SU964169A1 - Method and apparatus for mounting roof bolting - Google Patents

Description

The invention relates to mining, and specifically to methods of erecting an anchor lining in treatment and preparatory workings while reinforcing layered rocks.

A known method of installing anchor supports, including the introduction into the well of ampoules of resin, hardener and expandable polyurethane. With the introduction of the anchor, the resin and hardener are mixed and fixed [1 J.

However, for high-quality mixing of the resin with the hardener, it is necessary using a special device to rotate the anchor, while the resin is mixed with polyurethane, which leads to a decrease in the quality of anchor fixing.

Closest to the proposed technical essence and the achieved result is a method of erecting an anchor support, including drilling a well, introducing c. her injection pipe, injection into the well of cement mortar with simultaneous Ί withdrawal of the injection pipe and the installation of the anchor rod f 2].

A device for implementing the method includes an injection pipe;

⁵ capacity for cement mortar and connecting sleeves G 3

However, with this method, due to the specific properties of cement mortars of ₁₀ mortars, the anchor fixing process is long, during which roof rocks and production sides can collapse, and the anchor fixing strength is not high enough to install them directly in the mine bottom in case of drilling and blasting.

The purpose of the invention is to increase the technical and economic indicators of securing the mine to ensure the possibility of erecting lining directly in the face.

E 964169 4

This goal is achieved by the fact that a chemical resin solution is additionally injected into the well, alternating with the injection of cement mortar _{t, the} cement solution being injected last, the device for implementing the proposed method is equipped with additional containers for resin and hardener, and the injection pipe is additional internally »coaxially placed pipe that communicates with containers for resin and hardener, while the additional pipe is shorter than the injection one, and the connecting sleeves are equipped with a reverse 15 valves.

In FIG. 1 shows a diagram of a device for implementing the method; in FIG. 2 - injection pipe, section; in FIG. 3 ”anchor fixed by the proposed method.

The device for erecting the anchor support consists of an injection pipe 1, connecting arms 2 with check valves 3, containers for cement mortar 25 and containers for chemical mortar 5 and 6. Injection pipe 1 communicates with capacity 4 and has a coaxially located inner pipe 7 ”communicating through ed mixer 8 with tanks 5 and 6 ί The end of the inner pipe 7 is shorter than the injection pipe 1. Tanks 4-6 are hermetically closed and connected to the pneumatic line 9 through control valves 10 and 11. ₃₅

The method of construction of anchor support is as follows.

Tank 4 is filled with cement mortar, and tanks 5 and 6 with resin and hardener. From the tank 4 with cement: ₄₀ mortar fill the cavity of the injection pipe 1 and enter it to the entire depth of the pre-drilled well. Then, from the tanks 5 and 6 through the mixer 8 and the inner tube ₄₅ 7 HA gnetayut chemical solution 12 in an amount necessary to secure the anchor. The flow rate of the solution is determined by the exit from the well of the injection pipe. The rest of the borehole is filled with cement mortar 13 _m from the vessel 4. If necessary, the injection of cement slurry 13 is alternated with the injection of the chemical solution 12, however, the wellhead is filled with grout 13, because the resin is toxic and its contact with the mine atmosphere is undesirable. After filling the well with solutions, an anchor rod 14 with a plug 15 and a washer 16 is introduced into it.

The main advantage of the invention is the ability to control the time and strength of fixing the anchor by dosing the hardener.

The injection of cement mortar at the wellhead allows isolating the chemical solution from contact with the atmosphere and avoiding its pollution.

