Dynamic simulation study on protective coal pillar width on floor roadway

Determination of reasonable protective coal pillar width has a great significance for the safety and stability of the coal seam working face and the surrounding structures and facilities. For studying the reasonable width of protective coal pillar, based on the platform of ABAQUS, program with the PYTHON language to make dynamic model which can simulate the dynamic changes of different width. Then, the deformation law of floor roadway under different protection coal pillar width is analyzed. The finite element optimization analysis program is compiled based on MATLAB, and the minimum deformation of roadway and protective coal pillar is used as the optimization goal to make calculation for the dynamic model, and the reasonable width of protective coal pillar is proposed. The optimized coal pillar width (37.65 m) can ensure the overall stability of roadway and coal pillar by comparing of the calculated results between the designed value and the optimization value of protective coal pillar width. Through the comparison between the simulation result and the field monitoring data, validity of the calculation result and rationality of the method are verified. The parametric modeling and optimization analysis method proposed in this paper can greatly improve the efficiency of finite element analysis, which provide certain reference significance for similar engineering.