SU1038898A1 - Seismic oscilation source impactor - Google Patents

Abstract

A SOURCE OF SOURCE OF SEISMIC VIBRATIONS, containing a hollow body with a bottom and a head and placed in a hollow body with the ability to move the inertial mass in the form of bulk material, characterized in that, in order to improve seismic efficiency by adjusting the parameters of the shock pulse, depending on the properties of the studied rocks and ensuring its constancy, the bottom and the head are made concave on the side facing the inertial mass, and the bottom is mounted with the possibility of moving along the hollow core Pus and rigid fixation with in it. 8 (L ff 00 00 00: about 00

Description

The invention relates to a source of seismic oscillations of the type intended to excite seismic waves in the study of mountain exploration {for the presence of geo logical zones of complications in the extraction of minerals, such as potassium salts, as well as to test building materials and models of engineering structures for a concentrated blow. .

Known drummer side, made in the form of a solid massive ball Cl}

The disadvantage of this drummer is that, when struck, the drummer bounces off the production wall and applies one or several rtb to it. repeated blows that create additional interference waves that do not allow unequivocal and. right to interpret seismic material. . .

Also known is a drummer drummer containing a hollow body with an internal cylindrical surface in which a cylindrical inertial mass is installed, equipped with a spring and hydraulic braking device, and its own (the body cavities are filled with working fluid C2V3.

The disadvantage of the known beater striker is that it has a low seismic efficiency and durability, a complex structure. Much of the kinetic energy of the inertial mass is lost to overcome the spring resistance, the loss in the hydraulically braking device and the cracking when the inertial body slides when moving inside the body. The presence of rubbing pairs and braking devices complicates the design of the impactor hammer, reduces its reliability and durability.

Closest to the present invention, there is a drummer of a source of seismic vibrations, comprising a hollow body with a bottom and a head, and an inertial mass in the form of a granular material Гз1 located in a hollow body with possible movement.

However, the well-known drummer does not allow one to adjust the parameters of the shock impulse depending on the properties of the rocks and to ensure its constancy, which reduces the seismic geeffectiveness and source.

The purpose of the invention is to increase the seismic efficiency of the napaMetpos per-perimeter of percussion. pulse depending on the properties of the investigated mountain rocks and ensuring its stability.

The set goal is achieved by the fact that in the impactor of the seismic source, containing with the bottom and the head and placed in the hollow case with the possibility of moving the inertial mass in the form of bulk material, the bottom and the head are made concave on the side facing the inertial mass, and the bottom is mounted to move along the hollow core and rigid fixation in it.

Making the movable bottom and head of the body concave, such as spherical shape, ensures the impulse stability, and providing the possibility of changing the distance between the bottom and the body allows tuning the impactor to the optimum mode of operation depending on the physical and mechanical properties of the rocks.

Figure 1 shows the impactor of the seismic source, the starting moment; figure 2 - the same, during: acceleration; on fig.Z - the same at the moment of impact. . The drummer impactor contains a hollow cylindrical body 1. with a head 2, in which is placed an intruder mass 3 in the form of a granular material, for example, metal balls. The rear part of the housing 1 is mounted for movement of the bottom 4 with the inner hemisphere 5 and the movement and fixation mechanism, which is made in the form of a screw-nut gear mounted on the plate 6 and consisting of a kronigte 7, rigidly mounted on the body 1, sleeve 8 through which the screw 9, fastened on the bottom 4 by means of the bracket 10, and nuts 11 and 12 is passed. The head 2 on the side facing the inertial mass is made concave, for example in the form of a hemisphere. Case 1 is provided with a bracket 4 13 for connection with a rod of a source of seismic signals of the type.

Drummer works sredonchim zadon.

When the hammer is raised to a predetermined height, the dry inertial mass 3 is located in the head 2 symmetrically with the axis of the drummer. At the beginning of the movement, the inertial mass is interleaved along the spherical surface of the head and, under the action of inertial forces acting upon acceleration of the impactor, is centered relative to the axis of the impactor in the spherical bottom 4 of the body. At the moment of impact, thanks to the spherical head 2, the inertia mass 3 is centered and, therefore, when the impactor and the spindle are ovced along the axis of the impactor. From the beginning, the main shock pulse is transmitted, which is transmitted when the hollow body strikes 1.

Claims (1)

SHOCK SOURCE OF SEISMIC OSCILLATION SOURCE, comprising a hollow body with a bottom and a head and placed in a hollow body with the ability to move the inertial mass in the form of bulk material, characterized in that, in order to increase seismic efficiency by adjusting the parameters of the shock pulse depending on the properties of the rocks and to ensure its constancy, the bottom and head are made concave from the side facing the inertial mass, and the bottom is installed with the possibility of movement along with the ss ί hollow body and tight fixation in it. 1 1 ^S m / J - 3 □ o □ o o 00>