Deformation risk analysis and geomechanical monitoring for the natural–technical system of a spoil dump and its foundation

The operating experience of spoil dumps, their surveying and the analysis of dump deformation causes shows that instability of dumps is mostly connected with the factors of hydrogeology. The timely detection of destructive processes is possible using a monitoring survey algorithm and the found qualitative and quantitative criteria of safety. From the experimental observations over an external spoil dump arranged on an inclined and bedded foundation complicated with water flow channels, all possible causes of the dump deformations are described. The quantitative (failure probability) and qualitative (after-effect severity) estimates of deformation risk are obtained. Using the frequency–after-effect severity risk matrix, the maximal deformation risk level is found. Based on the risk estimates, the optimized design of an observation station is proposed, which ensures control over the most vulnerable sites of a test object at the minimum number of check points. The best acceptable methods and tools for positioning check points in terms of their accuracy and material inputs are proposed for the test conditions. The displacement determination errors are estimated for the check points of the observation station. The observation procedure is developed, and two levels of criterial values are introduced for the diagnostic indicators of the natural–technical system of a dump and its foundation.

Ananenko E. V., Bakhaeva S. P. Deformation risk analysis and geomechanical monitoring for the natural–technical system of a spoil dump and its foundation. MIAB. Mining Inf. Anal. Bull. 2023;(9):5-21. [In Russ]. DOI: 10.25018/0236_1493_2023_9_0_5.

E.V. Ananenko¹, Senior Researcher, e-mail: ananenko_ev@mail.ru,
S.P. Bakhaeva¹, Dr. Sci. (Eng.), Professor, e-mail: bsp.mdg@kuzstu.ru,
¹ T.F. Gorbachev Kuzbass State Technical University, 650000, Kemerovo, Russia.

E.V. Ananenko, e-mail: ananenko_ev@mail.ru.

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