Method for hydraulic filling of chambers

FIELD: mining.

SUBSTANCE: method includes supplying pulp under excessive pressure via a safety device. The safety device is arranged as a tee, one end of which is connected to a bottomhole pulp line, the second one - to a sealer, and a safety membrane is installed on the third one. At the same time the output of wells in the backfilled chamber is arranged near its roof.

EFFECT: higher extent of chambers filling with a backfilling material with reduction of labour costs.

2 cl, 7 dwg

 

The invention relates to the mining industry and can be used in underground development of potash deposits with the mined-out space.

The known method hydraulic bookmarks cameras, consisting of drilling wells in the pillar on the roof of the transportation of backfill mixture slurry pipeline and feed it into the chamber through the bore alternately at several points. Wells are drilled along the pillar to the first end of the camera's point of feed of the mixture, alternate feed mixture is performed by successive opening of the wells at the point of submission, with each subsequent injection point is well open after the construction of the array to the maximum height in the previous feed point (A.S. 1788299, MKI521F 15/00; Way hydraulic bookmarks cameras. -C-ka No. 4850695/03; Appl. 17.07.90; publ. 15.01.93, Bul).

The disadvantage of this method is that after laying, roofing cameras remains neoslojnennoe space and, consequently, decreases the stability of the excavation.

Closest to the proposed invention is a method of laying-out space in the chamber system development sloping potash layers, in which the flow of the pulp in laying the camera produced through wells drilled in mezhdunarodnom the rear and is equipped with a sealer (Borzakovskiy B.A. For ladonia work on Verkhnekamsk potash mines: a Handbook / Basoski, Lampulo. - M.: Nedra. - 1994. - P.95-97, RIS).

The disadvantages of this method are that the camera even at the point of feeding the pulp remains a gap between the roof and the surface of the backfill array. This gap is at best equal to the diameter of the hole.

The technical result of the proposed invention consists in the possibility of improving the extraction of ore by increasing the degree of filling of the chamber backfill material and less labor intensive to achieve a high degree of filling of the chamber.

This technical result is achieved in that in the method of hydraulic bookmarks cameras, including the supply of pulp to put the camera through the hole, backfill material fed into the chamber under pressure through the pressure relief device.

The yield of wells in laying the camera have its roof, and the safety device takes the form of a tee, one end of which is connected to a downhole slurry pipeline, the second to the sealer, and the third set of the safety membrane.

The invention is illustrated by drawings, which depict: figure 1 - General scheme bookmarks cameras with the hole in the pillar; figure 2 is a section along B-B; figure 3 is a section along a-A; figure 4 - scheme bookmarks cameras with a hole in the seam parting; figure 5 - diagram of the safety device PR is laying the cameras through mitoplasts pillar; 6 is a diagram of the safety device during the laying of the camera through a hole in the seam parting; Fig.7 diagram of the safety device.

On the drawings: 1 - connecting the camera; 2 - rear; 3 - well; 4 - put the camera; 5 - output wells; 6 - jumper; 7 - downhole slurry pipeline; 8 - pressure-relief device (tee); 9 - sealer; 10 - overload diaphragm; 11 - gauge; 12 - laid Luggage; 13 - surface profile of filling mass by feeding the pulp without excessive pressure; 14 - profile of the surface of the backfill array by feeding the pulp to pressure.

The way bookmarks as follows.

This method is useful for bookmarks cameras, the angle of inclination of the roof does not exceed 1 deg (preferably 0.5 deg).

On mountain conditions there are two options bookmark cameras: the well through Mezhdunarodny pillar (Fig 1, 3) or hole is drilled into the seam parting (figure 4).

When you tab through Mezhdunarodny pillar (Fig 1, 3) at the beginning of the connecting chamber 1 through the pillar 2 drilling 3 wells in laying the camera 4. Drilling exercise 3 so that their exit 5 was located at the roof put the camera (figure 3). At both ends of the camera set jumper 6 (figure 2).

By connecting the camera 1 are laid downhole slurry pipeline 7 (figure 1). At the end of the pulp is the wires are mounted safety device, which is kind of tee 8, one end of which is connected to a downhole slurry pipeline 7, the second to the sealer 9 installed in the well 3, and the third set of the safety membrane 10 (Figure 5, 6). To control the tank to the pipeline 1 is installed a pressure gauge 11. After that make the flow of the pulp.

The slurry in the well served in the tilt direction of the camera, starting from the top. Figure 1 shows the flow of the pulp in the middle hole. At the time of filing of the pulp fix the gauge 11. At the beginning of the filling of the chamber under the roof the pressure on the pressure gauge increases and remains constant until the filling chamber to the wells. After that, the pressure increases. With increasing pressure to the calculated value of the flow of the pulp stop and start the flushing of the pipeline.

If for some reason the pressure increase exceeds the nominal, then there is a rupture of the safety membrane 10 (7, dotted line), the slurry flows into the chamber 1, and then produce flushing of the pipeline or switch the flow of the pulp in another cell.

Bookmark the camera through a hole in the seam parting (figure 4) differs from that described above only install safety devices (tee). The device is mounted above the well, as shown in Fig.6.

The flow of pulp in the chamber is od pressure increases the degree of filling of the chamber filling material, due to the fact that under the pressure of the filling material fills the chamber under the roof at a distance of l(figure 2). The value of ldepends on the pressure, angle and direction of inclination of the camera.

The magnitude of the pressure at which the feed slurry into the well, determined mainly by experiment, as it depends on the camera angle, the difference of marks well, its diameter, the density of the pulp.

On the incision (figure 2) shows the increase in the area of the longitudinal section of filling the array during the laying of the chamber under positive pressure (continuous line) compared with the conventional method of bookmarks (dotted line). The increase dsalageanu square is between these lines.

Increasing the degree of filling of the chambers improves the extraction of ore from the bowels, and also to reduce the cost of drilling and installation work associated with connecting the pipeline to the well.

The proposed method is tested in industrial conditions. On mine Solikamsk potassium mine No. 2 feed slurry under pressure produced through a hole in the seam parting. The pressure at the wellhead 0.6 MPa. The spreading of slurry under the roof was 40 m from the well, which increased the degree of filling by 15%. On mine Solikamsk potassium mine No. 3 feed slurry under pressure produced is led through a hole in mezhdunarodnom the pillar, the pressure at the wellhead was 1.0 MPa of them lifting the slurry in the borehole 0.3 MPa. The spreading of slurry under the roof 30 m from the well. Increasing the degree of filling of 5÷10%.

Using the proposed method allows to increase the degree of filling of chambers backfill material while reducing labor costs and, accordingly, to increase the extraction of ore.

1. Way hydraulic bookmarks cameras, including the supply of pulp to put the camera through bore, wherein the filling material is fed into the chamber under pressure through the pressure relief device having the form of tee, one end of which is connected to a downhole slurry pipeline, the second to the sealer, and the third set of the safety membrane.

2. The method according to claim 1, characterized in that the yield of wells in laying the camera have its roof.



 

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FIELD: mining.

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SUBSTANCE: shaft pneumatic bridging comprises pneumatic shell, suspension unit, protective jacket, manometric and air-supply hoses, device for filling, control of excessive air pressure and its ejection, mount cord. At the same time pneumatic shell is arranged in the form of soft axisymmetric toroidal shell of rectangular section, inside of which there is sleeve arranged, and along its axis there is pipe mounted in with diametre that is less compared to sleeve. Besides pneumatic shell is separated into two equal parts by means of perforated web, upper end and its side surfaces are coated by loose-fitting meshy web with lap towards working zone of rise heading, upper end is made of synthetic high-module fibre of high strength.

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