RU2015258C1 - Method for formation of working in soil and device for its realization - Google Patents

Abstract

FIELD: formation of workings in soil. SUBSTANCE: method consists in acting on face of working with jets of working fluid coming from inner space of working member at pressure which is augmented by supply of gaseous agent into inner space of working member. In this case, acted on working face are jets of gaseous agent. Device for formation of working in soil has working chamber, drive drum with flexible hose wound on it, working fluid supply source and gaseous agent supply source. Drive drum is located in working chamber. Free end of flexible hose is turned inside out and secured to outlet of working chamber. Supply sources of working fluid and gaseous agent are communicated with inner space of working chamber. EFFECT: higher efficiency. 2 cl, 2 dwg

Description

 The invention relates to the field of development of soil or rocks by liquid jets under pressure and can find application both in construction and in mining during downhole mining of minerals.

 A known method of developing soil, end or open pits by using a pressure jet of liquid: destroy the soil, and then together with water it is transported to the place of separation from the liquid and accumulation.

 However, this method cannot be used to perform wells or horizontal drifts in the thickness of the soil.

 Closest to the claimed is a method of forming a mine in the soil [1], which consists in exposing the soil to jets of working fluid flowing out of a hydraulic ripper made in the form of a segner wheel.

 The disadvantages of the method: low efficiency of soil destruction, high energy intensity of the destruction process.

 Known soil-laying installation [2], containing a punch connected to the sleeve, inside of which there is a flexible element fixed at one end to the drum, and the other connected to the punch, and the connection is made in the form of a shock-absorbing element.

 The disadvantage of this device is the low efficiency of its work.

 The aim of the invention is to increase the efficiency of soil destruction while reducing the energy intensity of the destruction process.

 For this, in the method of generating a working hole in the soil, according to which the working face is impacted by jets of working fluid that comes from the internal cavity of the working body under pressure, according to the invention, the pressure of the working fluid supplied to the working face is periodically increased by supplying a gaseous agent to the internal cavity of the working body under pressure , exceeding the pressure of the working fluid in the internal cavity of the working body, while the bottom of the mine is periodically affected by gaseous agent jets.

 In addition, in the device for the formation of a mine in the ground, including a working chamber, in which a drive drum with a flexible sleeve wound thereon is placed, the free end of which is turned inside out and fixed on the outlet of the working chamber, and a source of working fluid supply, which is communicated with the internal the cavity of the working chamber, according to the invention, it is equipped with a source of supply of a gaseous agent, which is in communication with the internal cavity of the working chamber, while the sleeve is made with through holes located along its length holes that form nozzles for supplying a working fluid and a gaseous agent to the bottom of the mine.

 Figure 1 shows the proposed device; figure 2 is the same in operation.

 The device has a sealed chamber 1, in communication with the fluid supply system 2, and a reversible drive drum 3 with a sleeve 4 wound thereon, mounted inside the sealed chamber 1. The second free end 5 of the sleeve 4 is turned inside out and fixed in the outlet pipe 6 of the chamber 1. Through the length of the sleeve 4, through holes 7 are made, forming nozzles for supplying a working fluid and a gaseous agent to the bottom of the mine. The sleeve can be made of polyurethane 1 mm thick with two holes per 1 running meter in 4 rows along the entire length. The diameter of the through holes 7 is five to ten millimeters. The sealed chamber 1 is also in communication with the system 8 of a pulsed supply of a gaseous agent into the liquid under high pressure.

 The implementation of the method and the operation of the device are as follows.

 In the ground, preliminary development is made in the form of a cavity and a pit. The device is installed in the pit and the outlet pipe 6 of the sealed chamber 1 is introduced into the pre-made output. Then, the system 2 feeds into the chamber 1 a liquid under a pressure of 2 MPa. By the pressure of this fluid, the sleeve 4 is wound off the drum 3 and enters into the depths of the mine. Liquid escapes through holes and acts on the walls of the mine in the ground. When the end 5 of the sleeve reaches the end wall, the pressure in the sleeve increases. At this point, the system 8 is impulsively under even greater pressure, for example 5-10 MPa, a portion of a gaseous agent, such as compressed air, is fed into the chamber 1. The result is a pneumohydraulic explosion. In this case, air (gas) through the openings 7 leaves the sleeve with even greater force and sparges the liquid in the sleeve space. After that, the pressure in the sleeve is dropped to 1.5-2 MPa. As a result, air bubbles collapse and the cavitation process increases, in which particles of the destroyed soil take part. Due to hydraulic explosion and cavitation, the soil collapses to very small fractions and is carried out by a fluid stream from the sleeve space into the pit, from where it is removed in a known manner. By reversing the movements of the end of the sleeve 5, the process is intensified due to its winding and unwinding. This entire cycle is periodically repeated.

 The invention can be used for laying channels in the ground, for laying passages under roads and in railways. embankments without their destruction, while achieving a large effect at lower energy costs. It is possible to use low-power compressors, since insignificant volumes of the sleeve allow for an increase in pressure, and it is also possible to maintain the water pressure in the annular sleeve space at low energy consumption.

Claims (2)

 1. The method of generating a working hole in the soil, according to which the working face is impacted by jets of working fluid, which comes from the internal cavity of the working body under pressure, characterized in that the pressure supplied to the working face is periodically increased by supplying a gaseous agent to the internal cavity of the working body under pressure , exceeding the pressure of the working fluid in the internal cavity of the working body, while the bottom of the mine is periodically affected by gaseous agent jets.  2. A device for producing a mine in the ground, including a working chamber, in which a drive drum is placed with a flexible sleeve wound on it, the free end of which is turned inside out and fixed on the outlet pipe of the working chamber, and a source of working fluid supply, which is in communication with the working cavity chamber, characterized in that it is provided with a source of supply of a gaseous agent, which is in communication with the internal cavity of the working chamber, the sleeve is made with through holes located along its length, the cat Some form nozzles for supplying a working fluid and a gaseous agent to the bottom of the mine.

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