开采饰面花岗岩,要找寻原岩荒料产出率高的矿床。该项指标可通过荒料体积P与花岗岩原岩体积Q之比求出: K=P/Q=P/(P+V) (1)式中:V——花岗岩尾矿(碎石)的体积。目前,K≥0.2的矿床都进行工业开采。但在该值下经济效果不理想,从而使得许多采 Mining veneered granite, looking for raw rock blocks high yield of deposits. The index can be calculated from the ratio of block volume P to the original rock volume Q of the granite: K = P / Q = P / (P + V) (1) where V is the ratio of granite tailings volume. At present, K ≥ 0.2 deposits are industrial mining. However, the economic effect at this value is not ideal, which makes a lot of mining