Method for ventilation of development entries by way of slanting horizontal wells bored from surface

FIELD: mining.

SUBSTANCE: method for ventilation of development entries by way of slanting horizontal wells bored from the surface involves delivery of fresh air into the well due to general shaft depression and discharge of the outgoing air stream along main entries and the well. The shaft of the slanting horizontal well bored from the surface is positioned within a protective pillar between coupled development entries being arranged; discharge of the outgoing air stream from the development faces is performed through the breakthrough closest to the faces that intercepts the well shaft and with the help of a vacuum pump installed on the surface at the well mouth.

EFFECT: provision for independent ventilation of coupled development entries and extraction faces and reduced scope of full-faced entries being arranged.

2 dwg

 

The invention relates to the mining industry, and in particular to coal, and can be used in coal mines to the organization ventilation coupled preparatory workings.

There is a method of ventilation of mines held by vysokogazonosnyh and outburst coal seams (patent SU # 1624182 A1, CL E21F 1/00, published 30.01.1989 year), including fresh air into the mine through mine depression, the outgoing exhaust air stream on the main workings and wells drilled from the surface, additional Central and flanking mine workings.

The disadvantage of this method is that there is an increase in the volume of the workings of the mine and there is a risk of rupture of the front of mining in connection with the need for additional Central and flanking mine workings, as well as the drilling of two wells in each mine production.

There is also known a method of integrated management of gassing in the preparation and excavation vysokogazonosnyh coal seams (application for a patent RU №2005107882 AND, publ. 10.09.2006,, IPC E21F 7/00)adopted for the prototype, including fresh air into the mine through mine depression, the outgoing exhaust air stream on the main workings and bore a large diameter is in the process of the workings and coal mining.

The disadvantage of this method is that the well of large diameter are duplicate workings, and this increases the volume of the workings of the mine, for the timely preparation of the extraction column need to increase the speed of the workings, outgoing stream from the wells is given in ventilation workings of the mine.

The objective of the invention is independent ventilation coupled preparatory workings, longwalls and reduce the amount of underground workings total cross section.

The task is achieved in that in the method, including fresh air into the mine through mine depression and the outgoing exhaust air stream on the main workings and well, according to the invention between the projected preparatory workings from the surface of the Buryat deviated horizontal wells with long horizontal part of the trunk over the entire length of preparatory workings, and the horizontal portion of the wellbore feature in the security pillar between the paired preparation working, then start carrying out excavations with the issuance of the outgoing air stream to the next preparatory faces the linkage, podsecalo the wellbore, and further along the borehole to the surface. The provision of the necessary air flow for prometrium which I paired opening faces is implemented by installing a wellhead additional source of thrust - vacuum pump, capable of overcoming the aerodynamic drag of the well.

Method of ventilation preparatory workings by vertical-horizontal wells drilled from the surface, illustrated by drawings in which figure 1 shows the layout of workings and boreholes in coal seams during mining; figure 2 shows a section a-a in the wellbore in the security pillar.

Fresh air is supplied through mine depression crosscut 1 and 2 in angled ventilation generation 3 and further to the faces of the ongoing excavations 4 fans, local ventilation 5 ventilation pipes. Outgoing stream of air from the tunnel face is returned to the nearest breakthrough 6 and then through the bore 7 through the vacuum pump 8, which is located at the wellhead on the surface. When stricken Bonami part of the bore 9 remaining in the security pillar, then not used. Generation 10 stored for future use, well ventilated with fresh air stream with the issuance of its surface on the remaining part of the bore 11. Ventilated next complex-mechanized slaughter 12 generates outgoing stream of air in an inclined production and later in overslag 13. The remaining part of the bore 11 can be used in the form of degassing of methane-air mixture outlet 4 of the goaf.

On the section a-a shows the location of the horizontal portion of the wellbore 15, section sbec 16, the roof 17 and the soil layer 18 in a coal seam 19.

Advantages of the proposed method is independent ventilation coupled preparatory workings and long stope, the reduction of the volume of underground workings total cross section by reducing one of the inclined vent production, necessary for removal of the outgoing jet of air from the preparatory faces flanking mine production at the expense of reusability well as degassing to extract methane-air mixture from out space, independent of the spatial-temporal jurisdiction of the preparatory and mining, loss reduction in security pillars, airing one maintain a working process of coal extraction from complex-mechanized slaughter.

Method of ventilation preparatory workings by vertical-horizontal wells drilled from the surface, including fresh air into the mine through mine depression, the outgoing exhaust air stream on the main workings and the wellbore, wherein the wellbore directional horizontal wells drilled from the surface, is located in the security pillar between PR is led by the paired preparatory workings, the outgoing exhaust air stream of the preparatory faces via closest to the faces of the linkage, podsecalo the wellbore, through the vacuum pump installed on the surface at the wellhead.



 

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FIELD: mining.

SUBSTANCE: invention refers to mining and can be implemented at development of mineral deposits with stowing mined space. Composition of stowage mixture containing milled granulated blast furnace slag, inert filler and water consists of the said acidic slag of fractions smaller, than 0.071 mm not less 90 wt %, as inert filler - wastes of concentration of wet magnet separation of ferrous quartzite containing fractions smaller, than 0.071 mm not less 90 wt %, additionally - super fluidising agent SP-1 at the following ratio of components, wt % said slag 22, said wastes 54.5, super fluidising agent SP-1 0.4 of slag contents, water - the rest.

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1 ex, 2 tbl

Stowage mixture // 2396434

FIELD: mining.

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4 cl, 3 ex, 2 tbl

FIELD: mining.

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FIELD: mining.

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5 dwg

FIELD: mining.

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FIELD: mining.

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FIELD: mining.

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2 dwg

FIELD: mining.

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1 dwg

FIELD: mining.

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2 cl, 1 dwg

FIELD: mining.

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1 dwg

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1 dwg

FIELD: mining industry.

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7 cl, 11 dwg

FIELD: mining industry.

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1 dwg

FIELD: mining industry.

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2 dwg

Vibrating feeder // 2247068

FIELD: mining industry.

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1 dwg

FIELD: mining industry.

SUBSTANCE: method includes preparation and well extraction of resources of chambers with partial backfill of extraction space. Blocks of upper level relatively to blocks of lower level are placed in staggered order, while blocks are made in form of a stretched upwards hexahedron. Resources of block within one hexahedron are separated on two chambers, one of which, placed along periphery of hexahedron, after extraction and removal of ore from it is filled by hardening backfill. Second order chamber is made of hexahedron-like shape, extracted and removed under protection from artificial block on all six sides of this chamber. Removal of ore from first order chambers is performed through one removal mine - end of level ort and cross-cut in lower portion of block and intermediate sub-level cross-cuts.

EFFECT: higher efficiency.

2 dwg

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