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Prognosis of surface subsidence affected by underground exploitation of ore vein deposits of Rozna type

中国有色金属学会会刊：英文版 2005年第S1期15卷 304-309页

作者： k. hortvik L. Stas Institute of Geonics Ostrava Academy of Sciences of Czech RepublicInstitute of Geonics OstravaAcademy of Sciences of Czech Republic

Methods of prognosis of effect of underground mining on surface deformations are nowadays well elaborated both in Czech Republic and in the world for sedimentary, especially coal deposits in which as a rule mining technology of work.ng by long-walls is applied. However, prognosis of development of subsidence depression above ore vein deposits of slab-lik. type with solid adjacent rock. (deposits of Rozna type) work.d by underground method is a very specific problem and it has not been satisfactorily solved until now according to available professional literature. In connection with long-term surveying observations a newly conceived mechanism of genesis of subsidence depression above uranium deposit of Rozna has been described. Based on it a geomechanical model of deposit situation is elaborated which then enables by means of mathematical modelling of surface subsidence development to predict development of subsidence depression both in stage of deposit mining and in period after termination of mining work. Further research of this problem within grant project No. 105/02/P026 of Grant Agency of Czech Republic solving proposed is oriented in connection with further real surveying observations of subsidence depression development at verifying of this newly conceived mechanism of genesis and of further development of earth surface above uranium deposit of Rozna (at further verifying of scope and degree of its validity). The research according to expectation shall contribute generally to deeper conceiving of methodology of evaluation of earth surface movements after termination of mining for ore vein deposits exploited by underground method at similar conditions.

关键词： mining subsidence prognosis mathematical modelling

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