RU189566U1 - CHARGE FOR CONTOUR EXPLOSION - Google Patents

Abstract

The utility model relates to the mining industry, in particular, to the technique of blasting operations and can be used for special blasting operations, for example, with contour blasting. A charge with a polymeric cylindrical shell of the required length is placed on a coil with a stand, on which a removable disposable carrier bar is installed with the upper end of the cylindrical shell fixed on it and the carrying cord. The charge contains a detonating cord, and emulsion explosive is used as an explosive. 5 il.

Description

The utility model relates to the mining industry, in particular, to the technique of blasting operations and can be used for special blasting operations, for example, with contour blasting.

Known are contour wellbore charge designs (certificate no. 1508699 and no. 1417577) with a central arrangement along the axis of the well of charges of patronized explosives placed in the form of a solid or dispersed charge column of the garland type. The space between the cartridges and the walls of the well is filled with an inert mass — small fractional materials for crushing rocks or an air gap is left. The lower cartridge is in contact with the bottom of the well or is separated by an air or inert gap. The main, upper stemming above the charge column is filled with inert materials.

The disadvantage of this method is the high complexity, loss of time and increased contour destruction of the array.

Known downhole contour charge (RF patent No. 2150672, publ. 10.06.2000). The essence of the invention: the charge consists of explosive cartridges (BB), which flanking attached to a wooden liner, adjacent to the walls of the well and are oriented along the axis of the contour row of charges, while as the internal blocking between the cartridges of explosives and above the contour charge used porous organic blocking and in the bottom of the well is a damper stemming consisting of inert and porous parts.

The disadvantage of this method is the high complexity and increased contour destruction of the array.

A known method of forming hose contour charges from slurry explosives (RF patent №2097680, publ. 07.27.1997). SUMMARY OF THE INVENTION The method includes mixing a thickened aqueous oxidant solution with a solid sensitizer — granulotole and a crosslinking agent — changing the percentage of granulotole at the temperature of the solution below the melting point of granule-isolating granules; formed on the surface of the ledge, followed by placing it in the contour well.

The disadvantage of this method is the high cost of loop charges and the complexity of their descent into the well.

There is a method of loading of contour wells and a device for its implementation (as.S. USSR №1383957, publ. 04/27/2000, bull. No. 12). The method of loading contour wells includes the simultaneous formation of a column of aggregate from an inert material and, with a lag from it, an explosive charge column supplied by compressed air through pipelines with nozzles according to the invention in order to increase the effectiveness of contour charges by increasing the range of change in charge properties, a column the aggregate is formed with a different density across the cross section, and the compressed air is separated from the pipeline supply of explosives above the level of the column aggregate. A device for loading contour wells, includes pipelines for supplying explosives and aggregate with nozzles at the outlet, according to the invention, nozzles for aggregate are separated from each other by longitudinal partitions, and pipeline for supplying explosives is equipped with air separators installed sequentially behind the aggregate nozzles. The air separator can be made in the form of a housing with a side wall in the form of a truncated cone, the larger base of which is provided with a grid with a central hole for the explosive supply hose.

The disadvantage of this method is the high cost of loop charges and increased labor costs for their formation.

There is a method of forming loop charges from emulsion explosives (RF Patent No. 2061864, publ. 10.06.1996), including gas generation of the hot mixture, filling it into the shell and cooling until the oxidizer is completely crystallized, in order to reduce violations of the border array when creating a contour gap by bringing the density of the contour charge along its length in accordance with the crushability of the rocks along the height of the ledge, in the process of gas generation of the mixture, the percentage of the additive introduced into it changes the rows until complete crystallization of the oxidizing agent is carried out at a constant hydrostatic pressure before it is placed in the well. The percentage of the input gas-generating additive sodium nitrite is determined depending on the strength of the rocks from the ratio.

A known charge for contour blasting of the type ZKVK (TU 84-1068-85), consisting of individual polymer cylindrical shells (sections) filled with explosives, interconnected by means of a double-sided polymer connecting device, which holds the sections only due to the friction force arising between the internal surface of the device and the surface of the charge in contact with it.

The disadvantage of this method is the high complexity of the descent of the charge into the well, the possibility of damage to the charge during installation, as well as non-water resistance of the explosive.

Known charge circuit blasting garland type ZKVG (TU84-1143-87). The charge is a polyethylene hose (polymer cylindrical shell) with a diameter of 45, 60, 75 mm, filled with an explosive - ammonite No. 6 ЖВ, having clamps with aluminum wire clips along the length of the hose every 500 mm. (link length). In the center of the charge, the carrier cord is missed, allowing the garland to be secured at the wellhead, to build it up along the length, and also to protect the SCWG shell from excessive deformation and destruction.

The disadvantage of this method is the high complexity of the descent of the charge into the well, the possibility of damage to the charge during installation, as well as non-water resistance of the explosive.

