The method of using multicomponent strain sensors for the primary assessment and monitoring of the stress-strain state of a rock mass

Ensuring the safe condition of mining operations in high-impact deposits is based on the use of various seismic monitoring systems, which currently do not provide reliable results. To increase the reliability of the forecast of dynamic manifestations of mountain pressure, it is proposed to use integrated monitoring systems. The article discusses the main provisions of the methodology for using multicomponent strain sensors for the initial assessment and monitoring of the stress-strain state of a rock mass. The methods include hardware such as multicomponent strain sensors, autonomous control systems, drilling and auxiliary equipment for the initial assessment of stress-strain state and the arrangement of deformation monitoring stations, software for conducting observations and processing the results, preliminary criteria for the occurrence of dangerous conditions and methodological recommendations for carrying out relevant work. Threshold values of deformations on autonomous control complexes in combination with threshold data of other types of monitoring must be certified by local control methods and, if confirmed, necessitates technical measures to bring the array to a safe state. Examples of some results of joint deformation, seismic and technological monitoring when assessing the stress-strain state of the studied massif are given.

Morozov K. V., Demekhin D. N., Bahtin E. V. The method of using multicomponent strain sensors for the primary assessment and monitoring of the stress-strain state of a rock mass. MIAB. Mining Inf. Anal. Bull. 2024;(11−1):25—38. [In Russ]. DOI: 10.25018/0236_1493_2024_111_0_25.

Morozov K. V.¹, Head of the Laboratory of Geomechanics, Scientific Center for Geomechanics and Mining, е-mail: morozov_kv@pers.spmi.ru, https://orcid.org/ 0000−0003−3597−756X, Scopus Author ID: 57196008021;
Demekhin D. N.¹, Senior Researcher, Laboratory of Geomechanics, Scientific Center for Geomechanics and Mining, е-mail: demyokhin_dn@pers.spmi.ru, https://orcid. org/0000−0001−7958−2290, Author ID: 56462968700;
Bahtin E. V.¹, Leading Engineer, Laboratory of Geomechanics, Scientific Center for Geomechanics and Mining, е-mail: bahtin_ev@pers.spmi.ru, Author ID: 57211915520;
¹ Empress Catherine II Saint Petersburg Mining University, 2, 21st Line, St Petersburg 199106, Russia.

Morozov K. V., е-mail: morozov_kv@pers.spmi.ru.

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