JP2003238283A - Granular explosive composition - Google Patents
Granular explosive compositionInfo
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- JP2003238283A JP2003238283A JP2002039909A JP2002039909A JP2003238283A JP 2003238283 A JP2003238283 A JP 2003238283A JP 2002039909 A JP2002039909 A JP 2002039909A JP 2002039909 A JP2002039909 A JP 2002039909A JP 2003238283 A JP2003238283 A JP 2003238283A
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- granular
- explosive composition
- ammonium nitrate
- weight
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、砕石、採掘、トン
ネル掘削などの産業発破に用いられる粒状爆薬組成物に
関するものである。TECHNICAL FIELD The present invention relates to a granular explosive composition used for industrial blasting such as crushed stone, mining, tunnel excavation and the like.
【０００２】[0002]
【従来の技術】粒状硝安を主成分とする粒状爆薬組成物
として、例えば硝安油剤爆薬（以下ＡＮＦＯと略記）が
ある。ＡＮＦＯは、多くは多孔質の粒状硝安と軽油から
なる比較的簡便な爆薬であり、比較的容易に製造できる
こと、また流動性に優れているため発破孔へ直接流し込
み装薬が可能であること、ＡＮＦＯローダーによる装填
が可能であること、さらに衝撃感度が比較的低く安全で
あること、安価であること等から広く消費されている。2. Description of the Related Art As a granular explosive composition containing granular ammonium nitrate as a main component, there is, for example, an ammonium nitrate oil explosive (hereinafter abbreviated as ANFO). ANFO is a relatively simple explosive consisting mostly of porous granular ammonium nitrate and light oil, can be manufactured relatively easily, and has excellent fluidity so that it can be directly poured into the blasting hole, It is widely consumed because it can be loaded by an ANFO loader, has a relatively low impact sensitivity, is safe, and is inexpensive.
【０００３】このＡＮＦＯを高威力化する方法として、
吸油率の高い粒状硝安を用いて製造する方法がある。一
般に、吸油率が高いということは硝安内部の空隙の容積
が大きいということである。このような粒状硝安を用い
ることにより、爆薬の反応性が高まり、威力が増大する
ことが知られている。吸油率の高い粒状硝安を用いた場
合、爆薬の反応性が向上すると同時に衝撃感度も増大し
易いという問題があった。例えば、ＡＮＦＯにおいては
日本工業規格Ｋ４８１０に規定されている塩ビ法やカー
トン法において不合格になるという問題があった。As a method of enhancing the power of this ANFO,
There is a method of manufacturing using granular ammonium nitrate having a high oil absorption rate. In general, a high oil absorption rate means that the volume of voids inside ammonium nitrate is large. It is known that the use of such granular ammonium nitrate increases the reactivity of the explosive and increases the power. When granular ammonium nitrate having a high oil absorption rate is used, there is a problem that the reactivity of the explosive is improved and at the same time the impact sensitivity is easily increased. For example, ANFO has a problem that it fails the PVC method and the carton method defined in Japanese Industrial Standard K4810.
【０００４】一方、粒状硝安やＡＮＦＯ粒子はしばしば
崩れ易く、粉化し易い。爆薬製造時やＡＮＦＯローダー
での装薬時等に粉化率が高いと、取扱性、作業環境に支
障を来たし易い。また、粉化率が高いと嵩比重が増大す
るため、発破孔への装薬量が増加するという問題があ
る。On the other hand, granular ammonium nitrate and ANFO particles are liable to collapse and powder. If the powdering rate is high at the time of manufacturing explosives or charging with ANFO loader, the handling and working environment will be easily affected. Further, when the pulverization rate is high, the bulk specific gravity is increased, so that there is a problem that the amount of charge to the blast hole is increased.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、前記の問題
を解決し、高威力かつ低感度で、ＡＮＦＯローダーで排
出した際でも粉化率が６％以下である粒状爆薬組成物を
提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention solves the above problems and provides a granular explosive composition having high power and low sensitivity, and having a pulverization rate of 6% or less even when discharged by an ANFO loader. The purpose is to
【０００６】[0006]
【課題を解決するための手段】本発明者は、前記課題を
解決するために鋭意研究を行った結果、粒状硝安を含む
粒状爆薬組成物において、（１）吸油率と硬度を調節し
た粒状硝安を使用すれば威力が向上し、かつ粉化が生じ
難くなる。（２）平均粒径の小さい粒状硝安を使用する
と威力が向上する。（３）爆薬１００ｇ当たりの酸素バ
ランスを調整すると感度を低下させることができること
を見出し、本発明を完成するに至った。Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that in a granular explosive composition containing granular ammonium nitrate, (1) granular ammonium nitrate whose oil absorption and hardness are adjusted. If used, the power will be improved and powdering will be less likely to occur. (2) Use of granular ammonium nitrate having a small average particle size improves the power. (3) It was found that the sensitivity can be lowered by adjusting the oxygen balance per 100 g of explosive, and the present invention has been completed.
