JP2012021700A - Pyrotechnics - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain great crush power by presenting sufficient stuffing effects even with a little stuffing in pyrotechnics used for blasting.SOLUTION: For pyrotechnics 1, a plurality of explosive pellets 3 each of which is obtained by molding high-performance explosives such as RDX into a pellet shape are packaged in an aluminum pipe 2 and then, an electric detonator 4 and a control device 5 comprised of an electronic device which can control detonation timing of the detonator 4 highly accurately for the unit of 1 ms are packaged. An object 7 to be crushed such as rock or concrete is crushed by loading the pyrotechnics 1 into a punched hole 8 formed on the free surface of the object 7 to be crushed, and then filling it with stuffing 9 such as sand or clay.

Description

  The present invention relates to a pyrotechnic that exerts a filling effect when blasting of an object to be crushed, such as rock or concrete.

  At the time of blasting of crushed objects such as rocks and concrete, the required number of perforations are formed on the free surface of the crushed object, and each explosive is loaded with explosives and electric detonators. Etc. are filled and filled (for example, Patent Documents 1 and 2).

JP 2003-161095 A JP 2009-168374 A

  Filling is performed in order that the high-temperature and high-pressure gas generated when explosives explode in the perforations works effectively and brings about a large crushing effect. However, if the perforations are shallow, a sufficient amount of filling is packed. In addition, if the amount of filling is small even with deep perforation, a sufficient filling effect cannot be achieved.

  An object of the present invention is to provide a pyrotechnic that can sufficiently increase the filling effect even with a small amount of filling and can obtain a large crushing force.

  The pyrotechnic of the invention according to claim 1 is a pyrotechnic used for blasting by being loaded into a perforation formed on a free surface of a material to be crushed, such as rock or concrete, and comprising: And a control device for controlling the detonation timing of the detonator and the detonator loaded in order in the loading direction of the tube body into the perforation.

  The invention according to claim 2 is characterized in that the explosive of the invention according to claim 1 is an explosive pellet formed into a pellet shape.

  When a pyrotechnic article according to the present invention is loaded into a perforation formed on a free surface of a material to be crushed, such as rock or concrete, and then filled with a filling, a control signal is transmitted from a control device, and a detonator is detonated. , Will spread to the tip explosives. Due to the explosion of the explosive, the shock wave and the reaction product gas generated in the perforations are crushed around the perforations and propagated in the direction of the filling on the free surface side. The control device is compressed together with the tubular body by the force generated at this time, plugs the free surface that is not crushed, and exerts a filling effect. Therefore, even if the filling amount is small, the filling effect is sufficiently exhibited, and a large crushing force can be obtained even with a small amount of explosive. In addition, a large crushing force can be obtained with a small amount of explosives, making it possible to reduce the size of pyrotechnics, and reducing the size of pyrotechnics can reduce noise, vibration, dust, etc. generated during blasting. Low environmental impact, low cost, and safe blasting work.

  If explosive pellets molded into pellets are used as the explosive, the packing density can be increased, the explosive energy can be increased, and the dosage can be easily adjusted in grams.

The schematic of the pyrotechnics concerning this invention. Schematic which shows a state when loading the pyrotechnics shown in FIG.

Hereinafter, the pyrotechnic of the present invention will be described with reference to the drawings.
A pyrotechnic 1 shown in FIG. 1 has a constant mass, for example, 1.25 g of explosive pellets, in which a high-performance explosive, such as RDX, HMX, tetril, or PETN, is molded into a metal tube 2, for example, aluminum. 3 is loaded, and then the electric detonator 4 and then an electronic device capable of controlling the detonation timing of the detonator 4 with high accuracy in units of 1 ms, for example, a control device 5 comprising an electronic device manufactured by Kayak Japan Co., in order. It is made. In the figure, 6 is a conducting wire connected to the control device 5.

  FIG. 2 shows that the pyrotechnics 1 are respectively loaded into perforations 8 formed at appropriate intervals on a free surface of a material 7 to be crushed, such as rock or concrete (in FIG. 2, one of them is shown). The blasting is performed by controlling the control device 5 for each pyrotechnic item 1 and filling it with a filling 9 such as sand or clay in the vicinity of the perforation exit on the free surface side. The electric detonator 4 is detonated by the control signal transmitted from the detonator, and the detonation of each detonator 4 is transmitted to the explosive pellets 3 and is blown out step by step.

  According to the pyrotechnics of the present embodiment, the control device 5 is compressed together with the metal tube 2 by the impact force generated by the explosion of the explosion pellet 3 and the gas pressure, and the free surface side of the perforation 8 is firmly attached with the filling 9. Even if it is a small pyrotechnic product, it can exert a crushing force even if the amount of the filling 9 is not enough, reducing noise, vibration, dust, etc. The load is low and the cost is low, and it is possible to perform safe blasting work. By molding the explosive into pellets, the packing density can be increased and the explosion energy can be increased, and the dosage can be adjusted in grams. It is possible to easily perform the above-described effects.

  The filling effect can be increased by reducing the clearance between the perforations 8 and the pyrotechnic 1. In consideration of the insertability, for example, for the pyrotechnic 1 having a diameter of about 12 mm, the diameter of the perforation 8 may be about 16 mm. In order to make the diameter of the pyrotechnic 1 about 12 mm, the outer diameters of the tube body 2 and the explosive pellet 3 are made as close to 12 mm as possible.

1. ・ Pyrotechnics 2 ・ Tube 3 ・ ・ Explosive pellet 4 ・ ・ Electrical detonator 5 ・ ・ Control device 6 ・ ・ Conductor 7 ・ ・ Fracture material 8 ・ ・ Perforation 9 ・ ・ Filling

Claims (2)

  It is a pyrotechnic used for blasting, which is loaded into the free surface of the object to be crushed, such as rocks and concrete, and is used for blasting. A pyrotechnic product comprising an explosive loaded, a detonator, and a control device that controls the timing of detonation of the detonator.   The pyrotechnic product according to claim 1, wherein the explosive is an explosive pellet formed into a pellet.