CN110887422A - Method for blasting waste ammunition in narrow place without flying - Google Patents
Method for blasting waste ammunition in narrow place without flying Download PDFInfo
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- CN110887422A CN110887422A CN201910874119.4A CN201910874119A CN110887422A CN 110887422 A CN110887422 A CN 110887422A CN 201910874119 A CN201910874119 A CN 201910874119A CN 110887422 A CN110887422 A CN 110887422A
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- 238000005422 blasting Methods 0.000 title claims abstract description 39
- 239000002699 waste material Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000002360 explosive Substances 0.000 claims abstract description 34
- 239000002689 soil Substances 0.000 claims abstract description 20
- 230000006378 damage Effects 0.000 claims abstract description 18
- 238000013016 damping Methods 0.000 claims description 4
- 238000009933 burial Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000004880 explosion Methods 0.000 abstract description 9
- 238000005474 detonation Methods 0.000 abstract description 4
- 239000003245 coal Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D5/00—Safety arrangements
- F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a method for exploding waste ammunition without flying in a narrow place, which comprises the following steps: (1) according to the radius R of the destruction field and the soil medium of the field, calculating the maximum charge Q of the waste ammunition allowed to be destroyed by the destruction fieldmax；QmaxCalculated by the following formula
(2) Determining the explosive mass Q of an ammunition to be destroyed<Qmax; (3) calculating the buried depth of the ammunition under the ground; according to
(4) Flatly placing the waste ammunition in h + r0In a deep exploding pit, r0The radius of the bomb body is provided with the induced explosion charge and the detonator, and the detonation is carried out after the bomb body is backfilled, so that waste ammunition can be exploded without flying. The method for blasting waste ammunition without flying in a narrow place can calculate the buried depth of the ammunition under the condition of no flying by only determining the ammunition loading and the radius of the blasting placeAnd the surface of the coal mine is not scattered, so that the safety of surrounding personnel and buildings is ensured, and the purpose of destroying is achieved.
Description
Technical Field
The invention relates to a method for blasting waste ammunition without flying in a narrow place, belonging to the field of ammunition destruction.
Background
The explosion method is one of the main methods for destroying waste ammunition at present, has the advantages of high efficiency, convenience, thoroughness and safety, and has the defects that the requirement on the safety distance around the site is too large, and the selection of an explosion destroying site is difficult. In recent years, waste ammunition in Shanghai city cannot meet safety requirements due to the fact that the field cannot meet the safety requirements, and cannot be disposed in time, and great potential safety hazards are caused. The method for safely destroying medium and large waste ammunition in a narrow place is significant.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a method for blasting waste ammunition without flying in a narrow field, the depth of the ammunition buried depth under the condition of no flying can be calculated only by determining the ammunition charge and the radius of the blasting field, the ground surface can not generate flying objects when the ammunition is destroyed by explosion, the safety of surrounding personnel and buildings is ensured, and the destruction purpose is achieved.
The technical scheme is as follows: in order to solve the technical problem, the method for exploding the waste ammunition without flying in a narrow place comprises the following steps:
(1) according to the radius R of the destruction field and the soil medium of the field, calculating the maximum charge Q of the waste ammunition allowed to be destroyed by the destruction fieldmax；QmaxCalculated by the following formula
Wherein Qmax-maximum charge (kg) of waste ammunition allowed to be destroyed in the field;
r-minimum radius of field (m);
f is the coupling impact coefficient of the explosive and the soil;
v-surrounding protection target allowable safe vibration speed (m/s);
n is the damping coefficient of the vibration wave of the soil medium;
(2) determining the explosive mass Q < Qmax of the ammunition to be destroyed;
the charge quality of the ammunition to be destroyed can be checked with relevant data, the explosive charge coefficient can be estimated, and the charge amount of the ammunition which the charge amount can not be determined can be calculated according to the total weight of the ammunition body;
(3) calculating the buried depth of the ammunition under the ground; according to
Wherein h is the minimum distance from the center of ammunition destruction to the ground surface, also called the burial depth (m); q is the mass (kg) of explosive of the ammunition to be destroyed; a is the correlation coefficient of the soil medium; b is a blasting degree coefficient;
(4) flatly placing the waste ammunition in h + r0In a deep exploding pit, r0The radius of the bomb body is provided with the induced explosion charge and the detonator, and the detonation is carried out after the bomb body is backfilled, so that waste ammunition can be exploded without flying.