【０００７】すなわち本発明の態様は、次の通りであ
る。
（１） 吸油率が１８〜２３％であり、硬度が５．２〜
８．８の粒状硝安を含む粒状爆薬組成物。
（２） 吸油率が１８〜２３％の粒状硝安を含み、硬度
が２〜１１である粒状爆薬組成物。
（３） 粒状硝安又は粒状爆薬組成物の平均粒径が０．
８〜２．５ｍｍである上記（１）又は（２）に記載の粒
状爆薬組成物。
（４） 油剤を含んでなる上記（１）〜（３）のいずれ
かに記載の粒状爆薬組成物。That is, the aspects of the present invention are as follows. (1) Oil absorption is 18-23% and hardness is 5.2-
A granular explosive composition comprising granular ammonium nitrate of 8.8. (2) A granular explosive composition containing granular ammonium nitrate having an oil absorption rate of 18 to 23% and a hardness of 2 to 11. (3) The average particle size of the granular ammonium nitrate or granular explosive composition is 0.
The granular explosive composition according to (1) or (2) above, which has a size of 8 to 2.5 mm. (4) The granular explosive composition according to any one of (1) to (3) above, which comprises an oil agent.
【０００８】（５） 硝安油剤爆薬である上記（１）〜
（４）のいずれかに記載の粒状爆薬組成物。
（６） 爆薬１００ｇ当たりの酸素バランス値が０〜―
１１ｇである上記（１）〜（５）のいずれかに記載の粒
状爆薬組成物。
（７） 無機低比重物質を添加した上記（１）〜（６）
のいずれかに記載の粒状爆薬組成物。
（８） グアガムかつ／またはローカストビーンガムを
添加した上記（１）〜（７）のいずれかに記載の粒状爆
薬組成物。
以下、本発明について更に詳細に説明する。本発明にお
いて粒状硝安の吸油率とは、粒状硝安をガラスフィルタ
ーに入れて２号軽油を加えた時の粒状硝安に吸着した軽
油の外割重量％のことである。詳しくは、予め重量を測
っておいた直径４０ｍｍφ、内容量６０ｃｃのブフナー
ロート型ガラスフィルターにフィルター板上面から４０
ｍｍの高さまで粒状硝安を入れて全体重量をはかる。(5) The above (1), which is an ammonium nitrate oil explosive,
The granular explosive composition according to any one of (4). (6) Oxygen balance value per 100g of explosive is 0-
The granular explosive composition according to any one of (1) to (5), which is 11 g. (7) The above (1) to (6) in which an inorganic low specific gravity substance is added
The granular explosive composition according to any one of 1. (8) The granular explosive composition according to any one of (1) to (7) above, to which guar gum and / or locust bean gum is added. Hereinafter, the present invention will be described in more detail. In the present invention, the oil absorption rate of granular ammonium nitrate is the outer weight% of the diesel oil adsorbed on the granular ammonium nitrate when the granular ammonium nitrate is put in a glass filter and No. 2 diesel oil is added. Specifically, a Buchner-Rot type glass filter having a diameter of 40 mmφ and an internal capacity of 60 cc, which has been weighed in advance, is placed on the filter plate from the upper surface to 40 mm.
Add granular sodium nitrate to a height of mm and measure the total weight.
