SU1167340A1 - Method of restoring mine workings - Google Patents

Description

The invention relates to the mining industry and can be used to restore capital workings with deformed lining.

There is a method of mounting mining, including the injection of fastening solution in the rocks of the disturbed zone under a protective coating with the simultaneous construction of the facing-bearing shell and plugging rocks with one piece of equipment [1].

There is a method of restoring mining, including the construction of the inner facing-bearing shell and the outer shell of reinforced rocks [2].

The disadvantage of these methods is that when they are used to restore the deformed workings, the rocks around the support workings, as well as the lining itself, are inevitably strengthened. When expanding production to the design dimensions, the removal of hardened lining and hardened rocks within the design section of generation requires increased labor costs. In addition, the hardening of loaded rocks, within the design section of generation, is accompanied by an additional consumption of binding materials.

The aim of the invention is to reduce the consumption of materials and the complexity of the work.

This goal is achieved by the fact that according to the method of recovery of mine workings, including the erection of the internal facing-bearing shell and the outer shell of reinforced rocks, tampon hole boreholes are drilled to the border of the design production loop fixed with metal lining, and the injection is produced by non-bonding material to fill voids in the destroyed rocks within the contour of production, then add the plugging holes to the outer border of the zone of rock hardening, into which the reinforcement solution is injected, after setting, which removes the deformed lining and sealed rock with non-binding material within the design contour of the mine.

In addition, the plugging of rocks within the design contour of the production of non-binding material is conducted from top to bottom, controlling the distribution zone by means of test holes, and the excess solution is discharged through adjacent cement holes and used for re-injection.

FIG. 1 schematically shows the development with the actual and design position of the lining and the upper boundary of the collapse, a longitudinal section; in fig. 2 - section A — A in FIG. 1 (production with plugging holes drilled to the boundaries of the design production contour); on

FIG. 3 - section B — B in FIG. 1 (production, with plugging holes, drilled to the border of the hardening zone);

in fig. 4 — section B — B in FIG. 1 (finished production).

The method is as follows.

In the restored excavation 1, the deformed lining 2 is sealed (for example, by gunning) and cement holes 3 are drilled in the sides and roof of the excavation up to the boundaries of the design excavation contour 4. Through holes 3, tamponing of rocks is performed within the limits of the design contour 4 of generation of a non-binding material with a thick consistency (for example, a clay solution). The direction of the plug-in is from the top down, with the control of the spread of the solution through the adjacent plug holes 3. For this purpose, control tubes are inserted at a predetermined depth, which are removed before further plugging.

Considering that under the conditions under consideration, the cement slurry under the action of gravity propagates bell-shaped around the cement hole 3, changing the density of the solution and the location of cement holes 3, it is possible to create a curvilinear shell of a given thickness around the rocks from rocks filled with non-bonding solution.

After plugging the rocks with a non-bonding solution in the roof of the excavation, the plugging holes 3 are drilled to the outer contour of the hardening zone 5 and, through the pre-drilled parts of 6 boreholes 3, inject the binder solution, which strengthens the rocks outside the design contour 4 of the excavation. Within the design contour 4 of development, broken rocks do not have voids, since they are already filled with non-binding material, which makes it impossible for the binder solution to enter this zone.

After hardening the hardening solution and creating a zone 7 of hardened rocks, the deformed lining 2 is removed, the rocks are excavated within the design contour 4 of the mine under the protection of the strengthened rock shell 7, and then a permanent lining is erected (for example, the walls and roof of the sprayed concrete are fixed and fixed ).

Two-stage plugging of unloaded rocks in the repair of deformed workings with non-bonding material and reinforcing solution allows expanding the field of application of the plugging method for rehabilitation works, excluding rock production from the limits of the collapse arch, eliminating the consumption of materials for filling voids for lining,

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1167340

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to ensure a high level of safety of work, as well as to reduce the consumption of scarce binder and labor intensity of work

on excavation of rocks within the project production line and in restoring the development as a whole.

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Claims (2)

1. METHOD OF RESTORING MINING DEVELOPMENTS, including the construction of the inner facing carrier shell and the outer shell of reinforced rocks, characterized in that, in order to reduce the consumption of materials and labor-intensive work, the plugging holes are drilled to the border of the design contour of the production with a fixed metal support, the injection is produced by a non-bonding material to fill the voids in the destroyed rocks within the limits of the production contour, then the plugging holes are drilled to the outer border of the zone of rock hardening , into which the strengthening solution is injected, after setting of which, the deformed lining and the rock sealed by non-binding material are removed within the design contour of the mine. 2. The method according to π. 1, characterized in that the plugging rocks within a project outline generating material are disconnected from the top down dissemination _of controlling by a controlling zone 9 GOVERNMENTAL drilling, and the excess solution is discharged through holes adjacent tamping and used for re-injection. zi 1167340 > C & Fig.) 1167340