SU1352072A1 - Method and apparatus for providing a roof bolt - Google Patents

Abstract

The invention relates to the fastening of preparatory and treatment workings. The goal is to simplify the construction of the anchor. The device includes an injector 1, a piston 2 and a capsule / K / 3 mounted on the piston 2 with the possibility of disconnecting the fixing composition into the well 4 of the fixing composition. Inside K 3 there is a flexible fitting 6, one end 7 of which is rigidly attached to the bottom K 3 and the other End 8 - to the end of the piston 2. Before inserting the anchor into the well 4, the reinforcement 6 is folded into the capsule 3. At the end of the injector 1, put the piston 2 with K 3, enter the drilled well 4 and inject the anchoring compound. The pressure of the piston 2 with one end 8 of the valve 6 is squeezed out of K 3 ,. Unfolding, the end 8 of the reinforcement 6 overlaps the cross-section of the well 4, which ensures its sealing during the injection process. As the well 4 is filled with a fixative composition, reinforcement is simultaneously reinforced with reinforcement 6, which stretches along well 4 from its bottom to the wellhead. In highly fractured rocks, re-injection is performed at a pressure greater than the original. 2 sec. and 1 z. p. f-ly, 4 ill. i (L so e l GhE O GhE da.d.1

Description

The invention relates to the fastening of preparatory and clearing workings, and in particular to methods and means of erecting an anchor with fastening in concrete compositions.

The aim of the invention is to simplify the construction technology of the anchor.

FIG. Figure 1 shows the construction of the anchor, the position of the core with the capsule before the start of injection of the fixative composition into the well; in fig. 2 shows the position of the powder and the capsule during the injection; in fig. 3 - view of the anchor after its installation; in fig. 4 is a diagram of rock consolidation around the well with additional pressure.

The device for erection of the anchor consists of the injector 1 inserted into the piston 2 and the capsule 3 mounted on the injector 2 with the possibility of being disconnected during injection into the borehole 4 and secured with the reinforcing structure 5. Inside the capsule 3 there is a folded flexible fitting 6, one The end 7 of which is rigidly attached to the bottom of the capsule 3, and the other end 8 to the end of the piston 2. To prevent the composition from the well 4 from escaping, after removing the injector 1, a valve 9 serves, which locks the hole in the piston 2 under the pressure of the pin of fixing composition 5 (Fig. 3). Capsule 3 has locks 10 for retaining it in well 4, and injector 1 has a support table 11.

The method of construction of the anchor is as follows.

Before inserting the anchor into the well 4, the flexible reinforcement 6 is pre-folded and placed in this form in the capsule 3 installed on the core 2. Then the piston 2 with the capsule 3 is put on the end of the injector 1. The position of the piston 2 on the injector 1 is fixed by the support table 11. The piston 2 installed on the injector 1 with the capsule 3 is inserted into the drilled well 4 and the valve is filled with a pressure fluid 5. The injection pressure of the piston 8 is squeezed out of the capsule 3 and

-chimo, overlaps the cross section of the well

five

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0

five

4, which ensures its sealing during the injection process. As the well is filled, the fixing m of compound 5 is simultaneously reinforced with flexible reinforcement 6, which stretches along the well from its bottom to the mouth. In a highly fissured rock mass, an additional injection is carried out at a pressure greater than the initial one. The composition penetrates into the cracks 12, and, cured, monoliths the rocks around the well (Fig. 4), while the thickness 2, the position of which is fixed by the flexible fitting 6 extended along the well, provides sealing of the well.

The magnitude of the overpressure is established depending on the fracturing of the rocks and the viscosity of the anchoring composition. It is preferable to use single-phase liquids (resins) having high penetrating power.

Claims (3)

1. A method of erecting an anchor, including drilling a well, sealing its mouth and injecting a fixative composition with simultaneous installation of flexible anchor reinforcement along the well length, characterized in that, in order to simplify the anchor technology, it is flexible, the reinforcement is pre-folded, and is introduced into the well and then stretched along the well in the direction from its bottom to the mouth. 2. A method according to claim 1, characterized in that, in order to strengthen the fractured rocks around the well, after the completion of injection into the well, the fixing composition is re-injected at a pressure higher than the original. 3. A device for erecting an anchor, including an injector and a piston, to the end of which an anchor reinforcement is attached at one end, characterized in that the device is equipped with a capsule mounted on the shaft and can be detached during injection into the well of fixing composition, while the free end of flexible reinforcement attached to the bottom of the capsule. k ig 1 Compiled by B. Usan-Podgornov Tehred I. VeresKorrektor I. Erdeyi Circulation - 453 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Design. four Editor T. Lazorenko Order 5262/28