Procedure of development of thick steep pitched ore bodies

FIELD: mining.

SUBSTANCE: invention refers to mining industry and can be implemented at underground development of steep pitched deposits represented with unstable ore, under thickness of water-flooded sediments, excavation of which is connected with hazard of underground water inrush into mine workings. The procedure of development of thick steep pitched ore bodies consists in division of ore body into layers mined in descending order, in mining layers with cuts and in filling mined space with a solidifying material. Sections of location of cavities above filled massif and sizes of these cavities are determined by visual or instrument survey from cuts mined adjoined to the filled massif. Solidifying materials are supplied to places of after-filling in adjoined cuts using, for example a concrete pump equipped with the system of control over filling mixture supply. Cavities are after-filled in a divergent order in the direction off their boundaries, from uttermost adjoined cuts to adjoined cuts.

EFFECT: increased completeness of filling mined space, decreased space of mining auxiliary entries and increased safety of mining at development of deposits.

4 dwg

 

The invention relates to the mining industry and can be used in underground mining steeply dipping deposits, presents unstable ores, under a layer of waterlogged deposits, jobs which involve danger of breaking the groundwater in the excavation of the mine.

The known method development steeply dipping ore bodies (RF Patent No. 2209972, publ. 10.08.2003, AS 41/22). This method involves separation of the ore body on the layers together in descending order, the recess layer treatment benches and the mined-out space hardening materials.

The disadvantage of this method when developing powerful fields, presents unstable ores, is that its implementation is not provided fully mined-out space, resulting spontaneous collapse of the roof in the benches, the dangerous degree of destruction repeatedly undermined array and a high probability of breakthroughs groundwater in the excavation.

There is a method of development of steeply dipping ore deposits (Chesnokov NI, Petrosov A.A., Shevchenko B.F. System development of uranium deposits with hardening bookmark. Atomizdat, 1975, p.142-144)adopted for the prototype. The method involves separation of the ore body in layers, working in research Institute for agriculture which administers the order, the excavation of the layers of the benches and the mined-out space hardening materials.

For the production of filling operations above the first layer by ore body or an empty rocks are filling the roadway, and in filling the array choose to unpin it itself, designed to bypass backfill material backfill drifts to the benches.

The disadvantages of this method when developing powerful fields with unstable easily collapsing ores are the difficulty of ensuring complete laying-out space without leaving cavities (voids) between filling the array and the roof of the working layer; the large extent of the special backfill excavations (stowing itself, backfill drifts and others), which are held and maintained repeatedly undermined array; increased risk of mining operations associated with the collapse of the roof in the benches and breakthroughs groundwater in the excavation of the mine.

When carrying out the known method (prototype) between the roof faces and filling the array created in the benches usually have a cavity, the height of which is measured in tens of centimeters. The presence of these cavities due to technical difficulties filling benches backfill material, and "shrinkage" zakladochnoj the array to its hardening (carburizing) under the action of gravity. The magnitude of the shrinkage reaches 3.5% or more the height of the backfill array.

The presence of cavities between the roof faces and filling the array when using the known method results:

- repeated lowerings undermined backfill and upstream of the rock mass, the increase in the degree of its destruction and, as a consequence, increasing the probability of breakouts water in the underground workings of the upstream aquifers;

- to the emergence of zones of high rock pressure over the boundary parts of the ore mass, resulting collapse of the roof and sides of the benches.

The technical result of the proposed method is to increase the fullness of the laying-out space, reducing sinking auxiliary preparatory workings and improving the safety of mining operations in the mining fields unstable easily collapsing ores under the aquifers.

The technical result is achieved that the way to develop powerful steeply dipping ore bodies produce separation of the ore body on the layers together in descending order, seizure layers carry benches, stope lay hardening materials.

According to the invention of the benches, a passable presecco to backfill array (priceon the e Zachodni), visual and instrumental observations define the regions (places) the location of the cavities above the backfill array and the sizes of these cavities produce feed hardening materials to DataBlade on Pasechnik the benches using, for example, concrete pumps, equipped with a flow regulating system of filling mixture, while DataBlade cavities are retreating in order in the direction from the boundaries of the cavities, the most remote from Pasechnik benches, Pasechnik the benches.

