RU146134U1 - DEVICE FOR CREATING AN INTERMEDIATE IN A WELL - Google Patents

Abstract

A device for creating a gap in the well, comprising a piece of material and placed inside and in the center of the piece of material, a loose load in which one end of the rope is pulled through the center of the piece of material from the inside to the outside, and the other end is left free, and the piece of material outside is tied with another rope, around the first, forming an internal volume, the transverse diameter of which is 15-20% larger than the diameter of the well, which is one third filled with bulk material, characterized in that the center of the material segment is attached to the support minutes as a rod, and to the bottom of the cargo support is secured, the transverse dimension of which 35-50% less than the borehole diameter, the length of support commensurate with the load with the length regales.

Description

The utility model relates to mining, in particular to the field of drilling and blasting and can be used in various industries that use blasting in rock masses.

For high-quality study of the bottom of the ledge, the well is drilled with a bump. The borehole is necessary for the qualitative destruction of rocks in the bottom of the ledge and should be l _n .

l _n = (10 ÷ 15) d _c ,

where l _n is the length of the rebound, m;

d _c - well diameter, m

A borehole well leads to an increase in the volume of drilling, to a violation of the roof of the lower ledge, as a result of which it is taken to be minimal in easily exploded rocks. In hard-to-explode rocks when using multi-row short-blasting blasting sometimes l _n > 15d _. (VV Rzhevsky. Open cast mining. Part 1. Production processes. Fourth edition, revised and supplemented. M., Nedra, 1985, pp. 85-86).

The practice of drilling and blasting and theoretical studies show that the creation of gaps in the borehole charge can reduce the specific consumption of explosives without compromising the quality of the explosive preparation of the rock for excavation. The nature of the mentioned effect lies in the fact that after the explosion of a charge adjacent to the gap, expanding gases fill the gap and, when compressed, accumulate energy, the destructive effect of which on the array ensures the required quality of explosive preparation. In addition, it is known that the gaps in the borehole charges accumulate and transfer the energy of the explosion to the array in such a way that the overcrushed rock in the near charge zone is reduced and provides a more uniform crushing of the rock.

A device for dispersal wells is known, comprising a piece of material and a bulk load placed inside the piece of material, in which one end of the rope is pulled through the center of the piece of material from the inside to the outside, and the other end is left free, and the bulk load and piece of material are placed inside and in the center of the piece of material. outside, tied with another rope around the first, forming an internal volume that is one third filled with bulk cargo (RF patent 2319924 IPC F42D 1/08, publ. 20.03.2008).

Disadvantages: the device is difficult to install at the level of the sole of the ledge.

The technical result of using the proposed utility model is to reduce the specific consumption of explosives while maintaining the high quality of preparation of the blasted rock mass, simplifying the installation of the device at the level of the bottom of the ledge.

The specified technical result is achieved in that in the device for creating a gap in the well, containing a piece of material and placed inside and in the center of the piece of material, a loose load in which one end of the rope is pulled through the center of the piece of material from the inside to the outside, and the other end is left free, and a piece of material outside is tied with another rope around the first, forming an internal volume, the transverse diameter of which is 15-20% more than the diameter of the well, which is one-third filled with bulk cargo, according to the claimed utility model, the center of the material segment is attached to the support, made in the form of a rod, and a load is attached to the lower part of the support, the transverse size of which is 35-50% less than the diameter of the well, while the length of the support with the load is comparable with the length of the drill.

The inventive device consists of a support 1, made in the form of a rod, to the upper part of which a piece of material 2 is attached with a bulk cargo 3 placed in it 2/3 of its volume. The transverse diameter of the piece of material 2 with a bulk cargo 3 placed in it is 15-20 % more than the diameter of the well, which provides reliable overlap of the cross section of the well. To eliminate freezes or jamming of the inventive device in the well, a load 4 is attached to the lower part of the support 1, the size of which is 30-50% less than the diameter of the well. The load 4 centers and guides the device, the mass of the load 4 is commensurate with the mass of the device. To simplify the installation of the device at the level of the sole of the ledge, the length of the support with the load is comparable with the length of the rebound.

The device operates as follows. The inventive device is lowered into the well at the connecting element 5 (for example, on a rope) to the bottom of the well, a piece of material with a loose load placed in it reliably overlaps the cross section of the well at the level of the bottom of the ledge, since the length of the support with the load 4 is comparable with the length of the crossbar. After that, the connecting element 5 is released and it freely falls into the well, then the action movie is lowered onto the installed device and then normal loading is carried out.

At the site No. 1 of the branch of OJSC UK “Kuzbassrazrezugol, Tallinn Coal Mine”, “Yerunakovskoye Pole”, the inventive device was tested to create a gap in the bottom of the well at block No. 5 of the ESh-10/70 excavator No. 334 at horizon 227-229.8 ; drilling rig ZSBSh-200 No. 227.

Characteristics of an exploded block: rock name - siltstone, strength f = 5; sandstone, fortress f = 7, block category III, well depth up to 45 m; the volume of the blasted array is 295,000 m ³ .

To identify the health of the devices for creating a gap in the bottom of the wells in 30 wells with a diameter of 215.9 mm drilled at an angle of 90 °, the inventive device with a length of 2.5 meters was lowered to the bottom of the well. On this device the explosive charge of Granulit UP-1 was mounted up to 1250 kg, while in each well the explosive savings amounted to 112.5 kg.

After the explosion, the quality of the prepared rock mass was rated as good both in the place where the devices were not installed and where they were installed. The tests carried out allow us to confirm the effectiveness of the use of devices to create a gap in the bottom of the well.

Thus, the claimed device allows to reduce the specific consumption of explosives while maintaining a good quality of preparation of blasted rock mass.

Claims (1)

A device for creating a gap in the well, comprising a piece of material and placed inside and in the center of the piece of material, a loose load in which one end of the rope is pulled through the center of the piece of material from the inside to the outside, and the other end is left free, and the piece of material outside is tied with another rope, around the first, forming an internal volume, the transverse diameter of which is 15-20% larger than the diameter of the well, which is one third filled with bulk material, characterized in that the center of the material segment is attached to the support minutes as a rod, and to the bottom of the cargo support is secured, the transverse dimension of which 35-50% less than the borehole diameter, the length of support commensurate with the load with the length regales.