Study On Goaf Strata Stability Prediction Of Steeply Inclined Coal Seam

In view of the following in the mining of deeply inclined coal seam, underground forms alarge area of goaf, and instability of strata of the goaf evolves into dynamic disaster accidenteasily. This has caused very great influence to the people’s life and the safety operation of themine. So accurate prediction is very important on the deformation, failure characteristics andstability of the strata of the goaf. At the same time, people can make the treatment scheme ofgoaf according to the accurately predict results.This thesis, taking Xinjiang Wu Dong mines+640level43#coal seam working face andgoaf stability of overlying strata and surface subsidence as the research object, combined withthe regional geological background and geological survey results. The application of physicalanalog simulation experiment, analysis of working face goaf strata movement regularity in theprocess of mining,"three zones" variation characteristics, and whether filling the goaf in timecan slow down the roof subsidence, to prevent roof fracture and the effect of overburdenfracture; And selecting the advanced SIR-20geomagnetic spectrum apparatus of thegeological radar detecting technique, accurately detect the goaf existed in the overlying rockhole and the position of the aquifer is located; Then based on the finite element numericalsimulation, choosing a suitable constitutive model, its premise is to take different scales,different load model experiment research methods, damage quantitative analysis andprediction research, analysis of deformation and failure characteristics of goaf and the normalstress distribution and displacement field evolution characteristics of rock mass; finally,through the different location of the goaf strata characteristics, optimization of harnessingscheme is established.It can establish a set of "expected-analysis-identification-monitoring-governance" systemabout instability and failure of the goaf strata more scientifically, to strengthen scientificresearch and monitoring and control of the stability of goaf strata.