SU720164A1 - Method of mining thick ore deposits - Google Patents

Description

one

The invention relates to the mining industry and can be used in the development of powerful ore deposits.

There is a method of developing powerful gently dipping deposits, including the design on the horizon of the release of the excavation panel ahead with shakhmat-located supporting pillars of the main hooking I.

The disadvantage of this method is the large supported area of the podconsole space, significant loss of ore in additional ridges behind supporting pillars when releasing broken ore.

There is also known a method of developing powerful ore deposits, including the breaking of ore with vertical layers, simultaneous drilling of the wall of the landing hook and the cantilever of the cantilever, breaking of the cantilever in the clamped medium, combining it with the formation of the donkey hooking, and releasing the broken ore of the layer to the console space 2.

The disadvantage of this method is the rather high loss of ore, the comparatively low safety of cleaning operations and the insufficient ventilation of the 04iiCTHoro slag.

In order to improve the efficiency of the clearing notch by reducing ore losses, improving the safety of cleansing operations and improving the conditions for airing the cleansing face in the proposed method, layer breaking and the formation of a solid undercut are made parts in the perpendicular direction of cutting parts of the layer to the general direction of layer extraction, and The main hooking of the next layer in relation to the layer being beaten is made ahead of time by an amount that is a multiple of the power of the part of the layer being beaten off. In addition, a temporary pillar is left between the layer to be taken out and the newly formed lava undercut of the subsequent layer, and the specified pillar is absorbed with advancement to the breaking of part of the layer by an amount multiple of the power of the part of the layer being beaten off.

FIG. 1 shows a schematic representation of the area being worked; in fig. 2 - section aa

Claims (2)

FIG. one; in fig. 3 shows a section BB in FIG. 1. Preparation of the site for the clearing recess begins with carrying out drifts 1 along the contacts of the ore body and forming a main sweep 2 across the deposit. The width of the console space is chosen from the conditions of free movement of loading and hauling machines or other means of drilling, production and delivery of broken ore along the main hook, which ensures the minimum area of exposure of the roof of the console space. Drilling of wells 3 to collapse an array of ore cantilevers and wells 4 to form a lavage sweep is carried out simultaneously. Console 5 longitudinal sweeps are redeemed by blasting wells with 3 separate sections in the perpendicular direction of excavation of layers of the layer to the general direction of excavation of layers. At the same time, the blasting of the wells 4 forms a new bottom cut, with an advance in relation to the front of the cantilever's redemption section by a multiple of the width of the cantilevered breakdown section. The magnitude of the advance in the formation of the main sweep is taken depending on the stability of the ore massif and is adjusted with changing geological conditions. Another variant of the method is possible, which consists in carrying out a main sweep with a leading slaughter. The pillars thus formed are repaid at the same time as the console of the main hook-up and ahead of the front of the console's redemption section by an amount multiple of the thickness of the redeeming layer of this section. The magnitude of the repayment step of the temporary pillar is also chosen depending on the stability of the ore massif. Since the formation of a new pit undercut is made ahead of the redemption front of the ore canal, the adjacent undercut spaces are interconnected, forming a chamber moving across the ore body, from which the broken ore is released. The production of broken ore 6 is carried out, for example, using self-propelled machines. The proposed method of developing ore deposits provides the following advantages over existing methods based on the use of laval sweeps: - increased stability of the roof of the console space by reducing the lateral span of the hook and reducing the seismic effect of the explosion on the console massif, since the console is redeemed in separate sections; this reduces ore loss on release; - improvement of ventilation conditions after mass explosions, since the console space is not filled with broken ore, which ensures free access of the ventilation jet to the place of production of cleaning works. Invention 1. A method for developing powerful ore deposits, including ore blasting with vertical layers, simultaneous drilling of the wall of the pit sweep and the beating console, blasting the console in the trapped medium, combining it with the formation of a pit sweep, and releasing the broken ore of a layer in the sub-copy space, distinguished by that, in order to increase the efficiency of the cleansing excavation by reducing ore losses, improving the safety of cleansing operations and improving the conditions for airing the clearing face, breaking the layer and azovanie longwall undercuts derivatives portions m in the perpendicular direction of the recess portion of the layer to the general direction of the recess layers wherein the formation of undercuts longwall subsequent layer relative to the layer is produced batters m ahead at a multiple of power slugger layer portion. 2. The method according to claim, characterized in that a temporary pillar is left between the layer to be removed and the subsequent layer formed again by the lava undercut, and the replenishment of the specified column is made ahead of the part of the layer by breaking the power of the layer. Sources of information taken into account in the examination 1. The author's certificate of the USSR 356353, cl. E 2i 41/06, 1969. 2.Pmenitov V.R. Technologists, mechanization and organization of production processes in underground mining of ore deposits. M., "Nedra, 1973, p. 377-378 (prototype). ): ShchSha Fa2.1 J , 2 A .2 / I-A