【０００９】次いで、ガラスフィルターの先にピンチコ
ックで穴を塞いだゴム管を装着し、粒状硝安が完全に沈
むまで２号軽油を加えて５分間放置する。放置後、ゴム
管を外して２号軽油を２分間自然落下させ、真空ポンプ
をつないで５分間吸引する。吸引終了後、真空ポンプか
ら取り外して全体重量を測り、次に示す式より吸油率
（外割重量％）を算出する。
吸油率＝（Ｗ2−（Ｗ1−Ｗ0）−Ｗ0−０．１）／（Ｗ1
−Ｗ0）×１００
この式におけるＷ0はガラスフィルターの重量（ｇ）、
Ｗ1は粒状硝安を入れた時の全体重量（ｇ）、Ｗ2は真空
ポンプ吸引後に測った全体重量（ｇ）であり、０．１は
ガラスフィルターの壁面に付着する２号軽油の補正値で
ある。粒状硝安のより望ましい吸油率は１８．２〜２
０．８％である。更に好ましくは１８．５〜１９．８％
である。Next, a rubber tube, the hole of which was closed with a pinch cock, was attached to the tip of the glass filter, No. 2 light oil was added until the granular ammonium nitrate completely set, and the mixture was left for 5 minutes. After standing, remove the rubber tube, let the No. 2 diesel oil fall naturally for 2 minutes, connect a vacuum pump and suck for 5 minutes. After completion of suction, remove from the vacuum pump, measure the total weight, and calculate the oil absorption rate (outer weight%) from the following formula. Oil absorption rate = (W 2 - (W 1 -W 0) -W 0 -0.1) / (W 1
-W 0 ) × 100 W 0 in this formula is the weight (g) of the glass filter,
W 1 is the total weight (g) when granular sodium nitrate was added, W 2 is the total weight (g) measured after the vacuum pump suctioned, and 0.1 is the correction value for No. 2 diesel fuel adhering to the wall of the glass filter. Is. More desirable oil absorption of granular ammonium nitrate is 18.2 to 2
0.8%. More preferably 18.5 to 19.8%
Is.
【００１０】本発明において粒状硝安又は粒状爆薬組成
物の硬度とは、一定量の試料を硬度測定装置で機械的に
圧潰し、篩い分けした時の篩を通った重量％の数値のこ
とである。詳しくは、測定装置として直径２００ｍｍφ
の電気モーターによって０．５／秒の速度で回転するス
テンレス製の受け皿と直径１９０ｍｍφの回転しないス
テンレス製の挽き皿（重量１，７１５ｇ）を用いる。ま
ず、目開き１．４０ｍｍと１．００ｍｍの篩を用いて試
料を篩い分ける。篩は目開きが小さな方を下にして重
ね、試料を入れて振とう機で５分間振とうする。次い
で、目開き１．００ｍｍの篩に残る試料から５０ｇ秤量
して硬度測定装置の受け皿に均一に広げ、その上に挽き
皿を重ねて受け皿を１０秒間回転後、受け皿上の試料を
目開き１．００ｍｍの篩に入れ、振とう機を使用して１
分間振盪させる。篩を通過した試料を秤量し、元の試料
５０ｇに対する圧潰量（ｇ）の比率（％）の数値を硬度
とする。計算式は、硬度（％）＝圧潰量（ｇ）／試料５
０ｇ×１００である。In the present invention, the hardness of the granular ammonium nitrate or the explosive composition is the numerical value of the weight% of the sample which is mechanically crushed by a hardness measuring device and sieved. . Specifically, the measuring device has a diameter of 200 mmφ.
The stainless steel pan that rotates at a speed of 0.5 / sec and the non-rotating stainless steel grinding plate (weight: 1,715 g) with a diameter of 190 mmφ are used by the electric motor of FIG. First, the sample is sieved using a sieve having openings of 1.40 mm and 1.00 mm. The sieves are piled up with the one with the smaller opening facing downward, and the sample is put and shaken for 5 minutes on a shaker. Then, 50 g of the sample remaining on the sieve with a mesh opening of 1.00 mm is weighed and spread evenly on the pan of the hardness measuring device, a grinding pan is placed on the pan, and the pan is rotated for 10 seconds. Put in a 0.000 mm sieve and use a shaker to 1
Shake for minutes. The sample passed through the sieve is weighed, and the numerical value of the ratio (%) of the crush amount (g) to the original sample of 50 g is defined as the hardness. The calculation formula is hardness (%) = crush amount (g) / sample 5
It is 0 g × 100.
