Method of underground mining of steep field of firm mineral

FIELD: mining.

SUBSTANCE: invention is referred to mining in particular, to underground mining of steep mineral deposits. The method includes penetrating of development workings and temporary workings, working off in limits of mine section of a mineral stocks from primordial chambers and chamberlets using drilling-and-blasting technique, infilling of the fulfilled room of primordial chambers and chamberlets with lagging. Breakage of stocks of 4 primordial and 3 secondary chambers is performed using general series of hole fans. Breakage of stocks of 4 primordial chambers is performed using a method of holes undercharge with water soluble gel tamping. Then partial discharge of ore from 4 primordial chambers in the conduit is performed followed by lagging of 4 primordial chambers with a hardening mixture. After reaching standard hardness by lagging, washover of the remained holes and/or their parts with water is performed followed by discharge of the remained ore from the conduit of discharge 5, and chambers 3 of the second sequential queue are worked off. Width b of primary 4 chambers is defined from the formula: b = hva2×ρd ×sinα/1800×σt, where hbl - vertical altitude of the block, m; ρd - density of the filling material of primordial chamber, kg/m3; σt - tension strength of the filling material of the primordial chamber, MPa; a - degree of dip of an ore body, grades.

EFFECT: increased range of application on steep and high-dipping fields, in ores of mean and small stability, higher performance of working off of the operational block during clearing excavation of chambers of the second sequential queue.

6 dwg

 

The invention relates to mining and aimed at creating a more secure and cost-effective development technologies steep and steep deposits of minerals by underground mining by reducing losses and dilution when the ore blocks, as well as reducing the cost of manufacture of the mined-out space.

The known method development steeply lived complex morphology (RF patent No. 2187645, AS 41/22, publ. 2002.02.19). The method includes carrying out haulage drift, rising block, mining ore inclined layers, its partial magazynowania, issue nerazreshimaya ore in a mining space through the ore passes. When designing lived with unrestrained power uprising mining of lead ore in two polyblock with increasing Central rising. In the areas of reducing power wires below the minimum width of the treatment space tamakaimoana hard ore is placed to overlap and produce selective dredging, smitten rock leave in polarlake. In areas of mining veins with the power corresponding to the minimum allowable width of the treatment space and over on smitten rock stack permanent flooring, and place of the coupling constant of the deck with the ore passes are installing the exhaust hatch. The disadvantage of this method of having aetsa the high complexity of the operations of method, associated with the use of makesurvey blasting, as well as poor performance, due to the need of magazynowania ore in the block.

There is a method of designing cool ore bodies (RF patent No. 2052111, AS 41/22, publ. 1996.01.10). At the same time amerivault all stocks of the substage and stocks of poor ore. While wells used for blasting of rich ore, not amerivault to the bottom sublevel pillar, and wells used for blasting poor ore, drilling to the full height of the substage. Rich ore discourage in the first place. Repulsed rich ore is removed from the foot of the pillar, then beat stocks of poor ore. Release repulsed poor ores of lead from all podathey at the same time. The disadvantage of this method is the high dilution of the ore with the release of rocks hanging side, as well as poor performance, due to the need of magazynowania ore in the block.

There is a method of underground mining of deposits of solid mineral adopted for the prototype (patent RF №2277171, AS 41/16, publ. 27.05.2006, bull. No. 15). The method is based on two-stage testing deposits with the removal of stocks from the secondary chamber after the construction of at least two adjacent primary cells artificial portaleone bearings using the broken roof rocks of the primary chambers and filling mezhkuskovomu protrans the VA smitten rock and formed cavity solution hardening materials. Excavation designed for production drilling and/or filling operations, have deposits in the roof or in the ore pillars secondary chambers, the breaking of the roof rocks of primary cells produced by the method of nagasarete wells and solution hardening materials available on Sonam between generation and cavities and/or remaining after blasting rocks nezaryazhennymi parts of the wells. The disadvantage of this method is the narrow scope associated with the possibility of its use on a horizontal flat and sloping fields and the impossibility of its use in ores of small and medium resistance.

