SU1758232A1 - Method of consolidating rocks in vertical shaft sinking - Google Patents

Abstract

Use: in the construction of vertical mine workings in damaged rocks in the mining, coal and other areas of the industry. The essence of the invention is to fix the walls of the mine by drilling horizontal wells and injecting a tampon solution into them. At the same time, each subsequent section is drilled after setting the solution, which holds the rock of the previous section. Injection is carried out at each well site until a solution appears at the bottomhole, b il.

Description

The invention relates to mining, in particular to the sinking and fastening of shafts and can be used in the construction of vertical mine workings in the mining, coal and other areas of the industry.

There is a known method of freezing rocks when sinking shafts, including the creation of reinforcement zones by drilling wells, installing special freezing columns for local freezing and supplying coolant to the columns from the freezing station through pipes. In order to reduce the cost of freezing, it is envisaged to push the water with a higher temperature through the wells with cold water in cracks and cavities.

The disadvantages of this method are the inefficient operation and cumbersome structures of special freezing units.

columns, as well as the complexity of drilling in damaged rocks.

There is also known a method for fixing broken rocks by plugging from the surface, including the drilling of tamper wells and the injection of a fastening solution.

The disadvantages of the method are the difficulty of drilling wells in the damaged rocks, a significant excessive amount of work while strengthening the local zone located only in a certain area of the trunk and, as a consequence, an increase in the cost and complexity of the work.

Closest to the present invention is a method of strengthening rocks from the bore of the trunk with a plugging.

The known method involves the device concrete cement pad in the bottom of the trunk. Thereafter, inclined cement wells are drilled in Stockholm

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Place the bottom at an angle to the installed support and inject a bonding solution into them before forming a reinforcement zone around the perimeter.

The disadvantage of this method is the large amount of cementing works in the destroyed rocks. In addition, the complexity of the work is significantly influenced by the need to install cement pads, the impossibility of drilling wells in damaged rocks, re-drilling of cement stones in previously drilled wells.

The aim of the invention is to shorten the fastening time.

This goal is achieved in that, according to the method of securing the rocks, when drilling a vertical well, including drilling cement wells, injecting a bonding solution into the surrounding rock mass and securing the depth of fixation, in which the drilling of cement wells perform horizontal drilling, each subsequent section is drilled after setting the solution, which holds the rock of the previous section, and the control of the depth of fixation is carried out by measuring the depths of the impact wells, and failure of the solution at each well site is made up to the bottom hole,

Fig. 1 shows the phase of drilling a horizontal well; Fig. 2 shows the phase of injection of the cement slurry prior to its appearance at the bottomhole; FIG. 3 shows the drilling phase of a subsequent well after the formation of the first annular zone; 4 shows the formation phase of the next annular zone; 5 - the same, before fixing the walls to the height of the penetration; figure 6 - the phase of penetration of the trunk in the fixed rock.

The essence of the proposed method is as follows.

In the bottomhole 1 (Fig. 1) of the trunk 2 of the vertical mine workings, which was passed earlier, along the entire perimeter at a distance of 3 (equal to 0.8-1.0 m for the convenience of drilling the drifts), horizontally drilled well 4 to a depth of 5, t. e. until a drill tool (not shown) reaches the destroyed rock 6.

Through the drilled wells 4, the bonding breast-pumping solution 7 is injected in section 8 (Fig. 2) until this solution 9 is released at the bottom of hole 1 of the barrel 2.

The injection is carried out at a spontaneously established pressure Pi. due to the resistance of the downstream communications (not shown). Drilling wells 4 are on the perimeter of the barrel 2.

As a result of the work performed, an annular closed zone 1 of fortified rocks 10 is obtained. After the mortar fixing the rock is set, along the annular zone i, horizontal wells are drilled to a depth of 12 through previously drilled squares 4 (phi-Z).

After the drilling of wells 11, a bonding cementing

solution 7 in section 13 (FIG. 4) under the pressure P2 PI until this solution exits 14 into the bottomhole 1 of stem 2. As a result of the work performed, a closed annular zone II (FIG. 4) and (FIG. 5) reinforced rocks are obtained.

Then, all the above operations are respectively repeated until the formation of zone III and so on, until the destroyed rocks are fixed by the amount of entry H (Fig. B). After all the work done, it is possible to ensure the stability of the rock walls 15, for example, in zone III. for the development of the slab 1 in the next entry H of the trunk 2.

Then the cycle of work is repeated to penetrate the vertical shaft of the next stop to the required depth. The control of the fixing depth on the value of the inlet N is made by measuring the depth of drilling of horizontal cement wells.

on fixed psrod.

Thus, the proposed method allows to ensure the stability of the rock walls and at the same time to shorten the time of their fixing when drilling vertical

the trunk.

Claims (1)

Claims of the method of securing the rocks during the penetration of a vertical wellbore, including the drilling of cement wells, the injection of a fastening solution into the surrounding rock mass, and the control of the fixing depth, characterized in that each subsequent section is drilled after setting the mortar, which holds the rock in the previous section, and by measuring the depth of the cement wells, and the injection of the solution in each section of the wells is made before its appearance in the bottomhole. Fig.Z Fi $ L Fig.Z % / g Ј