SU1656096A1 - Method of mining steep ore deposits - Google Patents

Abstract

The invention relates to the underground mining of deposits with hydrodistribution of ore. The purpose of the invention is to reduce the development costs of deposits by reducing water consumption and the cost of filling operations. Transport, filling and ventilation workings (B) are made. The first two passes at an angle, respectively, in the direction of the receiving bin and the spent chamber (K). The angle of inclination is determined by the above calculation formula, a drilling and blasting blasting of ore is carried out in K. Ore of release2 through exhaust B and transported by supplying water directly to transport B to broken ore. Hydro transport of ore is carried out over transport soil B. The developed space is laid with material prepared from coarse aggregate and sandy cement mixture. The amount of water supplied in one launch is determined from of the above expression Preparation of the delivery material is carried out in the process of its transportation by water through the backfill In the sequential supply of water to it, then water the aggregate and, finally, the sand-cement mixture and K, which pass from the filling B along its axis above the level of the roof of the spent K. The amount of water supplied per launch is determined by the formula given in the description of the invention. The penetration K for materials and water is carried out from the filling B in the direction from the spent K in the sequence opposite to the indicated sequence of feeding the aggregate and water to the filling B 6 Il (L

Description

The invention relates to mining and can be used in the development of steeply dipping ore deposits of low and medium power.

The purpose of the invention is to reduce the development costs of deposits by reducing water consumption and the cost of backfilling.

Figure 1 shows the unit being processed, a cross-section; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 2 (section of the bottom of the block on the rising transport development); figure 4 - section bb

in Fig 2 (sectional block ascending); Fig. 5 shows a section of the GGD of Fig. 3. Fig. 6 shows a longitudinal section through the transport working connected with the developed space of the pledged chamber.

The method is carried out as follows.

The developed steeply dipping ore deposit with stable host rocks is divided into blocks. The height of the block (floor) is equal to 50-60 m, and the block length is from 40-50 m to 80-100 m

oh eaten oh oh

H)

about

The preparatory work consists in making a transport drift 1 on the rock in the recumbent side of the deposit. Moreover, the transport drift 1 passes at an angle a to the horizon, chosen taking into account the physicomechanical properties of the ore (rock) transported by the mine mudflow, based on the ratio

a Ј arctg

(A-PB)

wg + rwSKr--)

(one)

where and / OB - density of rock and water, respectively;

Kp - coefficient of loosening;

i is the dynamic friction coefficient.

Parallel to the traffic drift 1, the running drift 2 passes at an angle a to the horizon. The transport drift 1 and the driving drift 2 knock down the trunk 3. To drain the mine water flow (mine villages) in the soil of the transport drift 1, a settler 4 is constructed and at the soil level of this drift, the settler 4 is blocked by grates 5 of grate (Fig. 2). Next, the transport drift 1 is knocked down with the receiving bin 6, which is connected to the barrel 3. A water collector 7 is constructed to receive water, which is connected to the sump 4 with an inclined production. The dimensions of the section of the transport drift 1, which is blocked by grates 5 of the grate type, the settler 4 and the sump 7, are calculated based on the specified volumes of the mining villages. In order to provide a closed water supply system, the catchment basin 7 is knocked down with a drift 2 with rising production 8.

On the flanks of the block, there are block rebel 9 and 10, knocked down with transport drift 1 and transport drift 11 of the overlying block. From the block rebels, 9 and 10, they pierce the walkings into the chamber through 4-6 m vertically. Walkers are placed horizontally or with a slope of up to 30-40 ° towards the camera. FIG. 4 shows a preparation case with horizontal passes. Horizontal passes 12 passes t in advance over the entire height of the block rebels 9 and 10 before they are fixed, so that they do not subsequently break the lining.

