RU2650006C1 - Device for the detonation wave formation in an explosive substance charge - Google Patents

Abstract

FIELD: blasting operations.

SUBSTANCE: device for the detonation wave formation in an explosive substance charge (ES) refers to the area of blasting. Device includes an inert matrix with a detonation wiring made in the form of a network of detonation channels with a common input portion connected to the source of initiation with the portions located along the surface of the matrix, and end portions located at an angle to the surface and contacting directly with the blasting charge or with an additional layer disposed between the blasting charge and the matrix. On the surface of the matrix a different thickness overlay is installed, with a decrease in thickness from the center to the periphery, with a blind end hole for placing the common input section and grooves filled with ES connecting the common input section to the detonation wiring areas located along the surface of the matrix. In the case of an additional layer of ES, a sample is selected for its placement on the surface of the matrix facing the blasting charge.

EFFECT: invention makes it possible to ensure the synchronization of the onset of the detonation front in a blasted ES charge.

1 cl, 4 dwg

Description

The invention relates to the field of blasting and can be used to develop devices for the formation of a detonation wave of a given shape in explosive charges (BB).

The task to which the invention is directed is to ensure the synchronization of the occurrence of a detonation front in a detonated explosive charge, the surface of which is different from a flat one, by simultaneously simultaneously (with minimal time difference) detonation using an initiating device without a significant increase in size.

From the prior art there are known devices for the formation of a detonation wave in an explosive charge, aimed at solving this problem. For example, it is known the device according to patent US 3430563 (F42B3 / 02, published 04.03.1969), which contains a plate of a flexible inert elastomer having the shape of a matrix and detonation wiring in the form of a flat sheet of flexible explosive, pressed into the matrix in such a way that it forms a BB , consisting of coplanar strips of rectangular section with a common beginning for all strips. A sheet of flexible explosive, including a point common to all strips, is located in the thickness of an elastomer plate between its surfaces. The explosive strips have the same length, width and height, and a section forming a protrusion located at right angles to the surface of the elastomer plate departs from the end of each of them. The end of this portion of the strip is flush with the surface of the plate. The result is a series of end sections of the detonation wiring, spaced evenly along one of the surfaces of the flexible inert elastomer plate. When a detonation pulse is applied to a point common to the entire lattice, the explosive charge detonates simultaneously in a large number of points at which it emerges from the elastomer onto the plate surface.

To obtain a synchronous detonation front in a detonated explosive charge, a uniform arrangement of the detonation wiring outputs on the surface of the detonated charge and equal lengths of the coplanar explosive strips are necessary, in addition, it is necessary to fulfill the conditions for ensuring the stability of operation of the end sections. It should be noted that these conditions cannot be satisfied when using this design, which means that there is a difference in time, up to the failure of the operation of individual elements.

Another device is known from the prior art by which a detonation wave is generated in the explosive charge, aimed at solving the above problem and partially eliminating the disadvantages of the previous analogue (patent RU 2135935, description published on 08.27.1999). The known device is selected as the closest analogue and includes an explosive charge, an initiation source, detonation wiring made in an inert matrix. Detonation wiring is a system of rectangular detonation channels with a common input section on which the initiation source is mounted, sections located along the matrix surface and several outputs (end sections) located at an angle to the matrix surface that are in contact with either an explosive charge, or with an additional explosive layer placed on the charge. To increase the synchronization of the detonation front, it is necessary to comply with the condition of equal transmission times of the detonation pulse to the surface of the charge in order to minimize the difference in the arrival times of detonation pulses to the outputs of the detonation wiring — end sections located at an angle to the matrix surface.

However, if the shape of the detonated charge differs from the flat one, then with such a design of the initiating device, the synchronous detonation front in the detonated explosive charge may not be formed due to the influence of the shock waves generated from the explosion of the initiation source and the influence of gas-dynamic pickups from detonation channels wiring for synchronization of operation of its end sections.

The technical result achieved by the claimed invention is to reduce the level of asymmetry of the formed front of the detonation wave.

