SU690416A1 - Source for generating seismic transversal waves in soil - Google Patents

Description

;; -. ;; one ;. . . .

The invention relates to geological exploration using seismic studies in the excitation of transverse waves in the ground,

The method of initiating transverse seismic waves in GRUITE by means of explosive explosive charges dispersed in a polishing cloth filled with material and decorated with vertical tracing made by an artificially crafted {.

The disadvantage of the method is that after in the working (specified) direction, simultaneously with the field, shear compression waves (i.e., shear waves) are compressed, i.e. Continuous e-waves created the background and appendixes to the PSTNI 6th seismic record, which worsens the level of explosive impact on the ground, and ultimately decreases the efficiency of transverse seismic waves.

 As a progptype.pryn tg, the source of excitation of transverse SEXYGICAL wills in the soil containing

soil block, yf separation

the rest of the soil mass is vertical HniMH, and a damper block with charges that are dispersed over its surface, painted in the direction of the generating unit 2.

When using an emitter of such a source, the North American & the direction of influence, not in all cases is provided more reliably the allocation of transverse questions of a given polarization

0 against the background of noise waves. The seismic efficiency of the VO source is many times lower than the seismic efficiency of the shock effect.

The purpose of the invention is to increase the efficiency of transverse excitation.

5 with zasmicheskie waves for: polarization by improving the directivity - to raise its direction;

The goal is achieved by

0 that, between the generator and damper units, an additional power unit is installed.

FIG. Figure 1 shows the pre-coke source of seismic waves in the section; in fig. 2 - the same, top view,

Claims (2)

In the ground, vertical slots 1-6 are made, thereby isolating 8 in the array 7, shock 9 and demilling 10 blocks of rock, and blocks 9, 10 are completely separated from the array by the zone 11 of the broken space created in the horizontal slot 12. To create vertical 2, 3 and horizontal 12 shells use, for example, blockers having two parallel recurring bodies for cutting two vertical slits at a time and a horizontal cutter connecting the cutting bodies and serving to subdivide the block of rocks located between two pa parallel vertical slots. In the slit 3, the explosive charge 13 is fixed between the shock and damper blocks on the vertical wall of the shock block, and all the vertical slits, except for those that delineate the generating unit 8, are filled with absorbing material 14 to attenuate the blast energy in non-working directions. Explode charge of cc. The energy of the explosion drives the shock unit 9 in a given direction, the shock unit separated from the main rock mass, when meeting the working surface of the generating unit 8, produces a shock effect on this surface, exciting transverse waves of a given polarization in the surrounding array 7 through the lower base of the generating unit 8. The explosion effect in non-working on the right side of the x is weakened by the penetration of material 14, vertical shielding slits 4-6, zone 11 of impaired performance and damper block 10. The proposed sources | The excitation can be applied not only when driving to a generating unit prepared in advance in the ground, but also as an impact on the ledge, indicated in the soil by a vertical slit, conducted perpendicular to the given direction of impact. To excite transverse seismic waves of rotational type, blocks and slits are placed on the same axis axis along the rays emanating from and; its center. The source according to the invention makes it possible to replace the direct effect of an explosive charge explosion on the working surface of the generating unit 8 in the ground by the impact of the block 9, separated from the main body and set in motion by the explosion energy. Since the shock effect upon the excitation of transverse seismic waves of a given polarization excites a smaller background of the noise-interference as compared with an explosive impact, and the seismic efficiency of the impact action is higher than the seismic efficiency of the explosive impact, the source according to the invention significantly increases the efficiency of transverse seismic wave excitation in Ground compared to known sources. The invention The source of excitation of transverse seismic waves in the ground, containing a generating block of soil, separated from the rest of the array of soil by vertical slots, and a damper unit with a charge of explosive dispersed on its surface facing the generating unit, tl and h This is so that, in order to increase the efficiency of excitation of transverse waves of a given polarization in the ground, an additional shock unit is used between the generating and damping units. Sources of information s account in the examination 1. Inventor's certificate USSR № 371543, cl. 1/13, 1973. - 2. Authors' certificate of the USSR for application- 2050289/25, cl. a01 V 1/13, 02.08.74 (prototype). / eight / s s g 9 3 fO I L I I r