RU201703U1 - CHARGE FOR EXCITATION OF SEISMIC OSCILLATIONS - Google Patents

Abstract

The utility model relates to charges of industrial explosives designed to excite seismic vibrations in geophysical surveys. The charge for the excitation of seismic vibrations includes a cylindrical explosive block with a through axial channel, at both ends of which, coaxially to each other and parallel to the block's longitudinal axis, blind holes-sockets for electric detonators are made to ensure counter-synchronous initiation of the charge. Enhancement of the impulse from the explosion of the seismic charge is provided, which makes it possible to increase the efficiency of work without increasing the mass of the charge. 1 ill.

Description

The utility model relates to charges of industrial explosives (HE) designed to excite seismic vibrations in geophysical surveys.

Known explosive sources of seismic vibrations [1] in the form of a garland of cylindrical blocks of explosive, lowered into the well and initiated using an electric detonator. The length of such an assembly is much greater than its transverse dimension (diameter), while an ideal longitudinal wave emitter is a pulsating sphere [1]. Reducing the length of the garland of charges reduces the power of the seismic source.

Known charge for exciting seismic vibrations [2], including a cylindrical block explosive with a through axial channel and a blind hole made from one of its ends, which houses an intermediate initiator with a socket for an electric detonator, providing one-sided initiation of the block.

It is known, for example [3, 4], that bilateral initiation of an explosive charge reduces the explosive transformation time and provides an additional pressure peak upon collision of converging detonation waves, which provides an increase in momentum at the same charge mass.

The proposed utility model provides amplification of the impulse from the explosion of a seismic charge, which will increase the efficiency of work without increasing the mass of the charge and is (see Fig. 1) a cylindrical block of explosives 1 with a central channel and blind holes - sockets for electric detonators 2, made at both ends checkers parallel to the axis.

The device works as follows.

After lowering into the well, electric detonators are synchronously supplied with electric current pulses, initiating a block simultaneously from opposite ends. Two detonation waves are formed, the fronts of which move towards each other and meet approximately in the middle of the checker. As a result of a decrease in the explosive transformation time and an additional increase in pressure during the collision of detonation waves, the total impulse from the explosion of the charge increases.

Links by text

1. Seismic survey: textbook / G.I. Rezyapov; Tomsk Polytechnic University. - Tomsk: Publishing house of the Tomsk Polytechnic University, 2012.

2. Charge for excitation of seismic vibrations ZSB-A and method of charge manufacture. RF patent No. 2420502 dated December 29, 2009

3. A.A. Deribas, N.A. Kostyukov, A.M. Staver / Collision of plane detonation waves in ammonite 6ZhV // Physics of combustion and explosion. - 1975. - No. 3. - from. 456-462.

4. V.A. Kutuev, P.V. Menshikov, S.N. Zharikov / Analysis of research methods for explosive detonation processes // Problems of subsoil use. - 2016. - No. 3. - from. 78-82.

Claims (1)

A charge for the excitation of seismic vibrations, including a cylindrical explosive charge with a through axial channel, characterized in that on both ends of the checker, coaxial to each other and parallel to the longitudinal axis of the checker, blind holes are made for electric detonators to ensure counter-synchronous initiation of the charge.

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