How to develop powerful steeply dipping ore bodies is illustrated by drawings, figures 1 and 2.

Figure 1 shows a schematic diagram of DataBlade filling cavities between the array and the roof of the working layer feed hardening materials to DataBlade on Pasechnik the benches using, for example, of concrete pumps.

Figure 2 is a diagram explaining the sequence of hardening filling material cavity located between filling the array and the roof of the working layer.

Figures 1 and 2 are marked: 1 - ore array; 2 - filling the array; 3 - roof bar frame lining pricecell Zachodni; 4 - rack frame supports pricecell Zachodni; 5 - concrete pump; 6 - filling pipe; 7 - the border of the cavity above the backfill array; h is the layer thickness; and1and2, the 3and a4accordingly, the width of the first, second, third and fourth zagadki.

The method is as follows. The ore body is divided into layers with a capacity of h, which work in descending order (figure 1). The extraction of ore within the layers produced by the benches. Stope lay hardening materials. From benches, a passable presecco to backfill array 2, visual or instrumental observations define the regions the location of the cavities above the backfill array and the sizes of these cavities. So, during pricecell Zachodni width and2(1) determine the location of the cavities and the size of these cavities over filling the array created in the section width and1. When conducting pricecell Zachodni width and3determine the location of the cavities and the size of these cavities over filling the array created in the previous benches width of a1and a2. When conducting pricecell Zachodni width and4determine the location of the cavities and the size of these cavities over filling the array created in the previous benches width and2and a3.

Information about the locations of cavities over filling the array and the size obtained by visual or instrumental observations of the benches,a passable presecco to filling the array is the most reliable. This information allows to significantly increase (in comparison with known methods) completeness laying-out space, which is achieved by the correct definition for each cavity of the necessary amounts of filling mixture and knowledge of the locations of the highest points laying voids. When implementing the proposed method also provides for the possibility of Pasechnik benches constant visual monitoring of the process of DataBlade, which also increases its completeness.

Produce feed hardening materials to DataBlade on Pasechnik the benches using, for example, concrete pumps 5, equipped with a flow regulating system of filling mixture. The use of these pumps allows you to completely lay cavity of almost any size and configuration. Concrete pumps can be installed both in Pasechnik the benches and beyond.

DataBlade cavities are retreating in order (figure 2) in the direction of the borders of these cavities, the most remote from Pasechnik benches, Pasechnik the benches. In this example, at the beginning of dsaklad cavity is produced when the outlet backfilling pipe in position "b", then "C" and "e". This sequence of filling operations poses which enables you to improve the completeness bookmarks cavities due to the exclusion of occurrence in filling array of air pockets, as well as the possibility of visual control over the process of DataBlade taking into account the actual angles of spreading backfill material.

Taking into account the fact that by the time you start DataBlade is almost complete shrinkage of the main filling mass under the action of its own weight, the use of the proposed method eliminates the possibility of further filling of voids between the array and the roof layers associated with shrinkage backfill array.

The inventive method is useful for the development of steeply dipping deposits, with unstable ores and host rocks. The greatest effect from the use of the proposed method is achieved by the development of steeply dipping deposits, presents a powerful unstable deposits of ores beneath the flooded sediments rocks, jobs which involve danger of breaking the groundwater in the excavation of the mine. These fields include, for example, Yakovlevsky mine rich iron ore.

Using the proposed method allows to produce almost complete the mined-out space, which eliminates the threat of destruction undermined the mountain massif and breakthroughs water from aquifers underground mining is robotki; to reduce the frequency of wood thrown of the roof and sides of the benches; to use the benches lining cheaper and simple designs.

How to develop powerful steeply dipping ore bodies, including the separation of the ore body on the layers together in descending order, the recess of the layers of the benches and the mined-out space hardening materials, characterized in that from the benches, a passable presecco to filling the array, visual or instrumental observations define the regions the location of the cavities above the backfill array and the sizes of these cavities produce feed hardening materials to DataBlade on Pasechnik the benches using, for example, concrete pumps, equipped with a flow regulating system of filling mixture, while DataBlade cavities are retreating in order in the direction from their borders, the most remote from Pasechnik benches, Pasechnik the benches.



 

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EFFECT: higher efficiency.

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