SU840366A1 - Method of working sloping ore bodies - Google Patents

Description

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

There is a method of developing steeply falling ore bodies of medium power by a sub-floor collapse with a face ore output, where the ore is released simultaneously to the drift and to the ort [1].

The disadvantages of this method are large losses and dilution of ore.

There is also known a method of developing steeply falling ore bodies, including sinking drilling holes, breaking the ore block in a fan fan holes under collapsed rocks, with the displacement of adjacent blocks in height and the face release of the beaten ore from the mine workings simultaneously from several sides [2]

However, the method has a relatively low intensity of mining blocks, large losses and dilution of ore.

The purpose of the invention is to increase the intensity of mining blocks, reducing losses and dilution of ore.

The goal is achieved by the fact that at the equal distance from each other, continuous drilling workings pass along the strike and across the strike, and the blocks formed at the same level are staggered in a horizontal plane and after the blocks are blasted, the ore is mined from them simultaneously from four sides on the lower sub-floor, while the blocks located on one level are displaced relative to adjacent blocks located on another level by the height of the sub-floor.

In FIG. 1 shows the ore body along strike, section; in FIG. 2 — section A — A in FIG. 1; in FIG. 3 - section B — B in FIG. 1.

On each floor (sub-floor) are field delivery drifts 1 and. along the ore body are mutually perpendicular borehole unit 2 and drifts 3, located at an equal distance from each other. Blocks 4, formed at the same level, are placed in a horizontal plane in a checkerboard pattern. Blocks 4 located at one level are offset relative to blocks 5 located at another level by the height of the sub-floor. After cutting on the lower sub-floor of the block of the cutting gap 6, for breaking into it, fans of wells 7 are drilled and in the upper part of the block of fan 8 for breaking into exposed planes of the ore mass. After breaking off the reserves of the block, ₅ chipped ore 9 is discharged from the drill holes and from all four sides of the block.

As a result of the fact that the blocks are shifted to the sub-floor height along the strike and across the strike, the lower part of each block 10 is bounded on all sides by an unbroken array, which eliminates losses and dilution from contact with collapsed rocks over the entire height of the block, especially at the final stages of release, and also the unequal arrangement of the ends of the exhaust workings ¹⁵ relative to contact with the collapsed rocks.

Simultaneous breaking and release of ore from exhaust openings on four sides of the block increase the intensity of mining of blocks by at least two times and reduce losses and dilution from uneven movement of different sections of the beaten ore to exhaust openings.

The combination of the center block moving velocity of broken ore on the influence of different GOVERNMENTAL openings ²⁵ can increase the overall speed that eliminates the speed of movement of broken ore on the unit area and reduces the loss of ore from ore ridge unreleased at the block center. _{On the} other hand, expansion at от _{3 £)} ore stripping in the upper part of the block reduces losses and dilution when this ore is released from contacts with collapsed rocks in the upper part of the block; when ore is released from the lower, only the upper contact with the ore affects losses and dilution 35 breed rocks.

4,

Using the proposed method reduces losses and dilution when released under collapsed rocks. In addition, due to the increased intensity of mining blocks reduced the cost of maintaining the preparatory rifling workings due to a shorter period of their existence.

Claims (1)

(54) THE METHOD OF DEVELOPING A STEEPFALLING ORE BODIES to the height of the substage. After cutting on the lower substage of the block of the cutting slit 6, the fans of the wells 7 are drilled to break it down and in the upper part of the block of the fan 8 to break down on the exposed planes of the ore body. After the block has been crushed, the production of broken ore 9 is made from drilling outlets and on all four sides of the block. As a result of the fact that the blocks are shifted to the height of the substage but to the strike and across the strike, the lower part of each block is bounded on all sides by the unbroken array, which eliminates loss and dilution from contact with the collapsed rocks throughout the entire height of the block, , as well as the unequal location of the ends of the exhaust workings with respect to contact with the stoned rocks. Simultaneous blasting and removal of ore from exhaust workings on the four sides of the block increase the intensity of mining blocks no less than two times and reduce losses and dilution from the uneven movement of different sections of broken ore to exhaust workings. Combining in the center of the block the speeds of movement of broken ore from the influence of different mines increases the overall speed, which eliminates the speed of moving the broken ore over the block area and reduces the amount of ore from the ridge of unreleased ore in the center of the block. At the same time, the destruction of ore in the upper part of the block reduces losses and dilution when this ore is released from the contacts of the erupted rocks in the upper part of the block. When the ore is released from the lower, only upper contact with the collapsed rocks affects the loss and dilution. Using the proposed method reduces losses and dilution when released under collapsed rocks. In addition, due to the increased intensity of block mining, the cost of maintaining preparatory rifled workings is reduced due to their shorter lifetime. Formula of the Invention A method of developing steeply dipping ore bodies, including drilling drilling discharge workings, breaking the block ore by clamping wells with the fans under the collapsed rocks, displacing adjacent blocks along their height and producing ore from drilling discharge workings simultaneously from several sides, because in order to increase the intensity of mining, reduce losses and dilute the ore, at each substage an equal distance from each other along the strike and across the strike there is a flat drilling outlet production, and the blocks formed on the same level are arranged in a horizontal plane in a shakhmatny order and, after the blocks are broken, the ore is released from simultaneously, from four sides in the lower substage, while the blocks located on the same level are displaced relative to adjacent blocks, located on a different level, to the height of the substage. Sources of information taken into account in the examination 1 USSR author's certificate No. 583307, cl. E 21 C 41/06, 1976. 2Authorial certificate of the USSR 308198, cl. E 21 C 41/06 ,. 1970.