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一、问题的提出对于厚度在0.8米以下的极薄矿脉的开采,为了保证行人和操作方便,为了顺利地放矿,都不可避免地要采一些围岩.因此,合理地确定极薄矿脉最小采幅,便成为开采这类矿脉的一个十分重要和现实的问题.对于缓倾斜极薄矿脉的采幅计算,过去沿用的公式在应用上有一定的局限性.并且都没有直接考虑采空区内放矿溜井的具体影响,在应用上不够方便.尤其是对采空区的充填系数K_充与什么有关;怎样确定;随着
I. PROBLEM PROBLEMS For the mining of ultrathin veins with a thickness below 0.8m, some rock mass is inevitably taken in order to ensure pedestrians and ease of operation, therefore, it is reasonable to determine the minimum and minimum veins As a result, there are some limitations in the application of the formulas used in the past, and no direct consideration has been given to the gob area It is inconvenient to apply in the application of the specific effect of the ore discharge well, especially for what is the filling factor of the goaf; what should be determined;