小寺沟铜矿经国家计委批复,在原矿山规模250(吨/日)的基础上,扩建为3000(吨/日)的我国第一座地下无轨设备开采的试验矿山。于1975年6月1日破上施工,经四年基建,于1979年7月投产。投产初期,铜的可选性差,同收率仅达30～40％,经济效果不佳。1980年转产钼矿开采,获得了较好的经济效益。一、矿山的概况 The Xiaosigou Copper Mine was approved by the State Development Planning Commission and expanded to the test mine of the first underground trackless equipment exploitation in China on the basis of the original mine scale of 250 (ton / day). On June 1, 1975 breaking construction, after four years of infrastructure, put into operation in July 1979. Initial production, poor copper selectivity, with the yield of only 30 to 40%, poor economic results. In 1980 the conversion of molybdenum mining, access to a better economic benefits. First, the general situation of the mine