Between the block rebels 9 and 10, above the transport drift 1, an ore deposit 13 passes through the ore deposit, which also serves as the vent in the initial stage of development. From the sunk drift 13 and the transport drift 1

discharging discharges (duches) 14 connecting the developed space of the chamber with the traffic drift 1. The outlet ports of duchek 14 are located in

the wall of the transport drift 1 along the entire length of the block after 8-10 m. Block rising 9 and 10 and the transport drift 1 are connected with the road drift 2 by the running gears 15 and 16 (Fig. 3). On the overlying

At the flank of the block, a stationary storage tank 17 for water is constructed by penetrating a special section of a large cross section from the road drift 2 at an angle of 40-50 ° relative to the transport drift 1 and a solid concrete lintel with a shutter door 18 is installed at its junction with this traffic drift ( FIG. 3).

In order to increase the water column in the storage tank 17, the inlet opening on the side of drift 2 is partially blocked by a concrete bridge 19 (figure 5). For supplying water to storage tank 17 in road drift 2 and rising

5, an outlet 8, connected to the catchment basin 7, is laid in a pipeline. For the delivery of equipment, materials and explosives, monorail or monokanatnye means of transport are installed in the roof of the road drift 2.

After completion of the specified preparatory work, they start the cleaning works.

The development of the reserves of the block produced

5 from the bottom up, the filled up space of the broken off ore by the broken off ore (magazine) leaves a free space of 2 m in height.

Ore beat off from the surface of the store

0 by blasting blast-hole charges, which eliminates the need for drilling workings. Telescopic perforators are used to drill vertical holes. Repulsed ore is released under the action of gravity through exhaust outlets (duches) 14 at the base of the block. After breaking a given volume of ore, a partial shop is made to form free space for drillers, since

0 exploded ore increases in volume by 25-35%. The ore flowing out by gravity from duchek is transported and, within the block, by the mine silt flows. For this, a storage tank is filled with water.

5 17. Water is supplied to the storage tank 17 from the water collector 7 by means of a pump through a pipeline laid in the rising well 8 and the drift 2

The mass of water supplied in one run from the storage tank is normalized depending on the mass of ore that flowed by gravity through duchki into the transport output, on the angle of inclination of the transport output and on the transportation distance according to

ftcosa-sina sin a + i /, cos a

kt

TT K3, (2)

where me is the mass of water supplied in one run from the storage tank, t;

tt is the mass of broken ore flowing by gravity from duchek to transport production, t;

a - the angle of inclination of the transport output, hail;

(I is the coefficient of dynamic friction;

Kp - coefficient of loosening;

К3 1.1-1.3 - reserve factor of water consumption, depending on the distance of transportation.

Having filled the storage tank 17 with water, they open the shutter door 18 and release a predetermined amount of water directly into the transport drift 1. The water flow released into the transport drift 1 captures portions of ore leaked by gravity from duchek 14, and being saturated with solid material to a certain concentration, moves down under the action of gravitational forces on the sloping soil transport drift 1.

In the transport drift, 1 mine mudflow passes through the grate 5, is freed from the liquid component and ore fines, and then the dehydrated ore mass flows by gravity into the receiving hopper 6. The ore fines, which flow along with the water into the sump 4, The grate 5, after the outflow of water into the catchment 7, is re-bled to the receiving bin 6. From the receiving bunker 6, the dehydrated ore is reloaded into the skips and through the cargo trunk 3 to the surface.

After a certain period of time, water is again released from the storage tank. 17 and the transport drift 1 transports the ore flowing by gravity from duchek 14 ore by mining mud flow to the barrel 3. Water flow is continued until the magazine is unloaded by a specified amount. Then again, the ore is crushed from the surface of the store, a partial release of ore from the store by flushing the ore that has spilled out by gravity from the duchek 14 ore into the transport drift 1.

ores by gravity from duchek 14 in small portions and release of water from the stationary storage tank 17, the whole ore is crushed in the chamber and the store is unloaded.

At the end of ore blasting in the chamber

total ore is released from the chamber and transported by mine mudflows to trunk 3 (Fig. 6). The succession of ore by gravity from duchek 14 and release

0 water from the stationary storage tank 17 in a predetermined mode, the mine mudslides are transported by all broken ore mass released for some time

5 stores to the cargo trunk 3.

After the chamber stocks have been removed, the chamber is hardened with a hardening mixture.

The preparatory work is

0 in carrying out oblique filling generation for transportation of filling mixture. At the same time, this development is made at an angle o; to the horizon chosen with regard to the physicomechanical properties of all the components of the solid component of the filling mixture, based on relation (1).

