SU1446326A1 - Method of consolidating rock with bolts - Google Patents

Abstract

The invention relates to the mining industry. The goal is to simplify the technology and increase the quality of fixation by simultaneously monolithing anchors and host rocks. In the fractured rocks, wells are drilled into which tubular perforated anchors are inserted. A loose inert aggregate (sand) is first blown through the holes in the anchors, and then a penetrating fixing solution (a hardening solution based on synthetic resins) is injected under pressure. Flowing through the aggregate, hardening the solution penetrates under the pressure of the injection into the cracks of the array, hardens and monoliths it. The filler prevents the shrinkage of the solution and increases the frictional adhesion of the anchor to the wall of the well. 1 hp f-ly, 3 pp. i (o

Description

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at an angle of 85 in accordance with the bedding. When the ore is released, the specks are destroyed by cracks. To fix them in the area of the visor, a well is drilled with a depth of 2.0–2.2 (40 mm in diameter). A tubular anchor with a diameter of 30 mm with perforated walls is inserted into each well. Having wedged the anchor and not tightening the hermetic (for air outlet), dry quartz sand is forced through the anchor holes into the gap between its scrap and the borehole walls. For this, a PA-3 sandblasting machine is used. After filling the gap, tighten the sealer with a nut with an applied washer. Then, through the high pressure hose and the central channel of the anchor, a hardening polymer solution based on carbamide

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The invention relates to the mining industry, in particular to methods of fixing fractured rock with the help of anchors during underground and open cast mining.

The purpose of the invention is to simplify the technology and improve the quality of fixation by simultaneously monotonizing anchors and host rocks.

FIG. 1 shows the installation of the anchor in the well; in fig. 2 shows the step of injecting the dry component; in fig. 3 shows the step of injecting the liquid component.

The method is carried out as follows.

In fractured rocks, preferably across the strike, a borehole 1 is drilled, a tubular perforated anchor 2 is inserted into it, having a wedge 3, a washer 4, a clamping nut 5, a sealer 6 and channels 7 in the anchor body (Fig. 1). Scoring the anchor 2 on the wedge 3 and not pressing the nut 5 with the sealer 6, the dry abrasive aggregate 8 (sand) is blown through the holes 7 with, for example, a sandblasting nozzle 9 into the gap 10 between the anchor 2 and the walls of the well 1. Then the nut 5 and the washer 4 are compressed the sealer 6 and, under pressure, pump the liquid component 11 of the fixing solution through the openings 7 of the anchor — which easily penetrates into the gnawing solution, for example, a hardening solution based on synthetic resins with a density of 1.19-1.22 t / m. The lower limit is taken from the conditions of the least shrinkage of the polymer during curing, and the upper limit by the Q power of anchors, including drilling, is penetrating, taking into account the natural density of synthetic resins (for example, for carbamide resins, it corresponds to 1.22-1.27 tons / m). The leakage through the filler 8, into the holding 11, penetrates with a pop pressure of injection into the cracks of the 12th massif, hardens and monoliths it (f g.C). The aggregate (sand) prevents the shrinkage of the solution, increases the frictional friction of the anchor with the walls of the well.

Example. In the area of the overhead visors of the openings30

Urea resin grade KF-MT with a density of 1.19-1.22 t / m Hardener - (8-10% aqueous solution of oxalic acid Water

100

10-36 Up to 10% of weight is bamid

35

Pressure 25 MPa.

pumping

resin por

five

50

Claims (1)

Claim 1. Method of fastening rocks with wells and supplying them with dry and then liquid components fixing the solution and securing the anchors in the tanks during the curing of the solution, characterized in that, in order to simplify the technology and improve the quality of the fixation by simultaneously homonolating the anchors and host rocks, it is dry the component is injected into the well with an inert aggregate, and as a liquid component, an easily penetrating fixing solution, while under the components of the fixing solution at an angle of 85 in accordance with the bedding. When ore is released, the visors are destroyed along the cracks. To fix them in the area of the visor, a well is drilled with a depth (exceeding its thickness by 0.5-0.75 m) 2.0-2.25 m with a diameter of 40 mm. In each well lay a tubular anchor with a diameter of 30 mm with perforated walls. Having wedged the anchor and not tightening the sealer (for air outlet), dry quartz sand is injected through the holes of the anchor into the gap between its thaw and the walls of the well. For this, a PA-3 sandblasting machine is used. After filling the gap, tighten the sealer with a nut with a washer. Then, through the high-pressure hose and the central channel of the anchor, a hardening polymer solution based on carbamide is injected the power of anchors including drilling the power of anchors including drilling Urea resin grade KF-MT with a density of 1.19-1.22 t / m Hardener - (8-10% aqueous solution of oxalic acid Water 100 10-36 Up to 10% of the weight of the urea the power of anchors including drilling Pressure 25 MPa. pumping resin por the power of anchors including drilling Claims 1. Method of anchoring rocks using anchors, including drilling wells and supplying them with dry and then liquid components of the fixing solution and securing the anchors in the wells during the curing of the solution, characterized in that, in order to simplify the technology and improve the quality of the fixation by simultaneous homonification of the anchors and surrounding rocks, the dry component is fed into an inert aggregate well, and as a liquid component an easily penetrating fixing solution, while supplying fixing components kak and deliveries make the fixer produced through pre Kie fissured quartzite on the proposed method. Visor height 4 m, i thickness 1.5 m, jiMpHHa 2.0 m. The main mass of thin cracks has a fall a tubular perforated anchor installed in the well. 2, the method according to claim 1, characterized in that a tubular perforated anchor installed in the well. 2, the method according to claim 1, characterized in that as 1446326 the inert filler is used as a fixing solution - hardening sand, and as an easily penetrating solution based on synthetic pitches Y / AY / y y f / / / y . 10 77 air tumbling / Phi2.1 . rT-j / FIG. 2 Fig.Z