SU1492058A1 - Method of excavating materials from thick underground formations - Google Patents

Abstract

The invention relates to mining and geology and can be used in downhole hydraulic mining and in the creation of underground cavities. The purpose of the invention is to extract large volumes of rock at a considerable distance from the central borehole from different horizons while simultaneously improving the conditions of hydrotransport. The method is carried out as follows. A powerful underground formation is opened by a central production well (C) and peripheral explosions C located radially from the central one. Within each direction, the bottoms of explosive C in a vertical plane are placed on a line that has a slope towards central C. Then, an explosive substance (HE) is placed in the downhole part of central C and crushing, washing out and hydraulic lift are performed, forming a central cavity. After that, explosive charge is placed in the adjacent C central explosive C and the rocks are blown up with their release into the central cavity and the formation of a peripheral cavity. Hydraulic lift of the blasted rock from central C is carried out, while water is supplied through explosive C. Then, rocks are blown up in the next peripheral C, and rocks are released into the peripheral cavity and washed away to the bottom of the central C feedwater. .

Description

(21) 4320201 / 23-03

(22) 10/22/87

(46) 07.07 „89. Bup. Number 25

(71) Moscow Geological Prospecting Institute. Sergo Ordzhonikidze

(72) M.M. Smirnov, V.S. Kozlov, V.RoBunov and A.V. Yuroyts

(53) 622.234.5 (088.8)

(56) USSR Copyright Certificate No. 1257223, cl. E 21 C 45/00, 1985.

USSR Author's Certificate No. 1065604, cl. E 21 C 45/00, 1982.

(54) METHOD FOR EXTRACTING MATERIALS FROM POWERFUL UNDERGROUND FORMATIONS

(57) The invention relates to mining and geology and can be used for well mining.

and when creating underground cavities. The purpose of the invention is to extract large volumes of rock at a considerable distance from the central well from various horizons while simultaneously improving the conditions of hydrotransport. The method is carried out as follows. Powerful underground

the fraction is opened by the central production well (s) and peripheral explosions C, located -) 1m radially from the central one. Within each direction, the bottoms of explosive C in a vertical plane are placed on a line that has a slope towards central C. Then, a bristle substance (BB) is placed in the downhole part of C and crushing, erosion and hydraulic lifting are performed, forming a central cavity. After that, explosive charge is placed in the adjacent C central explosive C and the rocks are blown up with their release into the central cavity and the formation of a peripheral cavity. Hydraulic lift of the blasted rock from central C is carried out, while water is supplied through explosive C. Then, rocks are blown up in the next peripheral C, and rocks are released into the peripheral cavity and washed away to the bottom of the central C feedwater. .

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The invention relates to geology and mining, and can be used when testing a formation, in downhole hydraulic mining, as well as in creating subsurface cavities. The purpose of the invention is to extract large volumes of rock at a considerable distance from the central well from various horizons while simultaneously improving the conditions of hydrotransport.

Figure 1-3 presents diagrams illustrating the sequence of operations of the method; FIG. 4 is a section A-A in FIG. 3.

The method is carried out as follows.

1D

0 Tpof: ir:, a; 4 Mf), shkhizsmiki formation pre-drilled price- TpajibiivTO production well

1and in the radial directions of a number of peripheriums of explosive squatters 2 and 3 of small diameter. B, within each direction of the blast hole.

2 and 3 in the vertical 1-1-rock plane are placed on line A, which has a slope towards the bottom of the central well 1. Depending on the specific mining and geological conditions, the specified slope is taken on the basis of the hydrotransport of the blasted rock from each peripheral well to the central one when it is flushed with water.

SaTCN; and the downhole part of the central well 1 places an explosive charge and crushes the rocks, forming a zone of weakened rocks, after which the downhole gyromonitor assembly 5 is lowered into the well, which erodes the blasted rock and hydraulically lifts it to the surface, resulting in a central cavity 6 is formed.

Thereafter, an explosive charge is placed in the explosive well 2 adjacent to the central well 1 and the rocks are blown up and released into the central cavity 6. To ensure such a mode, the distance between wells 1 and 2 should be determined by known methods, and also based on experimental experimentation. In the well 1, the well jet unit goes down again, with the help of which the rocks are washed out and hydraulically lifted. At the same time with. through this, water is pumped through the borehole 2, which flushes the remaining rock from the newly formed first peripheral cavity 7 into the cavity 6, from where it flows to the surface. The previously selected slope contributes to the efficient hydrotransport of the blasted rock mass from cavity 7 to cavity 6.

After the rock has been completely washed away, a charge of explosive is placed in the well 3 and an explosion takes place.

the formation of rocks on the first peripheral cavity 7 with the removal of rocks in this depth

Q 5

0 5

ZO.

five

five

five

los t, as well as into the cavity 6o B of the well 2 and 3, simultaneously supply water, flushing the rock to the slaughter in the central cavity 6, thus forming; a second peripheral cavity 8. From cavity 6, a rock that is washed away from cavities 7 and 8 is discharged to the surface. If there are additional wells in the radial engraving, all the above operations are repeated.

After working all the wells in one radial direction in the same sequence, the mineral is extracted in another radial direction.

Claims (1)

Invention Formula A method for extracting materials from powerful underground formations, including opening the formation with a central production well and peripheral explosives located in the radial direction from the central one, blasting rocks through the periphery; rocks from the central well with their hydraulic lift to the surface, characterized in that, in order to extract large volumes of rock at a considerable distance from the central well from different horizons while simultaneously improving the conditions of hydrotransport, peripheral explosive wells are drilled with the location of their bottom holes within each direction lines with a slope in the direction of the bottom of the central well form a central cavity by blasting rocks at the bottom of the central well, scouring them and raising them, after which they d t rock blasting in an adjacent central peripheral well with rock ejection into the central and a cavity and forming a peripheral cavity, and when hydraulically lifting the detonated rock, water is supplied to the detonation well, then the rock is detonated in the next peripheral well and flush the rock to the bottom of the central well by supplying water to both blast holes. Phi2.1 FIG. I