Method for extraction of steep-falling and slanting deposits of low and average power with partial backfill

FIELD: mining industry.

SUBSTANCE: method includes preparation and well extraction of resources of chambers with partial backfill of extraction space. Blocks of upper level relatively to blocks of lower level are placed in staggered order, while blocks are made in form of a stretched upwards hexahedron. Resources of block within one hexahedron are separated on two chambers, one of which, placed along periphery of hexahedron, after extraction and removal of ore from it is filled by hardening backfill. Second order chamber is made of hexahedron-like shape, extracted and removed under protection from artificial block on all six sides of this chamber. Removal of ore from first order chambers is performed through one removal mine - end of level ort and cross-cut in lower portion of block and intermediate sub-level cross-cuts.

EFFECT: higher efficiency.

2 dwg

The invention relates to the mining industry and can be used in the development of steeply dipping deposits of small and average capacity.

The known method development steeply dipping deposits with incomplete (partial) bookmark cameras hardening mixtures, cement-based (A.S. No. 1270337 from 15.07.86,, E 21), which in a certain order are processed simultaneously three floors, which ensures the possibility to lay every third camera. The disadvantages of the method that Nadzaladevi only 1/3 goaf, which requires a great deal of consumption, binders, and low intensity of development of the reserves due to the scarcity of field of operations.

Also known is the method adopted for the prototype (A.S. No. 1162978 from 17.02.85,, E 21), which envisaged the notch stocks layers in the form of trenches, doing the form, fill it hardening bookmark, lay in her fittings for the connection of separate parts formed concrete structures. The disadvantages of the method: 1) a large volume of work execution as in mining ore and conduct filling operations; 2) in spite of the increased volume of work involved, the volume of unfilled voids is practically not more than half of the excavated volume of ore in the layer.

The invention is aimed at the improving the efficiency of field development at fuller utilization of mineral resources, the decline of labour-intensive and expensive preparatory-threaded openings, increasing the intensity of training and testing blocks (operational fields) and increase the production capacity of the mining enterprise, due to the fact that the blocks of the top floor relative to the blocks of the underlying floor have staggered, and the blocks are in the form of an elongated upwards hexagon, reserves unit within a single hexagon is divided into two chambers, one of which is located on the periphery of the hexagon, after blasting and release from it ore lay hardening bookmark, and the camera hexagonal shape of the second line beat and release under the protection of the artificial pillar with all six sides of the camera, and the ore from the chambers of the first stage are carried out through one final generation - the end of the story of ORT and Kerslake in the lower part of the unit, and the camera of the second stage through the ends of the floor Horta and Kerslake (at the bottom of the unit) and intermediate sublevel of crosscuts.

The invention is represented in the drawings, in which figure 1 is a projection on a vertical plane method development figure 2 is a vertical section along the line I-I.

The method is as follows. For mine the reserves of each floor is divided into a series of elongated blocks up the hexagon shape, priceblock in the underlying floor in a checkerboard pattern with offset on pablaka with respect to the blocks of the overlying floor. For the preparation of reserves for operation on each floor rocks lying flank being field drifts (1), from which each block are short crosscuts (races) (2) and Horta (3). Of these vectors are cutting itself (4) first angle is not less than 50-60°and then vertically to the upper level of the horizon, and drilled wells (5) at the same angle (not less than 50-60°). For blasting lateral parts of the blocks wells are drilled from the vectors of the overlying floor (6). Blowing wells on the cutting itself form a cutting gap and the blasting of wells for cutting a slit form the camera broken form, the length of which is equal to the horizontal thickness of the ore body. Release repulsed floor of the chamber ore operate through the end of ORT (3) and in (2). After the release of ore from the chamber of the first stage it is filled with hardening bookmark. The width of this camera is made depending on the stability of the wall rock and the strength of the bookmark. For blasting chambers of the second stage are intermediate field (sublevel) drift (7)check-in (8) and the drift of ore (9) or more sublevel drifts, crosscuts and vectors depending on the floor height, for the drilling of the stock camera of the second stage. In the middle of the camera - ore cutting itself (10), which is blowing wells cut in the cutting slot (11). After blasting and discharging the and ore chamber of the second stage remain non-pledged. This method ensures full recovery of the chambers of the first and second phases without significant dilution with a minimal amount of preparation is rifled and application of high technology water treatment works. The amount of bookmarks does not exceed 20% of the total volume of the block.

Method development steeply dipping deposits of small and average capacity with partial tab consists in preparing and borehole blasting reserves cameras with partial tab of the treatment space, wherein the blocks of the top floor relative to the blocks of the underlying floor have staggered, and the blocks are in the form of an elongated upwards hexagon, reserves unit within a single hexagon is divided into two chambers, one of which is located on the periphery of the hexagon, after blasting and release from it ore lay hardening bookmark, and the camera hexagonal shape of the second line beat and release under the protection of the artificial pillar with all six sides of the camera, and the ore from the chambers of the first stage are carried out through one final generation - the end of the story of ORT and Kerslake in the lower part of the unit, and the camera of the second stage through the ends of the floor Horta and Kerslake at the bottom of the unit and intermediate podat is the author of crosscuts.