大河铜矿是开采处在挤压破碎带内的具有分枝复合、膨大缩小、沿走向及倾向均呈波状的产状复杂的多金属矿床。矿体厚度0.2～6.0米,平均2米,倾角60～80度,两侧均有发育的滑动面,矿体揉皱、破碎、错动明显。两帮围岩片理发育,稳固性差。因此,给开采带来很大困难。初期采用浅孔留矿法回采,但 The Dahe copper mine is a complex polymetallic ore deposit with branching compound, expanding and contracting, wavy along the strike and trend in the crushing zone. Ore thickness of 0.2 to 6.0 meters, an average of 2 meters, dip 60 to 80 degrees, both sides of the development of the sliding surface, the crumpled ore body, broken, obvious dislocation. Two sets of rock film management development, poor stability. Therefore, it is very difficult to mine. Initial shallow shallow retention mining method, but