Study On The Strata And Surface Movement Control Of The Solid Backfilling Mining In Yangzhuang Coal Mine

The mining subsidencecontrol technology of Solid Backfilling Mining is one of the main technical approaches to solvethe problem of “three under” coal mining. Based on the case of the Soild Backfilling Mining in Yangzhuang Coal Mine under the second company of Kouzi, through on the analysis of the field measured data, the similar material and numerical simulation in order to the comprehensive analysis of the law of strata and surface movement and deformation control of the Solid Backfilling Mining, the main study finding and work are followed as:1) According to the field measured data of the surface and surface buildings of Yangzhuang Coal Mine, to analysis and summary the dynamic and static movement law of surface and buildings in the Solid Backfilling Mining. The parameters of the dynamic process and stability of surface movement basin are obtained, characteristics of the surface dynamic subsidence velocity in the process of the Solid Backfilling Mining are revealed. Parameters of the surface probability integral methodare determined.2) By the similar material simulation method, the process and characteristics of the strata movement and surface features of the Solid Backfilling Mining and Caving Mining method are compared.The movement and deformation characteristics of the rock strata and the ground surface under different mining methods and the evolution of the whole strata and surface movement are revealed.3) By the FLAC3 D numerical simulation technology, the influence of the control effect of overlying strata and surface movement and deformation under different filling ratio in the Solid Backfilling Miningwas simulated and studied. And based on the prototype of Yangzhuang Coal Mine to research on the influence of different geological mining factorson the effect of rock strata and ground surface subsidence control in the Solid Backfilling Mining. The influence law of different thickness of the loose layer, different loose layer and bedrock layer thickness ratio, different mining depth of mining under the condition of the Solid Backfilling Mining surface movement deformation control effect are obtained.4) Based on the above research results, the subsequent Solid Backfilling Mining working faces are designed in Yangzhuang Coal Mine under the second company of Kouzi.