SU1452999A1 - Method of mining water-saturated mineral deposits - Google Patents

Abstract

The invention relates to mining and m. used in mining of steeply dipping ore bodies under complex hydrogeological conditions. The goal is to increase the intensity and safety of the development of crupadadil “limited” deposits. From underground circular horizontal workings, passed around the ore body in the near-contact zone of the field in the host rocks, vertical plugging wells are drilled for the entire thickness of the aquiferous zone. They tampon the enclosing subfloors with special tampon solutions and create an anti-filtration cementing curtain around the watered part of the ore body. After pre-water suppression, ore is excavated along the contour of the ore body by horizontal layers. Ore extraction in each layer is carried out by a camera with chambers oriented along the lines of chords, which are tangent at the point of intersection with the contour of the ore body in a horizontal section angle of not more than 72, Cameras in each subsequent layer, they are oriented at mirror-symmetrical angles with respect to the chambers of the previous layer. The laying of the above tiled layer space is carried out to form an annular concrete shell. The latter is created with an increase in its width with depth towards the ore mass in proportion to the increase in rock pressure. The ore massif inside the shell is worked out with a lag in relation to the excavation of ore along the contour of the ore body for the period of recruitment by the shell of normative strength and stability. 2 z.Po f-ly, 2 s. Q $ (Л с: 4ib СД СО СР

Description

ten

 1452999

The invention relates to mining and can be used in the extraction of minerals in steeply dipping mines in complex hydrogeological conditions, such as kimberlite diamondiferous pipes, rod-like deposits of tin, gold, and so-called, and does not exclude the possibility of using on horizontal, flat and inclined deposits or their separate sections.

The purpose of the invention is to increase the intensity and safety of the development of steeply dipping deposits.

FIG. 1 is a schematic diagram of the development of FIG. 2 is a horizontal section of the layer to be removed along the contour of the ore body,

The method is implemented in the following way.

From underground circular horizontal workings 1, passed around the ore body 2 in the near-contact zone of the deposit in the enclosures of the rocks 3. rocks vertical vertical oil wells 4 are drilled for the entire power of the aquifer zone 5, tamponier 5to enclose the rock with special cement slurries and create around the watered part of the ore body against the mineral body. tanponazhnuyu-veil. After pre-water suppression, the ore in the marginal part of the ore body is advanced ahead of the central ore body, starting from the bottom of the pit 6, with the horizontal layer oriented along the chords 11 at an angle to the tangent 12 that are led to the contour 13v at the intersection point of the chord in horizontal section.

When changing the orientation angle of the excavation chambers ": ranging from

2- TO O

the resultant shear

force Rl-,

/ J-, acting on the mating vertical faces of concrete blocks constructed by laying excavation chambers with hardening mixtures, changes its sign from - to + at -oi. 72 and with decreasing rpm to 0 ° increases dramatically, trying to move the blocks towards the host array, which is kinematically impossible. The normal resultant force P monotonously increases with the variation of the angle about within the indicated limits by approximately 33% of the nominal value at

 TG 25 2 increases by about 5%.

at e6 72 "If for technological reasons the orientation angle of the excavation chambers cannot be taken equal to the optimum" L 72%, then it is determined

35

based on the technical and economic calculations of the effectiveness of the construction of the containment shell, taking into account the increase in its thickness, is proportional to the increase in the magnitude of the normal resulting force PJ, with a decrease in the orientation angle. Orientation of excavation chambers along chords located at optimal angles

with laying the worked out to tangent, carried out to the contour-space by solid mixtures 7, the lines in the dwarf under construction, thus developing around the centro-horizontal layer, will provide the maximum part of the ore massif with maximum stability of concrete blocking concrete the shell is relative to each other and the whole wall 8 with a variable concrete depth in the layer in the layer as a design of the wall thickness by dredging

and the subsequent laying of each underlying layer in the plan is wider than the one preceding. Then otrabatsya with an open cleaning space without leaving pillars in the fall of the ore massif inside the concrete shell with a lag from the notch of the marginal part

50

for a period that provides a set of regulatory strength and stability of the shell when it is exposed in the process of mining the ore mass 9.

With the construction of concrete rings sheath excavation chambers 10 to each

tively unified system under the influence of rock pressure forces from the side of opposing rocks.

