SU742589A1 - Method of mining super-thin sharply assending seams - Google Patents

Description

(54) METHOD FOR DEVELOPING AN EXTREME THIN THIN FIRING

LIVED

The invention relates to the mining industry and can be used in the development of very thin (up to 0.4-0.6 m) steeply dipping veins. There is a known method of developing very thin steeply dipping veins, including the drilling of block reserves from the bottom upwards and the division of the sub-floors into short blocks by ore chords spread out from rocks II. The disadvantage of this method is the high cost of maintaining the developed space. In addition, there is a known method of developing very thin steeply dipping veins, in which the blasting of the block passes from the bottom upwards with the rock) Fragile, store ore floor and release it 2. The disadvantage of this method is the high dilution and loss of ore and high costs on the bookmark. The purpose of the invention is to increase the development efficiency by reducing the cost of laying, reducing the dilution and loss of ore. The goal is achieved by the fact that the ore reserves in the floor are mined while three blocks are being crushed at different stages of development in each block, while first removing the ore from the lower part of the first block and laying the worked out space; the lower part of the adjacent second block, and the release of the gassed ore from the lower part of the second block is completed by the time of the formation of the sublevel drift on the surface of the lower part of the first block, after they beat off the upper part of the latter, and the rock, sorted when released, is fed into the worked-out space of the lower part of the second block and at the same time beat the lower part of the third block adjacent to the second block, and after the first block is dredged, when the ore is released from the upper part of the second block and the tab is lower parts of the third block of the sorted breed begin to work out the lower part of the block adjacent to the third block, while the lower part of the block is fought off to a height at which the sorted rock of the upper part of the adjacent block and was completely located in the lower part of the block, and the holes were drilled a distance less than each other than holes drilled in the rock.

FIG. Figure 1 shows the processed floor during the excavation of the first two locks, a longitudinal section; on ig. 2 - practiced floor with the removal of the first three blocks; in FIG. 3, the floor being tracked when the first four blocks are excavated; in fig. 4 shows A-A in FIG. 1, 2 and 3; in FIG. 5, a cut-up of BB in FIG. 2 and 3.

The preparation of the ethnoka (excavation chute) consists in carrying out the haulage road 1 and the flanking rest 2. In the process of excavating each block, the up-and-down rising 3 | 4, 5, etc. The development of the floor begins with the block number 1, the lower part of his b taken out by the development system with separate excavation and laying of the cleaning space of the enclosing rocks. After the cleaning works are completed, a dense floor of planks is laid on the surface of the bookmark or the previously smoothed surface of the bookmark is poured with a cement-sand mortar to form concrete floor 7. The roof of the lower part of the block no. (Above the floor) is equipped with a floor drift 8 fixed with spacer support on metal brackets . Removable discharge hatches are hung in the roof of the driveway. Simultaneously with block No. 1, the lower part of the W 2 block adjacent to It is excavated by a mining system with ore mining.

By the moment of completion of the excavation of the lower part of block No. 2 and the complete release of the aerated ore from it, they complete the design of subsurface seal 8 in block 1. Above the rising 3 of block 1, the vibrating screen 9 with the belt conveyor 10 is started. By ore storage, in order to improve the contrasting properties of the ore (increasing the degree of fragmentation of the bottom part of the slab), the holes in the core are located more often than on rock.

The ore delivered from the upper part of block No. 1 is delivered to the vibrating screen 9 by a scraper 11. On the vibrating screen, ore fines through ore discharge sections of the rising 3 are transferred to the main horizon. Sorted waste rock from the surface of the pneumatic screen is fed with a conveyor 10 adjacent block 2. As it is filled, the belt conveyor is enlarged.

Simultaneously with the mining of the upper part of block B 1, laying down the lower part of block M 2, the lower part of block 3 is excavated using the system with ore storage.