【００１１】粒状硝安の硬度は、５．５〜８．４である
ことが更に好ましい。粒状硝安の硬度として、６．６、
７．５等は好ましい例である。粒状爆薬組成物の硬度
は、５．２〜８．８であることが更に好ましく、５．５
〜８．４であることが更に好ましい。粒状爆薬組成物の
硬度としても、６．６、７．５等は好ましい例である。
本発明において粒状硝安又は粒状爆薬組成物の平均粒径
とは、メディアン径（５０％粒径）のことである。詳し
くは、目開き４．００ｍｍ、３．３５ｍｍ、２．８０ｍ
ｍ、２．３６ｍｍ、１．７０ｍｍ、１．１８ｍｍ、０．
８５ｍｍ、０．４２５ｍｍの篩で試料１００ｇを篩い分
けて、各篩に残った試料重量から累積粒度分布曲線を作
成し、累積重量が試料全重量の５０％となる粒径のこと
である。なお、篩は目開きの小さいものから順に重ねて
試料を入れ、振とう機を使用して５分間振とうする。The hardness of the granular ammonium nitrate is more preferably 5.5 to 8.4. The hardness of granular ammonium nitrate is 6.6,
7.5 is a preferred example. The hardness of the granular explosive composition is more preferably 5.2 to 8.8, and 5.5 is more preferable.
It is more preferable that it is ˜8.4. Also for the hardness of the granular explosive composition, 6.6, 7.5 and the like are preferable examples.
In the present invention, the average particle size of granular ammonium nitrate or granular explosive composition is the median size (50% particle size). Specifically, the opening is 4.00mm, 3.35mm, 2.80m.
m, 2.36 mm, 1.70 mm, 1.18 mm, 0.
100 g of a sample is sieved with a sieve of 85 mm and 0.425 mm, a cumulative particle size distribution curve is created from the weight of the sample remaining on each screen, and the cumulative weight is a particle size of 50% of the total weight of the sample. It should be noted that the sieves are stacked in order from the one with the smallest opening, and the samples are put therein, and shaken for 5 minutes using a shaker.
【００１２】硝安粒子又は粒状爆薬組成物の平均粒径
は、小さくなる程威力が向上する傾向がある。これは、
粒子間の空隙が小さくなり、爆轟反応中のエネルギー伝
播効率が向上するためと考えられる。硝安粒子又は粒状
爆薬組成物の平均粒径は、１〜２ｍｍであることが更に
望ましい。The smaller the mean particle size of the ammonium nitrate particles or the granular explosive composition, the more the power tends to improve. this is,
It is thought that this is because the voids between the particles become smaller and the energy transmission efficiency during the detonation reaction improves. The average particle size of the ammonium nitrate particles or the granular explosive composition is more preferably 1 to 2 mm.
【００１３】本発明の粒状爆薬組成物に用いられる燃料
としては、液状の油剤が望ましい。液状の油剤を用いる
と、油剤が硝安内部まで含浸し易いため、固体の燃料を
用いるよりも粒状硝安との混合性が良くなり、反応性が
高くなるためである。粒状硝安と引火点５０℃以上の軽
油を混合し、起爆感度と爆轟速度の条件を満たせば硝安
油剤爆薬として扱われる。液状の油剤としては、軽油、
灯油、重油、スピンドル油、パラフィンオイル等の鉱物
油や植物油等が使用できるが、低粘度で硝安内部に含浸
し易く、安価である軽油が好ましい。A liquid oil agent is desirable as the fuel used in the granular explosive composition of the present invention. This is because when a liquid oil agent is used, the oil agent easily impregnates the inside of ammonium nitrate, so that it has better mixability with granular ammonium nitrate and higher reactivity than when a solid fuel is used. If granular sodium nitrate and light oil with a flash point of 50 ° C or higher are mixed and the conditions of detonation sensitivity and detonation speed are satisfied, it is treated as an ammonium nitrate oil explosive. As a liquid oil agent, light oil,
Mineral oils such as kerosene, heavy oil, spindle oil and paraffin oil, vegetable oils and the like can be used, but light oil which has a low viscosity and is easily impregnated into ammonium nitrate and is inexpensive is preferable.
