SU1146457A1 - Method of constructing a water-impervious screen about mine workings - Google Patents

Abstract

METHOD OF STRUCTURES watertight barrier VOYURUG mining, tunneling comprising the wells and protect them from caving hardening solution, the formation of diametrically opposite slits along the generatrices and holes gidr.orazryv.- rocks by injection into the resulting cavity to hardening rastvrra clamping cracks to form around vfabotki zamnut circuit, Incidentally, in order to simplify the technology, the drilling of wells and the formation of diametrically opposite slits are performed simultaneously, while the well from collapsing hardening sol (A rum t derivatives to its introduction into the surrounding wellbore burly array and fracturing rocks is carried out after curing hardening solution in the rock .. about .2: 4: cl

Description

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FIELD OF THE INVENTION The invention relates to the mining industry and relates to the construction of waterproof screens around the mines: openings.

There is a known method of constructing anti-filtration curtains (screens), including drilling wells, forming slots between them with a high-pressure jet, filling them with a hardening solution tl.

The disadvantage of this method is the high consumption of water for the formation of slits.

The closest in technical essence and the achieved result to the invention is a method of constructing a waterproof screen around mine workings, including drilling wells and protecting them from breaking with a solid solution, forming diametrically opposite slots along the forming wells and hydraulic fracturing of the rocks, pumping them into the resulting cavities. hardening solution to closure cracks71 with the formation around the development of a closed loop U1.

The disadvantage of this method is the technical difficulties associated with the formation of diametrically opposed slots.

The purpose of the invention is to simplify the production technology.

The goal is achieved in that according to the method of constructing a waterproof screen around the mine workings, including the drilling of wells and 3aDi: iiTy them from collapsing hardening solution, forming diametrically opposite cuts along the forming wells and hydraulic fracturing of rocks by pumping into the resulting: Curing solution cavities to close cracks with formation around the development of a closed contour, the passage of ku-wells and the formation of diametrically opposite slits are complete simultaneously, while protecting the well from caving with a hardening solution, it is made by introducing it into the surrounding rock mass, and fracturing of the rocks is carried out after the hardening solution in the rock is cured.

FIG. Figures 1-6 show the phases for performing well drilling and serif formation in it to create directional hydraulic fracturing; in fig. 7 is a section A-A in FIG. 3; in fig. 8 is a section BB in FIG. 6

The method is carried out as follows. /

In the zone of the upper aqueduct 1, a recess 2 is prepared, in which a jig 3 is installed, and filled with concrete 4, thus creating a concrete pad. A piercer, for example, a hydraulic hammer 5 with drill pipes 6, is inserted into the conductor 3, the outer surfaces of the hydraulic device 5 and the pipes 6 being equipped with two opposing projections 7 of a predetermined section. A pump is connected to the drill pipes 6 and the working solution is supplied (for example, during solid-solution silicatization, four parts of liquid glass, one part of silicofluoric acid.

Through the watered formation 8, the borehole 9 passes to the lower water seal 10. The working solution (in the direction of injection 11) penetrates from the upper water seal 1 to the lower 10. in the watered formation 8, forms a cylinder 12 of fixed material with slots 13 in the form of projections water hammer 5.

In the lower aqueduct 10, the well 9 is deepened to enable flushing in directions 14, then the hydraulic hammer 5 and the system are flushed with water and the time is allowed for the hardening solution to set.

After that, the hydraulic hammer 5 is lifted to the upper water seal 1. After complete curing, which is assumed to be two times the curing time of the control sample of the solution, but not less than 1.5-2.0 hours, vertically oriented slits 13 are set in the well

geometric dimensions.

Then seal the well 9

a lid 13 and inject a solution at a pressure of 115-120% of c. values of rock pressure taking into account the existing hydrostatic pressure. Hydraulic fracturing is carried out in directions 16 through slits 13 while filling the fracture 17 of the fracture with hardening solution (for example, based on carbamide resins with an acid hardener.) and impregnation of near-fissure rock mass 18.

The cracks received from several wells, closing, form a waterproof screen around the contour of the future rock block in the sand aquifer.

The use of the proposed method allows to reduce the number of technological operations and reduce the time required to construct a well for hydraulic fracturing in the map

rocks and, consequently, simplify technology,

As a result of the reduction of technological operations, the total labor cost of creating a water shield around the mountain is reduced; Botok in malosv rocks.

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Claims (1)

METHOD FOR CONSTRUCTING A WATERPROOF SCREEN AROUND MINING WORKS, including drilling holes and protecting them from collapse with a hardening solution, the formation of diametrically opposite slots along the forming wells and hydraulic fracturing: the rocks are injected into the obtained cavity of the hardening solution until the cracks close to form, forming a contour around the working hole with the fact that, in order to simplify the technology, the sinking of wells and the formation of diametrically opposite slots are performed simultaneously, while protecting the well caving in from solution hardening produce its introduction into the surrounding wellbore burly array and fracturing rocks is carried out after curing, solidifying the solution into the formation. Fig!