This paper gives the answers of national regulated scope of projection zone and problems of choice and conversion of the partial coordinate system suitable for the needs of mine diggings.

• 从分析矿区控制网际要求的长度变形容许数值入手,确立出适合矿区需要的,统一投影带的范围以及对局部坐标系统的选择和换算问题。