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Method for open underground development of main inclined mine openings (shafts). RU patent 2520225.

Method for open underground development of main inclined mine openings (shafts). RU patent 2520225.
IPC classes for russian patent Method for open underground development of main inclined mine openings (shafts). RU patent 2520225. (RU 2520225):

E21C41/00 - Methods of mining or quarrying; Open-pit mining; Layouts therefor
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FIELD: mining.

SUBSTANCE: method involves preliminary preparation of front of preparatory works by furnishing an industrial site, according to a technological scheme of shaft development by means of an underground method, starting from the shaft mouth and the shaft part on depositions by excavation and loading of soil in a working face by means of manual tools, output of soil and delivery of support elements in a disassembled form by end hauling along the shaft with installation of a safety barrier, assembly and installation of metal supports in the working face according to an attachment step with force in the form of a hexagon by electric welding, ventilation by a local ventilation fan and pumping-out of ground water from the working face by means of pumps. First, according to the specified direction towards the industrial site structure there developed from the ground level along depositions is an open trench by means of excavation equipment throughout the length, according to a mining and technical and economic design and a shaft performance certificate, then at the trench bottom in depositions there mounted from the ground level is a mouth and a mine opening - a shaft by hoisting equipment and as erection of mine opening - shaft support advances, the trench is backfilled in depositions with excavated soil so that clearance space is left on the downhole side. With that, shafts are ventilated by natural draft, and water is pumped out by excavation equipment - an excavator bucket together with soil excavation.

EFFECT: simultaneous performance of a mouth and some part of shaft development along depositions by furnishing the industrial site and increase of shaft development rate along depositions and excluding intensive manual labour.

4 cl, 6 dwg

 

The invention relates to mining, in particular to conduct revealing inclined mines (shafts, slope, brumbelow from the surface) for working off of coal layers.

There is a method of construction inclined mining capital from the surface up to 25 degrees when fitted with cutting, loading machines with drilling installations, formworks and pneumatic paver.

On the surface are constructed:

- technological complex unloading skip;

overpass for unloading;

- ventilator-heater installation;

- compressor;

- transformer substation;

- temporary administrative building plant (1).

The disadvantage of this method is that because of the angle of inclination up to 25 degrees impossible to combine the conduct of the mouth of the barrel on the sediment of the trunk with the equipment surface area (industrial area).

The closest analogue, taken as a prototype, is a method of the inclined trunks with use of the conveyor transport up to 18 degrees.

Surface complex is shown in RIS ibid (2)where build support the building of the overpass, gallery haulage ways, gantry crane, rock hopper, the safety barrier and then start mining on carrying out of the mouth of the barrel to the sediment from dredging hand tools; installing arch metallography manually with a return code or ring, according step mounting with reinforced concrete (W/b) tightening and strengthening specprofile in a hexagon welding with the withdrawal of people from the dead-end mines (smoke), seizure of loading of the soil in the mine hand tools in the trolley, as the deposits of clay flooded, the issuance of soil and delivery of items directly on the development of cable transport, stationary safety barrier at the mouth of the barrel and mobile before slaughter, carried out by the local airing stub generation fans and pumping water from the bottom pumps.

When it involves the following stages of the driving cycle.

At first work is carried out at the shaft until the support is at a height of not hidden under a load and will not install the safety barrier for the terminal haulage, interlocked with the parties on the zero level of the building site, the mouth are open way, initially pushing and pulling spades soil, and when formed the pit bottom breast understands hand tools, mining pick and a shovel, with loading trolley bottom or side unloading installed on downhole the barrier. After dredging one step mounting frame is set lining with hauling concrete tightening. To less collapsed to the ground from the roof framing, pierce pierced with installation of temporary piles. After loading trolley, it is then sent to the trestle zero, where it samoraspustitsya and then it loaded frame lining in the disassembled kind, the lower hoist winch at the end hauling the shaft, where unload and filled with soil from the bottom. The Assembly supports manually are in the mine and established posts of electric welding add posts of the gain in the form of a hexagon or part of it, which depends on the type of lining: arched, vaulted with a return code, the ring, as padding: tubing, reinforced concrete tightening, reinforced concrete.

During welding the people are at a fresh stream of air supplied from local ventilation fans with increasing as prodigene slaughter ventilation pipes or go to the zero point.

Ground water accumulating pumped electric or pneumatic pump from a temporary capacity, on the grounds or in the side of the trunk, in the so-called header or directly from the face.

The disadvantage of the prototype is the consistent conduct of works on equipping of the industrial site at zero with the means of carrying out prior to the beginning of the work on trunks in sediment, with ineffective use of funds of equipment for manual labor in the area of load.

The aim of the invention is to reduce the terms of commissioning revealing inclined mines (shafts) due to combination of holding the mouth and parts production - the barrel to the sediment with the equipment of the industrial site and increasing the speed of conducting trunks on deposits with the exception of labour-intensive manual labor.

This goal is achieved by the fact that pre in a given direction-construction of an industrial site with zero melt on sediment open trench excavation technique for length according hornomecholupska calculation and passport holding trunks, then at the bottom of the trench in the load is mounted with zero mouth and mining production - trunks lifting means and as the construction of mining - barrel back trench fall asleep excavated spoil the abandonment of clearance with the face side, with air trunks natural draught, the water is pumped out by excavation equipment (bucket excavator) together with the excavation.

The Assembly frame support, in the form of arch with a return code, the ring, and others, with a strengthening in the form of a hexagon with electric welding perform at grade level by template section according to the passport of carrying out of the trunks and install assembled with step of installation according to the passport.

