Dynamic prediction method for movement deformation of mining overburden strata

Abstract

The invention relates to a dynamic prediction method for movement deformation of mining overburden strata, in particular to a quantitative dynamic prediction method for determining any predicted level and rock stratum sinking, inclination, curvature, horizontal movement, horizontal deformation and vertical deformation values at any moment in the mining overburden strata. According to the dynamic prediction method for the movement deformation of the mining overlying strata, the mining overlying strata is layered according to the lithology, and according to the lithology evaluation coefficient of the overlying strata and the sinking coefficient model determined on the basis of the lithology evaluation coefficient, the sinking coefficient influence factor of each layered strata in the overlying strata is solved, so that the prediction accuracy of the separation of the overlying strata is improved; and the new model omits a very tedious process of judging the key layer of the overlying strata, and the calculation amount and the prediction difficulty are greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of mining subsidence research, and in particular relates to a new method for quantitative and dynamic prediction of mining overlying rock movement and deformation. Background technique [0002] Overlying rock and surface mining subsidence caused by coal mining is a complex four-dimensional problem that varies with time and space. Especially when the total caving method is used to manage the roof of the goaf, it will usually cause serious movement and deformation of the mining overlying rock and the ground surface, causing serious mining damage to the ecological environment and human environment of the mining area. At present, relatively more research work has been carried out on the prediction of surface movement and deformation caused by coal mining, and the results are relatively fruitful; It is estimated that there are fewer studies on the dynamic movement and deformation of dynamic overlying rocks and t...

AI Technical Summary

Problems solved by technology

He Guoqing pointed out in his work that the prediction of movement and deformation on any horizontal plane inside the overlying rock can be calculated using the same method and model as the prediction of any point on the surface, the difference is that the parameters on this horizontal plane inside the rock mass should be used However, the prediction of overburden movement and deformation dynamics has not been studied in depth. Only some parameters of overburden movement and deformation are given, especially the calculation model for the strata subsidence coefficient inside the excavated overburden is not given. Therefore, Wang Yuehan, Deng Kazhong, etc., based on the analysis of a large number of measured data and similar material simulation tests, assumed that the amount of broken bulk of the rock mass is linearly distributed with the distance from the coal seam, and constructed A model for predicting the subsidence coefficient of any horizontal strata inside the mined overburden was proposed, but no further research has been done on the prediction of the movement and deformation of the strata inside the mined overburden

Scholar B.A. Buklinski analyzed a large number of measured data of mined rock formations in the Donbass mining area, and established a calculation of the movement and deformation of the layered rock mass on the basis of the movement attenuation function. However, the model does not have It is not convenient to predict the dynamic movement and deformation of the overburden during the mining process by associating the periodic breaking of the old roof with the movement and deformation of the overlying rock

Moreover, none of the above studies have conducted relevant research on the development process of the overlying strata detachment layer.

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