【００１４】爆薬の酸素バランス値（酸素平衡値）と
は、例えば、平成１１年に日本火薬工業会資料編集部に
より刊行された「一般火薬学」第９〜１２頁に述べられ
ているように、１００ｇの爆薬に含まれている可燃性成
分が完全燃焼するための酸素の過不足量を表した数値
（ｇ）のことである。爆薬１００ｇ当たりの酸素バラン
ス値が負になると感度が低下するが、―１１ｇより負に
なると威力も低下してしまう場合がある。爆薬１００ｇ
当たりの酸素平衡値は、より望ましくは―３．６〜―１
０ｇであり、更に望ましくは―５．６〜―８．８ｇであ
る。―６．４ｇ、−７．２ｇ、−８．０ｇ等は好ましい
例である。The oxygen balance value (oxygen balance value) of explosives is, for example, as described in "General Explosives", pages 9 to 12, published by the Japan Explosives Industry Association Material Editing Department in 1999. , 100 g is a numerical value (g) representing the excess and deficiency of oxygen for the complete combustion of the combustible component contained in 100 g of explosive. If the oxygen balance value per 100 g of explosive becomes negative, the sensitivity decreases, but if it becomes negative than -11 g, the power may also decrease. 100g explosive
More preferably, the oxygen equilibrium value per unit is -3.6 to -1.
It is 0 g, and more preferably -5.6 to -8.8 g. -6.4 g, -7.2 g, -8.0 g, etc. are preferable examples.
【００１５】本発明の粒状爆薬組成物には、爆薬の低比
重化のために低比重固体物質を添加することができる。
低比重固体物質としては、発泡スチロールなどの有機低
比重物質、パーライト、シラスバルーン、バーミキュラ
イト、アタパルジャイトなどの無機低比重物質がある。
これらの一種類以上を添加すると良い。無機低比重物質
は、安価で入手しやすく、貯蔵時に爆薬成分と反応する
ことがほとんどないので経時安定性に優れている。シラ
スバルーン、アタパルジャイトは硬度が高く優れてい
る。無機低比重物質の嵩比重は、０．１〜０．６５のも
のが良く、更に０．２〜０．６のものが良い。添加量は
０を超えて３５未満重量％が良く、更に５〜３０重量％
が良い。A solid material having a low specific gravity can be added to the granular explosive composition of the present invention in order to reduce the specific gravity of the explosive.
As the low specific gravity solid substance, there are organic low specific gravity substances such as styrofoam and inorganic low specific gravity substances such as perlite, shirasu balloon, vermiculite and attapulgite.
It is advisable to add one or more of these. Inorganic low specific gravity substances are inexpensive, readily available, and have little reactivity with explosive components during storage, and thus have excellent stability over time. Shirasu balloon and attapulgite have high hardness and are excellent. The bulk specific gravity of the inorganic low specific gravity substance is preferably 0.1 to 0.65, more preferably 0.2 to 0.6. The addition amount is preferably more than 0 and less than 35% by weight, and further 5 to 30% by weight.
Is good.
【００１６】本発明の粒状爆薬組成物には、耐水性を付
与するため増粘剤を添加してよい。増粘剤は、グアガム
や冷水可溶型のローカストビーンガムが良く、特にグア
ガムが安価で良い。増粘剤粒子の粒径は、１００ミクロ
ン以下のものが良く、０．２重量％水溶液の２０℃にお
ける粘度は２０ｍＰａ・ｓ以上のものが良い。粒状爆薬
組成物への添加量は０を超えて１２未満％が良く、更に
２〜１０％が良い。本発明の粒状爆薬組成物には、耐ブ
ロッキング剤、及び流動性向上剤として炭酸カルシウ
ム、シリカ、タルク、カーボンブラック、またはグラフ
ァイト、金属酸化物等を添加してよい。A thickener may be added to the granular explosive composition of the present invention to impart water resistance. As the thickener, guar gum or cold water-soluble locust bean gum is preferable, and guar gum is particularly preferable because it is inexpensive. The particle size of the thickener particles is preferably 100 μm or less, and the viscosity of a 0.2 wt% aqueous solution at 20 ° C. is preferably 20 mPa · s or more. The amount added to the granular explosive composition is preferably more than 0 and less than 12%, more preferably 2 to 10%. To the granular explosive composition of the present invention, calcium carbonate, silica, talc, carbon black, graphite, metal oxide or the like may be added as a blocking resistance agent and a fluidity improver.
【００１７】[0017]
【発明の実施の形態】以下、本発明について実施例を用
いて説明する。本発明は、これらの具体的例によって技
術的範囲を限定されるものではない。表１は、以下の実
施例と比較例について実験条件と実験結果を比較してま
とめたものである。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to examples. The present invention is not limited to the technical scope by these specific examples. Table 1 is a summary of experimental conditions and experimental results for the following examples and comparative examples.
