Concept of integrated technical evaluation of mine shafts

Currently in Russia, dozens of mine shafts sunk in the 1950s–70s are still employed in operating mines. Most of the shafts need repair and renewal of different complexity. The article discusses the concept of integrated technical evaluation of mine shafts, including three stages and three levels of on-site reconnaissance. The implementation matrix of the concept is described, and the case-studies of technical evaluation of long-term operating mine shafts are presented. The concept contains three stages of technical evaluation: determination of actual parameters of the rock–lining system; determination of actual load-bearing capacity margin of lining and adjacent rock mass stability; determination of interval and generalized criteria of mine shaft availability, as well as the surface, perimeter and deep-earth levels of reconnaissance. The scope of reconnaissance includes visual inspection of lining, a set of instrumental tests, core sampling, determination of concrete lining strength, geophysical and geomechanical analysis of adjacent rock mass, calculation and statistical processing of data with the subsequent categorization of technical availability of mine shafts. Finally, it is concluded on the necessity of a more accurate ranking of the technical availability categories with regard to further reconstruction and efficiency restoration in faulted mine shafts.

Mashin A. N. Concept of integrated technical evaluation of mine shafts. MIAB. Mining Inf. Anal. Bull. 2023;(10):31-42. [In Russ]. DOI: 10.25018/0236_1493_2023_10_0_31.

A.N. Mashin, General Director, JSC Transinzhstroy, Moscow, Russia, e-mail: info@tinso.ru.

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