Improvement of roadbed structure in open pit mines in severe climate of the Russian Far East

Mining industry of the Russian Far East continues developing coal, gold, uranium, copper, fluorite, lead and zinc deposits using mostly the method of open pit mining. Haulage of overburden and minerals in open pits is performed by large dump trucks with capacity of 30 to 450 tons. Haul roads constructed on slopes bear a very high load. Quality maintenance of haul roads in open pits includes reinforcement of slopes and beds with geogrids and geofibers. Arrangement of drainage sheets made of geofiber in depth of roadbeds needs much care, otherwise the fiber layer can break because of sagging, which results in overwetting and unscheduled repair of a road section. This article proposes a method to calculate deformation of a fiber sheet and a soil layer in accordance with the laws of elasticity. A case-study of calculation of vertical displacements in a drainage sheet as a consequence of deformation of broken stone underlayer under wheel pressure of dump trucks with capacity from 30 to 450 tons versus the depth of the drainage sheet is presented. The curves of the vertical displacement versus depth of a drainage sheet in a roadbed are plotted. The plots help specify the drainage sheet depth as function of load-carrying capacity of dump trucks in open pit mines.

Gerasimov V. M., Nizhegorodcev E. I. Improvement of roadbed structure in open pit mines in severe climate of the Russian Far East. MIAB. Mining Inf. Anal. Bull. 2023;(8):18–26. [In Russ]. DOI: 10.25018/0236_1493_2023_8_0_18.

V.M. Gerasimov¹, Dr. Sci. (Eng.), Professor, Head of Chair, e-mail: kafsmim@zabgu.ru, ORCID ID: 0000-0002-6448-0141,
E.I. Nizhegorodcev¹, Cand. Sci. (Eng.), Assistant Professor, e-mail: dj_world@mail.ru, ORCID ID: 0000-0001-9910-4587,
¹ Transbaikal State University, 672039, Chita, Russia.

E.I. Nizhegorodcev, e-mail: dj_world@mail.ru.

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