【００１８】[0018]
【実施例１】粒状硝安９２．８重量％と２号軽油７．２
重量％を均一に混合し、この粒状爆薬組成物について後
述の試験法により評価を行った。Example 1 Granular ammonium nitrate 92.8% by weight and No. 2 diesel oil 7.2
% By weight were uniformly mixed, and this granular explosive composition was evaluated by the test method described below.
【００１９】[0019]
【実施例２】粒状硝安９２．８重量％と２号軽油７．２
重量％を均一に混合し、この粒状爆薬組成物について後
述の試験法により評価を行った。Example 2 Granular ammonium nitrate 92.8% by weight and No. 2 light oil 7.2
% By weight were uniformly mixed, and this granular explosive composition was evaluated by the test method described below.
【００２０】[0020]
【実施例３】粒状硝安８３．７重量％と２号軽油５．３
重量％を均一に混合後、シラスバルーン（粒径０．８５
〜１．４ｍｍ、嵩比重０．２３）を１１．０重量％添加
し、均一に分散するまで混合した。この粒状爆薬組成物
について後述の試験法により評価を行った。Example 3 83.7 wt% granular ammonium nitrate and 5.3 light oil No. 2
After uniformly blending the weight%, a shirasu balloon (particle size 0.85
˜1.4 mm, bulk specific gravity 0.23) was added in an amount of 11.0% by weight and mixed until uniformly dispersed. This granular explosive composition was evaluated by the test method described below.
【００２１】[0021]
【実施例４】粒状硝安７２．３重量％と２号軽油４．６
重量％を均一に混合後、アタパルジャイト（粒径０．５
〜１．００ｍｍ、嵩比重０．４７）を２３．１重量％添
加し、均一に分散するまで混合した。この爆薬組成物に
ついて後述の試験法により評価を行った。[Example 4] Granular ammonium nitrate 72.3% by weight and No. 2 gas oil 4.6
After uniformly mixing the weight%, attapulgite (particle size 0.5
.About.1.00 mm, bulk specific gravity 0.47) was added in an amount of 23.1% by weight and mixed until uniformly dispersed. The explosive composition was evaluated by the test method described below.
【００２２】[0022]
【実施例５】粒状硝安９０．５重量％とグアガム（メイ
ホール社製メイプログアーＣＳＡ２００／５０）６重量
％を均一に混合した後、２号軽油３．５重量％を添加
し、均一に分散するまで混合した。この粒状爆薬組成物
について後述の試験法により評価を行った。[Example 5] 90.5% by weight of granular ammonium nitrate and 6% by weight of guar gum (Mayeproguar CSA200 / 50 manufactured by Mayhol Co., Ltd.) were uniformly mixed, and then 3.5% by weight of No. 2 light oil was added to the mixture until uniformly dispersed Mixed. This granular explosive composition was evaluated by the test method described below.
【００２３】[0023]
【比較例１】実施例１、実施例２とは吸油率及び硬度の
異なる粒状硝安９２．８重量％と２号軽油７．２重量％
を均一に混合した。この粒状爆薬組成物について後述の
試験法により評価を行った。[Comparative Example 1] 92.8% by weight of granular ammonium nitrate and 7.2% by weight of No. 2 diesel oil having different oil absorption and hardness from those of Examples 1 and 2.
Were mixed uniformly. This granular explosive composition was evaluated by the test method described below.
【００２４】[0024]
【比較例２】実施例１、実施例２とは吸油率又は硬度の
異なる粒状硝安９２．８重量％と２号軽油７．２重量％
を均一に混合した。この粒状爆薬組成物について後述の
試験法により評価を行った。[Comparative Example 2] 92.8% by weight of granular ammonium nitrate and 7.2% by weight of light oil No. 2 having different oil absorption rates or hardnesses from those of Examples 1 and 2.
Were mixed uniformly. This granular explosive composition was evaluated by the test method described below.
【００２５】[0025]
【比較例３】実施例１、実施例２とは吸油率及び硬度の
異なる粒状硝安９２．８重量％と２号軽油７．２重量％
を均一に混合した。この粒状爆薬組成物について後述の
試験法により評価を行った。[Comparative Example 3] 92.8% by weight of granular ammonium nitrate and 7.2% by weight of No. 2 diesel oil having different oil absorption and hardness from those of Examples 1 and 2.
