Study On Rock Strata Movement And Surface Impact Of Steep-thin Orebody Mining In Metal Mine

Underground mining poses a threat to the surface and the surface buildings,because of many related factors, the analysis of strata and surface movement anddeformation is more complicated for the steep-thin orebody mining in metal mine.The research of this article based on the steep-thin orebody underground mining inmetal mine, according to characteristics of rock strata movement and deformation inthis kind of mine, as well as the engineering characteristics of1#and3#orebody inJiangdong gold mine, by using the comparison analysis of FLAC3D miningcalculation models, with the combination of numerical simulation and fieldinvestigation in Jiangdong gold mine, engaged in the study of strata movement andsurface impact of steep-thin orebody in metal mine. The main content of this researchis as follows:(1) Expounded the development and research status in the field of miningsubsidence, and summarized the natural geological conditions and mining technicalfactors influencing metal mining, analyzed the calculation method of main parametersof rock strata and surface about movement and deformation, the angle parameters ofsubsidence basins and several key parameters for measuring impact of surfacedeformation with building, provided theory basis for strata movement anddeformation of steep-thin orebody in metal mine;(2) According to the main characteristics of the steep-thin orebody mining, byapplying FLAC3D mining calculation models in groups, compared the numericalsimulation results, summed up the law of rock strata and surface movementdeformation for steep-thin orebody;(3) Carried out the surface building survey and the engineering geological surveyin study area, mastered the detailed background information of mining engineering. Inaddition, completed classification and evaluation of rock mass quality and indoor rockmechanics experiments, processed the data of experimental results for obtaining therock mass mechanics parameters of numerical simulation models; (4) Used numerical simulation software to analysis the characteristics of stressand displacement in mining process, transformed the calculation results of the surfacedeformation to curve charts, combined with the information of surface survey,analyzed and verified the location of surface which may be destroyed, finallydetermined the influence range of mining, tendency and the related angle parametersof subsidence basin. Moreover, considered filling in goaf, then analyzed thecomparison of results between filling and non-filling;(5) By using numerical simulation method, combining the advantages ofsoftwares, realized the collaborative applications of a variety of numerical calculationand post-processing software.