缓倾斜薄至中厚磷矿体露天转地下开采技术研究进展

Progress of research on mining technology for transition from open-pit to underground mine of gently inclined,thin and medium thick phosphate rocks

以云南磷化集团有限公司晋宁磷矿2号与6号坑口、尖山磷矿、昆阳磷矿4采区深部矿体为工程背景,针对缓倾斜含软夹层薄至中厚矿体露天转地下开采这一技术难题,通过采矿工艺创新、技术革新与完善,研究适合于此类矿体开采技术条件的新工艺和新技术。相关的研究成果对我国大量类似赋存条件的磷矿资源的开采具有重要的指导意义。

The paper takes deep geological specific mining con- ditions of the deep orebody in Jinning Phosphate No. 2 and No. 6 pithead, Jianshan Phosphate and Kunyang Phosphate No. 4 pit- head of Yunnan Phosphate Group Co. , LTD. , as engineering background. For the recognized technical problems in mine indus- try of the mining technology for transition from open-pit to un- derground mine of gently inclined, thin and medium thick phos- phate rocks with soft interlayer, the new process and new tech- nology that are suitable for mining technical conditions were stud- ied and exploited by way of technical innovation and improvement of mining technology. The related research achievements not only has important economic environmental and social significance to Yunnan Phosphate Chemical Group Co. , LTD. , hut also has a great significance to guiding and improving the large amount of phosphate rock resources with similar occurrence conditions in China.