment, the length of the plugged section is 1.0m-2.0 m.
In one embodiment, the length of the spacer is 0.5m to 1.0 m.
In one embodiment, the sum of the weights of the explosive contained in the first charge segment and the explosive contained in the second charge segment is between 2.0 and 2.5 kg.
According to the blasting device capable of reducing the stone blasting bulk fraction of the deep foundation pit, the first explosive loading section and the second explosive loading section in the blasting unit are filled in the blast hole filling section, unit consumption is properly increased, blasting stress is concentrated, and the bulk fraction can be effectively reduced.
Drawings
Fig. 1 is a schematic structural diagram of a plurality of rows of blast hole groups in a blasting device capable of reducing the stone blasting bulk rate of a deep foundation pit provided by the present application;
fig. 2 is a schematic structural diagram of a blasting unit in the blasting device capable of reducing the stone blasting bulk rate of the deep foundation pit.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
The application provides a can reduce demolition unit of deep basal pit cubic meter of stone blasting rate, is applied to deep basal pit's blasting, can effectively reduce the production of cubic meter after the cubic meter of stone blasting.
Referring to fig. 1 and fig. 2, the blasting device capable of reducing the stone blasting bulk rate of the deep foundation pit provided in this embodiment includes: multiple rows of blast hole groups 10 and blast units 20.
As shown in fig. 1, the dashed box in fig. 1 identifies a row of groups of blast holes 10, and, for ease of illustration, only one row is shown with four blast holes, and four rows of groups of blast holes 10 are shown. In this embodiment, each of the blast hole groups 10 is disposed in a pre-blasting region, which is a region where a structure to be blasted is located, and more specifically, is disposed on rock in the pre-blasting region, and is disposed in a drilling manner.
In this embodiment, the groups of blastholes 10 are parallel to each other, and each group of blastholes 10 includes a plurality of blastholes 11. In a more preferred embodiment, the number of blastholes 11 in each row of blasthole groups 10 is the same, and the positions correspond to one another.
Each of the blast holes 11 is provided therein with a blasting unit 20, and as shown in fig. 2, the blasting unit 20 includes: the explosive charging device comprises an initiation unit 21 and an explosive charging structure, wherein the explosive charging structure comprises a blocking section 22, a first explosive charging section 23, a spacing section 24 and a second explosive charging section 25 from top to bottom in sequence. Wherein both the first charge segment 23 and the second charge segment 25 are connected to the initiation unit 21. In this embodiment, the first and second charge segments 23, 25 are located in the blast hole-stuffing segment, and the specific loss q of each of the first and second charge segments 23, 25 is 0.38kg/m3-0.42kg/m3. The unit consumption q is set on the basis of the safe allowable value of the blasting vibration speed.
In this embodiment, the spacer 24 is usually made of stemming, a wooden pad, or an air column. The first charge section 23 and the second charge section 25 are filled with explosive and the initiation unit 21 typically employs a detonator.
In practical application, the first charge section 23 and the second charge section 25 are stuffed in the blast hole stuffing section, so that the blasting stress is concentrated, and the generation of the large block rate can be effectively reduced.
In this embodiment, the loaded constitution adopts the mode powder charge of spaced, not only saves the explosive, lets explosive segmentation evenly distributed, increases the effect time of stress wave in the explosion for the bold rate on blasting back rock surface obviously reduces, with the improvement blasting effect.
As shown in tables 1 and 2 below:
TABLE 1
TABLE 2
Wherein, table 1 adopts traditional mode, adopts the blasting device that this application provided in table 2, and every mode all counts the blasting output (m) in 50 blasting3) And the chunk rate produced, the secondary blasting time, and the shipping time. In table 1, the total burst yield is 18090, the average chunk rate is 34.6%, the sum of the secondary crushing time is 83.69h, and the sum of the shipping time is 680.38 h. The secondary crushing equipment calculates according to 8000 yuan/table, the total cost of the secondary crushing is 83690 yuan, and the time length cost of the secondary crushing is converted into 4.36 yuan/m3The shipping efficiency is 26.6m3H is used as the reference value. In Table 2, the total burst output was 24160, the average chunk rate was 12.6%, the sum of the secondary crushing time was 39.22 hours, and the sum of the shipping time was 820.69 hours. The secondary crushing equipment is calculated according to 8000 yuan per equipment, the total cost of the secondary crushing is 39220 yuan, and the cost of the time length of the secondary crushing is 1.6 yuan/m3Shipment efficiency of 29.4m3/h。
Obviously, adopt the blast apparatus that this application provided, not only can reduce the production of big piece rate, can also reduce long when the secondary crushing, improve shipment efficiency to improve whole efficiency of construction. In the embodiment, the minimum resistance line W of the blast hole is 0.8-1.1 m, and compared with the conventional design scheme, the minimum resistance line is increased, so that the protection is moved forward in the direction of the resistance line, the expansion is realized, the stone is effectively blasted, and the generation of the large block rate is reduced.
In this embodiment, the hole distance a between two adjacent blast holes 11 in the blast hole group 10 is 1.0m to 1.3m, and the distance a between two adjacent blast holes 11 is reduced without a threshold. The distance b between two adjacent rows of the blast hole groups 10 is reduced to 0.8m-1.1m, so that the collapse of the blasting pile can be moved forward.
In one embodiment, compared with the prior art, the blasting effect index is increased to 0.65-0.7, and the loose effect of the blasting pile can be achieved.