The technical result of this method is the extension of the application due to the possibility of application on steep and steeply dipping ore bodies with ores of small and medium resistance.

The technical result is achieved by the method of underground mining steeply dipping deposits of solid minerals, including tunnelling preparatory and rifled mining, mining within the mining fields mineral reserves of primary and secondary cameras using explosive blasting, filling in the exhaust space of the primary and secondary cameras tab and the primary camera fill hardening bookmark, according to the invention of the Boiko stocks of primary and secondary cameras produce total numbers of fans wells, moreover, the breakage of reserves of primary cells produced by the method of nagasarete wells stemming from water-soluble gel, and then produce a partial release of ore from the primary cameras in the production of release, leaving filled with ore production release, and then make a bookmark primary camera hardening the mixture, and after a set of tab normative strength produce flushing of the remaining wells and/or lots of water, make the release of the remaining ore from the production of release, work chamber of the second stage, while the width b of the primary chambers shall be determined from the expression:

where hnl- the vertical height of the block, m;

ρP- the density of the backfill material to the primary chamber, kg/m3;

σP- strength backfill material primary camera tensile, MPa;

α - the angle of incidence of the ore body, expected.

The application of the proposed method in comparison with the prototype allows to extend the scope of its application due to the possibility of use on steep and steeply dipping ore bodies with ores of small and medium resistance.

Method of underground mining of deposits of solid minerals, illustrated by drawings, where figure 1 shows a vertical section along the line b-B, stage blasting method nagasarete reserves pervi the different cameras; figure 2 shows a horizontal section along the line a-a, the stage of break-down of primary cells; figure 3 shows a section along the line C-C, the release phase of primary cells; figure 4 shows a vertical section along the line b-B, the filling stage hardening bookmark primary cells, leaving part of the ore in the development of the issue; figure 5 shows a vertical section along the line b-B, the phase of the ore from workings release and leaching of the remaining wells and/or their plots; 6 shows a step of loading the remaining wells and/or plots for blasting chambers of the second stage where:

1 - the field of solid mineral, e.g. steeply dipping ore body;

2 - part of wells, charge explosive in the blasting stocks of primary chambers;

3 - secondary camera;

4 - primary camera;

5 - trench extended from the trench drift;

6 is an inclined exit;

7 loading races;

8 - haul drift;

9 - vent drift;

10 - linkage of the inclined junction 6 field drilling drift 11;

11 - drill drift;

12 - backfill excavation, passed from the air passage 9;

13 - wells and/or their parts for breakage of reserves of the secondary chambers;

14 - wells and/or their parts, filled with a water-soluble gel;

hnl- the vertical height of the block, m;

LNL- block length, m;

- the width of the primary chamber;

α - the angle of incidence of the ore body, expected.

Method of underground mining steeply dipping deposits of solid mineral, e.g. steeply dipping ore bodies, as follows. The steeply dipping Deposit of solid mineral, e.g. steeply dipping ore body 1, is divided into blocks with length LNLand the vertical height hnl. Units prepare the necessary preparatory and rifled workings. Pass delivery passage 8, the loading races 7, of which are trench drift (in the drawing conventionally not shown), extensible into the trench 5. A delivery passage 8 are inclined at exit 6, which is connected with the ventilation passage 9 of the overlying horizon. Of the inclined exit 6 are linkage 10 with the drill drift 11. Ventilation passage 9 are filling production, for example in the center of the camera. From drilling drift 11 drilling the ranks of fans of wells for the conditions of the stocks of primary 4 and secondary 3 cameras. The rows of wells are drilling on the passport blasting calculated by one of the known techniques based on their location to the conditions of the stocks of primary 4 and secondary 3 cameras. Then carry out the loading wells explosive (pellet or cartridge) for blasting method nagasarete C which passes the primary 4 cameras. After loading parts of wells 2 to the required length are stemming of all drilled wells 14 and/or parts of a water-soluble gel, followed by their blasting. Water-soluble gel, such as montavit-gel needed to improve the performance of explosion (locking products blasting), and uncharged wells it prevents deformation from seismic impact of the explosion. After that make a partial release of broken ore from primary 4 cameras in the development of issue-trench 5. Production of ore from the block when mining stocks primary 4 and secondary 3 cameras are as follows. For example, load-haul-machine (in the drawing conventionally not shown) drives to the development of issue-trench 5 through loading in 7, scoops up the loosened ore and transporting it to the bucket at the delivery passage 8 to the nearest ore passes (in the drawing conventionally not shown). During the partial release production release-trench 5 leave filled to prevent filling her hardening bookmark served in primary 4 cameras.

