SU1444521A1 - Method of combined mining of steep ore bodies - Google Patents

Abstract

The invention relates to the development of ores by the open and the underground method with separate excavation of rich and poor ores. The purpose of the invention is to reduce the cost of ore mining by increasing the depth of the quarry while selectively excavating rich and poor ores deposited in the side of the rich ore deposit. Simultaneous open and underground mining of ores is carried out. The opening and preparation of underground horizons are carried out by trunks and horizontal workings. In a quarry, ore is mined to the bottom of the mine. Upon reaching the bottom of the open pit in the process of excavation, the deposits of rich ores are cut in a block of poor ores in the latter than on the lateral side and deposits it on a recumbent side of deposits of rich ores, which are worked from top to bottom under the lowering block. The collapse of the overlying poor ores is carried out on the lowering block of the blast-off ledge of the pit. The production of poor ores is carried out through the development of underground horizons. Underground excavation of the ore is carried out with the collapse of the overlying mass. 2 Il.

Description

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The invention relates to the mining industry and can be applied in the joint development of rich and poor ores, such as rich iron ores and magnetite.

The purpose of the invention is to reduce the cost of ore extraction by increasing the depth of the quarry with the selective development of rich and poor ores, which are located in the side of the rich ore deposit.

Fig. 1 (a, b) shows the scheme of opening and mining of rich ores 1 and poor ores 2 by open pit 3 with the most economically beneficial traditional methods of depth 4, opening of underground horizons by barrel 5, cargo flows of rich ore 6, poor 7; in fig. 2a shows a section of block-ceiling 8, which is simultaneously a movable bottom of a pit, deep wells 9; in fig. 26 - the bulk of the poor ore 10, transported through the receiving underground horizons 11 in the limiting position of the quarry.

The proposed method is carried out in an eloquent manner.

FIG. Figure 1a shows the traditional development of the open pit 3, which extracts rich ores 1 and poor ores 2 to an economically viable depth. 4 Trunks 5 mines and horizontal workings of underground horizons 11 simultaneously pass. The rich flows of ore 6 and poor 7 have the same direction. FIG. 16 shows the achievement of the bottom of the quarry at the maximum depth of development and length in the wall than the side of the rich ores of the floating block - ceiling 8 from ore without ores. FIG. 2a shows the lowering of the ceiling 8 onto the recumbent block due to underground mining of rich ores with collapse systems, and then begin drilling deep wells 9 in the quarry. At the same time, mining of rich ores from above is carried out.

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Claims (1)

 down under the protection of the descending block-ceiling 8 and the breaking of ultra-high benches (up to 200-250 m) deep boreholes 9. The exploded poor ore 10 is placed on the movable bottom of the quarry. They are dispensed through the refined receiving horizons of 11 shafts. Finished ores are discharged through the underlying horizon. The drilling of blastholes from the quarry is carried out to the maximum possible depth. The breaking of high benches can also be carried out by mine charges. FIG. 26 shows the achievement of the maximum depth by the quarry (700-800 m) and a full transition to the underground method of development. Then the space developed is filled with overburden. Formula of the Invention A method of combined development of steeply dipping ore deposits, including simultaneous open and underground mining of rocks, opening and preparation of underground horizons with trunks and horizontal workings, mining of ore with ledges in the chamber to its bottom and underground excavation of ore with the collapse of the overlying mass, characterized in that in order to reduce the cost of ore by increasing the depth of the quarry with the selective development of rich and poor ores deposited in the side of the deposit of rich ores, When reaching the bottom of the quarry, in the process of excavation of ore, the rich ores are cut in a side of a block of poor ores, the block is moved to a lying side of a deposit of rich ores, which are rolled down from the bottom, and the collapse of overlying poor ores the quarrying is carried out on the quarry blasting unit i icTynoB, and the poor ores are mined through the development of worked underground horizons. -600 -too -800 -rooo