In this embodiment, the hole depth L of the enlarged blast hole 11 is 3.0m to 4.5m, the length of the plugged section 22 in the charging structure of the blasting unit 20 is reduced to 1.0m to 2.0m, and the length of the spacer section in the charging structure of the blasting unit 20 is reduced to 0.5m to 1.0m, so that there are substantially no or few large lumps in the blast stack,
in some embodiments, the weight of the explosive contained in the first explosive charge section 23 and the second explosive charge section 25 is increased, and if the sum of the weights of the explosive contained in the first explosive charge section 23 and the explosive contained in the second explosive charge section 25 is 2.0-2.5kg, compared with the conventional mode, the explosive height can be increased by 30%, and the generation of the large block rate is obviously reduced.
In conclusion, the blasting device capable of reducing the stone blasting bulk fraction rate of the deep foundation pit provided by the application is used for filling the first explosive loading section and the second explosive loading section in the blasting unit into the blasting hole filling section, and properly increasing unit consumption, so that blasting stress is concentrated, and the production of the bulk fraction rate can be effectively reduced.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (7)
1. The utility model provides a can reduce demolition unit of deep basal pit cubic meter of stone blasting, its characterized in that includes:
the multiple rows of the blasting hole groups are arranged in a pre-blasting area, all the blasting hole groups in the multiple rows of the blasting hole groups are parallel to each other, and each blasting hole group comprises multiple blasting holes;
each blast hole is provided with the blasting unit, the blasting unit includes: the explosive charging structure comprises a detonation unit and an explosive charging structure, wherein the explosive charging structure sequentially comprises a blocking section, a first explosive charging section, a spacing section and a second explosive charging section from top to bottom; the first charge section and the second charge section are both connected with the initiation unit, and the unit consumption q of the first charge section and the second charge section is 0.38kg/m3-0.42kg/m3。
2. The blasting apparatus for reducing the stone blasting bulk rate of the deep foundation pit according to claim 1, wherein the line of least resistance W of the blasthole is 0.8m to 1.1 m.
3. The blasting device capable of reducing the stone blasting bulk fraction of the deep foundation pit according to claim 1, wherein the hole spacing a between two adjacent blastholes in the blasthole groups is 1.0m to 1.3m, and the spacing b between two adjacent rows of the blasthole groups is 0.8m to 1.1 m.
4. The blasting device capable of reducing the stone blasting bulk rate of the deep foundation pit according to claim 1, wherein the hole depth L of the blast hole is 3.0m-4.5 m.
5. The blasting apparatus for decreasing the stone blasting bulk rate of deep foundation pits according to claim 1, wherein the length of the blocking section is 1.0m-2.0 m.
6. The blasting apparatus for decreasing the stone blasting bulk rate of deep foundation pits according to claim 1, wherein the length of the spacing section is 0.5m to 1.0 m.
7. The blasting device capable of reducing the stone blasting bulk rate of the deep foundation pit as claimed in claim 1, wherein the sum of the weights of the explosives loaded in the first explosive charge and the second explosive charge is 2.0-2.5 kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111446282.4A CN114111483A (en) | 2021-11-30 | 2021-11-30 | Can reduce demolition unit of deep basal pit stone square blasting bold rate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111446282.4A CN114111483A (en) | 2021-11-30 | 2021-11-30 | Can reduce demolition unit of deep basal pit stone square blasting bold rate |
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| CN114111483A true CN114111483A (en) | 2022-03-01 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202255143U (en) * | 2011-09-28 | 2012-05-30 | 内蒙古生力中伟爆破集团有限公司 | Spaced loading structure of blasthole |
| CN102506623A (en) * | 2011-11-24 | 2012-06-20 | 兰州大学 | Deep-hole and shallow-hole combined bench blasting method capable of reducing blasting boulder rate |
| CN103868426A (en) * | 2012-12-18 | 2014-06-18 | 浙江公铁爆破工程有限公司 | Method for blasting by adopting spaced loading technology |
| 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 |
| CN107957222A (en) * | 2017-11-28 | 2018-04-24 | 武汉大学 | Reduce blasthole spaced loading and the method for ignition of methods of blasting toes in open generation rate |
| 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 |
| CN110514078A (en) * | 2019-09-04 | 2019-11-29 | 马继恩 | Outdoor water pressure blasting structure and construction technology |
-
2021
- 2021-11-30 CN CN202111446282.4A patent/CN114111483A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202255143U (en) * | 2011-09-28 | 2012-05-30 | 内蒙古生力中伟爆破集团有限公司 | Spaced loading structure of blasthole |
| CN102506623A (en) * | 2011-11-24 | 2012-06-20 | 兰州大学 | Deep-hole and shallow-hole combined bench blasting method capable of reducing blasting boulder rate |
| CN103868426A (en) * | 2012-12-18 | 2014-06-18 | 浙江公铁爆破工程有限公司 | Method for blasting by adopting spaced loading technology |
| 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 |
| CN107957222A (en) * | 2017-11-28 | 2018-04-24 | 武汉大学 | Reduce blasthole spaced loading and the method for ignition of methods of blasting toes in open generation rate |
| 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 |
| CN110514078A (en) * | 2019-09-04 | 2019-11-29 | 马继恩 | Outdoor water pressure blasting structure and construction technology |
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Application publication date: 20220301 |