SU1328526A1 - Method of producing underground cavities through wells - Google Patents

Abstract

The invention relates to the field of mining, geology and construction, and m. used in the well hydrodiobye minerals, testing of productive horizons and the construction of underground storage facilities. The goal is to increase the efficiency of formation of underground tanks by ensuring the reliability of roof formation. Drill a production well to the top, the boundary of the formation of capacity. In the well placed jetting. unit. The erosion of the radial petal-like inlets 3 is carried out with the withdrawal of their bottomhole zones beyond the limits of the tank 5 and the thick pulp to the surface. Between the stoppers 3, the pillars 4 are left. Then hardening material is injected into the stowers 3. After the material gains strength, the erosion of the inlets 6 in the overlying layer with their location above the pillars 4 is carried out. container boundaries 5. Then hardening material is introduced into the upper stowings 6. Over the future capacitance 5, an overlap is formed. After the roof has been made of hardening material, a cement plug is drilled, the hole is dredged and the chamber 5 is washed out with thick pulp. 3 il. . With oooo 00 ate GS O)

Description

one

This invention relates to mountainous

business, geology and construction and can be used in the downhole mining of minerals, testing of productive horizons, as well as in the construction of underground storage facilities.

The purpose of the invention is to increase the efficiency of formation of underground; tanks by ensuring the reliability of the formation of the roof,

FIG. Figure 1 shows the scouring pattern of the underlying approaches; in fig. 2 - a washout pattern for overshooting; in fig. 3 - the scheme of superposition of the contours of the overlying and underlying approaches, the plan.

The method is carried out as follows.

Up to the upper boundary of the reservoir being formed, a well 1 is drilled, in which a downhole jetting unit 2 is placed. Using the latter, the radial lobe-shaped approaches 3 are washed out directly above the indicated upper boundary, leaving a pulp to the surface and leaving wedge-shaped pillars 4 between the entries 3, which prevent the collapse of weak rocks in the developed space of these stopovers. The erosion of the inlets is carried out with the withdrawal of their downhole zones beyond the boundary 5 of the extraction of rocks during the formation of the tank. After washing out the inlet 3, a hardening material is injected into them, for example, cement mortar. During the erosion of the inlets after the material hardens, around the well 1 at the level of inlets 3, a zone of well formation is formed, filled with hardening material. Due to the presence of this zone, the erosion of the pillars 4 at the level of the positions 3 becomes impossible.

In order to create a solid block after curing with hardening materials in the bores 3, the well assembly 2 is raised and the similar bores 6 are washed out at a higher level. Dan The nodal shifts are relative to the nipples 3 and position above the pillars 4, while unwinding the nipples 6, the contours of the latter are imposed on the contours of the nipples 3 to form the nesting zones 7 within the extraction boundary 5, i.e. boundaries of future capacity. The erosion of the entries 6 is made so that the exposed

it hardens ;; the 1st material in the 3-step perimeter, i.e. within zones 7 and overlap, this allows one to achieve that after the hardening material is introduced into the upper loops 6, the monolithic blocks in these loops rely on the monolithic blocks of the hardened material in the lower loops 3, i.e. As a result, a continuous overlap is formed over the future tank, while the peripheral zone of this overlap is located outside the extraction boundary 5 and, upon the formation of the tank, rests on the rock mass. At the same time, each monolithic petal of the overlying patches 6 rests on its edges on two monochs: the natural petals of the underlying patches 3.

After creating the specified roof of hardening material, the cement plug is drilled and the hole is buried. us 1 in the rocks to be extracted.

A hydromonitor assembly is placed in the indicated well and the rocks are washed out with the formation of a chamber within border 5 with the delivery of pulp to the surface under the protection of an artificial roof.

Claims (1)

Formula invented five 0 five 0 five A method for the formation of underground tanks through wells, including drilling a production well to the upper boundary of the reservoir being formed, forming an artificial roof cavity, forcing hardening material into it, deepening the wells to the height of the reservoir, hydraulic mining the rocks under the roof with thick pulp onto the surface characterized by , in order to increase the efficiency of formation of underground tanks by ensuring the reliability of the formation of the roof, the roof cavity is formed in the lower layer of unstable rocks in the form of radial petal-like inlets with the withdrawal of their downhole zones outside the tank, then hardening material is injected into the inlets and after curing with this material, the erosion is performed in the overlying layer with their location above the rear sections between the underlying inlets and partially stripped of the latter and with superpositions on the contours of the underlying. within the confines of the container, then the editor I. Nikolaichuk Compiled by N. Chertova Tehred I. Ver her Order 3464/36 Circulation 454 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 the upper layer, and after it is solidified, the well is sunk. (Rig.1 TO / g Rig.2 Proofreader A.Zimokosov