Method for constructing steel bar concrete bottom pillars for space mining process for middle thick mine body
A technology of reinforced concrete and mining methods, which is applied in ground mining, underground mining, special mining, etc. It can solve the problems of narrow underground construction sites, inability to mechanize construction, and complicated reinforced concrete construction processes, so as to reduce mining losses and reduce Dilution of mining loss, improvement of ore grade and the effect of enterprise benefits
Inactive Publication Date: 2003-06-18
广东金鼎黄金有限公司
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The disadvantage is that the reinforced concrete construction process is relatively complicated, and the underground construction site is narrow, so it cannot be mechanized
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[0010] In the 3741 stope of the middle section of 110 in the Yunxi mining area of Gaoyao Hetai Gold Mine in Guangdong Province, there is a section of about 20m long rich ore bag with an average grade of 25.72g / t. The implementation steps are shown in the figure: (1) Stope cutting and construction artificial bottom pillar; 2) Mining in this stope; (3) The end of mining in this stope and the end of top column mining in the corresponding lower stope. Constructing a 5m×40m artificial bottom column requires about 60-120m of concrete 3 , average per m 3 The cost is 350-550 yuan, and it generally takes about 10-20 days to lay anchor rods, lay steel bars and pour concrete.
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A method for constructing artificial sill with reinforced concrete for the open-stop mining method of middle-thickness ore body includes such steps as mining all ore in the 30-60 m X 3-10 m of range, spreading ore on horizontal floor to form a 0-20 deg of slope, spreading an anti-leakage plastic film, casting with reinforced conrete, welding the reinforcing bars to anchor rods, and constructing reinforced concrete beams at intervals of 4-10 m.
Description
Technical field: [0001] The invention belongs to the technical field of rock gold ore body mining in metal ore deposit mining, and in particular provides a method for constructing a reinforced concrete artificial bottom column by a medium-thick ore body open field mining method. Background technique [0002] The shallow-eye mining method is developed in the upper and lower stages (or the middle section) and after production prospecting and clearing of the ore body mining technical conditions, according to the stability of the ore rock, several ore blocks are divided on the length of the ore body. The length of the ore block is generally 40-50m, the height of the middle section is 35-60m, the horizontal thickness of the ore body is 3-15m, and the inclination angle of the ore body is greater than 55°. Before the mining of the ore block, the ore room and the ore pillar are first divided, and the ore pillar includes the bottom pillar (3-5m thick), the top pillar (3-5m high) and ...
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IPC IPC(8): E21C41/22
Inventor 姚香孙胡东陈友东
Owner 广东金鼎黄金有限公司