CN108613601B - Demolition blasting explosion test method - Google Patents
Demolition blasting explosion test method Download PDFInfo
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- CN108613601B CN108613601B CN201810381013.6A CN201810381013A CN108613601B CN 108613601 B CN108613601 B CN 108613601B CN 201810381013 A CN201810381013 A CN 201810381013A CN 108613601 B CN108613601 B CN 108613601B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/02—Particular applications of blasting techniques for demolition of tall structures, e.g. chimney stacks
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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
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Abstract
The invention relates to the technical field of demolition blasting construction methods, in particular to a demolition blasting test blasting method. The method comprises the following steps: 1) selecting a member in a building to be blasted as a test blasting member; 2) drilling a plurality of trial blasting holes which do not interfere with each other on the member, and filling explosives with different explosive quantities into different trial blasting holes; 3) simultaneously detonating the explosives in all the pilot blasting holes, observing the member after detonation, and selecting the explosive quantity of the pilot blasting hole with the best blasting effect as the optimal explosive quantity; 4) and carrying out the explosion design work of demolition blasting construction according to the optimal dosage. The explosion testing method is simple and efficient, reduces the explosion testing workload, can obtain more accurate explosion explosive quantity, does not cause burden on explosion safety management work, and has great popularization value.
Description
Technical Field
The invention relates to the technical field of demolition blasting construction methods, in particular to a demolition blasting test blasting method.
Background
The pilot blasting is to perform small-scale experimental blasting on a medium to be blasted before large-scale blasting. In demolition blasting, a few blast holes are usually used for a single component in each type of typical component to calculate the appropriate loading for large-scale blasting. Under a common condition, a member is selected, 3-5 holes are drilled, explosives with consistent weight are put into each air, then the explosives are detonated simultaneously, and whether the explosive quantity of the test explosion condition meets the requirement or not is judged by observing the final explosion condition. The explosion test method can only reflect the explosion condition of one dosage, so the condition of poor explosion test effect may occur. Once the explosion test effect is not good, another explosion test part is selected to carry out explosion test again, and after repeated explosion test, the optimal explosive quantity is determined, so that the explosion dismantling work can be perfectly carried out. Therefore, the existing explosion test method can actually need multiple explosion tests to determine the explosive quantity, the explosion test method undoubtedly increases a lot of workload for the whole explosion work, meanwhile, the ideal effect is difficult to achieve, and the difficulty is brought to the safety management of the explosion demolition work.
Disclosure of Invention
The invention aims to solve the problems that the blasting test method in the prior art mentioned in the background art needs to determine the blasting demolition dosage through repeated blasting tests, the workload is increased, the ideal effect is difficult to achieve, and the safety is poor, and provides the blasting test method for demolition blasting.
The technical scheme of the invention is as follows: a demolition blasting test blasting method is characterized in that: the method comprises the following steps:
1) selecting a member in a building to be blasted as a test blasting member;
2) drilling a plurality of trial blasting holes which do not interfere with each other on the member, and filling explosives with different explosive quantities into different trial blasting holes;
3) simultaneously detonating the explosives in all the pilot blasting holes, observing the member after detonation, and selecting the explosive quantity of the pilot blasting hole with the best blasting effect as the optimal explosive quantity;
4) and carrying out the explosion design work of demolition blasting construction according to the optimal dosage.
In the step 2), the method for drilling a plurality of pilot blast holes which do not interfere with each other on the component comprises the following steps: the explosion testing component is provided with a plurality of explosion testing hole groups, each explosion testing hole group comprises a plurality of explosion testing holes, and the explosion testing hole groups are arranged at equal intervals along the vertical direction from top to bottom.
Each group of the explosion test hole groups further comprises at least two groups of explosion test structures which are arranged at intervals in the vertical direction; the explosion test structure consists of three explosion test holes which are not in a straight line.
The connecting lines of the three test explosion holes in the test explosion structure are arranged in a regular triangle.
Further, the explosive quantities filled in the pilot blasting holes of each group of pilot blasting hole groups are consistent, and the explosive quantities filled in the pilot blasting holes of two adjacent groups of pilot blasting hole groups are inconsistent.
Further, from bottom to top, the explosive amount in the pilot blasting holes of the pilot blasting hole group positioned at the lower part is larger than the explosive amount in the pilot blasting holes of the pilot blasting hole group positioned at the upper part and adjacent to the pilot blasting hole group.
Further, the test explosion component is provided with three test explosion hole groups which are arranged at equal intervals in the vertical direction, the explosive quantity in a first test explosion hole of the test explosion hole group at the lowest part is 1.3-1.5 times that in a second test explosion hole of the test explosion hole group at the middle part, and the explosive quantity in a third test explosion hole of the test explosion hole group at the uppermost part is 0.8-0.9 times that in the second test explosion hole.
Before further test explosion and detonation, the test explosion component is protected and covered, and the strength of the protection and the coverage is designed according to the explosive quantity blasting condition in the second test explosion hole more than two times.
