JP2005306626A - Ammonium nitrate-fuel oil explosive and blasting method using the explosive - Google Patents
Ammonium nitrate-fuel oil explosive and blasting method using the explosive Download PDFInfo
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- JP2005306626A JP2005306626A JP2004122225A JP2004122225A JP2005306626A JP 2005306626 A JP2005306626 A JP 2005306626A JP 2004122225 A JP2004122225 A JP 2004122225A JP 2004122225 A JP2004122225 A JP 2004122225A JP 2005306626 A JP2005306626 A JP 2005306626A
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Abstract
Description
本発明は硝安油剤爆薬に関し、より詳しくは、特定の比表面積を有するポーラスプリル硝酸アンモニウムが含有されてなる、爆発威力の高い硝安油剤爆薬に関するものである。 More particularly, the present invention relates to a highly explosive ammonium nitrate explosive containing a porous prill ammonium nitrate having a specific surface area.
従来、ポーラスプリル硝酸アンモニウムと液体燃料の軽油とを混合させてなる爆薬として、硝安油剤爆薬が知られている。該爆薬は、原料が安価で、容易に製造でき、経済性に優れ、かつ起爆感度が低いため、安全な爆薬として広く利用されている。しかしながら、ダイナマイトや含水爆薬に比べ、爆発威力や耐水性に劣るという解決すべき課題を有している。 Conventionally, as an explosive formed by mixing porous prill ammonium nitrate and liquid fuel gas oil, an ammonium nitrate oil explosive is known. The explosive is widely used as a safe explosive because the raw material is inexpensive, can be easily manufactured, is economical, and has low initiation sensitivity. However, compared with dynamite and hydrous explosives, there is a problem to be solved that is inferior in explosion power and water resistance.
近年、硝安油剤爆薬の爆発威力を向上させるため、主に、低比重の硝安油剤爆薬が利用されている。一般的に、低比重硝安油剤爆薬に用いられる硝酸アンモニウムは、粒径１．１８〜１．７０ｍｍのポーラスプリル硝酸アンモニウムを６０質量％以上含有し、かつ全硝酸アンモニウム成分の比表面積が１．００〜１．５０ｍ２／ｇであり、該硝酸アンモニウムを用いることにより、軽油との混合性が良好となり、反応性が向上するため、より爆発威力の高い爆薬を得ることができる。また、特許文献１には、硝酸アンモニウムに微小球を含有させることにより、低比重硝安油剤爆薬を得る方法が提案されている。 In recent years, low specific gravity ammonium nitrate explosives are mainly used in order to improve the explosion power of ammonium nitrate explosives. In general, ammonium nitrate used in low specific gravity ammonium oil explosives contains 60% by mass or more of porous prill ammonium nitrate having a particle size of 1.18 to 1.70 mm, and the specific surface area of all ammonium nitrate components is 1.00 to 1. was 50 m 2 / g, by using the nitric acid ammonium enables good mixing with the gas oil, in order to improve reactivity, it is possible to obtain a higher explosive power explosive. Patent Document 1 proposes a method for obtaining a low specific gravity ammonium nitrate explosive by incorporating microspheres into ammonium nitrate.
ＪＩＳＫ４８０１規格に準拠して、硝安油剤爆薬を、３２Ａ炭素鋼鋼管（内径約３５ｍｍ）に装填し、爆速を測定すると、従来品に比べ、上記低比重硝安油剤爆薬の方が爆速が高く、また、明かり発破においては、低比重硝安油剤爆薬はかさ比重が低いことから、従来品と同重量を装填させた場合で比較すると、装薬長が伸び、発破孔上部の起砕状況が良好となるといった長所を有している。 According to the JISK4801 standard, when the explosive speed is measured by loading the explosives with 32A carbon steel pipe (inner diameter of about 35mm) and measuring the explosive speed, the low specific gravity explosive explosive has a higher explosive speed than the conventional product. In light blasting, the low specific gravity ammonium oil explosive explosive has a low bulk specific gravity, so when compared to the case of loading the same weight as the conventional product, the charge length is increased and the crushed condition at the top of the blast hole is improved. Has advantages.