The specified technical result is achieved due to the fact that in the device for generating a detonation wave in the explosive charge, including an inert matrix with detonation wiring, made in the form of a network of detonation channels with a common input section connected to the initiation source, sections located along the matrix surface, and end sections located at an angle to the surface and in direct contact with a detonated charge or with an additional layer of explosive placed m between the detonated charge and the matrix, it is new that a different thickness plate is installed on the matrix surface with a decrease in thickness from the center to the periphery, with a blind end hole for placing a common inlet section and grooves filled with explosive material connecting the common inlet section with detonation wiring sections located along the matrix surface, and in the case of the presence of an additional layer of explosive on the matrix surface facing the detonated charge, rka for its placement.

Placing on the surface of the matrix of the lining with a blind end hole for installing a common input section, which is connected to the initiation source, allows to reduce the amplitude of the shock waves generated from the explosion of the initiation source, and at the same time to delay its arrival until the initiation pulse arrives through the detonation wiring channels.

The thickness of the lining is necessary to ensure a smooth transition of the protrusion grooves into the detonation wiring of the matrix, which allows the initiating pulse to be transmitted through such a transition without delay and the formation of additional technological gaps.

Performing on the surface of the matrix facing the detonated charge, sampling to place an additional explosive layer allows assembly without the use of adhesive layers, which impair the detonation transmission of the detonated charge.

Figure 1 shows a diagram of the inventive device; figure 2, 3 - overlay matrix; figure 4 is a photochronogram obtained by the operation of the inventive device.

Figure 1.2 shows: 1 - detonated explosive charge; 2 - inert matrix; 3 - channels located along the surface of the matrix; 4 - end sections of channels located at an angle to the surface of the matrix; 5 - overlay; 6 - common entrance area; 7 - grooved linings filled with explosives; 8 - an additional layer of explosives.

An example of a specific implementation of the claimed device can serve as a generator for generating a detonation wave in a blasting explosive charge of a spherical shape. Matrix material and pads - Accura resin. The matrix is 6 mm thick, the thickness of the lining in the center is 10 mm, and on the periphery it is up to 0.5 mm. The matrix channels are made in the size of 1.2x1 mm, the end sections of the matrix are made with a diameter of 2 mm. The sample is made 1.8 mm deep. The detonation wiring is made of plastic explosives. The initiation source is installed in the outlet, which is located on a common entrance area.

The claimed device operates as follows.

When the initiating pulse is transmitted from the initiation source (not shown) to the common input section 6 located on the plate 5, detonation along the grooves 7 of the plate 5 filled with explosives propagates to the periphery of the plate 5, which is made of different thickness, and smoothly passes to sections 3 of the detonation channel of the matrix 2 located along its surface. As it was found experimentally, from the actuation of the initiation source and the explosive of the common input section 6, a shock wave propagates along the material of the lining 5, the amplitude of which decays exponentially to the amplitude, which has a reduced effect on the desensitization of the explosive end sections 4 of the detonation wiring and does not prevent the propagation of the initiating impulse to them. As a result, the detonation pulse propagating along the detonation wiring reaches the explosive end sections 4 at the same time. As a result, synchronization of operation of the end sections 4 of the detonation wiring is achieved. The end sections 4 initiate an additional layer of explosive 8, located in the sample matrix 2. The detonation of this layer initiates explosive charge 1 with a reduced level of asymmetry at the front of the detonation wave (figure 4).

T.O. the implementation of the invention allows to initiate a detonated explosive charge with a minimum level of initial asymmetry without a significant increase in size.

Claims (1)

A device for generating a detonation wave in an explosive charge, including an inert matrix with detonation wiring made in the form of a network of detonation channels with a common input section connected to the initiation source, sections located along the matrix surface and end sections located at an angle to the surface and contacting directly with a detonated charge or with an additional layer of explosive if it is placed between the detonated charge and the matrix, characterized the fact that a different thickness plate is installed on the matrix with a decrease in thickness from the center to the periphery, with a blind end hole for installing a common inlet section and grooves filled with explosives connecting the common inlet section with detonation wiring sections located along the matrix surface, while in the case of placing an additional layer of explosive on the surface of the matrix facing the detonated charge, a sample was made to place it.

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