成人免费无码大片a毛片小说-久久久精品94久久精品-久久久久久久久久久久一区二区-国产成熟女人性满足视频-男女午夜啪啪-国产精品第一国产精品-日韩123区-亚洲中文字幕日产乱码小说-欧美性一区二区-亚洲精品国偷拍自产在线观看蜜桃-www.色综合-久久精品国产99国产精品亚洲-日韩一区二区三区精品-亚洲人成一区二区-精品久久久久久亚洲综合网站

As the main creation of Chinese mine engineering technologies, ENFI has been leading the development of Chinese mine engineering technologies, and remains a leading position in Chinese metal mine area with continuous technological innovation and engineering practices. In the long-term researches and design practices, ENFI developed leading specialized techniques such as block caving method, high concentration and paste filling, deep-shaft mining technique, large-hole mining technique, underground high intensity mining technique, combined open-pit and underground mining technique under complex conditions, super-large open-pit comprehensive mining technique, intelligent mine management system, large-scale blasting system, "semi-autogenous milling + ball milling" technique, carbon-in-pulp gold recovery technique, multi-metal beneficiation technique and long distance pipeline transportation. ENFI has been granted with about 300 national, provisional and ministerial level scientific-technical progress awards as well as several hundred patents.

For over 60 years, ENFI has undertaken the design of mineral resource bases in China, and provided excellent technical services for the development and construction of over 400 mines around the world. ENFI has designed the first mine with block caving method in China, the first mine with non-waste mining, the first mine with submarine mining, the first underground trackless mine, the first potash mine with pit mining, the first mine with paste filling, the first mine with large-scale consolidated filling of total tailings, the first mine with large-diameter deep-hole mining, the first large kilometer deep mine, the mine with the most complicated mining conditions, the largest capacity copper mine, the largest capacity and deepest mining molybdenum mine, the largest capacity and deepest mining iron mine, as well as the largest capacity open pit etc.