The bottom of the trench in section coprophiliac hand tools, according to the profile callback code frame supports, placed along the perimeter of the arch elements of fastening in concrete torque (tubing), then prepared the code sets the frame posts and fix, according to the passport of carrying out of the trunks, end up sinking in the open way a construction zone gain and retain lining in the stalemate of trench-slaughter.

Of the existing mining operations on the layer, trunks underground method are counter-of-mine coal in the seam, thus carry a complete overlapping works on equipment of the industrial site, the driving of open and underground ways revealing mining - trunks.

The way of revealing inclined mines (shafts) is illustrated by the example of two shafts of the existing mine:

Figure 1 - conveyor inclined shaft and transport inclined shaft - type in the plan;

Figure 2 - section of the pipeline axis of the barrel;

Figure 3 - section transport axis of the barrel;

Figure 4 - schematic design pressure in the bulk soil.

Figure 5 - section transport barrel by 2 AA;

6 - section b-B barrel barrier figure 5.

For efficient mining coal seam in the mine field urgently need to trunks of mine on the reservoir to its outlet combine way from the surface of the counter on the sediment load to the output layer.

The project envisages to complete two trunk conveyor 1 and 2 transport the necessary section in the sinking of metallography 3 with gain in the form of a hexagon 4. Taking into account the topography and slope angle of trunks on deposits according to the given direction and slope are part of conveyor trunk 5 and part of the transport 6 open way by taking the trench excavation equipment.

On the site of the tick marks of trunks of open field, there is no electricity.

According to the proposed method work on carrying out of the trunks, without waiting equipped site for holding trunks under the traditional scheme, started according to mine data from the surface (zero) from the top of the trench method, opening the project barrels to the ground (trench) (6) by excavation equipment (excavator type EA and bulldozers) as deepening with the transition to the excavator type "Dragline" (not shown), deep trench to design diagram (figure 4).

Razborova tranches also produce according to the calculation chart (figure 4), the ring supports specprofile gather at zero, enhance and improve the hexagon of specprofile clamps and from welding-mobile welding units SAK. On the resulting bottom 8 trench placed concrete tightening 9 (tubing). Then hoisting vehicles (crane) metallography lowered into the trench assembled and installed, following mounting distance according to the passport. Shape ground return code 10, as deepening of the shafts with ring metallography or reverse arch, and the lower structure (track). At proper distance mount the safety barrier 11, then the upper arch close tightening and arrange the embankment and backfill the trench behind the place of installation of support in the angle of repose of soil from the backfill.

After these trunks on sediment in the bottom left clearance 12 (figure 5) with the surface for air circulation due to natural draft and concrete belt gain and retain 13 in the stalemate of trench-slaughter. Accumulated water in the pit at the bottom of the trench take out together with the excavation (mountain mass) the excavator bucket.

In parallel with the trunks of the trench method for load equip the site, according to the draft manual trunks and bottom when operating the mine on the layer combine way to finish the conduct of trunks by breakthrough with barrels, passed by sediment from the power supply to the industrial site of the shafts, as from the mine and power transmission lines at the substations of industrial site.

In this way within design diagram (figure 4) and the technical characteristics of earth-moving and lifting equipment were completed, part of conveyor trunk 80 m, transport 73 m with the pace of implementation, three times higher than the norm. When conducting the shafts to the opening of a mine field in the absence of underground work from the bottom, sinking, after the equipment of the industrial site and the end of the excavation trench method to load, are according to technological schemes for the project (or combine blasting methods).

Sources of information

1. Construction and reconstruction of coal mines. The subsoil. M. 1983. Str, RIS.

2. Construction and reconstruction of coal mines. The subsoil. M. 1983. Page. 220, RIS.

3. "Instruction on the choice of a frame with a metal preparation lining of mine workings. 1986

1. The method of open-pit and underground drilling opening of mines (shafts), includes preliminary preparation of the front of the preparatory work by the equipment of the industrial site, according to the technological scheme shaft sinking underground method, starting from the mouth of the barrel and end of the barrel on deposits by extraction with loading soil in the mine hand tools, issuance of soil and shipping items lining disassembled end hauling the trunk with the installation of the safety barrier, Assembly and installation of metallography in the slaughter according step mounting with gain in the form of socket welding, ventilation fan of local ventilation, pumping of groundwater from the bottom pumps, wherein the pre in a given direction-construction of an industrial site with zero melt on sediment open trench excavation technique in length, according hornomecholupska calculation and passport holding trunks, then at the bottom of the trench in the sediment mount with zero mouth and mining production - trunk load-lifting means and as the erection of fastening of mountain developments - barrel back trench in the sediment fall asleep excavated spoil with leaving clearance from the face side, with air trunks natural draught, the water is pumped out by excavation equipment - bucket excavator with excavation.

2. The method according to claim 1, wherein the Assembly frame lining, arched-back arch, the ring, and others, with a strengthening in the form of a hexagon with electric welding, perform at grade level by template section according to the passport of carrying out of the trunks and install assembled with step of installation according to the passport.

3. The method according to claim 1 or 2, wherein the bottom of the trench in the sediment in section coprophiliac hand tools, according to the profile callback code frame supports, placed along the perimeter of the arch elements of fastening in concrete torque (tubing), then prepared the code sets the frame posts and fix, according to the passport of carrying out of the trunks, end up sinking in the open way a construction zone gain and retain lining in the stalemate of trench-slaughter.

4. The method according to claim 1, characterized in that of the existing mining operations on the layer trunks underground method are counter-of-mine coal in the seam, thus carry a complete overlapping works on equipment of the industrial site, the driving of open and underground ways revealing mining - trunks.

 

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