Rock Anchor Bolt

Abstract

A system and method with a self-drilling chemical rock anchor bolt, specifically for use in the mining industry and a device for moving the rock anchor bolt, said rock anchor bolt comprising an anchor tube which encloses an interior, a fixation substance arranged within the interior for bonding the anchor tube on rock, a moveable piston arranged inside the interior for moving the fixation substance outside the anchor tube if the anchor tube is arranged in a borehole inside the rock, a boring head at one back end of the anchor tube, a rinsing channel to supply rinsing fluid, in particular rinsing water to the boring head, an expression channel to supply power fluid, in particular power water to the piston, is to be able to supply both rinsing water as well as power water into an interior of the rock anchor bolt with minor technical expenses.

1 . A system for a self-drilling chemical rock anchor bolt, said system comprising:
 an anchor tube which encloses an interior;   a fixation substance arranged within the interior for bonding the anchor tube on rock;   a moveable piston arranged inside the interior for moving the fixation substance outside the anchor tube when the anchor tube is arranged in a borehole the rock;   a boring head at one back end of the anchor tube;   a rinsing channel to supply rinsing fluid, in particular rinsing water to the boring head;   an expression channel to supply power fluid, in particular power water to the piston; and   a moveable closing element which is moveable between a rinsing position and a pressure position,   wherein the rinsing channel is open and the expression channel is closed in the rinsing position and the rinsing channel is closed and the expression channel is open in the pressure position.   
     
     
         2 . The system of  claim 1  wherein there is only one fluid opening for supplying both rinsing fluid as well as power fluid. 
     
     
         3 . The system of  claim 2  wherein a fluid connection between the fluid opening and the rinsing channel and no fluid connection between the fluid opening and the expression channel exists when the closing element is in rinsing position and no fluid connection between the fluid opening and the rinsing channel and a fluid connection between the fluid opening and the expression channel exists when the closing element is in pressure position. 
     
     
         4 . The system of  claim 1  wherein the closing element is moveable in the direction of a longitudinal axis of the rock anchor bolt. 
     
     
         5 . The system of  claim 1  wherein the closing element is designed as a pipe socket with an axial fluid channel and the fluid opening leads into a front end of the axial fluid channel so that both rinsing fluid as well as power fluid may be fed through the axial fluid channel of the pipe socket. 
     
     
         6 . The system of  claim 5  wherein the interior of the rock anchor bolt is divided into a back pressure space and a front rinsing space in front of the fixation substance using a separating ring with a connecting opening. 
     
     
         7 . The system of  claim 6  wherein the back pressure space is within a channel sleeve. 
     
     
         8 . The system of  claim 6  wherein the rinsing channel leads into the front rinsing space and the expression channel is separated fluid-tight from the back pressure space on the piston by using of a separating membrane. 
     
     
         9 . The system of  claim 6  wherein the separating membrane separates the expression channel on the piston fluid-tight from the back pressure space and a fluid-conducting connection exists between the back end of the axial fluid channel of the pipe socket and the front rinsing space when the pipe socket is in rinsing position. 
     
     
         10 . The system of  claim 9  wherein the pipe socket is arranged outside the connecting opening of the separating ring when the pipe socket is in rinsing position. 
     
     
         11 . The system of  claim 10  wherein the separating membrane is split when the pipe socket is in pressure position, so that a fluid-conducting connection exists between the expression channel on the piston and the back pressure space and the front rinsing space and/or the rinsing channel is separated fluid-tight from the back end of the axial fluid channel of the pipe socket. 
     
     
         12 . The system of  claim 11  wherein the pipe socket is arranged in the connecting opening of the separating ring and the radial exterior of the pipe socket rests fluid-tight on the connecting opening of the separating ring on the separating ring when the pipe socket is in pressure position, so that no fluid-conducting connection between the back pressure space and the rinsing space exists and preferably the back end of the pipe socket ends on the expression channel on the piston, so that the axial fluid channel of the pipe socket leads into the expression channel on the piston 
     
     
         13 . The system of  claim 1  wherein the rinsing channel is designed as an annulus between the fixation substance and the anchor tube. 
     
     
         14 . A self-drilling chemical rock anchor bolt comprising:
 an anchor tube which encloses an interior;   a fixation substance arranged inside the interior for bonding the anchor tube to rock;   a moveable piston arranged inside the interior for transporting the fixation substance outside the anchor tube when the anchor tube is arranged in a borehole inside the rock;   a boring head on a back end of the anchor tube,   a rinsing channel for supplying rinsing fluid, in particular water to the boring head; and   an expression channel for supplying power fluid, in particular water to the piston,   wherein the rock anchor bolt comprises one fluid opening for supplying both rinsing fluid as well as power fluid.   
     
     
         15 . The rock anchor bolt according to  claim 14  wherein the interior is divided into a back pressure space and a front rinsing space in front of the fixation substance by a separating ring with a connecting opening. 
     
     
         16 . The rock anchor bolt according to  claim 15  wherein the rinsing channel leads into the front rinsing space and the expression channel is separated fluid-tight from the back pressure space on the piston by a penetrable separating membrane. 
     
     
         17 . The rock anchor bolt according to  claim 16  wherein said membrane is made of at least one of plastic and metal. 
     
     
         18 . The rock anchor bolt according to  claim 16  wherein the rock anchor bolt comprises an anchor nut and an anchor plate supported by the anchor nut for placing on the rock. 
     
     
         19 . A device for moving a rock anchor bolt, said device comprising:
 a driving element, including a driving ring for transmitting a torque to the rock anchor bolt;   a drive shaft for connection with a drive motor; and   a mechanism for transmitting a torque from the drive shaft to the driving element,   wherein the device comprises one fluid opening for supplying both rinsing fluid as well as power fluid.   
     
     
         20 . The device according to  claim 19  wherein the device comprises a moveable pipe socket with an axial fluid channel which is moveable between a rinsing position and a pressure position and the fluid opening leads into a front end of the axial fluid channel,
 wherein the device comprises a jig piston and a lever coupled with the jig piston for moving the pipe socket, and 
 wherein the driving element comprises an axial borehole and the pipe socket is arranged within the axial borehole of the driving element as well as the pipe socket is axially moveably mounted.