SU1564348A1 - Method of excavating pillars on neighbouring ore deposits - Google Patents

Abstract

The invention relates to the mining industry and can be used in underground mining of contiguous ore bodies of horizontal and flat bedding. The goal is to reduce the cost of excavation, reduce dilution and increase work safety. In the underlying rocks of the lower reservoir, there are burrowing mines. The upper and lower reservoir pillars and the rock interlayer (BF) between the adjacent pillars of the uphole fan fans. By blasting charges in the wells, first beat off the upper parts of the pillars of the upper reservoir, collapsing overburden. Then they beat the pillars of the upper reservoir and the upper part of the PP, after which, by breaking down the lower part of the PP, they bring down the pedigree ceiling. In the last turn beat the pillars of the lower reservoir. The release is carried out under the collapsed rocks successively. At first they produce ore, repulsed from the pillars of the lower deposit, then they produce rock, repulsed from the PP, and after that they produce ore repulsed from the pillars of the upper reservoir. 4 il.

Description

The invention relates to the mining industry and can be used in underground mining of contiguous ore bodies of horizontal and hollow.

The purpose of the invention is to reduce the cost of excavation, reduce dilution and increase work safety.

FIG. 1 shows the drilling of pillars from the drilling parting workings and the breaking of the upper part of the pillars of the upper reservoir with the subsequent collapse of overlying roof rocks; in fig. 2 - breaking of the upper pillars and the upper part of the rock interbed; in fig. 3 - breaking down the lower part of the rock interbed and collapse of the rock ceiling on the soil of the lower deposit; in fig. 4 - release of ore from the pillars.

The method is carried out as follows.

Under the spent chamber-pillar system, a section of contiguous deposits, leaving intercameral rock ceilings 1, in the subterranean formations, there are burrowing mines 2 under each row of coaxially located pillars of the upper 3 and lower 4 deposits. From the drilling and groove workings, 2 with upward fans of wells 5 drill the pillars of the upper 3 and lower 4 deposits and the rock interlayer between them. After drilling, the pillars are charged and the bed cover is blown up in the pillars of the upper reservoir. As a result, collapse of overburden rocks of roof 6 occurs. Then, the pillars of the upper reservoir are crushed in a clamped medium and

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explode intervals of wells in the upper part of the rock interbed. After that, the well intervals in the lower part of the rock interbed are charged and blown up, breaking the rock ceiling I onto the soil of the lower reservoir. Then the pillars of the lower pool are beaten off in a clamped medium, and the shop of the broken ore 7 is produced under the collapsed rocks 6 to produce the bulkhead mine. In this case, first produce ore, repulsed

ascending wells along the pillars of the upper and lower reservoirs and the rock interbed between adjacent pillars, collapse of the rock ceiling between the reservoirs, breaking down the pillars in the upper and lower halls, and releasing ore under collapsed overburden, in order to reduce the cost of excavation , reduce dilution and increase safety of work, breaking the top

from the pillars of the lower reservoir, then the rock, the Yu pillars of the upper reservoir bring down the strand of the rock interbed, and after these rocks, then the pillars of the upper reservoir and the upper part of the rock interbed are beaten off; 15 lochina and in the last turn beat off the pillars of the lower deposit, and ore, recaptured from the pillars of the upper reservoir, are released after successive release of ore, repulsed from the pillars of the lower deposit, and release of the rock, broken off from the rock strata.

Go ore, repulsed from the pillars of the upper reservoir.

Claims (1)

Invention Formula The method of excavation of pillars in contiguous ore deposits, including the penetration in the underlying rocks of the lower reservoir of boring workings, drilling of fans ascending wells along the pillars of the upper and lower reservoirs and the rock interbed between adjacent pillars, collapse of the rock ceiling between the reservoirs, breaking down the pillars in the upper and lower reservoirs and ore production under the collapsed overburden, in order to reduce the cost of the excavation, reduce dilution and increase safety of work, breaking the top of pillars of the upper deposit bring down overlying rocks, then beat off the pillars of the upper reservoir and the upper part of the rock interbed, after which by breaking down the lower part of the pedigree interlayer bring down the rock heap and last of all beat off the pillars of the lower reservoir, and ore , released after successive release of ore, repulsed from the pillars of the lower deposits, and the release of rock, recaptured from the rock interlayer. 1 FIG. 2 figs Fig4