EXPERIENCE OF BOREHOLE SEISMIC SOUNDING FOR THE ASSESSMENT OF PHYSICAL STATE OF ROCK MASS USING 2D AND 3D REPRESENTATIONS

Megacities currently expand through development of underground space with a view to constructing transportation routes, underground parking areas, commercial areas, etc. In the course of implementation of such projects, the risk of accidents and damage of surface site development in the influence zone of underground construction considerably elevates. The accident risk reduction potential appears only with comprehensive analysis of the specific situation, with finding and minimizing adverse factors that affect the existing building system or a new construction site [1, 2]. Application of geophysical methods for integrated assessment of enclosing rock mass considerably improves operational efficiency and objectiveness of geotechnical monitoring in whole. The method of borehole-to-borehole seismic sounding (BSS) is advantageous for fine resolution and applicability at any depth, event in the space-limited urban environment. The article describes BSS application in assessment of physical state of soil area below surface site with deformation phenomena caused by an accident during subway construction. The benefits of 3D BSS representations in detection of local anomalies in cross-sections are demonstrated.

For citation: Dorokhin К. А. Experience of borehole seismic sounding for the assessment of physical state of rock mass using 2D and 3D representations. Gornyy informatsionno-analiticheskiy byulleten'. 2019;5:80-88. [In Russ]. DOI: 10.25018/0236-1493-2019-05-0-80-88.

Keywords

Borehole-to-borehole seismic sounding, borehole, borehole seismic cable, impulse generator, seismic tomography, tunnel, geological environment, seismic source, fan observation pattern.

Issue number: 5
Year: 2019
ISBN: 0236-1493
UDK: 550.834.015
DOI: 10.25018/0236-1493-2019-05-0-80-88
Authors: Dorokhin К. А.

About authors: К.А. Dorokhin, Candidate of Technical Sciences, Head of Laboratory, e-mail: d.k_a@mail.ru, OJSC «SRPSI «Lenmetrogiprotrans», 191002, Saint-Petersburg, Russia.

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