RU2310075C1 - Method for block bottom creation in upward ore deposit mining - Google Patents

Abstract

FIELD: mining, particularly to develop steep ore deposits in upward order.

SUBSTANCE: method involves sinking hauling entry of overlaying level, field incline, drive connecting hauling entry with chamber, sub level field entry, drive communicated with drill drift and ore drill drift; drilling well ring to upper overlaying chamber undermining mark; cutting ore; discharging and unloading cut ore; filling chamber goaf with pourable rock filler, wherein the rock filler is supplied directly from drives in chamber from hauling entry of overlaying level and rock filler is distributed over chamber area and compacted with the use of earth-moving machinery to create flat bottom.

EFFECT: decreased ore costs and volume of work in block, decreased ore losses due to total ore loading and block bottom cleaning with casing packer with remote control.

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Description

The invention relates to mining and can be used in the development of steeply falling ore mineral deposits in ascending order.

There is a method of creating a trench bottom of a block with an upward order of work, which consists in testing the upper fans of the wells when breaking the ore in the downstream chamber, releasing the beaten ore through the trench of the downstream chamber and filling the chambers with a rock fill through the workings of the filling horizon, passed in the rocks of the hanging side (Minaev Yu .L., Minaev D.Yu. Method for the development of steeply falling ore deposits (Patent RU 2229600 C1 E21С 41/22 dated 04.11.2002).

In the above method, the development of the filling horizon is positioned at such a height from the working outs of the recoil horizon of the upper block that the conditional line drawn from the bottom of the recoil horizon of the upper floor to the bottom of the filling horizon is inclined to the horizon at the angle of repose of the loose rock bookmark. In this case, a loose rock bookmark is located along this line, creating a trench with an inclination angle equal to the angle of repose of the rock mass. When mining the upstream chamber, the ore beaten to the trench formed by the loose rock laying is gravity delivered to loading races, where it is loaded into self-propelled loading and delivery vehicles (PDM).

The disadvantages of the above method of creating the bottom of the block is:

1. The need to conduct workings of the filling horizon, serving exclusively for the supply of filling material.

2. Loss of ore on the bottom of the block in the intervals between loading races.

3. The inability to control the quality of the created trench neither visually nor instrumentally.

These shortcomings increase the cost of rifling in the block and increase the cost of mined ore, increase the loss and dilution of ore in the block.

The technical result of the invention is to eliminate these drawbacks, namely, reducing the cost of ore mined, reducing losses and dilution of ore in the block.

The technical result is achieved by the fact that in the method of creating the bottom of the block in an ascending order of development of ore deposits, including carrying out a haul-off drift of an upstream floor, a field slope, arrivals in a chamber from a haul-off drift of an upper floor, a sub-floor field drift, a run on a drill drift, an ore drill drift, drilling of fans of wells to the upper elevation mark of an upstream chamber, breaking of ore, production and loading of broken ore, filling the mined-out space of a loose chamber According to the invention, a loose breed bookmark is fed directly from the races into the chamber from the haulage drift of the upper floor, which is distributed over the chamber area and compacted with bulldozers, thus creating a flat bottom.

The essence of the proposed method is illustrated by drawings, where:

figure 1 - breaking the ore with fans of wells drilled to the upper elevation mark of the upstream chamber;

figure 2 - filling the chamber with loose rock bookmark;

figure 3 - distribution of loose rock bookmarks on the area of the chamber;

figure 4 - loading beaten ore in the upstream chamber PDM;

1 - arrivals into the chamber from the haul-off drift of the upper floor;

2 - haulage drift of an upper floor, at different periods of time performing transport, ventilation and filling functions;

3 - field autotilt;

4 - race to the drift;

5 - sub-floor drift;

6 - loading rides from the haulage drift of the worked floor;

7 - haulage drift worked floor;

8 - drill drift;

9 - wells;

10 - hooking upstream camera

11 - dump truck;

12 - loose breed bookmark;

13 - bulldozer;

14 - PDM with remote control;

15 - operator controlling the PDM remotely;

16 - a flat bottom with a base of vibro-compacted rock bookmarks;

17 - pile of broken ore.

The method is as follows. With the ascending order of mining floors within the field, a retractable drift 2 of an upstream floor is passed by drilling and blasting, at first it is a ventilation drift for a worked floor, 1 enters the chamber from a retractable drift of an upper floor after 10-12 meters along the ore body, field auto-grade 3, sub-floor drift 5 , run 4 at the drill drift and drill drift 8. Then start the ore mining recess, while the wells 9 are drilled to the upper mark of the cutoff 10 of the upstream chamber (Fig. 1). After the release of ore, a loose rock bookmark 12 is supplied from arrivals 1 to the chamber from the haulage drift of the upper floor using underground dump trucks 11 or PDM, unloading it directly into the chamber (Fig. 2). Using bulldozers 13, the bookmark is distributed over the area of the chamber, and the vibrator, additionally installed on the bulldozer, compacts the upper layer of the pedigree bookmark and increases its density, thus creating a smooth and durable surface of the flat bottom 16 (Fig. 3). When mining the upstream chamber (Fig. 4), the ore is chipped off onto a flat bottom 16 with a base from a vibro-compacted rock bookmark, and the bulk of the broken ore 17 is removed using self-propelled PDM 14 with remote control, while the operator 15 is in loading run 1 of the rolling shutter 2 upstairs floor and is managing PDM remotely.

The application of the proposed method for creating the bottom of the block reduces the cost of mined ore, reduces the volume of threaded work in the block, reduces ore loss by loading all ore and cleaning the bottom of the PDM block with remote control.

Claims (1)

A method of creating a block bottom in an ascending order of mining ore deposits, including carrying out a haulage drift of an upstream floor, a field auto slope, arrivals into a chamber from a haulage drift of an upstream floor, an underfloor field drift, a run on a drill drift, an ore drill drift, drilling of borehole fans to the upper mark upstream chamber, ore breaking, release and loading of beaten ore, filling the mined chamber space with a loose rock fill, characterized in that This pedigree bookmark is served directly from the races into the chamber from the haulage drift of the upper floor, which is distributed over the chamber area and compacted with bulldozers, thus creating a flat bottom.

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