Study on Transportation and Mechanical Properties of Full Tailings Cemented Filling Body in San'an Iron Mine
In order to ensure the safety of filling and reduce the cost of filling in San'an Iron Mine,the slurry conveying performance and the strength performance of filling body with different slurry concentration and lime sand ratio are analyzed by comprehensive design test.The test results show that the flow rate of slur-ry varies from 0.096 to 1.625 m/s,the yield stress is from 2.206 to 24.687 Pa,the viscosity coefficient is from 0.314 to 6.049 Pa·s,and the slurry concentration is from 58%to 62%when flaw better overall perfor-mance.Using M32.5 cement as cementing material,the ratio of cement to sand is 1∶8,the concentration of slurry is 66%,and the compressive strength of 60 days is 0.61 MPa,which is basically difficult to meet the requirements of mining.However,using cementing powder,the ratio of cement to sand is 1∶15,the concen-tration of slurry is 66%,and the strength of 60 days can reach 1.9 MPa.It can adapt to the filling require-ments of different areas in many mining methods.The research results provide a theoretical basis for similar mine filling slurry ratio design.
filling miningconveying performancecompressive strengthcemented filling body
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