Study on optimization of structural parameters for deep stope in Gaofeng mine based on numerical simulation

Upward horizontal slicing and filling non-pillar continuous mining will be going to used in medium thick steeply inclined orebody of Gaofeng mine in order optimum stope structural parameters,preventing ground pressure hazard and ensuring deep mining safety.In this paper the four parameters including ore block length,slice height, artificial pillar width and pre-slicing layer number are studied by orthogonal methods and then analyzed through numerical simulation.In addition,extreme difference analysis was used to investigate the stop roof mechanics state of different parameters.The research shows that slice height is the most important influence factor of stope roof pressure concentration and plastic failure.The other parameters are also very important and should also be thought in the stope design.