Preferably, the ammunition is loaded according to an explosive loading factor of α, α ═ meM.times.100%, where meThe mass (kg) of the explosive is m, the mass (kg) of the projectile is m, the loading coefficients of the explosives of different types of the projectile are different, the number of the grenades for killing is 5-10, the number of the grenades for killing is 6-16, the number of the grenades for blasting is 10-25, the number of the concrete destruction bombs matched with the large-diameter artillery is 7-18, the number of the blasting bombs is 40-80, the number of the blasting bombs for killing is less than 15, and the number of the armor piercing bombs.
Has the advantages that: the method for blasting the waste ammunition without flying in a narrow field can calculate the depth of the ammunition buried under the condition of no flying by only determining the ammunition loading quantity and the radius of the blasting field, so that the surface can not generate flying objects during blasting and destroying, the safety of surrounding personnel and buildings is ensured, and the purpose of destroying is achieved.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Detailed Description
As shown in fig. 1, the method for safely destroying waste ammunition of the present invention comprises the following steps:
(1) according to the radius R of the destruction field and the soil medium of the field, calculating the maximum charge Q of the waste ammunition allowed to be destroyed by the destruction fieldmax；
Is as follows
Wherein R is the shortest horizontal distance (m) from the center of the blast field to the protection target;
v is the allowable safe vibration speed (cm/s) of a protection target, can be selected according to blasting safety regulations (GB6722-2014), and is 0.5cm/s in consideration of long-term repeated vibration, particularly, the recommendation of houses and facilities with personnel activities is taken;
k is selected according to the table 1;
n is the damping coefficient of the vibration wave of the soil medium and is selected according to the table 1;
TABLE 1 damping characteristics of soil medium vibration wave
f is the coupling impact coefficient of the explosive and the soil, and in the invention, f is 1, and other symbols in the formula have the same meanings as the above.
(2) Determining the explosive mass Q < Qmax of the ammunition to be destroyed;
the charge quality of the ammunition to be destroyed can be checked with relevant data, the explosive charge coefficient can also be estimated, and the charge amount of the ammunition which the charge amount can not be determined can also be calculated according to the total weight of the ammunition body.
The charge of a conventional ammunition is estimated according to the charge factor α of the explosive, α ═ meM.times.100%, where meIs the mass (kg) of explosive and m is the mass (kg) of projectile. The explosive loading coefficients of different types of bullets are different, for example, the killing grenade is 5-10, the killing grenade is 6-16, the blasting grenade is 10-25, the concrete destruction bullet matched with the large-caliber artillery is 7-18, the blasting bomb is 40-80, the killing grenade is less than 15, and the armor piercing bomb is 5-30.
(3) Calculating the buried depth of the ammunition under the ground;
calculated according to the following formula
Wherein A is the correlation coefficient of the soil medium and is selected according to the table 2; the media varies from dry to wet and can be selected between two values.
TABLE 2 correlation coefficient A of soil mass medium
b is the coefficient of the blasting degree, and is 0.6 when the surface is raised and does not scatter; h is the minimum distance from the ammunition destruction center to the ground surface, and the burial depth is not less than h in the actual implementation process; the other symbols in the formula have the same meanings as above.
