RU83129U1 - WATER HYDRAULICING - Google Patents

Abstract

Water-proofing of holes with an intermediate lock, including two or more water-filled ampoules, locking a wad of plastic materials at the mouth of a hole, characterized in that an intermediate locking wad is placed between the water-filled ampoules.

Description

The claimed technical solution relates to mining, in particular to the field of destruction of mountain ranges with the use of drilling and blasting. The inventive utility model can be used in both coal and ore mines.

Known for drilling holes when conducting blasting operations, (analog), consisting of a water-filled ampoule and two locking wads - one in the wellhead of the hole, and the other - additional between the explosive charges and the ampoule (Utility Model Patent of the Russian Federation No. 70572, published on 01.27.08 Bulletin No. 3).

The disadvantage of this jamming is that the additional wad placed in front of the ampoule after the explosive charge, perceiving first the impact of the shock wave, first compresses itself and then transfers pressure to the water-filled ampoule. As a result of this, the water mass after the destruction of the ampoule perceives a reduced pressure, since part of the wave energy is expended on crushing the plastic additional wad.

Also known is the borehole shutoff, adopted as a prototype, consisting of two water-filled ampoules placed directly behind explosive cartridges (BB) and a locking wad of plastic material placed in the wellhead of the borehole after water-filled ampoules (hydraulic ampoules) (P.I. Kushnerov “Safety blasting during electric blasting in coal and shale mines .: Kemerovo, Kuzbassvuz-publ. 2005. P.302 ").

A disadvantage of the known water shutter is that the water-filled ampoules have a diameter smaller than the diameter of the borehole and, as a result, between the walls of the borehole and ampoules an air radial clearance of 4 to 12 mm is formed (depending on the diameter of the borehole).

During the explosion of the explosive charge, the powerful shock wave that forms, having a high speed of movement, manages to pass through the air gap before the ampoules are destroyed and the reduced water mass can block all sections of the hole.

In this case, the possibility of premature expulsion of the locking wad from the mouth of the borehole and the maximum expansion of the compressed water mass in the borehole does not occur, which will not impede the free exit of high-temperature explosion products (MF) into the bottom hole of the mine.

In the presence of methane in a mine atmosphere, it can ignite, which sometimes happens in the practice of blasting with serious consequences.

In such a situation, the formed pressure of the mass of water in the hole and the duration of its impact on the walls of the hole will not reach the maximum value, which does not ensure the full use of explosive energy in the destruction of the rock mass.

Thus, the disadvantage of the considered hydraulic shutdown options is that they do not provide the simultaneous maximum pressure of the water mass and the duration of its action in the hole.

The technical result of the utility model is to increase the time delay for stalling in a hole, increase the completeness of the use of the energy of the explosion to destroy the rock mass, lower the temperature of the gaseous products of the explosion emitted from the hole, and increase the safety of mining operations.

The specified technical result of the claimed technical solution is achieved by the fact that an intermediate locking wad of plastic material is placed between the hydraulic ampoules.

The inventive utility model is illustrated by drawings, where figure 1 shows the inventive water shutter; figure 2 is a plot of the developed spacer pressure of the water mass and the duration of their impact on the borehole walls of the inventive water shutter; figure 3 is a plot of the developed spacer pressure of the water mass and the duration of their impact on the walls of the hole in the analogue; figure 4 plot of the developed spacer pressure of the water mass and the duration of their impact on the walls of the hole in the prototype.

The inventive water shutoff hole 1 (Figure 1) consists of two hydraulic valves 2 and 3, an additional intermediate locking wad 4 and the main locking wad 5 in the wellhead part 1. When the explosive charge 6 blows, the shock wave acts directly on the hydraulic valve 2 adjacent to the explosive charge , creating the maximum pressure of the water mass spread (P _p1 ) (Figure 2), since the intermediate locking wad 4 prevents its movement and at the same time increases the duration of the maximum water mass spread on the borehole walls (1 _p1 ).

At the moment of closure creasing additional intermediate locking wad 4 is an influence of pressure on the following gidroampulu 3, this creates a second portion of spreading the water mass on the hole wall (R _p2), duration of which (1, _p2) is predetermined delay time in the borehole 1 wellhead locking wad 5 In this case, the borehole pressure is affected by the total pressure of the water mass (P _p1 + P _p2 ) and the duration of its action (1 _p1 + 1 _p2 ) is significantly increased (Figure 2).

In the considered analogue (Patent for a utility model of the Russian Federation No. 70572, publ. 01/27/08, bull. No. 3) the magnitude of the spacer pressure P _p3 and the duration of its action 1 _p3 shown in figure 3 is significantly less than in the claimed utility model.

In the prototype - figure 4 - (P.I. Kushnerov "Safety of blasting during electric blasting in coal and shale mines: Kemerovo, Kuzbass-svuzizdat. 2005. P.302") the magnitude of the spacer pressure P _p4 and its duration 1 _p4 higher than in the analogue, but less than in the claimed technical solution.

The advantages of the proposed technical solution are that the hydraulic shutter 1, made of two or more water-filled ampoules, has one locking wad at the mouth of the borehole and the second is an intermediate shut-off wedge between the water-filled ampoules, the efficiency of such hydraulic shutdown is increased by:

- the formation of the primary plot of the spread of water mass on the walls of the hole when exposed to a shock wave directly on the first hydraulic unit;

- increase the duration of exposure to the primary maximum spread of the water mass provided by the resistance of the intermediate locking wad;

- the formation of the secondary section of the spread of water mass when exposed to a shock wave on the second hydraulic valve;

- the total increase in the duration of the impact of the water mass of the hydraulic ampoules on the borehole walls, which increases the time for stalling in the borehole, ensuring the full use of the explosion energy to destroy the rock mass and reducing the temperature of the gaseous explosion products to safe limits, which ultimately increases the efficiency and safety of conducting mining operations.

Claims (1)

Water-proofing of holes with an intermediate lock, including two or more water-filled ampoules, locking a wad of plastic materials at the mouth of a hole, characterized in that an intermediate locking wad is placed between the water-filled ampoules.