Reporting on the results of lead-zinc ore exploration in Lang Ray - Nui Ngang area in Cam Nhan and My Gia communes, Yen Binh district, Yen Bai province, Mr. Nguyen Phuc Tu from Mining - Geology Technology Implementation Consulting Joint Stock Company, the consulting unit, said: Hydrogeological - engineering geological work has clarified the hydrogeological - engineering geological characteristics of geological formations present in the research area; at the same time, calculating the expected amount of water flowing into the mining pit and the pressure on the roof and walls of the pit, the stable slope angle of the open-pit mining pit bank, as a basis for the work of establishing investment projects and designing mining operations later.
According to Mr. Tu, the investor (Tay Giang Yen Binh Mineral Joint Stock Company) needs to soon have a plan to put the mine into operation, to rationally use valuable and high economic resources in Yen Bai province.
Deputy Minister of Natural Resources and Environment Tran Quy Kien and the Council members unanimously approved the total reserves and resources of lead-zinc ore grade 122+333 as 202.1 thousand tons, equivalent to 7,422 tons of lead-zinc metal. According to the Deputy Minister, if choosing the underground mining option, the investor must pay attention to the addition of hydrogeological and engineering geological assessment works to ensure the reliability and safety of the future mining design.
Reporting on the results of the exploration to expand the limestone mine for cement raw materials in Ninh Dan commune, Thanh Ba district, Phu Tho province, Mr. Le Van Huan - Sao Dat Viet Consulting and Investment Joint Stock Company, the consulting unit, said: The exploration work has clarified the geological structure of the mine and the distribution characteristics of limestone bodies for cement raw materials, limestone bodies containing clay and shale for cement additives; rocks for construction materials and fill soil in the exploration area.
Furthermore, the collected data ensure sufficient basis for evaluating the mineralogy, petrology, chemical composition, physical properties and technological characteristics of limestone for cement production in the exploration area. The characteristics and petrology, chemical composition, physical properties show that clay-bearing limestone and black shale at Ninh Dan mine, Ninh Dan commune, Thanh Ba district, Phu Tho province can be used as cement additives for Vicem Song Thao cement factory.
The exploration work also clarified the hydrogeological and engineering geological characteristics and mining conditions. The documents are sufficient for designing and mining using the open-pit mining method.
For this mine, the National Mineral Reserves Assessment Council has approved the reserves of limestone for cement raw materials at level 121 + 122 of about 21.9 million tons; reserves of clay-bearing limestone and black shale as additives of more than 1.6 million tons; accompanying minerals including clay-bearing limestone and black shale for common construction materials at level 122 of more than 6.4 million m3.
Reporting on the results of the exploration to upgrade the reserves of limestone for cement raw materials at Ang Dau and Ang Rong mines in Minh Tan town, Kinh Mon district, Hai Duong province, Mr. Le Van Huan said: The exploration work has clarified the geological structure of the mine and the distribution characteristics of the limestone body for cement raw materials and the dolomitized limestone body in the two exploration areas.
The collected documents ensure sufficient basis for assessing the mineralogy, petrology, chemical composition, physical and mechanical properties and technological characteristics of cement production in the exploration area; and are reliable enough to calculate reserves of levels 121 and 122 for limestone and dolomitized limestone.
Deputy Minister Tran Quy Kien and members of the Council approved the total reserves of limestone for cement raw materials at Ang Dau mine and Ang Rong mine at levels 121 and 122 of about 17.5 million tons; the total reserves of dolomitic limestone for inert additives at Ang Dau and Ang Rong mines at levels 121 and 122 of about 8.1 million tons; the total reserves of dolomitic limestone for construction materials at this mine of about 14.4 million m3.
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