(4) Destroying operation;
the operation of exploding the waste ammunition without flying underground mainly comprises the following steps:
firstly, excavation blasting pits. The depth of the destruction explosion pit is more than h + r at the middle position of the field0/2(r0Is a projectile body radius), is generally in a cuboid shape, has the length larger than (the length of ammunition to be destroyed is plus 1) meter and the width of about 1 meter, and is provided with a slope road at one end for the convenience of going up and down;
secondly, setting up the projectile body. And flatly placing the ammunition to be destroyed at the bottom of the pit, firmly supporting the pad, and enabling the ammunition tail to face one end of the slope. When a plurality of small and medium ammunitions are destroyed together, the ammunitions can be arranged side by side;
thirdly, setting an explosion-inducing body. The top of the ammunition is provided with an induced explosive and fixed, and when a plurality of ammunitions are destroyed in the pit, the top of each ammunition is provided with an explosive and the explosives are connected into a whole. Each pit adopts more than 2 detonators for multi-point detonation;
fourthly, backfilling. The backfilling adopts an excavated soil body, stone, metal fragments and the like cannot exist in the backfilled soil, the elastomer and the powder charge are backfilled by manpower within 30 cm above the elastomer and the powder charge, the powder charge quality is not influenced, the elastomer and the powder charge can be backfilled by machinery after the backfilling is more than 30 cm, and the backfilling medium is about 50 cm higher than the ground surface. Paying attention to protecting the detonating line in the backfilling process;
fifthly, detonating. The warning distance is larger than the minimum radius of the field, and warning personnel detonate according to the rule after reaching the place;
(5) checking the effect;
video monitoring and blasting vibration monitoring are adopted in the detonation process, and personnel enter a field to check the destruction effect 15 minutes after blasting.
Example 1
One aerobomb with the length of 133cm, the diameter of 24cm and the total weight of 100kg is destroyed in a shooting range in the morning of 13 am, 8 months and 2015. The loading was estimated to be about 80kg of TNT explosive according to the explosive charge, 4kg of TNT explosive blocks were planned to be used for inducing explosion, and the total explosive charge was about 84 kg. The safety range of fragment scattering is about 1200 m according to the conventional blasting method, the blasting field can not meet the blasting requirement, and the bomb is destroyed by adopting an underground non-scattering blasting method.
(1) Selecting a building with a brick-concrete structure at a place of 280 m, and calculating the allowable maximum dosage of about 8903.5kg according to the safe vibration speed of 0.5 cm/s;
(2) 84kg of total explosive quantity for destroying the aerobomb is less than the maximum allowable quantity, and an underground non-flying explosive destroying method can be implemented;
(3) calculating the minimum buried depth, wherein the field is mixed soil with low water content, taking A as 1.0, and calculating to obtain h as 5.19 m;
(4) in the operation implementation, a blast pit is excavated to the depth of 5.5m, a bomb is horizontally placed at the bottom of the pit, the tail of the bomb faces one end of a slope road, 4kg of explosive is arranged above the bomb and fixed, a 2-generation detonator is connected with an initiation circuit in parallel, the excavated soil body is backfilled, a backfilling medium is about 50 cm higher than the ground surface, and initiation is carried out according to the regulation after the warning is in place;
(5) after blasting, the ground surface rises about 0.5 m and then falls back without flying, and the effect is good.
Example 2
10 antitank mines are destroyed in the morning of 13 days in 8 months in 2015, the explosive loading is estimated to be about 52kgTNT, 2kgTNT explosive blocks are planned to be adopted for induced explosion, and the total explosive loading is about 54 kg. The ground for blasting can not meet the requirement of conventional blasting, and the underground non-scattering blasting method is adopted to destroy the land mine.