しかしながら、低比重硝安油剤爆薬は、発破孔が大孔径になる程、先のＪＩＳ規格に準拠した測定値に示されるほどの爆速は得られず、砕石現場などで用いた場合、破砕された岩石中に大塊が残存し、後処理に手間がかかるという解決すべき課題が残されていた。 However, low specific gravity ammonium oil explosive explosives cannot obtain the explosion speed shown in the measurement value based on the previous JIS standard as the blasting hole becomes larger. When used at a crushed stone site, There remains a problem to be solved that large lumps remain in the inside and time-consuming post-processing is required.
本発明の目的は、大孔径の発破孔に装填し、起爆させることにより、高い爆発威力を有する硝安油剤爆薬及び該爆薬を用いた発破方法を提供することである。 An object of the present invention is to provide a sachet explosive explosive having a high explosive power by loading it in a blasting hole having a large pore diameter and detonating it, and a blasting method using the explosive.
本発明者は、鋭意検討を行った結果、特定の平均粒子径及び比表面積を有するポーラスプリル硝酸アンモニウムと、軽油とからなる硝安油剤爆薬が、上記課題を解決し得ることを見いだし、本発明を完成するに至った。 As a result of intensive studies, the present inventor has found that an ammonium nitrate explosive composed of porous prill ammonium nitrate having a specific average particle size and specific surface area and light oil can solve the above-mentioned problems, and has completed the present invention. It came to do.
すなわち、本発明は、ポーラスプリル硝酸アンモニウム及び軽油が含有されてなる硝安油剤爆薬において、ポーラスプリル硝酸アンモニウム成分が、粒径１．１８〜１．７０ｍｍのポーラスプリル硝酸アンモニウムを少なくとも６０質量％含有し、かつ全ポーラスプリル硝酸アンモニウム成分の比表面積が０．５０〜１．００ｍ２／ｇであることを特徴とする硝安油剤爆薬である。 That is, the present invention relates to a ammonium nitrate explosive containing porous prill ammonium nitrate and light oil, wherein the porous prill ammonium nitrate component contains at least 60% by mass of porous prill ammonium nitrate having a particle size of 1.18 to 1.70 mm, and An anti-nitrile explosive characterized in that the specific surface area of the porous prill ammonium nitrate component is 0.50 to 1.00 m 2 / g.
また、本発明は、少なくとも孔径１００ｍｍの発破孔に、上記硝安油剤爆薬を装填して起爆させることを特徴とする硝安油剤爆薬の発破方法である。 The present invention is also a blasting method for a smelting oil explosive characterized in that the blasting hole having a hole diameter of 100 mm is charged with the above-mentioned squeezing oil explosive explosive.
本発明に用いられるポーラスプリル硝酸アンモニウムは、粒径１．１８〜１．７０ｍｍのポーラスプリル硝酸アンモニウムを少なくとも６０質量％含有し、かつ全ポーラスプリル硝酸アンモニウム成分の比表面積が０．５０〜１．００ｍ２／ｇであり、該ポーラスプリル硝酸アンモニウムは、反応性に優れ、軽油との混合性が良好であり、また、該ポーラスプリル硝酸アンモニウムと軽油とが含有されてなる本発明の硝安油剤爆薬は、大孔径の発破孔に装填させて起爆させることにより、高い爆発威力を得ることができる。 The porous prill ammonium nitrate used in the present invention contains at least 60% by mass of porous prill ammonium nitrate having a particle size of 1.18 to 1.70 mm, and the specific surface area of the total porous prill ammonium nitrate component is 0.50 to 1.00 m 2 / g and the porous prill ammonium nitrate has excellent reactivity and good mixing with light oil, and the ammonium nitrate explosive of the present invention containing the porous prill ammonium nitrate and light oil has a large pore diameter. High explosion power can be obtained by loading the blast hole and detonating it.
また、本発明の硝安油剤爆薬を用いた発破方法は、少なくとも孔径１００ｍｍの発破孔に、本発明の硝安油剤爆薬を装填し、起爆させるものであり、本発明の硝安油剤爆薬は、大孔径の発破孔で、高い爆発威力を得ることができる。 Further, the blasting method using the ammonium nitrate explosive of the present invention is to load the blast hole of at least 100 mm in diameter with the ammonium nitrate explosive of the present invention and initiate the explosion, and the ammonium explosive explosive of the present invention has a large pore diameter. High explosion power can be obtained at the blast hole.
