Layer development method of deep diamond leads with diamond ore cavities available in mine take circuits

FIELD: mining.

SUBSTANCE: invention refers to mining engineering, and to underground ore deposit mining technology. Layer development method of deep diamond leads with diamond ore cavities available in mine take circuits includes mechanical development of upper layer with chambers with the following development of support solid blocks, and by erecting a flexible covering, and development with modular break system of lower layer which includes diamond ore cavities. Flexible covering is mounted only above diamond ore cavities. First, there mounted is a flexible covering on the soil of chambers being developed together with their development, then - on the soil of support solid blocks being developed together with their development, and after that flexible coverings of adjacent chambers and support solid blocks are connected to each other.

EFFECT: improving development efficiency owing to minimum losses and elimination of ore dilution when being discharged under flexible covering, and reducing volume of work owing to ore mining work combined with erection of flexible covering when developing chambers and support solid blocks.

6 dwg

 

The technical solution relates to mining, namely the technology of underground mining of ore deposits, and can be used in the development of the buried alluvial diamond ore.

Known systems extraction sublevel caving with mechanical release (see Agoshkov M.I. and other lessons learned and assess the prospects for widespread use of variants of development systems with frontal ore / Mining magazine. - 1983. No. 6. - P.34-38).

The main disadvantage of these systems in the development of ore deposits are significant losses and a large percentage (20%) dilution of ore.

Known systems development placer diamond ore, including a pole, chamber and combined (see KLISHIN VI and other Testing of buried placers mechanized / proceedings of the IV scientific and practical conference "high technologies of extraction and processing of minerals". - Novosibirsk: IGD so ran, RAS-2005 - S).

The disadvantage of these systems is the inability of the mining placers harvester at full capacity, because the deposits are very large fluctuations in power that exceeds the capacity of harvesters, resulting in losses of diamond ore and ore.

Closest to the technical essence and essential features is used which may in the coal industry development system of thick coal seams with the use of the flexible beams (see Dmitriev SR and other basic technology development of coal with flexible floors / M.: Nedra, 1967. - 74÷80, 124÷128).

The disadvantages of this technology should include significant costs for installation of flexible beams that are necessary testing of the upper layer by love for mounting flexible beams.

In addition, used in coal mines development system with the installation of flexible overlay in the upper layer and depletion in the bottom layer of drilling and blasting method and production of coal has a significant disadvantage in a significant dilution of the coal at issue, because the proportion of species 2 times higher than the specific gravity of the coal, and when the gusts of flexible overlapping breed ahead of coal, which remains in the dam, so the use of this system development is inefficient.

The technical objective of the proposed solutions is to increase the efficiency when developing the buried diamond placers by ensuring minimum losses and practical exceptions dilution of ore at issue under the flexible overlay, as well as by reducing the amount of work by combining operations ore production and installation of flexible overlay in the development of cameras and supporting pillars.

The task is solved in that in the method layer testing of buried diamond placers with h is the difference in the contours of the mine fields in cavities with diamond ore including mechanized mining of the upper layer of the cameras with the subsequent development of the supporting pillars and installation of flexible overlapping and testing system block caving of the lower layer including the trench with diamond ore, according to the technical solution flexible ceiling mount only above cavities with diamond ore, and first mount the flexible overlay on the ground working cameras simultaneously with their training, and then on the ground working on supporting pillars simultaneously with their development, after which flexible overlapping adjacent chambers and the supporting pillars are connected.

Flexible ceiling mounted simultaneously with the development of cameras and supporting pillars, which significantly increases the efficiency of the proposed method layer testing of buried diamond placers with depression.

Mounted so flexible overlapping parts collapsed rocks from diamond ore, so that failover depressions with diamond ore sublevel caving with mechanical release under the protection of the flexible overlay provides the minimum loss, virtually eliminates dilution.

The method of layer-testing of buried diamond placers in the contours of the mine fields in cavities with diamond ore is illustrated in the example it is realizatsii and drawings (Fig.1-6), where:

figure 1 shows a plan of Stripping and development of the upper layer;

figure 2 - cross section a-a in figure 1;

figure 3 - cross section B-B in figure 1 (installation of flexible overlapping);

4 is a plan testing of the lower layer under the flexible overlay;

5 is a cross-section e-E in figure 4 (a view transverse to the extension of the basin);

6 is a cross section d-D in figure 4 (development of the lower layer), turned.

Way layer testing of buried diamond placers in the contours of the mine fields in cavities with diamond ore implemented as follows.

The top layer is opened by tunnels 1 (1), passed from the quarry. Between a tunnel 1 connect the output 2, and on the contour layer 3 longitudinal and transverse 4 workings of the upper layer - slope 5 (figure 2).

The whole field of the upper layer is cut longitudinal drifts 6 (1) on three panels. In turn, each panel is cut as working off the top layer vnutrepenialnymi drifts 7 and 8 on the excavation unit size 100×200 m Excavation units work by using roadheaders and loading delivery trucks. In each excavation unit work first camera 9, forming the supporting pillars 10 width of 5 m and a length of 100 m, which work after a failover cameras. The width of the chambers 9 is 5 meters

The installation of flexible overlapping produce only over the depression with ALM is postergada ore, the contours In which (1) define the exploration and first mount the flexible overlay on the soil of the working chambers 9, simultaneously with its development, then on the ground working on supporting pillars 10, simultaneously with its development. On the sides of the chambers 9 leave margin flexible overlay for connection with a flexible overlapping of the adjacent supporting pillar 10. Flexible overlapping cameras 9 and the adjacent flexible overlapping the supporting pillars 10 are connected with the rope 11 (figure 3), thus forming a flexible overlay 12 at the upper soil layer above the cavity with diamond ore. The refinement of the lower layer of the buried placers, including depression with diamond ore, produce systems with collapse under the protection of the flexible overlay 12.

For dissection of the lower layer is produced (figure 4), the driving of the generation 2 connecting adits 1, two longitudinal openings 13 to the intersection with the ore body. Then perpendicular to this observation wells 13 are transverse rassechku 14 (figure 4) and longitudinal framing 15 (figure 5). Resulting excavation blocks of the lower layer is cut by the cameras 16 (figure 4), leaving between them the supporting pillar 17, which work system block caving under the protection of the flexible overlay 12 (6).

Way layer testing of buried diamond placers calicium in the contours of the mine fields in cavities with diamond ore including mechanized mining of the upper layer of the cameras with the subsequent development of the supporting pillars and installation of flexible overlapping and testing system block caving of the lower layer including the trench with diamond ore, characterized in that the flexible ceiling mount only above cavities with diamond ore, and first mount the flexible overlay on the ground working cameras simultaneously with their training, and then on the ground working on supporting pillars simultaneously with their development, after which flexible overlapping adjacent chambers and the supporting pillars are connected.



 

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