SU1726745A1 - Method of working steeply-dipping thin ore deposits - Google Patents

Description

This goal is achieved by the fact that according to the method of developing steeply dipping ore deposits of low power, which includes mining blocks along a deposit, carrying out ventilation, haulage and subsurface drifts in the block, drilling, loading and blasting holes in a clearing bottom with ore breaking, ahead of mining subsurfaces in relation to others, equipment of the downhole space by a mechanized complex with a drilling carriage, movement of the mechanized complex as it is refined and the release of ore from the overlying sublevels through the lowering to the haulage drift, blocks along the strike are advanced with the upper sublevels ahead of the upper a value (where b is the height of the sublevel drift; a is the angle of repose of broken ore), before drilling and charging, in their lower part, and before blasting holes, the bottom-hole space opens and produces ore, and drilling holes in the upper sub-floor is carried out with the release of ore from the lower floors, while the cleaning face in the floors forml dissolved 1.Ds1 at a distance from the drill carriage (where j - permeability coefficient of broken ore at release; d - the average size of a piece of broken ore).

Not the drawing shows the scheme of development of the field by the proposed method.

The preparation of the block consists of carrying out a haulage roadway 1 and intermediate roadways 2. The floor height is divided into several sub-floors (as an example, three sub-floors are shown in the diagram). The assembly of the complex is carried out directly in the assembly chamber of the unit. The mechanized cleaning complex consists of pneumatic support, lining 3, monorail 4, drilling carriage 5 and restraint 6. To ensure safety of drilling and drilling holes when using several drilling carriages, the complex is equipped with a guide gate 7 with the ability to change the angle of inclination from 0 to 90 °

Block work out with advanced excavation of the lower sub-upper. This ensures the safety of work and a wide front for drilling, using a cleaning complex with a drilling carriage on each sub-floor. The magnitude of the advance is determined by the angle of repose of the broken ore located on the sole

ledge (substage). In the course of cleaning operations, the specified amount of advance must be such as to ensure the location of broken ore between the ends of the roof.

and the soils of the sublevel drift are strictly at an angle of repose: a bctga (where b is the height of the sublevel drift; a is the angle of repose of broken ore). If this distance exceeds the required value, then the lower horizontal holes above

sublevel roof roof impossible

drill as this part of the end face

turns out to be full of broken ore.

Technological operations are performed in the following sequence.

Before drilling, drill holes overlap the bottomhole space in the region of the movement of the drilling carriage by turning the guide gate mounted on

the lower section of the pneumatic bolting. Then drill holes with the help of drilling carriages of the cleaning complex. Before blasting the holes, the flaps (guides), drill carriages again open.

is driven to the highest position on the sublevel drift. Then the holes are blown up along the entire height of the block. Ore is produced through the bottomhole space, bypassing the ore by force of gravity from the upper sub-floors to the lower sub-floor. From the bottom-hole space of the lower substage, the ore enters through the loading devices to the horizon

After the release of ore from the bottomhole

the spaces of the upper substage carry out the shifting of the mechanized lining of the complex and then simultaneously carry out the release of ore in the underlying sub-floors and the drilling of holes in the upper substage.

The shifting of the mechanized lining of the cleansing complex on the underlying substage is carried out upon completion of the ore output.

During the refining operation, the optimum distance between the refining downhole line and the drilling carriage is strictly observed in accordance with the expression I j (d, to ensure effective ore outflow. Parameters included in the expression depend

from physical and mechanical properties of ore. The average size of a piece of broken ore d is determined empirically for the specific mining and geological conditions of the area being mined.

If this ratio is not observed, vaults are formed in the wellbore space, frequent seizures of individual pieces and the discharge operation becomes impossible.

individual pieces and the operation of release becomes impossible.

Using the proposed method of developing low-power fields allows reducing labor costs for production, ensuring that drilling operations at the upper substage are combined with the release of ore on the lower floors, eliminating congestion and ore vaults upon release.

In addition, with this method of field development, the safety of work is improved, since the fall of the exfoliated rock pieces from one substage to another is almost completely eliminated, it closes before drilling and drilling of drill holes, the wellbore space in the area of the drilling carriage movement - the combat space in the block as a result of advancing excavation of the sub-floors.

Claims (1)

Invention Formula A method of developing steeply dipping ore deposits of low power, which includes testing blocks along the strike of a deposit, carrying out ventilation, retraction and subsurface drifts in the block, drilling, loading and blasting holes in a clearing bottom with ore breaking, ahead of some subsurfaces in relation to others , equipping the bottomhole space with a mechanized complex with a drilling carriage, shifting the mechanized complex as it dredges and releasing ore from the overlying sub-floors through the underlying and the roll-off drift, which is based on the fact that, in order to reduce production costs by reducing the amount of equipment used in the downhole and increasing the safety of work, the development of blocks along the strike is carried out ahead of the lower sublevels by an amount a (where b is the height of and the angle of repose of the broken ore), before drilling and loading holes, the bottomhole space of the sub-floors is overlapped in their lower part, and before the blast holes are drilled, the bottomhole space opens and produces ore, In the meantime, drilling holes in the upper sub-floor is carried out when ore is released from the lower floors, while the bottom hole in the sub-floors is formed at a distance (where I is the passability factor of the broken ore on release; d is the average size of a piece of broken ore, from the drilling carriage). u /////////; ////////////////////////////// //