SU1701917A1 - Method of combined mining of deposits - Google Patents

Abstract

The invention relates to the development of steeply dipping deposits of valuable ores. The goal is to increase the productivity of drilling and blasting operations, improve the ventilation conditions of underground workings and reduce the loss of mineral resources. Within the boundaries of the quarry, the minerals are worked out with ledges, and the bottom of the quarry i within the boundaries of underground mines is developed by chambers of the first and second stages. Preparatory and rifled workings are made. Drilling naps of i-wells and making them offs. And, the removal of reserves by ledges lead to depths less than the design depth of the quarry to the height of one ledge. At the same time, the stocks under the bottom of the quarry were dredged with the first stage chambers with a bookmark. In the process of working out the penultimate step, the reserves of secondary chambers are drilled from the bottom of the pit. Then, the secondary chambers are recovered in layers in an exalted order by blasting the wells with parts and filling the developed space with hardening smilgm through the unexploded sections of the wells in the bottom of the open pit, after the solidification of the lower ledge of the open pit, blasting off the unexploded areas wells. 6 Il. h

Description

The invention relates to the mining industry and can be used in the development of steeply dipping deposits of valuable ores, the upper boundary of which is located near the surface, and the lower limit is located at a considerable depth.

The purpose of the invention is to increase labor productivity in drilling and blasting operations, to improve the ventilation conditions of underground workings and to reduce mineral losses.

FIG. Figures 1-6 show the stages of excavation of stocks with ledges and chambers of two lines.

The method involves the presence of open-cast mining 1 (excavation of reserves within the quarry with ledges), underground mining (floors) and underground transport horizon 2 below them, as well as, from: chambers 3 and 4, worked out with a hardening mixture.

The method is implemented in several etzchov Pass through preparatory and rifled workings. At the first stage (Fig. 1), open-pit mining of minerals is carried out to a depth less than the design depth of the quarry at a height of one.

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blunt, with simultaneous excavation under the pit of the quarry of primary chambers 3 using underground drilling equipment and their laying with hardening mixtures. At the next stage in the process of working out the penultimate ledge after the quarry reaches the level of 5. above the project floor to the height of one ledge, and after the primary chambers are solidified, parallel wells of secondary chambers 4 are drilled from the bottom of the quarry with 5 quarry machines 6. Depth of wells 7 is equal to the sum the height of the chamber and the mining ledge (Fig. 2 and 3). Next, stockpiling of secondary chambers with 4 layers is carried out in an upward order by charging and blasting wells with areas and discharging ore through underground workings (Fig. 4). At the next stage, the spent secondary chambers 4 are filled with a hardening solution, which is fed through the unexploded upper sections of the wells 7 (Fig. 5). The fourth stage involves the open pit mining of the lower ledge of the open pit 8 after the bookmark has hardened, using unexploded upper sections of the wells 7 for explosive crushing.

Claims (1)

Formula of the Invention Combined field development method, which includes excavation of mineral reserves within the quarry boundaries, excavation of mineral reserves under the quarry floor, floors and chambers of the first and second phases, preparation and rifling workings, drilling parallel wells and breaking them, laying the developed space hardening mixtures, characterized in that. with the aim of increasing labor productivity in drilling and blasting operations, improving the ventilation conditions of underground workings and reducing mineral losses, digging reserves with ledges to a depth less than the designed pit depth to the height of one ledge, and at the same time dredging reserves under the bottom of the open pit with first-stage chambers with laying out the space of hardening mixture, in the process of working out the penultimate step, the reserves of secondary chambers are drilled from the pit bottom, then the stocks of secondary chambers are repulsed Amer layers in ascending order blasting holes and filling them portions generated spaces with the trusting mixture through the unblown areas of the wells in the lower ledge of the open pit, and after solidification of the bedding, exploding of the stocks of the lower ledge of the open pit is carried out by blasting the unexploded boreholes. Schig.1 in the 5th - AAA W-A FJ 2 h Fig.Z Fy 6