Liquidation method for water break through vertical borehole

FIELD: mining industry, particularly elimination of emergency situations.

SUBSTANCE: method involves closing borehole cross-section with extendable means; arranging predetermined volume of non-combustible material above the means, wherein the volume is determined from a given relation; discharging all non-combustible material in the borehole at a time and further distributing portions of non-combustible material having volumes of not less than volume of incoming water. Non-combustible material includes clay and pourable components which are laid in layers above the means, wherein clay volume is equal to pore volume of pourable component.

EFFECT: increased reliability of borehole sealing and water burst liquidation.

3 dwg, 1 ex

 

The invention relates to mining and is designed for emergency situations when a sudden flood from the suppressed flooded workings upper horizons through a vertical shaft in the actual production of the lower horizon.

Known method of eliminating vertical shaft, including the overlapping section of the trunk regiment and the filling of the barrel with non-combustible materials (Rules of safety in coal and shale mines. M.: Nedra, 1974, p.48).

The disadvantages of this method are the following. The entrance of large volumes of water in the barrel at her sudden breakthrough eliminates the possibility of erecting a regiment to cover the cross section of the trunk. In dumping of non-combustible material without building regiment he fills the sump and is located above the sump in the form of a cone angle of repose. On the surface of the cone material is in limiting equilibrium, and reaching the surface during the further filling of the barrel material is easily carried away by water flow, with large kinetic energy. As a result of this whole usuaaly material not retained on the pair, and brought water to produce lower horizon that does not allow you to overlap the section of the barrel and eliminate the sudden breakthrough of water into the current generation.

The objective of the invention is to provide opportunities nade the aqueous overlapping section of the barrel, where and liquidated sudden breakthrough of water in the workings of the current horizon.

This object is achieved in that the overlapping section of the barrel to produce the drop-down regiment, noncombustible material previously warehoused above the regiment, and the filling of the barrel begin with the simultaneous discharge of non-combustible material in the volume is determined from the expression

V=S(l+h+2d)+bh2ctgϕ,

where S is the cross section of the trunk in the light; l is the depth of the sump; h - the height pairing of the stem; d - diameter of the trunk in the light; b - width of the pair of trunk; ϕ - the angle of repose of non-combustible material, and continue to rate determined on the basis of the water in the barrel and in amounts not smaller volume of water. And non-combustible materials include clay and loose parts. Clay part is equal to the pore volume of the loose part.

The invention is illustrated by drawings, where:

figure 1 shows a vertical section of the mouth of the barrel for storage of non-flammable material in the wellbore;

figure 2 - the same for storage of non-flammable material over the mouth of the barrel;

figure 3 is a vertical section of the trunk at the site of pairing it with the workings of the current horizon after simultaneous reset of all stored material.

The method is implemented as follows. With a sudden breakthrough of water into the barrel 1 (Fig 1) above it is the latter 2 are mounted drop-down shelves 3, consisting of two or more sashes that by winches (not shown) holding on the ropes 4, to one of the ropes attached to the rope 5, which open doors regiment 3. Non-combustible material 6 store above the regiment layers (not shown)with a mixture of granular and clayey materials. Shelves 3 the accumulation of material 6 is lowered by winches in the trunk as long as the volume of material will not be equal to those specified in the claims. If the trunk reinforcement (executions conductors 7 and 8 in figure 2) partially (at the site equal to half of the diameter) disassemble, frame shelf rigidly secured on the shaft and hold the sash in the closed position with the rope 5. Non-combustible material 6 store above regiment 3 in the form of a cone, alternating layers of granular and clayey materials. Around the perimeter of the cone in the process of dumping lay plastic pipe 9, in which are accommodated the charges of explosives after storage of materials in the required amount (the shaded part).

To avoid pinches the rope 5 on it put pieces of round plastic pipes (not shown), cut along the diameter.

Reset stored above the regiment 3 material 6 is made at the opening of the valves of the regiment, to which the rope 5 is released in an amount exceeding half the diameter of the trunk. The directly the public prior to discharge material 6 on the borehole wall to supply water to reduce friction (figure 1) and charge in pipe 9 explosive to clear part of the material 6 on the area ABCD (figure 2), which explode immediately after lowering the top of the cone.

Simultaneously reset (figure 3) from a great height material 6 fills the sump 10, pair 11 and section 12 of the barrel (height equal to twice the diameter) and creates a dense waterproof (thanks clay) jumper, which securely closes the trunk and stops the flow of water in the generation of the current horizon. This jumper is held by the forces of adhesion of the material with the walls of the trunk and soil pairing, where the material is located at the angle of repose and serves as a retaining wall.

Further filling of the barrel with non-combustible material is produced in a known manner, and its intensity is determined proceeding from the water in the barrel. Submission of material by volume should not be less water in the trunk.

A specific example of the method. When breakthrough of water through a vertical vent (without reinforcement) shaft diameter, in the light of 4 m and an area of 12.6 m2the water inflow is 250 m3/min, flooding the bottom of the working horizon. For the elimination of water breakthrough (figure 1) in the mouth 2 of the barrel 1 is mounted drop-down shelves 3, consisting of a frame and two valves, which by winches (not shown) is held on the ropes 4, to one of the ropes 4 jimkami attached the rope 5, through to the th open doors regiment. Non-combustible material 6 store above regiment 3 layers, alternating loose (with a porosity of 32%) and clay (in the amount of 32% of the bulk materials. Shelves 3 the accumulation of material 6 is lowered into the wellbore 1 by winches as long as the volume of bulk and clay material will not be equal to

V=S(l+h+2d)+bh2ctgϕ=12,6(4,5+4+8)+3,5×42ctg30°≈305 m3.

On the rope 5 as the lower shelf wear six-foot sections of plastic pipe, cut along generatrix which exclude pinches the rope 5 pieces of material. Prior to discharge material into the barrel at the wall to supply water to reduce adhesion by contact of the concrete lining and the material 6. Reset the stored material is produced at the opening of the valves regiment 3 upon release of the rope 5. Simultaneously dumped material 6 in the amount of 305 m3when falling from a height equal to the depth of the trunk (300 m), compacted clayey material fills all the pores of the granular material and working the horizon creates a waterproof jumper that overlaps the cross-section of the trunk at the site equal to two diameters of the barrel. Thus, liquidated breakthrough of water into the barrel. Next, the barrel is filled with non-combustible materials to the earth's surface.

Thus, in the proposed method, the elimination of a breakthrough of water through a vertical shaft becomes possible the Hanks to the one-time reset of non-combustible material with the content of clay and loam in the volume sufficient to create a dense waterproof tube in the lower part of the trunk.

The method of liquidation breakthrough of water through a vertical shaft, including the overlapping section of the trunk regiment and the filling of the barrel with non-combustible materials, characterized in that the shelves do drop-down, and non-combustible material previously warehoused over the regiment to the extent necessary for the simultaneous reset, which is determined from the expression

V=S(l+h+2d)+bh2ctgϕ,

where S is the cross section of the trunk in the light;

l is the depth of the sump;

h - the height of the pair of trunk;

d is the diameter of the trunk in the light;

b - width of the pair of trunk;

ϕ - the angle of repose of non-combustible material,

moreover, non-combustible material consists of granular and clayey parts that are warehoused in layers, and the volume of clay part is equal to the pore volume of the loose parts, additionally, the subsequent discharge of non-combustible material continue in amounts not smaller volume of water.



 

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