Claims (3)

(5) THE METHOD OF CONSTRUCTION OF ANCHOR TREE AND DEVICE f3o6peTeHHe relates to mining, specifically to the methods of erection of anchor lining in clearing and preparatory workings with the strengthening of layered rocks. There is a method of installing anchor lining, including the introduction into the well of ampoules of resin, hardener and foaming polyurethane. When introducing the anchor, the resin and hardener mix and fix it. 1 1 However, for high-quality mixing of the resin with the hardener, it is necessary to rotate the anchor using a special device, and the resin is mixed with polyurethane, which leads to a decrease in the anchoring quality. and the achieved result is a method of erection of anchor lining, including drilling a well, introducing into it an injection pipe, an injection, into the well FOR ITS IMPLEMENTATION of cement about solution with simultaneous I removal of an injection pipe and installation of an anchor bar 2. A device for carrying out the method includes an injection tube and a container for cement pactBopa and connection sleeves C3}. However, with this method, due to the specific properties of cement mortars, the process of securing the anchor is long, during which the roof rocks and the sides of the excavation may collapse, and the anchors' fastening strength is not high enough to be installed directly at the bottom of the mine in case of drilling and blasting . The purpose of the invention is to improve the technical and economic indicators of the fastening of the excavation to ensure the possibility of the construction of lining directly in the face. The goal is achieved by additionally pumping a chemical resin solution into the well, the cement solution being injected with a cement mortar injection, the latter being pumped with an additional tank for the resin and hardener, and an injection to the pipe with an additional internal coaxially placed one. the tube communicating with the resin and hardener tanks, the additional tube being shorter than the injection tube, and the connecting sleeves are provided with inverse valves. FIG. 1 shows a diagram of an apparatus for carrying out the method; in fig. 2 - injection tube, incision; in fig. 3 anchor secured by the proposed method. The anchoring device consists of an injection pipe 1, connecting sleeves 2 with backflow valves 3, a container for cement slurry i and tanks for chemical solution 5 and 6. The injection pipe 1 communicates with the container 4 and has a coaxially arranged internal pipe 7 that communicates through the mixer 8 with containers 5 and 6j The end of the inner pipe 7 is shorter than the injection pipe t. The tanks-6 are hermetically sealed and connected to the pneumatic assembly 9 through the control valves 10 and 11. The method of erection of anchor supports is as follows. The container C is filled with cement mortar, and the containers 5 and 6 with resin and an oT fan. From the container k, the cement i solution fills the cavity of the injection pipe 1 and introduces it to the entire depth of the previously drilled well. Then from tanks 5 and 6 through the mixer 8. And the inner pipe 7, chemical solution 12 is injected in an amount necessary to secure the anchor. The flow rate of the solution is determined by the exit from the well of the injection pipe. The rest of the well is filled with cement mortar 13 from the tank. If necessary, the injection of cement solution 13 alternates with the injection of chemical solution 12, however, the wellhead is filled with cement solution 13, since the resin is toxic and its contact with the mine atmosphere is undesirable. After filling the well with solutions, an anchor rod U with a plug 15 and a washer 16 is introduced into it. The main advantage of the invention is the possibility of adjusting the time and strength of the anchor fixing by dosing the hardener. The injection of cement mortar at the wellhead allows the chemical solution to be isolated from contact with the atmosphere and to avoid its contamination. Claim 1; A method of erection of anchor supports, including drilling a well, introducing an injection pipe into it, injecting cement mortar into the well with simultaneous removal of an injection pipe, and installing an anchor rod, characterized in that, in order to improve the technical and economic indicators of the production development, the resin solution, the series with the injection of cement mortar, with; the cement mortar is pumped last. 2. A device for anchoring, including an injection pipe, a container for cement mortar and connecting hoses, characterized in that it is provided with additional tanks for resin and hardener, and the injection pipe with an additional internal coaxially placed pipe that communicates with the containers for resin and hardener, with additional pipe shorter injection, and the connecting sleeves are equipped with check valves. Sources of information taken into account in the examination 1. German Patent Vf, cl. E 21 D 21/00, published. 1977. 2. Roginsky V.M. The use of reinforced concrete lining. M., Tsvetmetinformatsi, 19b7, p. 17-23 (prototype). 3. US patent tf. cl. 61-35, published. 1970. Fig., 1 ffoSf f CfKam to 6309 Figg Fig.Z