SU1740971A1 - Pin-point action charge - Google Patents

Abstract

Use: mining, directed destruction of rocks by an explosion. SUMMARY OF THE INVENTION -: The charge comprises a capsule of circular cross section filled with an explosive with diametrically opposed longitudinal points and a detonator inserted into the end of the capsule. The points are made with triangular transverse grooves consistently located along the length of the capsule and inclined from the end of the capsule with a detonator. 1 hp f-ly, 3 ill.

Description

The invention relates to the mining industry, to designs of directional charges, for example, for the destruction of rocks and blocks by an explosion.

Devices for the directional destruction of rocks are known, involving the use of the cumulative effect of an explosion by creating charges of various shapes.

When such charges explode, the cumulative effect is used to enhance the local effect of the explosion with charges that have a notch of conical or spherical shape at one end.

A directional blasting tube is known, comprising an elongated stiff tube having a sickle-shaped cross section with an explosive charge located along the tube.

The disadvantage of these devices is that the force of the explosion (cumulative jet) acts on compression, which reduces the efficiency of the explosion.

Closest to the present invention is a device for cutting, containing a charge in the form of a capsule of a cylindrical shape with longitudinal points, filled with an explosive.

A disadvantage of the known charge design is the low efficiency of the explosion in the directions of the points and the depth of the rock mass. The cylindrical charge with continuous longitudinal points does not provide an enhanced explosion effect deep into the array and increases the explosive consumption, since when a cylindrical charge is initiated, the action of the explosion force is directed perpendicular to the cylindrical surface and has a radial direction. With significant charges on the charge in the event of a blast on a single bare plane, the charge efficiency drops sharply. The purpose of the invention is to increase the directional effect of the charge in the directions of the points and deep into the rock mass and reduce the consumption of explosive.

This goal is achieved by the fact that the device contains a capsule with longitudinal points, filled with explosive.

According to the invention, in a capsule of circular cross section, narrowing from the end, with a detonator, the distances between the diameters of the diametrically opposite and constant along the length of the capsule

with

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the tips of the points are made with triangular transverse grooves in series, located along the length of the capsule and inclined from the end of the capsule with a detonator. Such a charge design enhances the effect of an explosion in the radial direction and deep into the array due to the cumulation effect and the ratio of the areas that form (Fig. 1) the points to the areas of the conical surface, which must be equal to or greater than one. Under these conditions, the forces required to form clefts are reduced.

The proposed device is characterized by the presence of transverse triangular grooves in the points, sequentially arranged along the length of the capsule and inclined from the end of the capsule with a detonator.

Figure 1 shows the device; in Fig.2 - the same, top view: Fig 3 - node I in Fig.1.

The device comprises an action capsule tapering from the end 1, with a detonator 2 and longitudinal points 3, in which triangular transverse depressions 4 are made, successively arranged along the length of the capsule and inclined from the end of the capsule with a detonator. The action film filled with the explosive 5 is pre-installed in the hole 6, cement mortar or concrete is introduced into the space between the hole and the capsule. The hole of the hole is filled with a tamping 8. To increase the efficiency of the charge explosion, it is necessary that forming a conical surface must be equal to or greater than one, and the magnitude of the areas forming the cusps increases along the length of the capsule. This ratio will be fulfilled when the area of cusps and cumulative grooves is equal to or greater than the area forming the conical charge. In this case, the efficiency of the explosion increases due to the fact that the amount of explosive per unit area will increase.

The proposed device for the destruction of rocks is made for example

from thermoplastic materials or paper. To simplify manufacturing, the capsule can be an integral part (the conical part and the points are made separately) in this

in the event of a spike with triangular transverse grooves, they are welded, fastened or glued to a conical surface.

The device works as follows.

A pre-charge consisting of several capsules and an action movie 1 is installed in a hole 6 drilled in a rock or concrete. 9 Enter into the gap between

the cement mortar or concrete 7 is filled with a capsule and a hole in the wall. The mouth of the hole is filled with a stem 8, then the charge is detonated by an electric detonator 2. During the explosion, due to the

the triangular transverse depths of the capsule length, the forces required for the formation of crevices in the direction of the points are reduced. The conditions under which 81/82 5: 1 is observed (Fig. 2) allow an increase in the force of the explosion in the directions of the points and the triangular transverse grooves. In addition, the shape of the charge, which narrows from the end with the detonator, enhances the action of forces during an explosion deep into

array and reduces explosive consumption.

Claims (1)

Claim 1. A directional action charge comprising a round-cross sectioned capsule filled with an explosive with longitudinal diametrically opposite points, a detonator located at the end of the capsule, characterized in that Charges, spikes are made with triangular transverse grooves consistently located along the length of the capsule and inclined from the end of the capsule with a detonator. 2 Char d. 1, characterized in that the capsule is made tapering from the end with a detonator, and the distances between the tips of the points are constant along the length of the capsule. I SrigZ FIG. 2 Editor A.Dolinich Tehred M. Morgenthal Order 2078 Circulation: Subscription VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, 4/5 Raushsk nab. Proofreader N.Slobod nickname