Известия Томского политехнического университета: Инжиниринг георесурсов (Aug 2019)
ON THE ISSUE OF SAFE OPERATION OF THE UNDERGROUND TRAVEL COMPLEX «THE KINGDOM OF ETERNAL FROST»
Abstract
Relevance. Investigations of the thermal regime and development of effective ways of controlling it in underground structures of various purposes have received considerable attention in recent years. This is related not only to intensification of underground space development, but also to the variety of thermal conditions and the degree of influence of the temperature factor on the efficiency and safety of construction and operation of underground structures. As it is known from the mining practice in the North, the thawed rock mass, especially above the roof of the excavations, creates significant loads on the supports, sometimes exceeding permissible, which causes irreversible deformations, and sometimes leads to its collapse. Objects: galleries of the tourist complex «The Kingdom of Eternal Frost» located on the 5th km of the Vilyuisk tract of Yakutsk. The aim of the research is to develop the measures to ensure the required technical condition of the thermal regime complex and recommendations for securing underground mining workings providing safe conditions for tourists to stay. Methods: studies of the temperature regime, visual inspection of the mining slope and underground mine workings of the tourist complex, selection of the type of fastening for the required conditions, calculation of the fastening parameters. The paper introduces the results of the studies of the thermal regime of underground mine workings during winter operation period, the results of a visual survey of the mining slope and underground mine workings. The authors give recommendations to ensure the stability and anchoring of the zones for formation of underground mining excavations of the tourist complex «The Kingdom of Eternal Frost». The calculation of the temperature mode of the digital computer and the required power of the refrigerating machines was carried out using the MuseumCVM software package developed at the Laboratory of Mining Thermophysics of the Institute of Mining of the North named after N.V. Chersky. To reduce energy consumption for producing artificial cold in summer, it is recommended to hold annual refrigerated charge in autumn and spring.
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