RU176467U1 - COMBINED BORE CHARGE - Google Patents

Abstract

The utility model relates to the field of drilling and blasting, specifically to the design of a combined borehole charge and can be used for explosive destruction of rocks of high strength by the method of borehole charges for the qualitative study of the bottom of the ledge and to obtain the specified parameters of the particle size distribution of the rock mass. The combined borehole charge consists of the upper column of the explosive substances, for example, I-50 granemite, a profile inert gap and a lower column of high-energy explosive substances, for example granulotol.

Description

The utility model relates to the field of drilling and blasting, specifically to the design of a combined borehole charge and can be used for explosive destruction of rocks of high strength by the method of borehole charges for a high-quality study of the bottom of the ledge.

Known combined explosive charge (patent RU No. 2280236, publ. July 20, 2006), consisting of blocks containing two explosives with different bulk densities and detonation speeds.

The disadvantage is the need to pack each unit in a separate shell.

A known method of manufacturing and mechanized loading of wells with an emulsion explosive mixture (patent RU No. 2208219, publ. 07/10/2003), which consists in the preliminary mixing of emulsion and granular explosives in a ratio of 1:10 to 10: 1 in a retractable transverse screw mixing and charging machine transporting granular explosives, and the supply of the finished emulsion explosive mixture with a transverse retractable screw into the well, where under the influence of gravity forces a borehole charge is formed.

The disadvantage is that the design of the charge does not provide a high-quality study of the bottom of the ledge in ore deposits of high strength when mining high ledges. In addition, when using such a charge design and pouring explosives, at least two charging machines are needed to charge one well.

A known method of blasting a combined charge (patent RU No. 2043601, publ. 09/10/1995), including drilling a well, filling it with various types of explosive, clogging with an inert material, and initiating.

The obvious disadvantages are the relatively low energy of the explosion of the combined charge, the need to use powerful initiators of detonation, or the increased consumption of initiators, since a significant part of the charge is low-energy ammonium nitrate with a low detonation velocity.

Known downhole explosive charge (patent RU No. 75028, publ. 07/20/2008), adopted for the prototype, consisting of a bottom gain charge placed in the borehole well, the main charge placed in the middle of the well, wellhead charge placed in the upper parts of the well, and stemming.

The disadvantages of this design are due to a limitation in use due to the danger of mechanized loading.

The technical result of the invention is the simplicity of charge design, high-quality exploration of the soles of a high ledge in ore deposits of high strength, and high energy explosion of the charge.

The technical result is achieved by the fact that the inert gap is made profile, and the upper section is formed from an explosive substance - granemite I-50.

The design of the combined borehole charge is illustrated by the following figure:

FIG. 1 is a general diagram of a device,

where 1 - stemming (stemming material);

2 - the upper column of the explosive - granemite I-50;

3 - inert profiled gap (ZGDU);

4 - the lower section of the high-energy explosive - granulotol;

5 - action movie of the upper explosive column;

6 - action of the lower column of explosives.

The formation of the borehole charge is as follows. In the bottom part of the well drilled in the first row (Fig. 1), the lower column of high-energy explosive substance 4, granulotol, is formed inside which the fighter of the lower explosive column 6, which can be, for example, a TG-500 piece, is placed. Then, an inert profiled gap (ZGDU) 3 on top of the lower column of high-energy explosive - granulotol 4. After the inert profiled gap (ZGDU) 3 is installed, the upper column of the explosive is formed on top of it substances - granemite I-50 2 and placed therein action movie of the upper column of explosive 5. The remaining free part of the charging cavity is filled with blocking material 1.

Combined borehole explosive charge works as follows. Using the fighter of the lower explosive column 6, the lower section of the high-energy explosive, granulotol 4, is initiated. The shock wave passing through the lower charge column, penetrating the conical inlet space of the inert profiled gap (ZGDU) 3, produces shock loading of the inner surface of the inert gap, as a result bringing the device expands and locks the detonation products in space

charge cavity. At the same time, the internal conical surface of the profiled gap focuses and reflects the shock wave to the bottom of the well. In the explosion of the upper column of the explosive - granemite I-50 2, the lower part continues the destruction at the quasistatic stage. As a result, the maximum possible loading takes place along the line of least resistance along the sole, which ensures high-quality study of the sole of the ledge.

Claims (1)

A combined borehole charge consisting of a bottom-up charge placed in a borehole borehole, a main charge placed in the middle part, a wellhead charge placed in the upper part of the well, and a bottom hole, characterized in that the inert gap is shaped and the upper section is formed of explosive substances - granemite I-50.

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