In the step 1), a method for selecting a member in the building to be blasted as a test blasting member comprises the following steps: and selecting a member which does not influence the structural stability of the building after blasting crushing from the building to be blasted as a test blasting member.
Further, the test explosion component is an upright post which cannot influence the structural stability of the building after explosion and breakage.
The invention has the advantages that: 1. according to the invention, the plurality of test explosion holes are arranged on the test explosion component, explosives with different explosive quantities are filled, and the explosion conditions of the explosives with different explosive quantities can be observed by simultaneously exploding, so that the optimal explosive quantity can be obtained, the explosion work can be accurately designed and dismantled according to the explosive quantity, the whole method is simple, the engineering quantity is small, multiple times of explosion are not needed, the obtained result is accurate, no redundant burden is caused to safety management work, and the method has great popularization value.
2. The explosion test hole groups are arranged at intervals in the vertical direction, so that the explosion test holes with different dosages can be distinguished, the explosion test condition is more obvious, and the observation is easy.
3. According to the invention, a plurality of test explosion holes with consistent dosage are arranged in each test explosion hole group, so that the test explosion condition of the same dosage can be verified for many times, the interference of other factors is eliminated, and the test explosion condition is more accurate.
4. According to the invention, the test blasting holes in each group of test blasting structures are distributed in the shape of a regular triangle, so that the blasting range among the test blasting holes can be effectively expanded, the interference and influence among the adjacent test blasting holes are avoided, and the blasting condition of each test blasting hole is reflected more truly.
5. The invention is designed according to the actual building condition by reducing the drug amount from bottom to top, the heights of the components are inconsistent, and the structural strength is different in practice, so that the optimal drug amount can be accurately calculated by controlling the drug amount change.
6. The test blasting method provided by the invention not only can obtain the optimal blasting explosive quantity at one time, but also can calculate the blasting protection coverage condition through the optimal explosive quantity, so that the difficulty and the workload of the whole design work are reduced.
The explosion testing method is simple and efficient, reduces the explosion testing workload, can obtain more accurate explosion explosive quantity, does not cause burden on explosion safety management work, and has great popularization value.
Drawings
FIG. 1: the invention discloses a schematic diagram of arrangement conditions of pilot blasting holes on a stand column.
Wherein: 1-first pilot hole; 2-second trial blast hole; 3-third trial blast hole; 4-upright column.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
In some places, when blasting demolition construction is carried out on an old factory building, the use condition of explosive amount of demolition construction needs to be determined in the initial design work stage, and therefore the explosive amount needs to be determined by trial blasting.
Before the explosion test, a component in a factory building needs to be selected as an explosion test component. The principle of selection is that the structural stability of the plant can not be influenced after the member is exploded and crushed, and the stand column 4 in the plant is selected as an explosion test member according to the structural characteristics of the plant.
As shown in fig. 1, the explosion test holes are drilled in the column 4, and in this embodiment, three explosion test hole groups are drilled in the column 4, the three explosion test hole groups are arranged at equal intervals in the vertical direction, and the interval between adjacent explosion test hole groups is 20 cm. Each group of test explosion hole group comprises two groups of test explosion structures which are arranged at equal intervals along the vertical direction, each group of test explosion structure comprises three test explosion holes, the connecting lines of the three test explosion holes are in a regular triangle shape, the bottom edge of the regular triangle is along the horizontal direction, and the vertex angle of the regular triangle is upward.
In this embodiment, the explosive quantities in all the pilot blasting holes in each group of pilot blasting holes are the same, and the explosive quantities in the pilot blasting holes in two adjacent groups of pilot blasting holes are different. The specific arrangement condition is that the explosive amount in the second pilot blasting hole 2 in the pilot blasting hole group in the middle of the upright post 4 is a, the explosive amount in the first pilot blasting hole 1 at the lowest part of the upright post 4 is 1.3-1.5 a, and the explosive amount in the third pilot blasting hole 3 at the highest part of the upright post 4 is 0.8-0.9 a. Wherein a is the explosive amount calculated by the constructor according to the structural condition of the upright post 4.
Before the blasting, need protect the cover to stand 4, guarantee constructor's safety, can calculate the protection condition of the whole blasting in later stage through protecting the cover in addition. The strength of protection coverage is designed according to more than twice of the explosive amount in the second pilot blasting holes 2.
The specific explosion test method comprises the following steps:
1) selecting the upright column 4 as an explosion test component of the whole workshop;
2) three groups of test explosion hole groups are drilled on the upright post 4 and are sequentially arranged at equal intervals from top to bottom, wherein the three groups of test explosion hole groups comprise a first group containing six first test explosion holes at the bottom, a second group containing six second test explosion holes at the middle and a third group containing six third test explosion holes at the top, the filling amount of the first test explosion holes 1 is 1.3-1.5 times that of the second test explosion holes 2, and the filling amount of the third test explosion holes 3 is 0.8-0.9 times that of the second test explosion holes 2;
3) before pilot blasting, protecting the stand column 4 by a protection cover which meets the strength of the blasting condition of more than two times of explosive amount in the second pilot blasting hole 2, then simultaneously detonating all pilot blasting holes, observing the blasting condition of the last stand column 4, and selecting the explosive amount in the pilot blasting hole with the best blasting condition as the optimal explosive amount;
4) calculating according to the optimal explosive quantity, adjusting within a small range, and performing explosive quantity design work of demolition blasting and demolition blasting protection coverage design work.
