A.5~10 B.10~15 C.10~20 D.15~20
A.50~100 B.100~200 C.150~250 D.200~400
A.地形起伏、剥离层与有用层厚度有变化的料场 B.地形平缓、有用层厚度较稳定的料场 C.勘探网(点)布置不规则的料场 D.地形起伏、勘探网(点)布置不规则的料场
A.200~300 B.100~200 C.50~100 D.<50
A.10 B.20 C.30 D.40
A.1000、200 B.1000、300 C.1200、200 D.1200、300
A.10%~30% B.10%~40% C.15%~40% D.15%~45%
A.1×10-3 B.1×10-4 C.2.5×10-4 D.1×10-3
A.5%~10% B.6%~12% C.7%~14% D.8%~15%
A.1% B.2% C.3% D.5%