Method for mining flat dipping ultrathin sedimentary type subterranean iron ore deposit
A mining method and deposition-type technology, applied in underground mining, surface mining, earth-moving drilling, etc., can solve the problems of large amount of mining and cutting works, low production efficiency, waste of resources, etc., so as to reduce engineering costs and improve resource recovery rate. , the effect of shortening the construction period
Inactive Publication Date: 2014-08-13
UNIV OF SCI & TECH BEIJING
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[0004] The purpose of the present invention is to design a mining method that can simplify the mining process and improve resource recovery in view of the problems of low production efficiency, large mining and cutting engineering, and serious waste of resources in the mining of gently inclined ultra-thin iron ore deposits in underground mines It can also reduce the amount of mining and cutting engineering, shorten the construction period, reduce the cost of the project, and improve the efficiency of ore transportation
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[0015] An iron ore deposit belongs to the Devonian "Ningxiang-style" marine sedimentary hematite deposit. The ore body is layered, with a dip angle of 8°-10°, an average thickness of 3.74m, a strike length of 14km, a width of 4-6km, and a sandy roof. Shale, the floor is quartz sandstone, with good stability; the ore type is oolitic hematite, high in phosphorus and low in sulfur, which belongs to a typical gently inclined extremely thin and difficult-to-mine iron deposit.
[0016] The mining method of the long-wall hydraulic support roof protection is used to recover the ore deposit, and the specific parameters are:
[0017] (1) Starting from the transportation roadway in the footwall, the cutting roadway is arranged along the inclination to communicate with the return air trough, and the roof of the working face is supported by hydraulic supports. The distance between the supports and the supports is 0.5-3.5m. The distance is 4-10m. The initial working resistance provided by ...
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The invention discloses a method for mining a flat dipping ultrathin sedimentary type subterranean iron ore deposit, which belongs to the field of mining engineering. The method comprises the following steps of: 1, arranging hydraulic supports (2) along the dipping direction, wherein the distance between every two supports is between 0.5 and 3.5 meters, and the distance between each support and the front working surface ore body is between 4 and 10 meters; 2, strengthening roof surrounding rocks by using resin rock bolts (1) and metal meshes (5); 3, forming parallel blast holes (3) along the stopping direction, and blasting layer by layer when the thickness of an ore body is more than 3 meters, wherein the stopping width is between 5 and 10 meters, and the blasting altitude of a thinner ore body is the thickness of the ore body; and 4, transporting caved ores by using electric scrapers (4), transfer conveyors and rubber belt conveyors (6) jointly. The method for mining the flat dipping ultrathin sedimentary type subterranean iron ore deposit has the characteristics that: the mining process can be simplified, the resource recovery rate can be improved, the engineering work load of mining preparation and cutting can be reduced, the construction period can be shortened, the engineering cost can be reduced, and the ore transporting efficiency can be improved.
Description
technical field [0001] The invention belongs to the field of mining engineering, in particular to a mining method of a gently inclined ultra-thin sedimentary underground iron ore deposit. Background technique [0002] Iron ore is an important raw material for iron and steel production enterprises. As my country's iron ore resources are decreasing day by day, some complex and difficult-to-mining iron ore resources have become the mining targets of mining enterprises. An iron ore body has a slow inclination angle, thin thickness, And it is rich in phosphorus, which belongs to a typical gently inclined extremely thin and difficult-to-mine iron ore deposit. At home and abroad, there are few studies on how to mine such iron ore deposits. Usually, the methods of mining underground mines mainly include room and pillar method, caving method and filling method. Using the traditional three methods to mine gently inclined ultra-thin iron deposits has the disadvantages of low production...
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IPC IPC(8): E21C41/16
Inventor 宋卫东徐文彬杜建华
Owner UNIV OF SCI & TECH BEIJING