SU1456575A1 - Method of excavating ore pillars in combination mining of ore bodies - Google Patents

Abstract

The invention relates to the reprocessing of ore deposits due to the extraction of ore pillars. The goal is to reduce losses and dilute the ore by increasing the completeness of separation of the ore from the rock during the transportation of the rock mass. Under the pillars form a cumulative camera. Pillars drill out of the quarry and rock mass below it. The plot of the breed block in a quarry is drilled over the well along its contour. After the formation of the accumulation chambers, the last rock mass is drilled under the pillars. After that, the pillars are pushed into the receiving chambers by blasting and slowing down the charges in the wells from the storage chambers and the charges of the wells, which contour a section of the quarry block above the pillars. After the movement of the pillars is completed, the wells are drilled along a thickened grid through the rock block into ore pillars, which are destroyed by explosive charges at the ends of these wells into storage chambers. The resulting fine fraction ore mass and rock are divided by size during transportation. 2 Il. (L

Description

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The invention relates to the mining industry and can be used in the re-processing of ore deposits and non-ferrous and rare metals, previously worked out chamber-and-pillar mining system.

 The purpose of the invention is to reduce losses and dilute the ore by increasing the completeness of separation of the ore from the rock during transportation of the rock mass.

FIG. Figure 1 shows the developed “section of the field at the first stage (before the explosion is a vertical section, top view; Fig. 2 - the same, at the second stage (after the explosion).

The method is carried out as follows.

Choose the optimal development area of the field from the point of view of the overburden equipment used (working together with an excavator and dump trucks) and evenly

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The distribution of the load on the crushed ore pillars-pillars by a movable block.

When the level of open-cast mining reaches horizon 1, located above the upper boundary of the underground voids 2 and the corresponding allowable safe thickness of the career ceiling 3 (movable rock block), the lowering of open mining operations is stopped. Thereafter, the development of mining operations in the quarry is carried out in a zone having the shape of a square 4 with a side equal to 2a. From the working horizon 1 of the quarry, the moving rock block 3 is contoured by drilling wells.

15 is much smaller than the size of the rock pieces, which makes it possible during transportation to easily separate the ore fraction from the rock fraction (for example, by screening), and

5 along the contour of the selected worker

plot. At the same time, the well has -20, therefore, reduce losses and

are at an equal distance between the neighbor-dilution of the ore

them ore pillars 6.

Simultaneously, from the horizon of the underground haulage mine workout 7 under each ore, entirely - by the post-cutting output to the horizon, the accumulative rock chambers 8 of the mining industry are used with and through them, the rock mass of the receiving chambers 10 is drilled by a network of vertical wells 9 (Fig. 2) .

The excavation of the rock and ore mass from the accumulation chambers 8 is similar in its technological essence to the torso-powered equipment.

Further mining of pillars by the specified technology

Then, charging is performed and 30 are performed first on the selected explosive outburst from the mine, slowing down the workers in the receiving chambers 10 and wells delineating the moving rock block 3. As a result of the explosion

plots from one pillar to another pillar in direction A, and then as the open

relocatable rock block 3. (quarry-35 mining operations, other

on the ceiling, it loses stability and goes down, crushing the ore pillars - pillars 6 into the resulting receiving chambers 10 on the broken breed weight 11 In this case, there is a partial violation of the integrity of both the crushed ore pillars and the displaced breed block. In order to fully accommodate the exploded

40

sections of the field in the direction of B.

Claims (1)

Invention Formula The method of excavation of the ore pillars in the combined development of ore bodies, including the formation of accumulative chambers under the pillars the drilling of the rock block and the ore pillars are produced on a partially disturbed array; cased well. The lower part of the wells located in the ore pillars-pillars are charged with explosives of explosive power, which ensure the production of fine ore mass at break. Due to the fact that the breaking of ore pillars produced by more powerful explosives and a thicker network of wells, the size of the ore pieces significantly smaller than the size of rock lumps, which makes it possible during transportation to easily separate the ore fraction from the rock fraction (for example, by screening), and ore disintegration The main issue on the horizon of the mountain haulage with the use The excavation of the rock and ore mass from the storage chambers 8 is similar in its technological essence to the torus, first at the selected horizon of the quarry, moving workers plots from one pillar to another pillar in direction A, and then as the open sections of the field in the direction of B. Invention Formula The method of excavation of the ore pillars in the combined development of ore bodies, including the formation of accumulative chambers under the pillars rock mass 11, repulsed from the ore-45 all the pillars from the quarry and rock pillars 6, cumulative chambers 8 cut into an appropriate volume. Then, an inclined ramp passes from the adjacent section of the open-pit horizon relative to the selected working section to accommodate the broken ceiling 3 of the drilling equipment on the horizon. Further, from the upper part of the rock block, along a condensed grid of the borehole of the well 12 along the contour of the displaced ore pillars located below it, 6 o In this connection, due to the fact that massif under them, well charging and:) mining rock mass into accumulation chambers, separating ore from rock and transporting ore through sub-50 excavations, characterized in that, in order to reduce losses and dilute ore by increasing the ore’s complete separation from rock, the process of transporting the rock mass, the section of the rock block in the quarry is drilled over the ore pillars being worked out along its contour, then after forming from the underground formations below them, the wells are drilled and:) optional chambers, separation of ore from rock and transportation of ore through underground workings, characterized in that, in order to reduce losses and dilution of ore by increasing the completeness of separation of ore from rock during transportation of rock mass, the section of the rock block in a quarry digs over the mined pillars boreholes along its contour, then after forming accumulative chambers from underground workings, they drill out of the last rock mass under the pillars, and then crush the ore mines. iki ble in for- receiving chamber sequential blasting slowing charge wells of the storage chambers and charge wells poisons contouring completely, and after the end of the whole pillars, wells are drilled along a flat grid over a g block into ore pillars, they are destroyed by blasting explosive charges at the ends of these glands, and the resulting ore mass and rock are separated. plot of the block block career over 10 size during transportation. completely, and after the movement of the entire pillars is completed, wells are drilled along a tightening grid through the rock block into ore pillars, which are destroyed by blasting explosive charges of increased power at the ends of these wells. the gin and the resulting fine fraction ore mass and rock are separated by