- 责任者：Zhang Xuyu (No.717 Geological Team ; Northwest Nonferrous Exploration Bureau ; Baoji 721015 ; China) ; Li Yinlao
- 刊名：Geology of Shaanxi
- 出版年：2013
- 卷期：31(2)
- 关键词：铜矿 ; copper ores ; 采矿 ; mining ; 陕西 ; Shaanxi Province
- 页码：p.27-32
- 图表：3 illus., 9 refs.
- 分类号：1001
- issnNo：ISSN1001-6996
- isbnNo：CN61-1150/P
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The Tongyu copper deposit is attributed to volcanic pyrrhotite-pyrite type deposit, which is characterized by ore body more in number, small in size, low in ore grade, big changes in thickness and complex in shape. The relationship between ore bodies and wall rocks are of gradual transition, resulting in dilution easily when mining. In addition to delineation and mining relying on different thickness of ore bodies, unconventional method of extraction, opening （along the bottom of ore body undercutting and cutting） - ore room formation - kerve in ore room at a certain spacing - final construction of transport tunnel at the footwall of ore bodies - mining in conventional method of extraction, has been used and effectively reduced ore dilution rate, resulting in the economic profit of the mine raised.