In practical application, the test blasting hole groups are not limited to three groups, and more test blasting hole groups can be additionally arranged if the structure is complex. The distribution of the explosive amount in the three groups of test blasting holes is not limited, and the adjustment can be carried out according to the actual situation.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A demolition blasting test blasting method is characterized in that: the method comprises the following steps:
1) selecting a member in a building to be blasted as a test blasting member;
2) drilling a plurality of trial blasting holes which do not interfere with each other on the member, and filling explosives with different explosive quantities into different trial blasting holes;
3) simultaneously detonating the explosives in all the pilot blasting holes, observing the member after detonation, and selecting the explosive quantity of the pilot blasting hole with the best blasting effect as the optimal explosive quantity;
4) and carrying out the explosion design work of demolition blasting construction according to the optimal dosage.
2. A demolition blasting test blasting method according to claim 1, wherein: in the step 2), the method for drilling a plurality of pilot blasting holes which do not interfere with each other on the component comprises the following steps: the explosion testing component is provided with a plurality of explosion testing hole groups, each explosion testing hole group comprises a plurality of explosion testing holes, and the explosion testing hole groups are arranged at equal intervals along the vertical direction from top to bottom.
3. A demolition blasting test blasting method according to claim 2, wherein: the explosive quantities filled in the test explosion holes of each group of test explosion hole groups are consistent, and the explosive quantities filled in the test explosion holes of two adjacent groups of test explosion hole groups are inconsistent.
4. A demolition blasting test blasting method according to claim 3, wherein: each group of test explosion hole groups comprises at least two groups of test explosion structures which are arranged at intervals in the vertical direction; the explosion test structure consists of three explosion test holes which are not in a straight line.
5. A demolition blasting test blasting method according to claim 4, wherein: the connecting lines of the three explosion test holes in the explosion test structure are arranged in a regular triangle.
6. A demolition blasting test blasting method according to claim 5, wherein: from bottom to top, the explosive amount in the pilot blasting holes of the pilot blasting hole group positioned at the lower part is larger than the explosive amount in the pilot blasting holes of the pilot blasting hole group positioned at the upper part and adjacent to the upper part.
7. A demolition blasting test blasting method according to claim 6, wherein: the explosive testing component is provided with three groups of explosive testing hole groups which are arranged at intervals along the vertical direction at equal intervals, the explosive quantity in a first explosive testing hole (1) of the explosive testing hole group at the lowest part is 1.3-1.5 times that in a second explosive testing hole (2) of the explosive testing hole group at the middle part, and the explosive quantity in a third explosive testing hole (3) of the explosive testing hole group at the uppermost part is 0.8-0.9 times that in the second explosive testing hole (2).
8. A demolition blasting test blasting method according to claim 7, wherein: before the test explosion is detonated, the test explosion component is protected and covered, and the strength of the protection covering is designed according to the explosive quantity blasting condition in the second test explosion hole (2) more than two times.
9. A demolition blasting test blasting method according to claim 1, wherein: in the step 1), the method for selecting a member in the building to be blasted as the test blasting member comprises the following steps: and selecting a member which does not influence the structural stability of the building after blasting crushing from the building to be blasted as a test blasting member.
10. A demolition blasting test blasting method according to claim 9, wherein: the test explosion component is an upright post (4) which can not influence the structural stability of the building after explosion and breakage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810381013.6A CN108613601B (en) | 2018-04-25 | 2018-04-25 | Demolition blasting explosion test method |
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| CN201810381013.6A CN108613601B (en) | 2018-04-25 | 2018-04-25 | Demolition blasting explosion test method |
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| CN108613601A CN108613601A (en) | 2018-10-02 |
| CN108613601B true CN108613601B (en) | 2020-09-04 |
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| CN103557755B (en) * | 2013-11-04 | 2015-09-09 | 中国水电顾问集团华东勘测设计研究院有限公司 | Deep-lying tunnel rockburst control effect evaluation method |
| CN107941104B (en) * | 2017-11-03 | 2018-12-18 | 北京科技大学 | Tunnel slotting explosive load design method based on porous short-delay blasting vibration composite calulation |
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Address after: 430063 No. 745 Heping Avenue, Wuchang, Hubei, Wuhan Patentee after: China Railway Siyuan Group Engineering Construction Co., Ltd Address before: 430063 No. 745 Heping Avenue, Wuchang, Hubei, Wuhan Patentee before: GEOTECHNICAL ENGINEERING CO., LTD. OF CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP Co.,Ltd. |
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