SU829949A1 - Method of working mineral deposits - Google Patents

Description

(54) METHOD FOR DEVELOPING DEPOSITS OF MINERAL RESOURCES

one

The invention relates to mining and can be used to develop mineral deposits by underground mining.

There is a method of developing ore bodies with the delivery of ore by force of an explosion and cleaning the bottom of the chamber with water supplied through wells that are drilled in the ore body 1.

There is also known a method for developing ore bodies using a water stream for capturing, transferring and transporting the exploded rock mass from the refining unit to the receiving hopper, which consists in borehole blasting of ore from bottom upwards and releasing it through a system of final workings. Before the ore is crushed in the block, its cleaning space is isolated from the rest of the mine workings, then water is supplied to the block cleaning space through the supply channels and filled with water, while the static pressure of the stream is maintained at a greater or equal to the height of the block for the entire breaking period in one cycle. The cutting of the ore layers is carried out with a slowdown equal to the time of entrainment by the water flow of the rock mass repulsed by the previous explosion, and

when the block has been completed, the spent space 2 is laid down. The disadvantage of the danks of the method is the high water consumption for filling the volume of the purification block before creating a static head corresponding to the flow rate. In addition, the horizontal location of the wells, parallel to the direction of flow, creates technological difficulties and requires energy consumption in a pulsed mode, since the flow

The length of the ore is introduced into the entire broken section. As well as along the length of the block there is a section of the stream with the lowest speed, where temporary accumulations of the crushed rock mass are possible, which necessitates an increase in the time interval between the explosions of the sections, and this leads to an increase in water consumption.

The purpose of the invention is to reduce the consumption of water and energy.

The goal is achieved by producing

lowering the water level in the purification unit to a height of 1.5-2 diameters of the inlet pipeline by supplying compressed air to the cleaning space of the unit and then extracting the mineral by vertical wells with the direction of the explosion against the flow of water.

FIG. 1 shows the plan of the working field horizon; in fig. 2 - projections onto the vertical plane А-А of the main mine workings and the cleaning chamber (block), ready for breaking into the running stream.

In the case of the development of a powerful field, the chambers are located across the strike. On the delivery horizon, field spurs I, which are connected by ore field 2, run parallel to the ore body strike. From the inlet of water flow 3 from Orth 2, a gap 4 is passed to the entire block height and then the block is drilled by deep explosive wells 5. After the wells are drilled The explosives, according to drift 1 or through the pipes laid in this drift, supply water from the reserve reservoir or pumping station, the required performance with the design pressure. The supplied water fills ort 2 and rises in the cutting gap to the height of the design head. Then, the chamber (block), which is isolated from the environment, is supplied with compressed air 6, which lowers the water level in the cutting gap above the bottom flow to a height of 1.5-2.0 diameters of the inlet pipeline (or inlet mine workings). After these operations, the water is opened from the unit to the receiving pipeline (or receiving mining output) 1, and as soon as a stable flow regime is established, portions of the rock mass begin to explode with sections with a deceleration equal to the time of ash flow by the rock mass destroyed by the previous explosion . The horn mass in the stream enters the receiving bin 7, where it settles, and the water is filtered into the sump 8 and pumps are pumped from the pump chamber.

In the reserve reservoir or directly in the circuit, pumps are pumped into the cleaning unit. Then the dehydrated hearth mass along the trunk is lifted to the surface by lifting vessels. After the entire rock mass has been crushed in the block (chamber), the voids are filled with hardening material (low strength concrete). The following blocks (chambers) are processed in a similar way.

This method allows to significantly reduce costs due to water saving.

and energy.

Claims (2)

1. USSR author's certificate No. 275939, cl. E 21 C 41/06, 1969. 2. USSR author's certificate number 578458, cl. E 21 C 41/06, 1976. -X i5i5vJS "Si; {XSSJ3c55" s W. // X