SU1501926A3 - Method of shutting-off hollow underground formations and conduit systems with high-velocity water flow - Google Patents

Abstract

Holes are drilled from the surface into the hollow formation. At least one hole, intended for drainage, is equipped with an open casing pipe. The other holes are used for injecting strengthening solution. Before injection, cavities are filled with rock while water is drained. The intensity of drainage is boosted by pumps. - In the water entry and discharge zones, regions of low hydraulic resistance are created using large-sized rocks. The inter-zone region is filled with finely graded material of high hydraulic resistance. The holes for feeding the materials are filled with a strengthening solution to complete the formation of the water covering zone.

Description

The invention relates to mining and is used when shutting off flowing water in underground natural and artificial hollow formations or duct systems (passages).

31501

The aim of the invention is to improve the reliability of overlapping underground hollow formations in places inaccessible to humans from water flowing at high speed.

FIG. 1 to 5 show the steps of the method when wells have been drilled from the surface of the earth; in fig. 6 and 7 show the method for carrying out the process with the horizontal direction of water flow; in fig. 8 and 9 is a diagram of the method implementation using drilling and blasting operations; in fig. 10 and 11 illustrate a method for processing a rock with various methods.

The method is carried out as follows.

In the underground floor formation 1 after determining in a known manner its position from the surface 2 of the earth, the drills equipped with casing for draining the well 3 into the water supply zone A. The longitudinal axis of the drainage wells 3 approximately coincides with the direction of flow of the casing strings the drainage wells 3 equipped with them above the sole of the hollow formation 1 are adjusted so that the water of the water supply zone can flow freely into the pipe. In the drainage zone 5 of the hollow formation 1 in the pipes of the drainage wells 3, the holes 6 for diverting water are perforated.

After drilling, the wells 7 for laying the filling material and injection wells 8, through the wells 7, begin the laying of the appropriately sized fractions of the fractions, most appropriately of the filling material mixed with water. In zones A and 5, a zone of small hydraulic resistance is created from coarse materials. The zone chosen for overlapping between them is filled with a fine-grained filling material with a high hydraulic resistance for subsequent injection.

In drainage wells 3, the amount of water flowing is measured by a known method and known equipment between the water inlet zone A and the outgoing water zone 5. If the filling volume is successful, the wells 7 are filled with a reinforcing slurry, such as cement paste. Behind

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Meanwhile, through the wells 8, the cement paste is introduced into the volume for the filling material 9 and a water-covering zone 10 is created.

The filling of injection wells 8 is carried out from the bottom up continuously. It is imperative that a known selective injection be applied in individual sections or zones, with the casing of the wells 8 being perforated in the sections for injection and the injection site is covered with two packers.

Then, the drainage wells 3 provided with the casing are overlapped, if water blocking zone 10 has already sufficiently hardened and water flow measurements carried out in water discharge wells 3 show that there is no more water flow over water blocking zone 10, but the flow continues, water intake does not exceed the permissible norms. Otherwise, further injection of bonding solutions should be carried out, if necessary with the laying of new wells 8

for injection.

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After the measurements have been made, the drainage wells 3 are temporarily blocked with packers. 11, which can be positioned using hollow link mechanisms 12. After this, the effectiveness of the overlap is monitored. With a positive control result by means of lever mechanisms 12, all diverting wells 3 are filled with fastening material, for example, cement plugs 13. For large water flows, a large consumption of sealing material is required and a water-tight outer zone 1A is created around the hollow formation.

Consider the case when the water flow is directed horizontally and through the water channels 15 and discharge 16 are flooded below located mine workings 17. For laying of the drainage well 3, only the not yet flooded mining equipment 18 can be used above. Proventer 19 is laying a drainage well 3, the longitudinal axis of which approximately corresponds to the direction of water movement in the block to be closed.

subterranean zone (floor formation 1) Next, wells 7 are laid to lay the material and 8 wells are used for injection, which are used similarly to those described above.

When the indicators of the water flow system are unsatisfactory, not only the sealing material introduced through the wells can be used as the filling volume of the material, but also the pieces separated from the rock as a sealing, filling and filling material.

If the subsurface duct system (hollow formation) to be blocked has irregular contours, i.e. It consists of cavernous passages in the rock, and its position is difficult to determine, its shape is changed using drilling and blasting.