Were mixed uniformly. This granular explosive composition was evaluated by the test method described below.
【００２６】[0026]
【爆轟速度測定】爆轟速度の測定は、ＪＩＳのＫ４８１
０の火薬類性能試験法に規定されている爆速試験、光フ
ァイバー法に従った。ブースターとして２号榎ダイナマ
イト３０ｇを使用した。[Measurement of detonation speed] K481 of JIS is used for measurement of detonation speed.
The explosive speed test and optical fiber method stipulated in No. 0 explosives performance test method were followed. As a booster, No. 2 Enoki Dynamite 30g was used.
【００２７】[0027]
【起爆感度試験】起爆感度の測定は、ＪＩＳのＫ４８１
０の火薬類性能試験法に規定されている硝安油剤爆薬の
起爆感度試験方法Ａ（塩ビ法）に従い、６号電気雷管で
起爆した。[Detonation sensitivity test] The detonation sensitivity is measured by JIS K481.
In accordance with the detonation sensitivity test method A (PVC method) of an ammonium nitrate oil explosive specified in the No. 0 explosives performance test method, a No. 6 electric detonator was used for detonation.
【００２８】[0028]
【粉化率測定試験】粉化率とは、試料ＡＮＦＯをＡＮＦ
Ｏローダーで排出したときに粉化した量から求めたもの
である。詳しくは、まず粒状爆薬組成物を目開き０．８
５ｍｍの篩に入れ、振とう機を用いて１分間振とうさせ
て篩上に残ったものを試験用試料とした。この試料１０
ｋｇを加圧式ＡＮＦＯローダー（旭化成株式会社製ＡＬ
―２５０）のタンクに仕込み、エアコンプレッサーによ
りタンク内圧を２．５ｋｇ／ｃｍ2にした後、内径１９
ｍｍ、外径２５ｍｍ、長さ３０ｍのホースからＡＮＦＯ
用重袋に全て排出した。次いで、排出した試料を少量ず
つ目開き０．８５ｍｍの篩に入れて振とう機で１分間振
とうさせ、すべて篩分けた。[Powdering rate measurement test] What is the powdering rate?
It is obtained from the amount of powder when discharged by the O loader. For details, first open the granular explosive composition 0.8
The test sample was placed in a 5 mm sieve and shaken for 1 minute using a shaker to leave a residue on the sieve. This sample 10
Pressurized ANFO loader (kg by Asahi Kasei Corporation AL
-250) tank, and after adjusting the tank internal pressure to 2.5 kg / cm 2 with an air compressor,
mm, outer diameter 25 mm, length 30 m hose to ANFO
It was all discharged into a heavy bag. Then, the discharged sample was put little by little into a sieve having an opening of 0.85 mm and shaken by a shaker for 1 minute, and all were sieved.
【００２９】篩を通過した試料の重量を測定し、粉化率
（重量％）＝Ｗ1／Ｗ0×１００により粉化率を算出し
た。この式において、Ｗ0はＡＮＦＯローダーのタンク
に仕込んだ試料重量（１０ｋｇ）、Ｗ1はＡＮＦＯロー
ダーから排出した試料の０．８５ｍｍ篩を通過した試料
重量である。The weight of the sample that passed through the sieve was measured, and the pulverization rate was calculated according to the pulverization rate (% by weight) = W 1 / W 0 × 100. In this formula, W 0 is the weight of the sample loaded in the tank of the ANFO loader (10 kg), and W 1 is the weight of the sample discharged from the ANFO loader that has passed through the 0.85 mm sieve.
【００３０】[0030]
【表１】 [Table 1]
【００３１】表１より、実施例１、実施例２においては
粉化が生じ難く、威力が高いことが分かる。また、感度
も低く合格した。実施例３、実施例４、実施例５では、
それぞれシラスバルーン、アタパルジャイト、グアガム
の添加によって爆轟速度が低下したが、安価な低比重
化、耐水性の付与は達成された。比較例１、比較例２、
比較例３においては、粉化率が増大したり、爆轟速度が
低下したりした。表１の結果は、数回実験を繰り返し行
っても再現性のある結果であった。表１において粉化率
の大小の傾向は、ＡＮＦＯローダーの排出条件、またロ
ーダーによる排出時のみに限ったものではなく、粒状爆
薬組成物としての製造時等においても同様の傾向が見ら
れた。From Table 1, it can be seen that in Examples 1 and 2, pulverization is unlikely to occur and the power is high. Also, the sensitivity was low and it passed. In Example 3, Example 4, and Example 5,
The detonation rate was reduced by adding Shirasu balloon, attapulgite, and guar gum, respectively, but at low cost, low specific gravity and water resistance were achieved. Comparative Example 1, Comparative Example 2,
In Comparative Example 3, the pulverization rate increased and the detonation speed decreased. The results in Table 1 were reproducible even when the experiment was repeated several times. In Table 1, the tendency of the pulverization rate is not limited to the discharge condition of the ANFO loader and the discharge time by the loader, and the same tendency is observed at the time of manufacturing the granular explosive composition.
