SU1314060A1 - Method of combination mining of mineral deposits - Google Patents

Abstract

The invention relates to the mining industry and allows for greater development efficiency by reducing the costs of stripping work. The deposit is opened and its upper part is taken out by layers of open-cast mining with the creation of 3 working sites (RP) 4 and ledges on the working board. Before excavating the mineral from the working side 3 of pit 1, open insulated chambers form a total height (hoi -} - hn) equal to the height from the mark of RP 4 to the maximum design mark of the bottom 5 of the pit (hoi) and the height of at least one underground floor ( hn Formation of chambers is carried out by drilling and blasting operations. After carrying out blasting operations and blasting of minerals, partial repulsed rock mass (GM) 6 is released from chambers to underground workings up to the design limit mark of the bottom 5 of the open pit. Tanning space is filled with overburden rock to the RPM 4 mark. As each layer is excavated, a substage of broken GM 6 is made to the height of the layer. When open mining reaches the design limit of the bottom 5 of the open pit, the broken GM 6 is filled out of the chambers and marks. Then the interchamber pillars under the bottom 5 of the quarry are extracted using the underground method. 4 ill. (O (L / 77-77777. with NU O 05 about physical. 7

Description

The invention relates to the mining industry and can be used in open pit mining of minerals under the sides and bottom of quarries.

The aim of the invention is to increase development efficiency by reducing the cost of stripping work.

FIG. Figure 1 shows chambers filled with broken ore; in fig. 2 - the same, filled with overburden rocks and broken ore; in fig. 3 is a diagram of the production of broken ore and filling of the developed space with chambers with overburden rocks at the stage of completion of open works; in fig. 4 - chambers filled with complete overburden.

The method is carried out as follows.

The upper part of the deposit is removed in layers by the open method. As pit 1 deepens, a number of technological and economic difficulties arise associated with the transportation and storage of winter rock. At the next stage of deepening of pit 1, the occupation of the area around the pit increases, which leads to an increase in the distance and, accordingly, the cost of transporting overburden rocks to external dumps. The formation of the worked-out space after the completion of the overburden works in the quarry, for example, the penetration of chambers from the bottom of the quarry, does not lead to the desired results, since practically the entire volume of overburden rock is placed in external dumps. In this connection, in order to place the overburden earlier in the mined-out space and shorten the transportation distance, open chambers 2 are formed from the working side 3 of the pit. To do this, in safe areas of work sites 4, to a total height (Ne - | - + hn), equal to the vertical distance from the working platform mark to the maximum project bottom mark of 5 quarry (hoi) and the height of at least one underground floor (hn ), form open chambers 2. Chambers 2 are formed by drilling and blasting with the use of deep drilling machines. For blasting minerals use the method of sectional blasting from the bottom up. For excavation of open chambers 2, the option of advancing the on-board quarry 3 from the rising horizontal wells and their sectional blasting can be used. After blasting and blasting of the mineral, partial repulsed rock mass 6 is discharged to the design limit of bottom 5 of the quarry. Formed developed chamber spaces 7

filled with overburden 8 from the working side 3. The chambers 2 are filled with dump trucks or wheel loaders. Chambers 2 fill the overburden 8 to the level of the working sites 4 of the quarry benches being worked out. Then, as the layers are dredged and the quarry excavator approaches the chamber 2, a sub-release of ore is made to the height of the mining layer. As the overburden is developed in the process of mining, additional output of broken ore is effected by the amount corresponding to the volume of open-pit rock. Upon reaching open-pit mining, the maximum design grade of the bottom of the 5th open pit

5, the remaining part of the unreleased mineral 6 is completely released, and the developed spaces are filled with overburden 8 to the bottom 5 of the quarry, and then the interdigital pillars 9 under the bottom of the quarry are removed by the development system with the hardening tab 10.

Claims (1)

Invention Formula Combined development method 5 mineral deposits, including the opening of the deposit, layer mining of minerals by open-pit mining, creating working platforms and ledges on the working board, the formation of open insulated chambers below 0 bottom of the quarry mine blasting of minerals with the formation of interchamber pillars, the release of broken rock mass from the chambers to the underground workings, filling the chamber’s exhausted space with overburden rocks and extracting interchamber pillars, characterized in that costs of open work, the chambers form before excavating the mineral from the working side to a total height equal to the height from the level of the working platform to the maximum design mark of the bottom The pit and the height of at least one underground floor, then simultaneously with the partial release of the broken rock mass from the chambers to the maximum design grade of the bottom of the pit, fill the resulting developed space with overburden to the mark of the working platform and as they are dredging each layer is produced. release of the broken rock mass to the height of the layer, and upon reaching 0 open-pit mining of the maximum design level of the pit bottom, the crushed rock mass is released from the chambers and the formed excavated spaces are replenished to the indicated mark, after which the outer pillars under the pit bottom are removed. 0 2 Fig.Z FIG A Compiled by A. Loginsky Editor M. BanduraTechred I. VeresCorrector M Sharoshi Order 2005/35 Circulation 455 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4