SU1293346A1 - Method of hydraulic breaking of rock to be recovered from underground formations - Google Patents

Abstract

The invention relates to mining, is used in downhole hydraulic extraction of minerals, and increases the efficiency of hydrotreating of rock mass by increasing the scouring capacity of a gas-liquid jet. The deposit is opened by the borehole 1, in which the jetting unit 2 is placed. A gas-liquid mixture is supplied and the rocks are washed out in ascending layers. Radial vertical slits 3 are preliminarily cut within each layer. The rocks within each slit 3 are washed out from the bottom up. Then between the gaps 3, the pillars 4 are cut off by sector-like horizontal slots 5. Most of the gas-liquid jet during its entire operation on the rock operates in a free mode, which increases its erosion capacity. 2 Il. 3 (L

Description

1, 12

The invention relates to mining and can be used in downhole hydraulic testing, downhole hydraulic mining, as well as in various areas of geotechnology.

The purpose of the invention is to increase the efficiency of the hydraulic mining of the rock mass by increasing the erosion capacity of the gas-liquid jet.

FIG. 1 shows a general scheme of mining; in fig. 2 - sweep in a circular section along a circle.

The method is illustrated by the example of testing a thick pool. The specified reservoir is opened by a well of 1 l in which the well assembly is placed downhole 2. The gas-liquid mixture, for example water and air, is supplied through the pressure column of the assembly. The erosion of the rocks is carried out in an upward order. Radial vertical slits 3 are preliminarily cut within each layer with the washout of slits in the bottom-up direction. As studies have shown, in this order of scouring of the slits, an air cavity forms under this top face, i.e. The structure works in the submerged bottomhole, which, by cutting, increases the efficiency of rock destruction within each slot 3. Fine fractions, such as clayey and fine sand, are carried by gas-liquid flows from the slots to well 1 and further to the surface. After all the slots 3 have been made, the pillars D between the gaps from the array are cut off by sequentially cutting through the sector-like horizontal cuts 5 in the pillars 4 between the gaps 3 at the upper level. faces 6 of these slots 3. When erosion of the slots 5 gas-liquid jet

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also works in an air bag, which increases its erosion capacity. Thus, during the whole action of the gas-liquid jet for the 5th breed, most of the jet operates in the free bottom. This allows to reduce the costs of rock disintegration and to increase the radius of action of the jet.

After the pillars 4 are cut off, they break into the soil of the chamber, while their collapse leads to partial disintegration of the breeds of the pillars, which continues under the influence of water, as well as the subsequent dispersion of the gasified rocks by a gas-liquid jet to ensure the release of this rock to the surface.

Claims (1)

Invention Formula Method of hydrotreatment of rocks when they extracting from subterranean formations, including opening the horizon with a hydropower well, placing a hydromonitor assembly in it, washing the reservoir with layers of a working agent with a layer collapsing on the soil of the chamber, characterized in that, Radial vertical slits are preliminarily cut within the layer; rocks are eroded within each slit in a bottom-up direction, and then cut-off from the array of the formed mea are carried out; up to the gap of the pillars at their upper level, by successive formation of sector-like horizontal slots. FIG. 2 VNIIPI. Order 359/34 Circulation 455 Subscription Production.-Polygram. pr-tie, Uzhgorod, st. Project, 4