本発明の硝安油剤爆薬は、硝酸アンモニウム及び軽油が含有されてなり、本発明に用いられる硝酸アンモニウム成分は、粒径１．１８〜１．７０ｍｍの粒状ポーラスプリル硝酸アンモニウムが少なくとも６０質量％含有されてなり、かつ全硝酸アンモニウム成分の比表面積が０．５０〜１．００ｍ２／ｇの範囲である。 The ammonium nitrate oil explosive of the present invention contains ammonium nitrate and light oil, and the ammonium nitrate component used in the present invention contains at least 60% by mass of granular porous prill ammonium nitrate having a particle size of 1.18 to 1.70 mm. And the specific surface area of all the ammonium nitrate components is the range of 0.50-1.00 m < 2 > / g.
上記範囲に調整された硝酸アンモニウム成分は、軽油との混合性が良好であり、また、該ポーラスプリル硝酸アンモニウムと軽油とが含有されてなる硝安油剤爆薬は、大孔径の発破孔に装填させて起爆させることにより、高い爆発威力を得ることができる。 The ammonium nitrate component adjusted to the above range has good mixing properties with light oil, and the ammonium nitrate explosive containing the porous prill ammonium nitrate and light oil is loaded into a blasting hole with a large pore size for detonation. Therefore, high explosion power can be obtained.
本発明に用いられる軽油は、ＪＩＳＫ４８０１規格に定められているように、引火点が５０℃以上である。 The light oil used in the present invention has a flash point of 50 ° C. or higher as defined in the JIS K4801 standard.
本発明の硝安油剤爆薬は、前記ポーラスプリル硝酸アンモニウムと軽油とを適宜混合させて製造することができ、通常、硝安油剤爆薬中に含有される硝酸アンモニウム成分は、８０〜９７質量％の範囲である。 The ammonium nitrate explosive of the present invention can be produced by appropriately mixing the porous prill ammonium nitrate and light oil. Usually, the ammonium nitrate component contained in the ammonium nitrate explosive is in the range of 80 to 97% by mass.
次に、本発明の硝安油剤爆薬を用いた発破方法について説明する。 Next, the blasting method using the ammonium nitrate explosive of the present invention will be described.
本発明の硝安油剤爆薬を用いた発破方法は、少なくとも孔径１００ｍｍの発破孔に、本発明の硝安油剤爆薬を装填し、起爆させるものである。 In the blasting method using the ammonium nitrate explosive of the present invention, at least a blast hole having a hole diameter of 100 mm is loaded with the ammonium explosive explosive of the present invention to cause an explosion.
一般に、硝安油剤爆薬を用いた国内の発破現場では、通常、孔径６０〜２５０ｍｍの発破孔に、硝安油剤爆薬を装填し、起爆させて砕石されるが、本発明の硝安油剤爆薬は、これらの発破孔の中でも、大孔径の発破孔に装填し、起爆させることにより、爆発威力を増大させることができ、好ましい発破孔の孔径は、少なくとも１００ｍｍであり、より好ましくは１３０ｍｍ以上である。 Generally, at a blasting site in Japan using a smelting explosive explosive, a blasting hole with a hole diameter of 60 to 250 mm is usually loaded with a explosive explosive and crushed by detonation. Among the blasting holes, the explosion power can be increased by loading the blasting hole with a large blasting hole and detonating, and the preferable blasting hole diameter is at least 100 mm, more preferably 130 mm or more.
以下、本発明を実施例に基づいて説明する。なお、実施例中、「％」は質量％を表す。 Hereinafter, the present invention will be described based on examples. In the examples, “%” represents mass%.
