A method for designing support parameters of the transition support of the excavation joint in fully mechanical mixed offset mining

摘要

A design method for transition support sizing parameters of filling and fully-mechanized coal mining and mixed mining surface. First, obtaining a total length (L _total ) of a mixed work area and a length (L _filling ) of a filler section (1) corresponding to a coal mining production capability of a mixed mining work surface and a fill requirement of a working surface of the filler section (1); secondly, constructing a filling and fully mechanized number model for coal mining and mixed mining using 3DEC software (3D software) and performing an analog calculation on a cavity height H of a cover plate of a transition section (2) and a stress influence area S of the transition section (2), when different filling portions Φ of a mined area of the filling portion (1) change; on the basis of a numerical calculation result of the numerical value, fitting a curve according to a correlation coefficient R ² to obtain a functional relationship of the fillings Φ, the cave height H, and the stress-affected area S of the transitional section (2); and finally taking into account the actual engineering geological parameters and the design parameters of a transitional promoter (4). The process can help to provide references for structural design to facilitate the smooth transition from mixed processing to fully mechanized coal mining, to further enrich the coal mining industry and to expand the scope of the bottling coal industry.