Study On The Safe Mining Under Buildings In Cedihe Coal Mine

The ground involves the building with the quantity, the type of complex, dense,built thepolicy bottom coal under etc. Research mning under buildings is of great significance for themitigation of coal mining succeed tense contradiction longwall continuous mining, improvethe mine resource recovery rate and the socio-economic benefits.In this paper, based on the analysis of the conditions of the coal mine geological andmining conditions, building conditions, production technology and equipment. Calculate andanalyze the practicality and feasibility of leaving in the protection pillar, cut and fill mining,the maximum height of the jump mining (the wide strip mining), four buildings on the surfaceof strip mining protection mining methods. Finally, the mining method of continuousadvancing working face transition under buildings by the long wall working face faces band.According to the mining overlying strata structure and coal seam occurrenceconditions.Application of pressure for theory and A.H.Wilson three stress method of coalpillar design theory. Comprehensive analysis of strip mining scheme of mining width,retaining width. Combined with FLAC3D numerical simulation software, on a molar-Kulunfor the constitutive model, strip coal pillar stability is analyzed. The calculation results showthat retention strip coal pillar has enough support strength and long-term stability. Minedoverlying strata movement and deformation will not cause the sinking of surface waves. At thesame time to the whole basin ground movement and deformation based on probability integralmethod. Buildings confirmed mining the scope of protection of surface movement gently.Theground movement and deformation in grade damage range. Determination of strip miningscheme can effectively protect the normal use of the surface buildings securityDetermination of strip mining plan and policy bottom river coal existing productiontechnology conditions to adapt, countermeasures of coal mining under buildings bottom town has a certain reference value.