実施例
粒径１．１８〜１．７０ｍｍのポーラスプリル硝酸アンモニウムを６０％含有し、かつ比表面積が０．５０〜１．００ｍ２／ｇの範囲に調整されたポーラスプリル硝酸アンモニウム９４％及び２号軽油６％となる配合比で、コンクリートミキサー中、３分間混合させて、硝安油剤爆薬を得た。なお、使用したポーラスプリル硝酸アンモニウムについて、比表面積測定機（米国Ｑｕａｎｔａｃｈｒｏｍｅ社製 ガス吸着装置ＡＵＴＯＳＯＲＢ−１）により表面積を測定した結果、０．７０ｍ２／ｇであった。
Example 94% Porous Prill Ammonium Nitrate containing 60% Porous Prill Ammonium Nitrate with a Particle Size of 1.18 to 1.70 mm and a Specific Surface Area Adjusted to a Range of 0.50 to 1.00 m 2 / g and No. 2 Light Oil The mixture was mixed for 3 minutes in a concrete mixer at a blending ratio of 6% to obtain a salt oil explosive explosive. In addition, it was 0.70 m < 2 > / g as a result of measuring the surface area about the used porous prill ammonium nitrate by the specific surface area measuring machine (USA Gas Quantachrome gas adsorption device AUTOSORB-1).
上記爆薬を、ＪＩＳＫ４８０１規格に基づいて、３２Ａ炭素鋼鋼管（内径φ３５ｍｍ）に装填し、発破させたときの爆速を光ファイバー法で測定した。また、実際の砕石現場において、発破孔（φ１３０ｍｍ）に上記爆薬を装填し、起爆させたときの爆速を抵抗線プローブ法にて測定した。なお、本測定には、Ｉｎｓｔａｎｔｅｌ社製抵抗線プローブ測定機（ＶＯＤ ＭＡＴＥ）を用いた。結果を、表１に示す。 Based on the JISK4801 standard, the explosive was loaded into a 32A carbon steel pipe (inner diameter φ35 mm), and the explosion speed when blasting was measured by the optical fiber method. Further, at an actual crushed stone site, the explosive was loaded into the blast hole (φ130 mm), and the explosion speed when detonated was measured by the resistance wire probe method. In this measurement, a resistance wire probe measuring machine (VOD MATE) manufactured by Instantel was used. The results are shown in Table 1.
比較例
実施例のポーラスプリル硝酸アンモニウムに代えて、比表面積１．２５ｍ２／ｇのポーラスプリル硝酸アンモニウムを用いた以外は、実施例と同様にして、硝安油剤爆薬を得た。
Comparative Example An ammonium nitrate explosive explosive was obtained in the same manner as in the example except that porous prill ammonium nitrate having a specific surface area of 1.25 m 2 / g was used instead of the porous prill ammonium nitrate of the example.
上記爆薬を用いて、実施例と同様にして爆速を測定した。結果を、表１に示す。 Using the above explosive, the explosion speed was measured in the same manner as in the example. The results are shown in Table 1.
表１に示すように、従来のポーラスプリル硝酸アンモニウムを用いて作製した硝安油剤爆薬に比べて、本発明のポーラスプリル硝酸アンモニウムを用いて作製した硝安油剤爆薬は、小孔径の発破孔では爆速が低いものの、大孔径の発破孔では、爆速が高く、高い爆発威力を示すことがわかる。
As shown in Table 1, compared with conventional ammonium nitrate explosives prepared using porous prill ammonium nitrate, the ammonium nitrate explosive produced using the porous prill ammonium nitrate of the present invention has a lower explosive speed in a small-bore blast hole. It can be seen that the blast hole with a large hole diameter has a high explosion speed and a high explosion power.
Claims (2)
A method for blasting an ammonium nitrate explosive, comprising loading at least a blast hole having a hole diameter of 100 mm with the ammonium explosive explosive according to claim 1 and starting the explosion.
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| JP2004122225A JP2005306626A (en) | 2004-04-16 | 2004-04-16 | Ammonium nitrate-fuel oil explosive and blasting method using the explosive |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261652A (en) * | 2009-05-07 | 2010-11-18 | Hitachi Zosen Corp | Cartridge, destruction device and cartridge kit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261652A (en) * | 2009-05-07 | 2010-11-18 | Hitachi Zosen Corp | Cartridge, destruction device and cartridge kit |
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