SU899958A1 - Method of mining ore deposits - Google Patents

Description

(54) METHOD FOR DEVELOPING NATIVE ARMS

one

The invention relates to mining and can be used in underground mining of ore deposits with systems with the collapse of ore and host rocks.

Known is the development of ore deposits, which includes carrying out workings with their displacement in a shakhmatny order on adjacent sub-floors and breaking down reserves on two sub-floors, leaving the pillars on the lower sub-floor 1.

The disadvantage of this method is high ore recovery rates.

The closest to the invention by the technical essence and the achieved result is a method of developing ore deposits, including making workings with displacement in a shakhmatny order on adjacent sub-floors and positioning along a square grid with distances between the centers of workings equal to the small axis of the ellipsoid of release, and the height of the substage equal to the greater half-axis of this ellipsoid, and the breaking of stocks on two sub-floors, leaving the pillars on the lower substage 2.

The disadvantage of this method of developing ore deposits is that the formation of the release body as an ellipsoid of rotation is not ensured, and therefore, the extraction rates of the ore are reduced.

The purpose of the invention is to increase ore recovery rates and ensure independent discharge from each outlet.

The goal is achieved by the fact that

Claims (2)

Q according to the method of developing ore deposits, including making workings with their displacement in a checkerboard pattern on adjacent sub-floors and located on a square grid with distances between the centers of workings equal to the minor axis of the output lipsoid, and the height of the sub-floor equal to the greater semi-axis of this ellipsoid, and the breaking of stocks on two sub-floors, leaving the pillars on the lower sub-floor, breaking down the stocks in the lower sub-floor, produced 2 tons of water, simultaneously with the breaking of the pillars of the upper sub-floor, in trenches in two mutually perpendicular pressures The formations with the remaining pillars in the form of truncated pyramids to the full height of the sub-floor between the four adjacent final workings. FIG. 1 shows a diagram of the excavation of the ore body; in fig. 2 shows a section A-A in FIG. in fig. 3 shows a section BB in FIG. 2; in fig. 4 shows a section B-B in FIG. 2, 3; in fig. 5 is a section of YYD in FIG. 2. On each sub-floor, delivery horts 1 are made, which are then used as drilling workings, races 2 and exhaust workings 3. The distance between the centers of the exhaust workings 3 is taken to be equal to the minor axis of the ellipsoid 4 release, the height of which is twice the accepted height substage. After mining the overlying blocks, temporary losses of ore 5 are formed at the edges of the pyramidal pillars 6. In the overlying sub-floor, additional drilling orts 7 are carried out in the spacing between the delivery orts 1 and the pyramidal pillars 6 and the supra pillars of the orts 1 and 7 are drilled. Drilling drifts 8 are conducted to the underlying substage, on which an array is drilled for excavation of the trench, leaving four adjacent mines of pyramidal truncated pillars in the center of the world. The exhaust workings are carried out in a staggered displacement on adjacent floors and placed on a square grid with distances between the centers l} iiipa6oTOK, equal to the minor axis of the ellipsoid, the larger axis of which is twice the height of the sub-floor. Breaking down the block reserves in the lower substage is done by simultaneously crushing the pillars of the upper substage of tran (by two mutually perpendicular directions, leaving the pyramidal truncated pillars to the entire height of the substage. The pyramidal pillar creates a solid body close to each to the ellipsoid. The formation of the upper part of the body of rotation occurs due to the deposition of broken ore on the faces of the pyramidal pillars in the form of temporary losses, the shape of which is in contact with the collapsed pores Odes, due to the formation of the introduction funnel at the release, is obtained close to the shape of the upper part of the release ellipsoid. When the pyramidal pillar is broken, its expansion and compaction of the rocks around it occurs in all directions. At the same time, the shape of the body formed from the broken ore is not distorted and does not shift relative to the vertical the axis of the outlet. The lower part of this body to be discharged through this outlet is bounded by the edges of the pyramidal pillars left on the lower substage it is in the ore and does not border collapsed rocks. Therefore, on the underlying substage, pyramidal pillars limit the zone of influence of each outlet. As a consequence, the deflection of the axes of the bodies of release does not occur. With this method of mining, the ore deposits of the output body do not intersect with each other, therefore there is no need to increase the recovery rates to ensure uniform ore output over the area from all exhaust workings, which is always difficult to implement in practice. In addition, this method allows for the separate breaking and release of ore from each block per discharge outlet. With the same height of the substage in two phases, the distance between the exhaust output can be increased compared with existing methods, which increases the stability of the block bottoms. Claims of the Invention The method of developing ore deposits, including making workings with displacement in a staggered order on adjacent sub-floors and positioning on a square grid with distances between the centers of workings equal to the minor axis of the ellipsoid of release, and the height of the sub-floor equal to the greater semi-axis of this ellipsoid, and breaking down stocks on two sub-floors, leaving the pillars on the lower substage. characterized in that, in order to increase the ore recovery rates and ensure independent output from each outlet, the breaking of reserves in the lower sub-floor, along with the breaking of the upper sub-floor, in trenches in two mutually perpendicular directions leaving the pillars in the form of truncated pyramids to the full height of the substage between the four adjacent exhaust workings. Sources of information taken into account in the examination 1. USSR author's certificate number 386139, cl. E 21 C 41/06, 1966. 2. USSR Author's Certificate No. 754066, cl. E 21 C 41/06, 1977 (prototype). 1 J ( Fig.Z