【００３２】[0032]
【発明の効果】本発明は、硝安粒子の粉化と感度増加の
問題を解決し、高威力の粒状爆薬組成物を得たものであ
る。INDUSTRIAL APPLICABILITY The present invention solves the problems of pulverization of ammonium nitrate particles and the increase in sensitivity, and provides a granular explosive composition with high power.
Claims (8)
５．２〜８．８の粒状硝安を含む粒状爆薬組成物。1. A granular explosive composition containing granular ammonium nitrate having an oil absorption of 18 to 23% and a hardness of 5.2 to 8.8.
み、硬度が２〜１１である粒状爆薬組成物。2. A granular explosive composition containing granular ammonium nitrate having an oil absorption of 18 to 23% and a hardness of 2 to 11.
が０．８〜２．５ｍｍである請求項１又は２に記載の粒
状爆薬組成物。3. The granular explosive composition according to claim 1, wherein the average particle size of the granular ammonium nitrate or granular explosive composition is 0.8 to 2.5 mm.
かに記載の粒状爆薬組成物。4. The granular explosive composition according to claim 1, which comprises an oil agent.
れかに記載の粒状爆薬組成物。5. The granular explosive composition according to claim 1, which is an ammonium nitrate oil explosive.
０〜―１１ｇである請求項１〜５のいずれかに記載の粒
状爆薬組成物。6. The granular explosive composition according to claim 1, wherein an oxygen balance value per 100 g of explosive is 0 to −11 g.
のいずれかに記載の粒状爆薬組成物。7. An inorganic low specific gravity substance is added to any one of claims 1 to 6.
The granular explosive composition according to any one of 1.
ガムを添加した請求項１〜７のいずれかに記載の粒状爆
薬組成物。8. The granular explosive composition according to claim 1, further comprising guar gum and / or locust bean gum.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002039909A JP3998489B2 (en) | 2002-02-18 | 2002-02-18 | Granular explosive composition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002039909A JP3998489B2 (en) | 2002-02-18 | 2002-02-18 | Granular explosive composition |
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| Publication Number | Publication Date |
|---|---|
| JP2003238283A true JP2003238283A (en) | 2003-08-27 |
| JP3998489B2 JP3998489B2 (en) | 2007-10-24 |
Family
ID=27780796
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006256927A (en) * | 2005-03-18 | 2006-09-28 | Chugoku Kayaku Kk | Ammonium nitrate fuel oil explosive |
| JP2011168458A (en) * | 2010-02-22 | 2011-09-01 | Japan Carlit Co Ltd:The | Explosive composition |
| CN103896695A (en) * | 2012-12-30 | 2014-07-02 | 南京理工大学 | Microporous pelletal ammonium nitrate and preparation method thereof |
-
2002
- 2002-02-18 JP JP2002039909A patent/JP3998489B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006256927A (en) * | 2005-03-18 | 2006-09-28 | Chugoku Kayaku Kk | Ammonium nitrate fuel oil explosive |
| JP4677257B2 (en) * | 2005-03-18 | 2011-04-27 | 中国化薬株式会社 | Sodium nitrate explosive |
| JP2011168458A (en) * | 2010-02-22 | 2011-09-01 | Japan Carlit Co Ltd:The | Explosive composition |
| CN103896695A (en) * | 2012-12-30 | 2014-07-02 | 南京理工大学 | Microporous pelletal ammonium nitrate and preparation method thereof |
| CN103896695B (en) * | 2012-12-30 | 2016-04-20 | 南京理工大学 | Many micropores spherulitic ammonium nitrate and method for making thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3998489B2 (en) | 2007-10-24 |
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