SU1518521A1 - Method of mining ore deposits - Google Patents

Abstract

The invention relates to underground mining of ore by storey collapse systems. The goal is to improve recovery rates and reduce operating costs when mining ore. Pass t preparatory-rifled workings. The mining of ore is carried out in blocks, and in the blocks, the ore is crushed to form pillars between them and the ceilings. At first, the ore receiving mines are formed in the inner section of the block, while the walls of the mines are formed vertically. Then, blasting and compulsory release from the open blocks of ore from the inner section through the ore receiving mines are carried out. Ore receiving mines of the outer section of the block (pillar) are formed, the ore blasting in which is carried out with a slowdown in relation to the ore blasting in the pillars and ceiling. The ore reserves in the pillars and the ceiling are repulsed and the reserves of the broken ore are released first through the ore receiving mines of the inner section of the block to the maximum dilution in the output dose, and the remaining ore from the pillars and ceilings is released through the ore receiving sections of the external section of the block under collapsed overburden rocks. 2 Il.

Description

The invention relates to the mining industry and can be used in underground mining, ores by floor forced collapse systems and chamber systems with bottom ore output.

The purpose of the invention is to improve recovery rates and reduce operating costs when mining ore from blocks.

FIG. 1 shows a block repaired by a chamber development system with subsequent excavation of the pillars and ceiling, at the stage of ore production from the inside of the block, a vertical section; Fig. 2 - the same., at the stage of ore production under collapsed rocks after the explosion of pillars and ceilings.

The method is carried out as follows.

The mining unit 1, which is subject to mining, has upper and lateral contacts with collapsed rocks 2, is divided into inner 3 and outer 4 sections.

When the reserves of the block are crushed, they are exchanged between the blocks and the ceiling,

The ratio of the width of the inner portion L of the block .to the width of the outer portion 1 of the block is taken within

K - p (1.15-1.30) p,

where p is the number of rows of exhaust workings in the inner part of the block; L - width of the inner section

block;

1 - the width of the outer section of the block.

First, the inner section 3 of the block .1 prepares for the release of ore by sinking preparatory mine workings, in which besides the drilling 5 and ventilation 6 workings, delivery 7 and ore receiving 8 workings are found with vertical walls). 7 ki equip with means 9 of release, for example, vibrating feeders. Vibrating feeders 9 are placed from the front loading of the table to enable the forced release of ore, and rudder mines 8 are made with vertical walls. The preparation of the release horizon is carried out by passing the elongated chambers under the vibration feeders and mounting the exhaust means 9, then passing the trench ort 10 along the length of the block. Compensating rebel 11 passes through trench 10 to the height of the trench and knock them out with a horizon of notching 12. Then dig up the massif in the contour of trench 8 and produce sectional explosive blasting to compensate rebel 11. In parallel with the preparation of the release-delivery horizon, the inside of the block is prepared for breaking. The breaking off and forced release of broken ore 13 from the inner section 3 of the treatment unit 1 are carried out.

The array is drilled by wells 14. Simultaneously with the release of chamber stocks, rudose mines 15 of the outer section 4 of the clearing unit 1 are formed, whose walls are made inclined (trenches or funnels). The outer section 4 of the base of the refining unit 1 prepares gravity-fed ore by means of settling either vibrating feeders with the possibility of side loading of the table or scraper winches (not shown). A massive explosion was made with a lead in the pillar 16 and ceiling 17 in relation to the reversals of the outgoing workings of the outer section 4 of the base of the refining unit and they began to release the repulsed reserves. Repulsed reserves from the pillar 16 and ceiling 17 are forcibly discharged initially through the receiving sections of the inner section 3 until the maximum dilution in the output dose, after which the remaining broken ore is discharged through the receiving sections 15 of the external section 4 of the refining unit.

Claims (1)

Invention Formula 5 Q five A method for developing ore deposits, which includes sinking preparatory-rifled cuttings, mining of ore in blocks, excavation of reserves with formation of pillars between the blocks and ceilings, clearance of ore receiving mines in the internal and external sections of the block, explosive blasting of reserves of ore in blocks, pillars of mortars; On the other hand, the ore production from open blocks and collapsed pillars and smelters under collapsed overburden rocks, characterized in that, in order to improve recovery rates and reduce operating costs during ore mining, first mine openings in the inner section, block, and the walls of these workings are formed vertically, then the ore is crushed and forced release from the inner section of the block through the ore receiving workings, make up the mine receiving workings of the outer section stka block breaking of ore which is produced out with deceleration towards ore breaking in the pillars and potolochine ore reserves of pillars and potolochiny first forcibly discharged through rudopriemnye generating internal block portion to the limiting dilution in release dose and the remaining ore ielikov and potolochiny release through the ore-prism production of the outer section of the block. Editor A.Oar Compiled by V. Cherkagaenkov Tehred LoSerdyukov Proofreader M.Maksimishinets Order 6582/38 Circulation 449 VNIITSH of the State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 1130355 Moscow Zh-355 Raushsk nab. 4/5 Production and publishing combine Patent, g, Uzhgorod, ul, Gagarin, 101 Subscription