Yurfs 20 are made from the surface 2 of the earth and explosive charges 21 are laid in the required amount in a known way 25 in them. Holes or holes are provided with an appropriate seal. At the site of a hollow formation of 1 unknown contour and extended through the massif, lumpy matter is filled after blasting, rock fracture is formed and at the same time flowing water crushed rocks and partially - discharged through drainage wells and then filled with material 9 not flooded - then through wells with filler.

1. A method for blocking hollow subterranean formations and flow systems with water flowing at high speed, including drilling open wells for entry and exit of water, draining water from one of them, and forcing bonding solutions into the rest to form a stop zone for water, characterized by that, in order to increase the efficiency of blocking hollow subterranean formations by blocking them, in hard-to-reach places, at least one well designed to drain water, the longitudinal axis of which coincides with the flow of water, is equipped with the casing, which is open on both sides, is hollowed, while prior to the injection into the wells of the bonding solutions of the cavity

a water cave, in which a drainage system is first laid at the well 3, and then well 7 for the filling of the filling material. In the intermediate spaces, grooves and cracks between the blown-up pieces of rock, as well as in the remaining hollow spaces, fine granular material lingers. Next, perform operations similar to those described above.

If in the space intended for blocking water (floor formation 1) in zones 4 and 5, the properties are changed and the drainage well 3 does not have direct hydraulic contact with low resistance, by means of a packer injection pipe 21 with injectable liquid 22 in a known manner with Using known means by layer processing according to Frac, the specified connection 23 is provided with low resistance, first in zone 4 and then in zone 5.

Offered p1 | way - even with changes in natural ratios in

the massif is filled with lumpy rock material and at the same time the flowing water is discharged through the drainage wells and then through the wells filled with.

The conditions of fast flowing water ensure reliable overlap. The method requires the flooding of mine workings and / or other underground hollow formations with a view to reliably blocking them in the standing water.

Claims (8)

1. A method for blocking hollow subterranean formations and flow systems with water flowing at high speed, including drilling open wells for entry and exit of water, draining water from one of them, and forcing bonding solutions into the rest to form a stop zone for water, characterized by that, in order to increase the efficiency of blocking hollow subterranean formations by blocking them, in hard-to-reach places, at least one well designed to drain water, the longitudinal axis of which coincides with the flow of water, is equipped with the casing, which is open on both sides, is hollowed, while prior to the injection into the wells of the bonding solutions of the cavity 40 g which have a zone passing through the created stop for water, the nocoje formation of which the wells finally overlap. 2, the method according to claim 1, distinguishing from that and that the wells for draining water, introducing a filling volume of the cavities of the lumpy rock material, and forcing bonding solutions from the surface of the earth. 3. A method according to claim 1, characterized in that the wells for the discharge of water are drilled underground from the mines, and the wells for filling with lumpy material of the rocks are drilled from the surface of the earth. 50 55 4. Method according to paragraphs. 1-3, in which the pre-contour and the length of the hollow formation or stroke system are modified, or modified, by explosions carried out with the help of completed wells. 5. Method according to paragraphs. 1-3 or 4, characterized by the fact that for filling cavities in the rock massif using the surrounding rock, crushed by explosions. 6, The method according to claims 1 to 3, about tl and - the fact that in wells for water discharge at the water inlet HhH water outlet to increase the capacity of the rocks, the surrounding rocks are treated with a hydraulic method, or acid, or crushed by explosions 2 breed, or a combination of these methods. 7. Method according to paragraphs. 1 and 2, which is ensured by the fact that the intensity of water flow in the wells for water drainage is enhanced by pumps by creating a stationary state of water in the subject to be blocked by the floor. 8. Method according to paragraphs. 1 and 2, characterized in that the water is diverted to a mining excavation connected to the water outlet. 77 / / l and / /// l IMI fc .j Fi.g (g / / 3 Fi.I / Fun.f. FIG. 6 1 10 S 15 15 18 P FIG. YU L nineteen Compiled by L. Berezkina Editor I. Rybchenko Tehred M.Hodanich Order 4897/59 Circulation 449 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 / J Fi9.I Proofreader M.Samborsk Subscription