Non-uniform settlement or collapse of overlying rock is caused by open stoping mining of bauxite,and the integrity of overlying coal seam is destroyed.In order to understand the protective min-ing of coal and aluminum resources and ensure the integrity of the overlying coal seam during the mining of aluminum under coal,this paper analyzed the influence of the properties of caving particles on the u-niform settlement of overlying rock which adopted the proposed mining method,and the basic principle of the uniform settlement control technology of overlying rock.Firstly,the nonlinear elastic foundation beam mechanical model of overburden movement in aluminum mining under coal was established,and the mechanical model was analyzed under different elastic foundation coefficients.Then the numerical simulation method was employed to study the influence of the properties of caving particles on the over-burden movement.Finally,a technical scheme for uniform settlement control of overlying rock in alumi-num mining under coal was proposed and applied to industrial test.The research results showed that the large elastic modulus of caving body effectively controlled the settlement amount of overlying rock,and the elastic foundation coefficient was a key factor to control the uniform settlement of overlying rock.The block stope caving operation was an effective technical means to control the uniform settlement of o-verlying rock,and the dense consolidated filling was more conducive to controlling the uniform settle-ment of overlying rock.
关键词
煤下铝开采/崩落散体/非线性弹性地基梁力/数值模拟/覆岩沉降控制
Key words
aluminum mining under coal/caving loose body/nonlinear elastic foundation beam force/numerical simulation/overburden settlement control
维普
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