SU1765402A1 - Ore block completion method - Google Patents

Abstract

This invention relates to the underground mining of mineral deposits. The goal is to reduce labor costs for the development of the unit by reducing the volume - mining operations. Within the limits of the block being worked out, compensatory cavities are formed between the cutting horizon and the drilling horizon by blasting wells drilled before the cutting excavations. Explosive chambers are formed by expanding the compensation cavities by blasting wells that were designed with a shortage of undercut before undercutting. After the ore has been discharged, the formed chambers at the exit to the excavation of the sweep are blocked and charged, and the massive ore collapse is carried out by blasting the explosive chambers with a millisecond delay. The ore is discharged through the workings of the bottom. 2 Il.5 (L

Description

The invention relates to the mining industry and can be used in mining blocks for underground mining.

There is a method of mining blocks, including the excavation of ore mass collapse, penetration of the delivery workings of the bottoms of the blocks with the formation of high hooking, sublevel workings, vertical workings, drilling wells and its release.

There is a method of mining blocks, including preparatory and rifled workings, forming the bottom of the block, forming workings of the sweep horizon and workings of the drilling horizon, drilling downhole wells, charging and sectional blasting of wells, breaking the ore by massive collapse and production of ore.

The disadvantages of the known methods are the complexity of the design of the mining system and the complexity of performing such operations as carrying out flat workings with the delivery of rock mass by the force of an explosion, designing a sufficiently high hook of the unit to absorb seismic waves from flat explosive charges. aimed at cutting.

The purpose of the invention is to reduce labor costs for the development of the block by reducing the volume of mining operations.

The essence of the proposed method lies in the fact that in the method of working out blocks, including carrying out preparatory and rifled workings, forming the bottom of the block, forming workings of the sweep horizon and workings of the drilling horizon, drilling downhole wells, XI and Cb

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The crushing, ore blasting by mass collapse and ore production through the bottom workings, form compensatory cavities within the block’s limits, compensate cavities between the cutting horizon and the drilling horizon by blasting wells drilled to the excavation wells, form explosive chambers by expanding the compensation cavities by blasting wells decorated with a drill to the excavating wells, after the release of broken ore, the formed chambers at the exit to the production of the sweep are blocked and charged, and the massive collapse of the ore is carried out koi blast chambers with millisecond deceleration.

Figure 1 shows the block array diagram prepared for the collapse, section; figure 2 - section aa in figure 1.

The method is implemented as follows.

In preparation for the collapse of the block array, the haulage openings 1 and the bottom 2 are formed with the formation of an undercut 3, the height determined by the need to create an inert layer on the notch to protect the bottom of the block from destruction of the array during the explosion. At the level of the drilling horizon 4 (previously the haulage horizon when mining the overlying floor), drilling workings 5 are made, of which drilling wells 6 in terms of future cavities (slots) 7, which, depending on the purpose of charges B, have a different shape. Next, adjacent wells 8 are drilled across the cavity in terms of their number, depending on the width of the cavity or the amount of explosive charge. Wells 8 together with the pioneer well are drilled from the drilling horizon with access to the undercut. Then, from this number of wells, parallel cavities of adjacent wells are also drilled, and the second cavity of 9 adjacent wells is drilled parallel to the first one also to the undercut level, and all subsequent cavities 10 are not drilled to the undercut level by 2/3 LNS of the cavity charge. The cavities of the conjugate wells have: the second cavity from the first one at a distance of three diameters of the wells, the subsequent rows are drilled at a distance approaching the calculated LNS and verified by an experimental explosion.

The vertical cavities are shaped in an explosive manner: a compensation cavity 11 to the drilling horizon 4 by blasting sections of the first and second cavities

conjugate wells from the undercut and the explosive cavity 7, also by sectional blasting of the third and subsequent cavities from the lower level of expansion 12 blow up the cavities, i.e. from a height of 2/3 LNS explosive

cavities to the level of the roof sweeps. Prior to the design of the explosive cavity, the rope is lowered along the compensation cavity to a hook to eliminate possible plugs from the rock mass.

After registration of the vertical cavities at the exit of their cutting, the plugs 13 are installed, suspended on the spacers 14, and are filled up with rock mass to the level of the cavities with drill cuttings. After preparation

The explosive cavities (chambers) charge the charging hose to the mouth of the cavities and charge them with the installation of militants with a slowdown in each subsequent charge of 50 ms. Then, explosive charges placed in explosive chambers are exploded. After a massive collapse of the ore mass, the ore mass is produced.

Claims (1)

Invention Formula A method of working out blocks, including preparatory and rifled workings, forming the bottom of the block, forming workings of the sweep horizon and workings of the drilling horizon, drilling downhole wells, loading and sectional blasting of wells, blasting, ore through bottom mining, characterized by that, in order to reduce labor costs for the development of the block by reducing the volume of mining operations, within the limits of the block being worked out, compensatory cavities are formed between the horizon under - chipping and drilling horizon blasting wells drilled before the workings of the sweep are formed by blasting chambers by expanding the compensation cavities by blasting wells decorated with a shortage of drills before the workings of the sweeping, after the release of broken ore, the formed chambers at the exit to the workings of the sweep are blocked and charged, and the massive ore is crushed by blasting cameras with millisecond delay. 6 but- about Ј IL CD % l.Ј four Editor Z. Khodakova Compiled by O. Zalesska Tehred M.MorgentalKorrektor L.Livrints b a 3 TIN J sh ABOUT IT well & F four Alesska