The extraction chambers and, consequently, the concrete blocks during the construction of the protective rings of the shell in each subsequent ore layer being developed are located at mirror-symmetrical angles with respect to the direction of location, the extraction chambers in the previous layer relative to the direction of external forces of rock pressure from the surrounding rocks. Those. if in the upper adjacent layer

r

P

The horizontal layer of the house is oriented along the chords 11 at an angle to the tangent 12 drawn to the contour line 13v at the point of its intersection with a chord in a horizontal section.

When changing the orientation angle of the excavation chambers ": ranging from

2- TO O

the resultant shear

force Rl-,

/ J-, acting on the mating vertical faces of concrete blocks constructed by laying excavation chambers with hardening mixtures, changes its sign from - to + at -oi. 72 and with decreasing rpm to 0 ° increases dramatically, trying to move the blocks towards the host array, which is kinematically impossible. The normal resultant force P monotonously increases with the variation of the angle about within the indicated limits by approximately 33% of the nominal value at

 TG 5 2 increases by about 5%.

at e6 72 "If for technological reasons the orientation angle of the excavation chambers cannot be taken equal to the optimum" L 72%, then it is determined 0

to tangents drawn to contour lines in a pile of developed horizontal layer will ensure maximum stability of the concrete blocks relative to each other and the entire concrete ring in the layer as a construction

0

five

tively unified system under the influence of rock pressure forces from the side of opposing rocks.

The extraction chambers and, consequently, the concrete blocks during the construction of the protective rings of the shell in each subsequent ore layer being developed are located at mirror-symmetrical angles with respect to the direction of location, the extraction chambers in the previous layer relative to the direction of external forces of rock pressure from the surrounding rocks. Those. if in the upper adjacent layer the camera orientation angles are assumed to be oi, 72, then in the underlying adjacent layer the cameras are oriented at angles /. lami ei i (4 + 18). So constructive

the location of the blocks in layered concrete rings ensures uniform

of the developed space of layers with the formation of an annular concrete shell and the mining of the ore massif inside the shell, characterized in that, in order to increase the intensity and safety of the development of limited in terms of steeply dipping deposits,

GTRDL w / b-v.4-- iiJ - -

loading of the entire protection under construction, each layer is guided by cameras with the orientation - ,, „-, -„ G-hl-L. P1.TIGY. Ro

sheath along its height and increases its structural stability about

After the construction of a protective concrete shell at an optimum depth determined by a technical and economic calculation, the further development of the ore body is carried out by continuous systems of development using horizontal layers with a full padding of a high-density space with hardening mixtures

Claims (3)

1. The method of development of flooded mineral deposits, including the penetration of 1x excavations, preliminary water supply15 The camera chambers along the lines of the chords that make up the tangent at the point of intersection with the contour of the ore body in a horizontal section are an angle of ot 72, and the concrete shell is created with an increase in its width with a depth in the direction of the ore massif proportional to the increase in rock pressure, 2. The method according to claim 1, of which is that the ore massif inside the shell is worked out with a departure from the ore body along the contour of the ore body during the collection period of the standard shell and sustainability. 3. The method according to 1, characterized in that the chambers in each subsequent layer are oriented at mirror-symmetrical angles 20 mj Q. i J 1. CG i ore excavation along the ore contour of the ore in relation to the chambers of the previous body, horizontal layers, laying R 2999 of the developed space of layers with the formation of an annular concrete shell and the mining of the ore massif inside the shell, characterized in that, in order to increase the intensity and safety of the development of limited in terms of steeply dipping deposits, each layer of the cameras are guided with the reference point, „, -, - G - ch gt-L. P1.TIGY. Ro The camera chambers along the lines of the chords that are tangential at the intersection point of the ore body contour. in horizontal section, the angle is ot 72, and the concrete shell is created with an increase in its width with a depth in the direction of the ore mass, proportional to the increase in rock pressure, 2. The method according to claim 1, about tl and h ayu yi, and with the fact that the ore massif inside the shell is worked off with a departure from the ore body along the contour of the ore body for a period of collection by an annular shell of standard strength and sustainability. 3. The method according to 1, characterized in that the chambers in each subsequent layer are oriented at mirror-symmetrical angles P-} I about 4 1g but vPo   t / ; z P ; / Fie.2