After completion of working off the upper part of block 1 and the laying of the lower part of block 2, a flooring is constructed on the surface of the backfill material and in block 2 the sublevel drift 12 is formed (by analogy with the construction of the sublevel drift 8. Block 1). At this point, the testing of the lower part of the block No. 3 is completed, and the vibrating screen 9 is installed above the rising 4 and the belt conveyor 10 is mounted. After that, the upper part of the block No. 2 is started with the system with the store (similar to the upper part of the block No. 1), issued from the block The ore is directed to the vibrating screen. The ore maloch from the vibrating screen enters the ore mining department of Rising 4 and is transferred through it to the main horizon. The waste rock sorted out on the vibrating screen is conveyed by a belt conveyor 10 into the waste space of the lower part of the block 3 for laying it out. Simultaneously with the excavation of the part of block No. 2 and the laying down of the lower honor of block No. 3, the system with the ore mining is used to excavate the lower part of block No. 4.

At the stage of full development of cleaning works in the floor (excavation section), there are three adjacent blocks in simultaneous operation. In one of them (with the previously removed and laid down part), the upper part is dredged. The ore produced from it is directed to a vibrating screen on which ore fines are extracted from the ore that enters through, the ore section of the insurgent rises to the main horizon, and the sorted waste rock is directed to the spent space of the previously removed lower part of the adjacent block. At the same time, there is a notch of the ru, at the bottom of the third adjacent to the second bpock. If necessary, in order to increase the load-bearing capacity of the filling mass, the latter can be strengthened by pumping into it (or watering its surface) with a cement-sand mortar.

five

The ratio of the heights of the lower and upper parts of the blocks is taken in view of the complete filling of the cleaning space of the lower part of the block with the sorted blank rock. Possible excess waste rock, selected on the vibrating screen from the ore extracted from the upper part of the block, passes the main horizon through the breeding department of the insurgent.

According to the calculations, the separation of only half of its volume from the ore mass repulsed in the upper part of each block into the rock makes it possible to increase the metal content in the ore produced from the block. Replacing the ore pits with a backfill array allows to reduce the loss of ore in the whole block. In addition, reducing the height of the stores (both when mining the lower and upper parts of each block) allows to somewhat reduce the width of the cleaning space without changing the labor intensity of ore production (or reduce the labor intensity of production without changing the width of the cleaning space)

Claims (3)

1. A method of developing very thin steeply dipping veins, including the blasting of block block reserves from bottom to top with rock-breaking undercuts, storing the ore on the floor and releasing it, so that, in order to increase the development efficiency by reducing the cost of insertion, reducing dilution and losses ores, ore reserves in the floor are processed while simultaneously crushing three blocks at different stages of development of work in each block, while first removing the ore of the lower part of the first block and laying the developed space along The ore from the lower part of the adjacent second block is simultaneously broken by the ore from the lower part of the second block, and the release of the aerated ore from the lower part of the second block is completed by the moment of formation of the sublevel drift on the surface of the lower lower part of the first block, then the upper part of the last block is beaten off the space of the lower part of the second block and at the same time beat off the lower part of the third block adjacent to the second block, and after the first block has been removed, 0 when ore is released from the upper part of the second block and the lower part of the third block is sorted by rock, the lower part of the block adjacent to the third block starts mining. 2. The method according to claim 1, which is also distinguished by the fact that the lower part of the block is fought off to a height at which the sorted rock in the upper part of the adjacent block was completely placed in the lower part of the specified block. 3. The method according to claim 1, which is also distinguished by the fact that the holes for ore 5 are drilled at a distance shorter from each other than the holes drilled in the rock. Information sources, 0 taken into account during the examination 1, Rafienko D.I. Systems with ore storage in the development of vein deposits. M., Ned 1967, p. 58-60. ra 2. AGOSHKOV M.I. and others. Development systems of vein deposits. M., Gosgortekhizdat, i960, p. 85-87 (prototype). Y //////// 7 // blo «v fV. ... /; v f V, - J4 X. . (Sl.