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Increase the height of the stage of ore block caving mining method


Method of the physical model in laboratory experiments, the four groups of experiments are as follows: 1. Evenly through the mouth of the order cone ore ore ore recovery rates determined at the time | 102. 4 ore to determine when the roadway can not be used only when the release of 45 ore ore recovery, 3. Ore to determine when the five roadway can not be used when the release of 75 mineral ore recovery,[link widoczny dla zalogowanych], 4. Through a rectangular trench ahead of the ore to determine when control of ore recovery. Experimental test data of stars in Table 1. Huan 1 Experimental ore block at the end can not use a roadway can not lose lean ore went to the Ministry of the structure of groups of ore Lane eyelashes before the release of the empty road with a number of the amount of ore I put 010,[link widoczny dla zalogowanych],096 mines ()()(: I Hau Road Cone 2 Ibid 44517tO3 Ibid 5751492,3 group, the average 15.59.E4 tapered rectangular cut scouring and O10013 ore ore port in the roadway under normal working conditions of mine even put the order (group 1 test), the loss rate and dilution rates of ore ahead of the other IJ lower than 4 and 2. But with the first group of tests, the average results of 2,3 compared to when individual ore IZl closed, the experimental group 4 of ore loss and dilution rates were less 2.5% and 1.5. Therefore, the high mineral block rectangular trench ahead of the ore system, its better than the cone recovery index of ore ore ore port. When using 150 to 170 meters height of the mining of ore blocks, the a release of mineral ore port increased 1-fold, the rectangular trench ahead of the ore process is common ore hopper with trench can not be compared. In 1988 the Moscow Institute of Mining experts and molybdenum, \m level of the block № 1 mine design, mine block height of 160 meters, ahead of rectangular trench ore. test mandatory block caving mine the technical and economic indicators are listed in Table 2. In order to compare mine too highly the mining process block economic benefits were calculated, rectangular trench confirmed the order of ore ahead of the benchmark 10-wide atlas 2 8 National nickel industry enterprises. I9 q high degree of design institute, rn ore block industrial reserves, million t Lok said, death, m / thousand t nugget productivity, thousand t, workers face on labor productivity, per meter excavation works out of ore,[link widoczny dla zalogowanych], t86 years, the company's designer Teerneiao Walled plated j drive 75. suddenly crop Bo 10O228.22.2854 MG .5188.3 d43.0 ore loss rate, 121,210.7} 【. ore dilution rate,% I20l7114.7 program segment can be mandatory to ensure balance of Caving 1 ton of ore reserves in the profits than 2 rubles. By increasing mining, metal recovery and reduce the cost of making the mine the validity of the basic block design can be guaranteed. Under the new program with existing programs to determine calculated cost difference between shaving profit of 0.61 rubles / Sa. current quasi ore block has been end, making room off the ore mine. UBeTHa ~ MeTa Ⅱ Ⅱ yprHH, 1989,[link widoczny dla zalogowanych],9,5 ~ 8 (Jiang Chao Zhou Kai) Le Star uranium shipment plug hole blasting and practice of Namibia's uranium deposits located in the Caribbean coastal city of stars Swakopmund about 70 km northeast, in the poor regions in the Namib Desert. In 1966, detailed exploration, after a feasibility study in 1970 and completed during this period the mining plan and preliminary design of the plant. In 1973 decided to exploitation, according to the start the construction of mills and factories. At present, Le Star mine is the world's major supplier of uranium nuclear power. Since 1976, 0 month to produce the first batch of uranium Mighty, the mine to consider using to increase productivity and reduce costs of new technologies. the actual situation,[link widoczny dla zalogowanych], weekly mining ore and waste rock out of the reach nearly i00 million tons of all planned capacity (to be taken out of 5DOD tons). mine is mine sector accounted for a maximum total of 740 people. these people about half of mine, mainly equipment operator. pit level 1 m high, the equipment used for conventional vanadium rope shovel and cars. containing uranium ore sent to the crushing machines, mines and waste rock storage site were Outside the field of open pit mine. mining costs account for the total cost of uranium production (including metallurgy and others) 36. Currently, the service life of the mine is expected to be at least 25 years, during which the open pit will be 3,000 meters long, 1,600 meters wide, 460 m deep. perforation perforation team has a total of 6 sets of GardnerDenverGDi20 electric rotary drill. in the mining sections of hard rock, the production hole layout for the 9 × t0 m, bottles in the soft rock Ⅲ is a 14 × 14 meters. cannon hole diameter 381 mm, deep l8 meters, including ultra-drilling 3 meters. drill diameter of 341 mm from the two long connections from the 1O meters. The standard three-cone drill diameter 38l mm) diameter drill pipe with the same I.5 m connecting rod with the drill pipe connection. Le Star mine tried a variety of drill bit. now: 73 Dan. m
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