An inspection workshop is arranged at a site 100 meters, the allowable maximum drug quantity is calculated to be about 358kg according to the safe vibration speed of 0.5cm/s, the total drug quantity for destroying the landmine is 56kg less than the maximum allowable quantity, and the underground non-flying blasting method can be implemented. Calculating the minimum buried depth to 4.22m, excavating a blasting pit with the depth of 4.5m, stacking the landmine double layers at the bottom of the pit, arranging 2kg of induced blasting explosive above the pit and fixing the explosive, connecting 2 power generation detonators in parallel with a blasting circuit, and backfilling and blasting. After blasting, the ground surface rises and falls back without scattering, and the effect is good. The house has weak vibration sense, the vibration speed is less than 0.28cm/s, and the structure is not damaged.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (2)
1. A method for blasting waste ammunition without flying in a narrow place is characterized by comprising the following steps:
(1) according to the radius R of the destruction field and the soil medium of the field, calculating the maximum charge Q of the waste ammunition allowed to be destroyed by the destruction fieldmax；QmaxCalculated by the following formula
Wherein Qmax-maximum charge (kg) of waste ammunition allowed to be destroyed in the field;
r-minimum radius of field (m);
f is the coupling impact coefficient of the explosive and the soil;
v-surrounding protection target allowable safe vibration speed (m/s);
n is the damping coefficient of the vibration wave of the soil medium;
k-coefficient associated with the soil medium;
K. n is obtained by a table
(2) Determining the explosive mass Q < Qmax of the ammunition to be destroyed;
(3) calculating the buried depth h of the ammunition under the ground:
wherein h is the minimum distance from the center of ammunition destruction to the ground surface, also called the burial depth (m); q is the mass (kg) of explosive of the ammunition to be destroyed; a is the correlation coefficient of the soil medium; b is a blasting degree coefficient;
(4) flatly placing the waste ammunition in h + r0In a deep exploding pit, r0Setting explosive charge and detonator for the radius of the bomb body, and detonating after backfilling.
2. A method of non-flying waste ammunition as claimed in claim 1 wherein the ammunition is loaded at a loading factor of α, α ═ meM.times.100%, where meThe mass of explosive is (kg), m is the mass of projectile (kg), the mass of killing grenade is 5-10, the mass of killing grenade is 6-16, the mass of blasting grenade is 10-25, the mass of concrete destruction bomb matched with large-caliber artillery is 7-18, the mass of blasting bomb is 40-80, the mass of killing bomb is less than 15, and the mass of armor piercing bomb is 5-30.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019106118654 | 2019-07-08 | ||
| CN201910611865 | 2019-07-08 |
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| Publication Number | Publication Date |
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| CN110887422A true CN110887422A (en) | 2020-03-17 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1869579A (en) * | 2006-06-21 | 2006-11-29 | 广东宏大***工程有限公司 | System and method of chamber destruction of bomb |
| FR2968029A1 (en) * | 2010-11-30 | 2012-06-01 | France Etat | Method for neutralization of e.g. explosive device, buried underground, involves establishing transfer structure between foundations, digging access tunnel from another access tunnel, where former tunnel is provided partly in structure |
| CN203798264U (en) * | 2013-10-10 | 2014-08-27 | 广东宏大***股份有限公司 | Detonator destroying device |
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2019
- 2019-09-17 CN CN201910874119.4A patent/CN110887422A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1869579A (en) * | 2006-06-21 | 2006-11-29 | 广东宏大***工程有限公司 | System and method of chamber destruction of bomb |
| FR2968029A1 (en) * | 2010-11-30 | 2012-06-01 | France Etat | Method for neutralization of e.g. explosive device, buried underground, involves establishing transfer structure between foundations, digging access tunnel from another access tunnel, where former tunnel is provided partly in structure |
| CN203798264U (en) * | 2013-10-10 | 2014-08-27 | 广东宏大***股份有限公司 | Detonator destroying device |
Non-Patent Citations (2)
| Title |
|---|
| 李泽华，等: "大规模废弃***的安全销毁试验研究", 《***》 * |
| 罗同杰，等: "14万枚***在特定场地销毁的设计与实施", 《工程***》 * |
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Application publication date: 20200317 |