Correlation of Abrasiveness Parameters of Tunnel Excavation Rock Soils Using Rotating Hollow Rod and Impeller Standards

Rocky soils from tunnel excavation sites using tunnel boring machines were used as test samples: limestones from the Suvorovskaya metro station and dolomites from the Rizhskaya station of the Moscow Big Circle Line. To assess the strength of the samples, tests were conducted to determine the ultimate compressive strength and tensile strength using the Brazilian scheme. To assess the abrasiveness, a setup with a rotating hollow rod by L. I. Baro n — A. V. Kuznetsov method (coefficient Ka) had been used. After re-equipment, it also had been used to assess the abrasiveness of rocky and dispersed soils using the rotating impeller method. I had been developed in the Laboratoire Central des Ponts et Chausées, France, abbreviated LCPC (coefficient LAC). Equations had been obtained for the correletion of LAC with the ultimate strength of rocky soils under compression and tension, with the average size of a piece, and with the coefficient Ka. Such equations can be used for operational control of the abrasiveness of rocky and dispersed soils, as well as for predicting the wear of cutting tools for their timely replacement during tunneling using tunnel boring machines, drilling boreholes and in other applications.

Mazein S. V., Prishchepov V. V., Voznesenskii A. S., Kutkin Ya.O. Correlation of Abrasiveness Parameters of Tunnel Excavation Rock Soils Using Rotating Hollow Rod and Impeller Standards. MIAB. Mining Inf. Anal. Bull. 2024;(11−1):116—128. [In Russ]. DOI: 10.25018/0236_1493_2024_111_0_116.

Mazein S. V.¹, Dr. Sci. (Eng.), associate Professor, e-mail: maz-bubn@mail.ru, ORCID ID: 0009−0001−8557−8906;
Prishchepov V.V.¹, PhD Student, e-mail: wowpolo96@mail.ru, ORCID ID: 0009−0000−6458−3290;
Voznesenskii A. S.¹, Dr. Sci. (Eng.), Professor, e-mail: asvoznesenskii@misis.ru, ORCID ID: 0000−0003−0926−1808;
Kutkin Ya. O.¹, Cand. Sci. (Eng.), associate Professor, e-mail: kutkin.yo@misis.ru, ORCID ID: 0000−0003−2644−3371;
¹ University of Science and Technology MISIS, 119049, Moscow, Leninskii Prospect, 4, b.1, Russia.

Voznesenskii A. S., e-mail: asvoznesenskii@misis.ru.

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