SU977789A1 - Method for plugging rocks - Google Patents

Description

(St) METHOD OF DAMPING OF MOUNTAIN BREEDS

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FIELD: mining operations with plugging of rocks.

There is a known method of plugging mountainous waterways by drilling wells and injecting cementing solutions Ij into them.

The disadvantage of this method is that when plugging the ropHoi massif it is not always possible to achieve high-quality carburization in one step, and connection with which we often have to re-drill the cemented wells and carry out cement work. In addition, it is necessary to drill a large number of wells to open all cracks in the plugging zone.

The closest in technical essence and the achieved result to the proposed method is to include the opening of cracks in the rock of the borehole, the formation of hydraulic fracturing of the rock and the injection of the cement slurry 2 into the cracks through the wells.

The disadvantage of the known Method is the necessity of drilling a large number of wells to open all cracks in the plugging zone due to the fracture of the array along one of the existing cracks, rather than the formation of new cracks.

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The purpose of the invention is to increase the area of the plug.

This goal is achieved by the fact that according to the plugging method, including the opening of cracks in the rock of a borehole, the formation of cracks by hydraulic fracturing and the injection of cracks in the cracks through the well, in the zone of an impermeable array opened by the well.

Claims (2)

The drawing shows a diagram of the plugging of rocks. 3 The diagram shows a well 1, cracks 2 opened by it, guiding slots 3, hydraulic fracture crack 4, opening cracks 5. By way of crack 6, opening cracks 7 The method is implemented as follows. The cement hole 1 is drilled to determine the absorption capacity of the rock mass. Along the length of the borehole 1, impermeable and permeable areas are revealed that reveal the natural fractures of the 2nd massif. The cracks 2 opened by the well are plugged in a known manner. After completion of the injection of the solution into the well 1, it is washed, the drill bit (chisel, crown) is replaced with a special device and with it in the impermeable parts of the well at intervals and along the perimeter wells cut slits 3 depth approximately equal to the radius of the well. At that, one cut-out slot is isolated from the two sides of the packerM and at the same time the hydraulic fracture of the massif is formed with the formation of an artificial crack of the gap 4 and filling it and opened cracks 5 with the same cement slurry. S fracturing process. An artificial crack 4, which develops, intersects cracks compacted by cementing stretch 2, reaches natural cracks 5. 3 further, the opened fractures occur 5 The next fracture is produced in another interval, the artificial fracture 6 of the fracture intersects the cracks sealed with a cement slurry 2 and 5 and opens the natural cracks. After the interval, all the planned fractures and filling of the opened natural cracks are made, the well under pressure is filled with a pressure gauge. create. 9 The use of the proposed method of plugging rocks allows for the qualitative creation of both impervious curtains and reinforced zone of the mountain massif around the constructed workings through the minimum possible number of wells. So, if the known methods for the construction of vertical shafts of mines with a diameter of 6-8 m provide for drilling 7-9 wells for. plugging, the proposed method allows for tamping in the same conditions through a single well. By performing in the method of fracturing in the impenetrable part of the array, plugging costs are reduced by a factor of 2-3. Claim 1. The method of plugging rocks, including the opening of cracks in the rock by drilling a well, cracking the fracture through a well of cement slurry wherein, in order to increase the plugging zone, fracturing is carried out in the zone of an impermeable array opened by the well. 2. Method pop.1, excluding and. due to the fact that hydraulic fracturing is performed after filling the cracks opened with the well with a cement slurry. Sources of information taken into account during the examination 1.Mankovsky G.I. Special methods for constructing shafts. M., Science, 1965, p. 168. 2. USSR author's certificate number 6k60S5, CL-E 21 D 1/16, 1972 (prototype).