嫩江市铜山铜矿工程地质特性及地下开采稳定性研究

Study on Engineering Geological Characteristics and Underground Mining Stability of Tongshan Copper Mine in Nenjiang City

铜山矿所处大地构造位置为大兴安岭地槽褶皱系东段罕达气褶皱带的西部,铜山矿矿床走向为280°~310°向南西倾,铜平均品位0.54%,属规模大但品位低的厚大矿床,采用无底柱分段崩落法开采,工程地质条件复杂。根据地层、构造、岩性、岩石风化程度,共划分五个工程地质岩带、九个工程地质岩组。铜山矿属块状岩类中等工程地质类型矿床。分别对Ⅰ号矿体露采边坡稳定性,Ⅱ号矿体地下井巷围岩稳定性,断层突水影响进行评价,并对地下采场稳定性分析,研究结果为矿山安全生产提供重要的地质依据。

Tongshan Mine is located in the west of Yanda gas fold belt in the eastern section of the Greater Hinggan Mountains.The direction of Tongshan deposit is 280°~310°southward,and the average copper grade is 0.54%.It is a large scale but low grade thick deposit,and the bottomless column section collapse method is adopted,and the engineering geological conditions are complex.According to the stratum,structure,lithology and rock weathering degree,there are five engineering geological rock belts and nine engineering geological rock groups that are divided.Tongshan Mine belongs to the massive rock type of medium engineering geological type deposit.The stability of open mining slope of no.I ore body,the surrounding rock stability of underground well roadway and the impact of fault water are evaluated,and the research results provide important geological basis for mine safety production.