Filler must be well filled in order to minimize the gap, good contact between a single block of stone, as much as possible to fill in tight, stone cage to reduce the possibility of moving the stone.
填料必须填写，以减少差距，一块石头之间的良好接触，尽可能填写紧，石笼减少搬石头的可能性。
2
After the blasting, the block must be moderate, the bulk rate must be within 7%, can meet the shipment operating machinery, can requirement for roadbed filler.