The method of development of ore deposits in hard rocks and device for its implementation

 

(57) Abstract:

The invention relates to the development of mineral deposits and can be used for development in hard rocks and the creation of mining and roadheaders. The invention is aimed at improving the efficiency of extraction of ore and mineral disclosure in hard rock. Method development of mineral deposits involves the destruction, shredding rudosoderzhaschuyu breed and disclosure of the mineral, which is produced simultaneously with the formation of a separated grains and crystals by acting on the surface of the ore body rock cutting element having physico-mechanical properties, identical physico-mechanical properties of the ore body. In the process of moving rock cutting element along the surface of the ore body it is simultaneously affected by the vibratory movement perpendicular to this surface. Device for the development of ore deposits gornodobychi harvester contains the working body with the rock cutting elements, a feeder of the combine to the bottom and move it in the shaft and the device for transportation of the smitten rock. Portorosa elements izgotovlenie from monolithic blocks of rock. The working body is arranged to move the rock cutting elements of the translational, rotational or translational-rotational along the surface of the ore body to swing them in the plane perpendicular to this surface. 2 N. p. F.-ly.

The invention relates to methods for development of mineral deposits and can be used to create the mining and tunneling machines for surface and underground development.

Known methods of development of ore deposits using tunneling and mining combines, consisting of the working body or bodies for mechanical destruction of the array of rocks, the feeder of the combine to the bottom and move to the bottom and device for transporting mass smitten rock.

Extraction with simultaneous grinding of rocks with the use of cutters, augers, rotors or milling cutters with carbide cutters destruction of solid rock occurs mainly on the trajectory of the cutting edges of the cutters and not by intergranular boundaries. It is not possible to ensure the integrity and the specified size of the grains of the useful component, that is, to ensure the election recriticality working body energy.

Other known methods of grinding and cosmelenia derived rocks, for example, the influence of shock waves, cyclic heating and cooling, electrostrictive, etc. have an even lower efficiency, but require more complex equipment and highly professional service.

Another significant drawback of existing methods of production with grinding is that they are not applicable when the hardness of the host rocks above 10-12 MPa (Protodyakonov).

The prototype presents the invention of the technical nature and purpose of the invention is protected by the RF patent №2062325, CL E 21 41/22, 27/00, publ. 1996 "the Way of the development of underground ore deposits and device for its implementation". The essence of this invention lies in the fact that the development of the ore body exercise tunnel-tunnel shield, which retrieves the breed zarubinym bar, crusher and special device, bring it to a state of pulp and passes to the hydraulic removal from the face.

The disadvantage of this invention is the low efficiency, due mainly to the fact that the product of the destruction of rock massif zarubinym bar is crushed to pieces, powder the pits crushing and grinding different devices. Now bringing the mass repulsed breed to a state of pulp is carried out multiple ustalosti-adamanateradam impact on particles fragmented mass in the device type, such as ball mills. Due to the low selectivity of disclosure of mineral grains in such devices inevitably education pereizmennoy and neosmaslenne factions, leading to the loss of ore mineral at the stage of enrichment. The education of the newly opened free of mineral surface in the grinding process of the fragmented mass of solid rock in existing devices for grinding ore consumes a small part of the consumption unit energy.

The aim of the presented invention is to improve the efficiency of extraction of ore and mineral disclosure in hard rock.

This objective is achieved in that with the aim of reducing the number of processing operations of the array of rocks and increase the effectiveness of the newly exposed mineral surface, combine the processes of production rudosoderzhaschuyu breed and disclosure of the mineral. To do this, in the mining combine, which consists of destroying the rock in olaronke derived rocks, Portorosa elements of the working body of the harvester are made of rock blocks and affect the surface of the ore body during rotational, translational or rotational-translational movement of rock cutting elements along the surface destructible ore body with simultaneous vibratory movement perpendicular to this surface.

