RU2251653C2 - Block of industrial explosives - Google Patents

Abstract

FIELD: blasting operations of dry and watered boreholes at fulfilling prospecting seismology.

SUBSTANCE: Block has a body and a cover. It is fulfilled in the shape of a cylindrical polyethylene casing with flat bottom, inlet of which is covered with a lid. At the inlet of the cylindrical polyethylene sidewall a cylindrical sidewall is fulfilled. On the bottom and butt-end of the body an external and an inner trapezoid two-run carvings are fulfilled correspondingly to each other for forming monocharges out of several blocks. In the zone of inner carving Of the body two holes are made, further rigidity edges are fulfilled, in the bottom- conical plug with a hole.

EFFECT: more reliable and simple technology of making, vertical unbreaking of the monocharge is secured.

2 dwg

Description

The block for industrial explosives relates to the field of blasting in seismic exploration: for the search, exploration, and additional exploration of oil and gas fields.

At the mines of our country, cartridges of the VI safety class P12TSB-2/2 are used [1]. A single charge of known cartridges is formed from the required number of cartridges, one of which is inserted electric detonator. Each cartridge is connected with the subsequent on the principle of a bayonet lock (by insertion and rotation).

A significant drawback of the known cartridges is the imperfection of the design of the docking unit - a slight bending moment of the docking unit of a horizontally arranged single charge leads to their separation during the charging of the upper holes and ultimately to incomplete detonation of the drill holes.

Also known are safety cartridges P12TSB-0, P12TSB-1 and P12TSB-2 [2]. All of them are presented in the form of a polyethylene ampoule filled with 12CB carbon dioxide. The mass of explosives in the cartridge P12TSB-2-300, 350, 400 g, diameter 38-39 mm. They differ from each other in the configuration of the bottom. In B12CB-0 cartridges, the shell in the bottom has a cumulative notch, in P12CB-1 cartridges the end of the bottom is flat, in P12CB-2 cartridges the end is convex, equipped with a docking unit [3]. The cartridge P12TSB-1 and P12TSB-2 in the upper part are equipped with a polyethylene cover.

A single charge of ammunition P12TSB-2 is formed from the required number of cartridges. Each cartridge is connected with the subsequent one by piercing the hole with a tack in the lid and inserting the docking unit of the previous cartridge into it or placing protrusions filled in the bottom of the ampoule into a “lock” located in the cover of the previous cartridge.

The disadvantages of the known cartridges P12CB-2 are: with an increase in the number of cartridges in the charge during the formation of a single charge, the distance of transmission of detonation between the cartridges decreases. When using such explosives in mines, the formation between the ends of the cartridges of inert shipments with a thickness of only 1-2 cm can cause incomplete detonation of boreholes; although the P12TsB-2 cartridge in the bottom has a docking unit that excludes the expansion of the cartridges during short-blasting, the existing bulge in its bottom significantly reduces the speed of the explosion products in the direction of the passive cartridge.

The disadvantage of the docking unit is: weak connection of cartridges with each other, which negatively affects the practical conditions of charging the bottom hole of the upper holes. Their disassociation takes place in bore holes: piercing the passive cartridge lid with a tattoos while blasting in flooded conditions creates the preconditions for waterlogging of explosives. The consequence of this - failures, burnout.

The closest technical solution to the invention, taken as a prototype, is a cartridge for industrial explosives patent No. 2080545 [4]. The known cartridge is made in the form of a polyethylene cylindrical shell with a blank bottom, is equipped with a lid and ring corrugations for joining with other cartridges for the formation of a single charge of several cartridges, this part of the shell is equipped with ring corrugations placed on a cylindrical surface, made with the corresponding ring corrugations at the inlet of the shell and a cylindrical groove on the shell wall thickness, and the entrance of the last to the first corrugation is equipped with an annular shell, the inner diameter and length of which are equal to GOVERNMENTAL outer diameter and length of the bore.

