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 tec...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 working by long-walls is applied. However, prognosis of development of subsidence depression above ore vein deposits of slab-like type with solid adjacent rocks (deposits of Rozna type) worked 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.展开更多
Coal beds rank among the weakest components of carboniferous rock massif in Upper Silesian coal basin. At present chemical grouting is being used in mining for reinforcing and stabilizing of rock strata. Due to low vi...Coal beds rank among the weakest components of carboniferous rock massif in Upper Silesian coal basin. At present chemical grouting is being used in mining for reinforcing and stabilizing of rock strata. Due to low viscosity of a majority of chemical grouting means they are preferably applied for reinforcing of cracked rocks and coal seams. Reinforcing coal seams by means of chemical grouting, the properties and behaviour of coal seams grouted in this way are largely changed. This contribution deals with some laboratory results of grouted sample failure testing by which the effect of reinforcement grouting has been elucidated from the point of view of rock burst control.展开更多
文摘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 working by long-walls is applied. However, prognosis of development of subsidence depression above ore vein deposits of slab-like type with solid adjacent rocks (deposits of Rozna type) worked 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.
文摘Coal beds rank among the weakest components of carboniferous rock massif in Upper Silesian coal basin. At present chemical grouting is being used in mining for reinforcing and stabilizing of rock strata. Due to low viscosity of a majority of chemical grouting means they are preferably applied for reinforcing of cracked rocks and coal seams. Reinforcing coal seams by means of chemical grouting, the properties and behaviour of coal seams grouted in this way are largely changed. This contribution deals with some laboratory results of grouted sample failure testing by which the effect of reinforcement grouting has been elucidated from the point of view of rock burst control.