The positive effect is due to the fact that the wear of rock cutting element of the working body simultaneously with the destruction of the surface of the ore body creates product production in the form of crushed rock. However, due to the identity of physico-mechanical properties of rock cutting element and the substance of the ore body, mutual destruction occurs with maximum energy efficiency, since it excludes the loss of energy on the deformation and wear of carbide rock cutting element and the maximum use of the mechano-chemical effect in the cracks.

The main advantage of the presented method of extraction is mainly intercrystallite the nature of the fracture mineral crystal aggregates of solid rock, due to existing and predominant normally requires a single destructive effect on the crystals and grains of useful mineral in their Department.

The intensity of impact on polycrystalline substance in the surface layers of the interacting surfaces has a threshold level of fatigue softening under the influence of multiple small magnitude of the pulse energy, leading to the formation of microcracks in the zones of contact and the development of them in the main macro-cracking with the further destruction of polycrystalline aggregates predominantly intergranular boundaries. Crystal aggregates patterns of the species are separated in the surface layer of destructible monolithic rocks and the surface of the destructive element with reduced losses on the plastic deformation in the generated threshold effect of pre-softening of the structure, leading to the formation of new free intergranular surface and loosening the treated surface of the breed.

The separated grains and crystals out of the zone vzaimoraschety surfaces of the ore body and destructive element due to their mutual displacement or under the influence of the cooling or venting of gas or liquid flow. The resulting milled mass will be dissolved or particulate form is transported, respectively, the x elements and breakaway pieces of rocks transported by known methods on plants for crushing and grinding.

Evidence of greater selectivity mineral disclosure proposed method compared with the traditional is that the particle size of the crushed material obtained by the proposed method in the experiments, largely corresponds polycrystallites the structure of rocks than those obtained from the same rock samples using the traditional way of separate mining and grinding.

Gornodobyche harvester for the development of ore deposits consists of the working body with the rock cutting elements representing the manipulator is equipped with a vibrator holder of rock cutting element, pnevmopodveska crushed rock and propulsion.

Harvester works as follows.

Mover, wheeled, tracked or vibration on the elastic elements, delivers the harvester on the wall of the shaft and provides the necessary clamping force. The manipulator moves along the surface of the ore body work body with vibrating rock cutting elements. Resulting from the interaction of the rock cutting elements with the surface of the ore body crushed material falls onto the floor of the pit, where he is sucked into the cracks of rocks destructive elements of the working bodies harvesters harvested from pillar rocks, generated in the process of implementation of the working body in the bottom breast in a specific pattern, determined by the nature of developed deposits and methods, or are made from solid blocks of rock produced by known methods.

The combination of extraction and selective disclosure of minerals directly in the mine to carry out a preliminary beneficiation and significantly reduce the amount of material excavated from the mine. In underground mining separated waste rock is ready component for backfill materials.

The economic efficiency of the presented method is caused by the elimination or significant reduction of the complex blasting in the mine cycle, reduction of volumes extracted from mines, rocks, reduction of the number of operations in the preparation of the ore for enrichment, improved particle size distribution of the prepared ore, minimize the use of filling materials, a reduction in the volume of transported material, a significant reduction or complete with the exception of the labor - intensive procedure of crushing rocks on concentrators.

It should be noted str labour in terms of the final product.

1. The method of development of ore deposits in hard rocks gornodobychi harvester, including the destruction and shredding rudosoderzhaschuyu breed, characterized in that destruction, shredding rudosoderzhaschuyu breed and disclosure of mineral produced simultaneously with the formation of a separated grains and crystals by acting on the surface of the ore body rock cutting element having physico-mechanical properties, identical physico-mechanical properties of the ore body, while in the process of moving rock cutting element along the surface of the ore body it is simultaneously affected by the vibratory movement perpendicular to this surface.

2. Device for designing ore mining combine, containing the working body with the rock cutting elements, a feeder of the combine to the bottom and move it in the shaft and the device for transportation of the smitten rock, characterized in that Portorosa elements made of monolithic pillars existing ore bodies formed during the implementation of the working body, or from solid blocks of rock, and the working body is made with the possibility displaced the ore body to the fluctuation in their plane, perpendicular to this surface.

 

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