Study Of Deformation Mechanism And Supporting Technology Of Large Section Chamber Surrounding Rocks In Oxidation Zone

In order to analyze the deformation mechanism of soft rock and resolvesurrounding rock supporting puzzle in oxidation zone, this dissertation had conductedSEM tests and lots of mechanical tests of soft rock, and conducted theoreticalcalculation of supporting scheme, then conducted numerical simulation on supportingschemes. By SEM tests, the microstructure of soft rocks were observed, and then themineral species and contents were analyzed by X-diffraction tests. The point load tests,uniaxial compressive tests and triaxial compressive tests were conducted on soft rocksof Pangpangta mine oxidation zone, and the mechanical properties of oxidation zonesoft rocks were gained. For the component characteristics of surrounding rock, thebolt-shotcrete support scheme was adopted, and the theoretical model was calculatedand the supporting parameters were gained. The bolt-shotcrete models were simulatedby FLAC, and the stress distribution and deformation properties were analyzed. Fromcomparison of several supporting schemes, the supporting parameters of theoreticalmodel is the optimal, and the values were consistent with measured values, thus thedeformation rule of Pangpangta mine surrounding rocks were revealed.