SU602684A1 - Method of mining mineral deposits - Google Patents

Description

The invention relates to mining and can be used in the underground mining of high value mineral deposits in insufficiently resistant fractured rocks.

There is a known method for the development of useful t fossil deposits in horizontal layers from top to bottom with a hardening bookmark consisting in drilling and transportation of broken ore by loading and dividing by press machines 1.

The disadvantage of this method is the lack of productivity of labor due to the drilling of ore and the use of small capacity scrapers.

The closest to the proposed method is the development of mineral deposits in horizontal layers from top to bottom with a hardened bed and with the use of payload-delivery machines 2.

The disadvantage of this method is that labor productivity is low due to the cyclical nature of the operations of the clearing notch, as well as the maintenance of explosive workings directly under the artificial roof, as a result of which its integrity is impaired, which causes a split in maintenance of the developed space.

In order to increase labor productivity, the excavation of layers is carried out after the preliminary destruction of useful mineral deposits. blasted downhole charges within the whole block (substage), and the destruction of the mineral below the block (substage) begins to be produced under a layer of broken ore sufficient to protect the cleaning space from the explosion. At the same time, the destruction of a mineral within the whole block (rating) is carried out with a coefficient of loosening that does not violate the structure of the ore body.

Claims (2)

On ф г, 1 the ore body is shown, a vertical section (section А-А on ф г, 3); in fig. 2 shows a section BB in FIG. one; in fig. 3 shows a section B-B in FIG. one; in fig. 4 shows a section in FIG. 1. On the flanks, ventilation openings 1 are passed | in the central part of the block there are ore passes 2 and an inclined exit 3. All preparatory workings are made in the rock. Additionally, along the strike of the ore body, subsurface mine workings 4 are made for preliminary mastering of an array of mineral fossil fan. wells. The height of the substage is taken as a multiple of the height of the layer to be removed and depends on the complexity of the configuration of the ostral body. In the center of the block, across the subsurface of the ore body, at each substage, the incision 5 is formed to form a compensatory space 6 by means of fan holes 7. The ore is crushed and cleaned to form the SRI of the compensation space is retreated in the direction of the ore-run 3. At this time In the upper substage, it should be 2-3 layers higher, so that blasting does not affect the cleaning space of the working layer. . The parameters of the compensation space and the parameters of the drilling and blasting operations (drilling and blasting) are determined by calculation, based on the volume of the destroyed rock mass, the required loosening coefficient and other mining and technical factors. As the upper floor is dredged and covered with bookmark 8, the drilling operations are transferred to the underlying Sub-floor and the mining cycle repeats. Before the beginning of the excavation of ore in each. The layer passes the transport production layer 9, from which the mining of ore is carried out in several steps at the same time towards the flanking rebels. The top-down bookmark redemption is done through rising 10, which is erected in an artificial array as the clearing recess moves. The excavation of a pre-crushed massif can be carried out with the extensive use of modern loading and delivery self-propelled equipment such as KA-125/1000, MPDN, loading machines with reloading machines, bucket loaders and others using mechanical impact on the face to crush ore using jackhammers. The principle of pre-destruction of the mineral massif, art. HNL-1, H & Y - 4 and Becoria Impact Ripper (Germany), Using the proposed method of mineral increases the safety of ropiibLX works under artificial roof by eliminating the seismic effect of blasting on it, it is therefore possible to reduce the consumption of cement in the bookmark and increase its strength. In addition, drilling productivity is improved by switching from hole blasting to borehole drilling and cleaning due to an increase in the utilization rate of loading and hauling machines during the shift. Fracture of the mountain massif, which is a negative factor in the usual method of excavation, which makes mining operations difficult, in the proposed method contributes to an increase in labor productivity. Mineral blasting, produced with a low coefficient of loosening, in which the basic morphological features of the ore body are not disturbed, eliminates significant movements and mixing of the ore mass with empty enclosing porous jv-Mo Formula of the invention 1, Method of mining mineral deposits mi from top to bottom with a hardening tab, characterized in that, in order to increase labor productivity, the layers are made after the preliminarily destroyed Mineral downhole blasting charges within the whole block (substages), the decomposition of minerals lower block (substages) begin to produce a layer of destroyed ore sufficient to protect an area from the cleaning action of the explosion, 2. The method according to claim 1, wherein the destruction of the mineral B within the whole block (substage) is carried out with a loosening coefficient that does not violate the structure of the ore heat. Sources of information taken into account during the examination: 1. G. Popov. Technologists and Complex Mechanization of the Development of Ore Deposits, M. Nedra, 1970, p. , 2. Bronnikov DM and others. Fundamentals of technology for underground mining of ore deposits with a bookmark, M, Nauka, 1973, p. 33-35.