The length of the shell is taken from the ratio

l: b: d = l: l: 0.5,

where l is the length of the shell to the first corrugation,

b is the distance from the first corrugation to the lid of the cartridge,

d is the diameter of the cartridge.

The mass of explosives in a block of 250, 500, 1000 g with a socket for an electric detonator. The diameter of the block is 37-67 mm.

The block is used for dry and flooded wells at a temperature of -50 ° C to + 50 ° C. It works flawlessly from any electric detonator after holding for 24 hours in non-flowing water at a hydrostatic pressure of 0.2 MPa, is little sensitive to shock, friction, and is quite safe to handle and transport.

Figure 1 shows a General view of the block for industrial blasting, figure 2 node docking blocks.

The block consists of a polyethylene housing and a polyethylene cover. The housing contains a cylindrical shell 3, an internal trapezoidal double-thread 4, 2 holes 5 for mounting an electric detonator, a cylindrical 6 and a conical 7 shell to ensure straightness of the mono-charge, an annular recess 8 for fixing the cover, a socket for the cover 9, an external trapezoidal double-thread 10, a tapered protrusion 11 with a hole 12, intended for fastening the loop when lowering the mono-charge, stiffeners 13, providing the strength of the unit during transportation, storage and ease of operation.

The docking of several blocks with the formation of a single charge is as follows: unscrew the blocks, turning them towards each other until they stop. The strength and reliability of the unit docking unit will be provided due to the trapezoidal double-thread.

The advantages of the proposed unit for industrial blasting are as follows:

1. The vertical inseparability of a single charge of blocks with the application of force N (40 kg).

2. Inseparability of the docking unit during the rotation of the mono-charge.

3. The use of a protrusion with a hole for attaching a loop when lowering the mono-charge into the well.

4. The rigidity of the hull during transportation, storage, ease of use, the possibility of immersion to the optimum depth.

5. Fastening the wires of the electric detonator using holes.

The end face of the cartridge is chamfered.

A significant drawback of the known cartridge (patent No. 2080545), as well as cartridge P12CB-2, is a weak docking station.

The purpose of the invention is the carrying out of seismic surveys using hollow augers, improving the quality of field materials while significantly reducing the weight of individual explosive charges due to the possibility of immersing them at the optimum depth, increasing the productivity of drilling operations.

The invention can be used in blasting for dry and flooded wells at a temperature of -50 ° C to + 50 ° C.

This goal is achieved by increasing the reliability of the design of the docking unit during the formation of a single charge of the blocks.

This block contains a housing made in the form of a cylindrical polyethylene shell with a blind bottom, and a cover for fixing the explosive. The input of the shell is equipped with an internal trapezoidal double-thread, two holes for attaching the electric detonator, cylindrical and conical shells that ensure straight charge mono-charge, an annular recess for fixing the cover, a socket for the cover. The bottom part is provided with an external trapezoidal double-thread, a conical protrusion with an opening; the middle part - stiffeners. The case is made in color: orange or red.

List of references

1. TU 84-1072-85.

2. Collection of scientific papers. Reducing injuries during blasting in coal mines. State Makeevka Research Institute for Safety in Mining, Makeevka-Donbas, 1985, pp. 7-9.

3. A.S. USSR No. 1119398.

4. RF patent No. 2080545 MKI F 42 B 3/02, F 42 D 1/02.

Claims (1)

A block for industrial explosives (BB) containing a body and a cover is made in the form of a cylindrical polyethylene shell with a blind bottom, the entrance of which is closed by a cover, a cylindrical shell is made at the inlet of a cylindrical polyethylene shell, characterized in that on the body in the bottom and end parts respectively, to each other, the external and internal trapezoidal double-threading for the formation of mono charges of several blocks, two holes are made on the body in the area of the internal thread, then a sconce of rigidity, in the bottom part there is a conical protrusion with a hole.

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