Known charge for contour blasting adopted for the prototype (patent for the invention of the Russian Federation No. 2304755, 08.20.2007). Charge for contour blasting, including a polymeric cylindrical shell filled with an explosive, a carrier cord, paper clips and a detonating cord, made with the possibility of mounting on the means of lowering into the well.

The disadvantage of this method is the possibility of damage to the charge during installation, as well as non-water resistance of the explosive.

The technical result of the claimed invention is to minimize the possibility of damage to the charge during the installation process, as well as giving the charge additional water resistance.

The technical result is achieved by the fact that in a charge for contour blasting, including a polymer cylindrical shell filled with explosive, a carrying cord, paper clips and a detonating cord made with the possibility of mounting on the means of lowering into the well according to the invention, the lower end of the charge for contour blasting contains a plastic guide a cone, and an emulsion explosive is used as an explosive.

The charge for contour blasting, is illustrated by drawings, where in FIG. 1 is a diagram of the formation of a loop charge from an emulsion explosive in a shell; FIG. 2 shows a cross-section of the nozzle for forming a charge with longitudinal channels along A-A; FIG. 3 shows a shaped loop charge on a coil, FIG. 4 shows the stage of installation of a contour charge in the well; FIG. 5 shows a loop charge installed in a well, where:

1 - polymer cylindrical shell of the required length, for example, a polyethylene sleeve;

2 - nozzle with longitudinal channels, for example, a pipe;

3 - longitudinal channel to accommodate the detonating cord;

4 - longitudinal channel to accommodate the carrying cord;

5 - emulsion explosive.

6 - detonating cord;

7 - carrying cord;

8 - paper clips;

9 - coil for winding charge for contour blasting, mounted for rotation on the rack 10;

10 - stand coil 9;

11 - removable disposable support plate, for example, a wooden bar;

12 - adapter from mixing-charging machine to nozzle 2 with a static mixer;

13 - well;

14 - charge guide cone for contour blasting.

The charge for contour blasting is made as follows. A charge coil 9 is made for contour blasting, mounted rotatably on rack 10. The dimensions and materials of charge contour coil 9 for contour blasting are determined experimentally from the condition of charge safety for contour blasting when winding and unwinding, taking into account the placement of a removable disposable support bar 11 on it. .

The charge for contour blasting is used as follows. On the block on which the project provides for contour blasting, bore a hole 13 (or more). Then, the polymer cylindrical shell 1 is delivered to the block either folded or in a coil and cut into pieces of the required length, taking into account the design charge length for edge blasting. Then the resulting piece of polymer cylindrical shell 1 charge for contour blasting of the desired length is put on the nozzle 2 with longitudinal channels, for example, a pipe. A detonating cord 6 is inserted into the longitudinal channel 3 to accommodate the detonating cord with its placement inside the polymer cylindrical shell 1 when the inner space is filled with an emulsion explosive 5. The carrier cord 7 is inserted into the longitudinal channel 4 to accommodate the carrying cord with its placement inside the polymer cylindrical shell 1 when its inner space is filled with an emulsion explosive 5. Then the detonating cord 6 and the carrying cord 7 are fixed on a removable disposable support bar 11, nap Example, a wooden bar, which in turn is temporarily fixed on the coil 9 for winding a charge for contour blasting. Then the non-chargeable part of the charge for contour blasting is wound onto the coil 9 and the upper clip 8 is put, after which the nozzle 2 with longitudinal channels is connected to the adapter 12 from the mixing and charging machine with a static mixer and the emulsion explosive 5, for example gas-generated, is fed into the inner space of the shell 1 . As filling the outer side of the cylindrical polymer shell 1 put the clips 8, for example, using a pistol for knitting fittings, or manually. The installation step of the clips 8 is determined experimentally, experimentally-analytical or empirically. Also, as the polymeric cylindrical shell 1 is filled, it is wound onto a coil 9 for winding a charge for contour blasting, mounted rotatably on a stand 10. After the polymeric cylindrical shell 1 is full in length and fully wound on a coil 9, put the bottom clip 8 to produce charge for contour blasting, ready to be installed in the borehole 13. The charge for contour blasting is transferred to the borehole 13, if necessary, bend (Fig. 5) and, if necessary, put a guide cone 14 to lower I and the likelihood of a charge rush for contour blasting during a descent along a bore 13. The charge for contour blasting into a bore 13 is discharged by unwinding a charged polymer cylindrical shell 1 from a coil 9. After unwinding a charge for contour blasting over a bore 13, they are fixed with a removable disposable support bar 11 For example, a wooden beam. The coil 9 is used repeatedly in the above sequence.

The use of charge for contour blasting provides the following benefits:

- giving the charge additional water resistance;

- minimizing the possibility of damage to the charge during installation;

- reducing the cost of creating a loop charge;

- simplify the design of the device.

Claims (1)

Charge for contour blasting, including a polymeric cylindrical shell filled with an explosive, a carrier cord, paper clips and a detonating cord configured to be mounted on a means of lowering into the well, characterized in that the lower end of the charge for contour blasting contains a plastic guide cone, and as explosives use emulsion explosives.

Images