In the upper part of the excavation, two chambers (tanks) pass. The first camera 20. located above, is knocked down from the day

0 surface of the rising production 21 (rock spawn) for filling it with coarse aggregate of the filling mixture (waste rock). In front of camera 20 at some distance, lower down

5, filling the second chamber 22 to fill it with fine aggregate with a tamping material (dry sand-cement mix) and knock down this chamber with the surface with the help of

0 specially drilled wells 23 large diameters. Both chambers 20 and 22 are connected to a backfill development with exhaust workings (ducks). Above the chamber 20 build storage capacity

5 17 dl water. Thus, all the chambers pass along the axis of generation 24 above the roof mark of the used chamber.

After completion of the specified preparatory work proceed to the backfill

0 jobs

Coarse aggregate filling mixtures (rock) and fine aggregate with a host material (dry sand-cement mixture) are fed continuously from the bottom surface through the rock-release 21 and well 23. According to the exhaust output (duce) from chamber 20 to production 24 they release by gravity a predetermined portion of a large filler, and from the chamber 22 located below, they release a portion of fine aggregate with a holding material. The water in the storage tank 17 serves on mine plumbing. At the same time, the mass of water supplied in one run from storage tank 17 is normalized depending on the mass of the solid component of the filling mixture (coarse aggregate and small aggregate with binder material) flowing by gravity through duchka from both chambers 20 and 22 into the output 24, from the angle of inclination of production 24 and from the distance of transportation according to the relation (2).

Having filled the storage tank 17 with water, they open the shutter door and release a predetermined amount of water, determined by the formula (2), where tt is the mass of the large aggregate and sand-cement mix, into production 24, Water flow released into production 24, captures a portion coarse aggregate leaked from exhaust chamber (duchka) from chamber 20, and under the action of gravitational forces moves down the sloping soil of excavation 24. Next, hydrogen flow enters the portion of fine aggregate flowing from chamber 22 and saturates Moving down to the desired concentration, it moves down the excavation 24, carefully moving during the movement. From generation 24, the filling mixture is ready to flow into the developed space of the pledged chamber,

At this time, the coarse aggregate and fine aggregate flowing out of the chutes, 24, from both chambers, are again fed with a stream of water into the feed material, and the cycle of preparing and transporting the filling mixture continues.

Claims (1)

Invention Formula A method for developing steeply dipping ore deposits, including penetration of transport, ventilation and backfill workings, drilling and blasting of ore in chambers, exhaust ore through exhaust workings to transport output, water supply to broken ore, hydrotransport on the soil of transport output, preparing backfill material from coarse ore aggregate and sand-cement mixture and laying of the goaf, characterized in that, in order to reduce the cost of developing deposits for the expense of reducing water consumption and cost of backfilling, transport and backfill workings are held at an angle, respectively, in the direction of the receiving bin and the spent chamber "Arctg ftCfr-A) A + / ъ (Cr-1) Where and ръ - density of the broken mountain mass and water, respectively; Kp - coefficient of loosening; / l - the coefficient of dynamic friction; the water supply is carried out directly into the transport output, and the amount of water TV supplied during one launch is determined from the expression Ghv / cos a - sin a sin a + cos a p - L HPTG Ke, where K3 is 1.1-1.3 — a reserve factor of water flow depending on the distance of transportation; gpp is the mass of broken ore; a - the angle of inclination of the transport output; and the preparation of the filling material is carried out in the process of its transportation by water through the filling generation, by successively supplying a water signal to it, then a large aggregate and a sand-cement mixture from the chambers, which passes from the backfill production along its axis above the roof mark of the spent chamber, and the amount of water supplied in one run is determined from the expression Ghv / and cos "-sina GPT2 K3, 45 sin a + y r cos a - t where tt2 is the mass of the coarse aggregate and the sand-cement mix, and the chambers from the filling generation are driven in the direction from the spent chamber in the reverse order of the filing and water supply to the filling generation 1 3 fae. 2 .  V FIG. 3 2 is r 19 (in Mr. YY 13 FIG. five FIG. 6