RU1798500C - Method for mining inclined and steep lodes - Google Patents

Abstract

The invention relates to the mining industry and can be used in underground mining. Thin and medium power sloping and steeply dipping wires. The purpose of the invention is to reduce the volume of threaded work while maintaining the quality of the ore mined. The development is carried out in blocks. Floor and floor floors are carried out. In the bottom of the block there is an inclined working at an angle of gravity transport. A cut-off rebellion is carried out on the flank of the block. A guard pillar is formed between the cutting insurgent and the border of the block. Block mining is carried out from top to bottom with ore breaking by wells. The host rocks are drilled with wells of reduced diameter, charged and blown up. The mined-out space is filled up with the collapse of the pieces of the host rocks following the mining of the block reserves. Moreover, the average size of the pieces is greater than the power of the core. The bottom of the upper sub-floor block is knocked down on collapsed enclosing rocks. The guard pillar is formed temporary from the ore mass of the block. 2 ill. (L C

Description

The invention relates to the mining industry and can be used in underground mining of thin and medium power sloping and steeply dipping cores.

The purpose of the invention is to reduce the volume of rifling operations while maintaining the quality of the ore mined.

On Fig, 1 presents a longitudinal section through the core with one spent block and the other prepared for mining; Fig. 2 is a section A-A in Fig. 1, where 1 and 2 are floor drifts: 3 is a vibratory feeder for discharging ore from inclined workings 4 and 7 installed in a niche 6; 8 - detachable uprising, which is carried out using the CPV or CPN complex; 9 - sub-floor drifts; 10-13-ore pillars; 14th border

block; 15 - wells of large diameter; 16 - wells for breaking ore.

The method of mining ore veins is as follows.

Ore veins are broken by drifts 1 and 2 vertically into floors, horizons into blocks. At the level of the roof of the lower drift, a niche passes at the block border. 6 for placement of a mechanized complex and vibratory feeders An inclined mine working 7 passes from a niche 6 at an angle providing gravity transport of ore through it.,

From the inclined mine working 7, a detachable insurrection 8 passes to drift 2. From a detachable insurrection 6, notches are made, then sub-floor drifts 9 to a detachable insurrection 5, passed in the neighboring

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block. Between the boundary of block 14 and the cutting insurgent 5 in the ore mass, a guard pillar is made up.

At the beginning of the vein mining, a detachable insurrectionary passage passes along the boundary of the ore body.

Block development is carried out in descending order.

Initially, from the drift 2, the whole vein is drilled entirely with 10 wells of reduced diameter and the ore is beaten in a clamp on previously collapsed overburden or on a cutting uprising in the event that the worked-out space is laid by a hardening tab, Ore pillars 11, 12 are beaten off simultaneously with the whole guard wells of reduced diameter on a cutting uprising 5 in a retreating order. Ore is passed through inclined mine 4 into a niche 3 onto a vibratory feeder, which is used to discharge ore and load vehicles located at the drift 1. Ore pillar 13 is beaten downstream wells of reduced diameter simultaneously with the pillar ore 12.

Ore pillars 1.1-13 beat off to the border 14 of the guard pillar, Ore pillar 10 beat off when mining ore veins below the lying horizon. In the absence of ore below the drift 2, the pillars 10 are worked off by the end method with the release of ore to mine 2.

After mining the ore pillars 10-13, wells 15 are drilled, drilled with an increased diameter in the host rocks from the sub-floor drifts 9 in the guard pillar.

The diameter of the wells 15 and the grid of their placement are selected in such a way that, when the overburden is destroyed, pieces with dimensions exceeding the thickness of the core are obtained.

When mining an ore vein in weak rocks after working off pillars 10-13, it is possible to use the bookmark option from 0

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the worked space with a hardening mixture.

When mining an ore core in particularly hard rocks, it is possible to mine an ore body without undermining the host rocks.

The ore is discharged through a niche 6, with the help of vibrating feeders 3 into transport vessels to the haulage drift 1.

The proposed mining method reduces the volume of rifling in the bottom of the block by 40%, simplifies the technology of ore delivery and reduces labor costs when it is delivered through the block and loaded into transport vessels.

Formula of the invention A method for developing inclined and steeply falling ore veins, including carrying out floor and sub-floor drifts, sinking into the bottom of a block of inclined workings at an angle of gravity transport, conducting a cutting insurgent on the block flank, forming a guard pillar between the cutting insurgent and the block border, mining of block reserves by sub-floors to the borders, guard pillar with ore breaking by wells of reduced diameter, filling of the worked-out space, characterized in that, in order to reduce the volume of cutting operations while maintaining the quality of mined ore, mining the reserves of the block is carried out from top to bottom, the array of enclosing rocks is drilled with additional blast holes of increased diameter, the filling of the worked-out space is carried out after mining of the reserves of the block by the collapse of the enclosing rocks in pieces whose average size is larger than the core core, the bottom of the upper block the sub-floors are beaten to collapsed enclosing rocks, and the guard pillar is formed temporarily from the ore mass of the block, while drilling additional wells travel from sublevel drifts in said protective pillar.