Issues of the journals Геофизика 2014 y. issue 4

Estimation of seismic effect drilling-and-blasting operations for buildings

(Verkholantsev A.V. Shulakov D.Yu. )

The article describes the results of analysis of seismic effect measured for single explosions in mines and open pits. It is shown the main factors that influence on seismic effect magnitude are not only distance and explosive mass but also triggering direction, system of initiation and rock properties near the surface. It means that formula to estimate seismically safe distances established by regulatory documents is suitable only for initial rough calculation. Reliable determination of amplitude-to-distance dependence is possible only after in-situ measurements taking into account both blast parameters and soil conditions. The resulting value of seismically safe distance can differ significantly (in times) from that calculated with statutory formula.......

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  • 2014  № 4, pp. 40-45

Seismic-acoustic emission of producing formation in detection and extraction technology

(Shumilov A.V. Dryagin V.V. Ivanov D.B. Nigmatullin D.F. )

The results of studies of seismic acoustic emission occurring in the oil-saturated porous geological environment with acoustic impact force in the well. It is show that the dynamic nonlinear process in the reservoir activated when the external elastic impact on deposit and as a consequence alter the energy state of the environment, which is reflected in the change of the acoustic emission. The parameters of the seismic acoustic emissions uniquely associated with the character of the productive formation saturation and permeability.......

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  • 2014  № 4, pp. 54-58

Statistical processing of observetional data in comparative assessment of opportunities of geophysical methods

(Karapetyan K.A. Chilingaryan A.Z. )

Linear filters are one of the most effective methods of statistical processing of geophysical observations. Provided by us energy maximizes the signal-to-noise ratio and solves the problem of selection. At comparative assessment of geophysical observations on Physics and Geological model of Sotk gold deposit, increased the information content, when using the energy filtering. With the application of energy filtration geophysical methods’ effectiveness increases and balanced.......

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  • 2014  № 4, pp. 59-62

Opportunities of magnetic measurements in solving problems of soil geophysics

(Zolotaya L.A. Kosnyreva M.V. )

The article describes possibilities of applying magnetic exploration to solve the tasks of soil mapping. Authors have developed methodology to explore magnetic properties of heterogeneous soil profiles in their natural bedding. By results of physical and mathematical modeling of soil sections authors provided scientific justification for practical application of magnetic survey when studying soils. For the first time, on the example of complex of gray forest soils of Vladimir Opolye (VNIISH), maps of abnormal magnetic field reflecting space heterogeneity of soil cover are obtained. Opportunities and restrictions of magnetometric method when studying soils are shown.......

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  • 2014  № 4, pp. 63-68
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