After a partial release of broken ore from primary 4 chambers formed space with a width b, which is determined from the expression

where hnl- the vertical height of the block, m; ρP- density backfill mA is Arial primary chamber, kg/m3; σP- strength backfill material primary camera tensile, MPa; α - the angle of incidence of the ore body, degrees,

fill hardening bookmark through the backfill production 12, for example by means of filling the pipeline. Define the width b primary 4 cameras on the formula above will not destroy the continuity of backfill material primary 4 cameras at the rotating drum and the total ore production from the block when mining secondary 3 cameras and therefore virtually eliminate loss and ore when the ore stockpiles secondary 3 cameras. For example, if the vertical height of the block hnl=70 m; density ρPbackfill material primary camera ρP=2.5 kg/m3; strength σPbackfill material primary camera tensile, σP=2.5 MPa and an angle α the fall of the ore body, α=60 degrees, the width b of the primary chamber will be

After hardening backfill material - hardening bookmarks - primary 4 cameras (to set them with the necessary regulatory strength) begin treatment notch secondary 3 cameras. The solidification time of hardening bookmarks primary 4 cameras depends mainly on the composition of the hardening filling material and can be accelerated by introducing the accelerator is hardening.

Before sewage extraction secondary 3 cameras produce washing with hot or cold water (depending on the composition of water-soluble gel) wells 14 and/or their parts, filled with a water-soluble gel. If necessary, after washing, razvarivat wells 13 and/or their parts again to allow loading them explosive. After charging the wells 13 to the conditions of the stock secondary 3 cameras perform their blasting, followed by the ore through production release in the trench 5. Secondary 3 camera is assumed, depending on the stability of surrounding rocks, leave blank or fill them the cheapest loose tab (without binders).

The application of the proposed method underground mining steeply dipping deposits of solid minerals, provides the following benefits:

- expansion of the scope of this method through the use of the steep and steep fields;

- possibility of use in ores of medium and low resistance;

- increase the overall efficiency of the processing of operational unit in the period of sewage extraction chambers of the second stage.

Method of underground mining steeply dipping deposits of solid minerals, including tunnelling had the part and rifled mining, mining within the mining fields mineral reserves of primary and secondary cameras using explosive blasting, filling in the exhaust space of the primary and secondary cameras tab and the primary camera fill hardening bookmark, characterized in that the breaking of stocks of primary and secondary cameras produce total numbers of fans wells, and the breaking of stocks of primary cells produced by the method of nagasarete wells stemming from water-soluble gel, and then produce a partial release of ore from the primary cameras in the production of release, leaving filled with ore production release, and then make a bookmark primary camera hardening the mixture, and after a set of tab normative strength produce flushing the remaining wells and/or lots of water, make the release of the remaining ore from the production of release, work chamber of the second stage, while the width b of the primary cells is determined from the expression

where hnl- the vertical height of the block, m;

ρP- the density of the backfill material to the primary chamber, kg/m3;

σP- strength backfill material primary camera tensile, MPa;

α - the angle of incidence of the ore body, the hail.



 

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5 dwg

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FIELD: mining, particularly underground ore deposit development.

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2 cl, 2 dwg, 1 ex

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