摘要:
A method for providing a rock bolt (2) for rock bolting, wherein a rock bolt (2) having a tubular bolt portion (4) with a closed cross section is inserted and expanded for bearing contact in a bore hole (3) in a rock structure (1). The length of the tubular bolt portion (4) is determined such that maximum frictional force at pulling inside a bore hole (3) of a rock bolt with a tubular bolt portion with this length is below a predetermined maximum value. The invention also concerns a rock bolt.
摘要:
The present invention is related to a rock bolt (7), expandable by means of a pressure media, for insertion into a borehole. The expandable bolt (7) comprises a connection unit (8) with means (11) for detachable interaction with an expansion means (10) for expansion of the rock bolt (7), as well as with a suspension element (16). The connection unit is designed with such external dimensions so that it may be inserted into the bore-hole. The invention also relates to such a rock bolting system.
摘要:
Coupling sleeve for connecting a threaded rock bolt (1) to an impact rock drilling machine (2) comprising a first part (3) provided with an internal thread (4) for connection of the rock bolt (1) and a second part (5) provided with an internal thread (6) for connection of the rock drilling machine (2), whereby the second part (5) comprises a transversely to a longitudinal axis (9) on the coupling sleeve arranged locking device (7) which cooperates with a region (8) on the rock drilling machine (2) for preventing that the coupling sleeve and the rock drilling machine (2) are separated.
摘要:
Antivirally active compounds of formula (I), wherein R.sup.1 is hydrogen, hydroxy, mercapto or amino; R.sup.2 is hydrogen, hydroxy, fluoro, chloro or amino; R.sup.3 and R.sup.4 are independently selected from (II), (III), amino, hydroxy or an ether or ester residue thereof, or R.sup.3 together with R.sup.4 is (IV), wherein M is hydrogen or a pharmaceutically acceptable counterion; and n is 1 or 2; with the proviso that, when R.sup.2 is amino and R.sup.3 and R.sup.4 are hydroxy, R.sup.1 is not hydroxy and in addition, when n=1, R.sup.1 is not hydrogen, and pharmaceutically acceptable salts thereof; processes for preparation of said compounds, a pharmaceutical composition comprising said compounds, methods for treatments of virus infections as well as use of compounds of formula (I) without the proviso for the manufacture of a medicament for treatment of AIDS. ##STR1##
摘要:
A device (5) for installing a pressure fluid expandable rock bolt (4) of the kind having a tubular expansion portion and a fitting portion, said device at a distal portion having chuck means for gripping the fitting portion and for establishing a sealed connection between a fluid source and the inlet, said device extending essentially in an axial direction. The device includes at a proximal portion a holder portion (11) that is adapted to be fitted to a drill string engagement element (27) of a rock drilling machine. The invention also concerns a method and a rig.
摘要:
A system for monitoring and documenting the installation of at least one rock reinforcement bolt in a tunnel or a mine, wherein bolt installation related information is stored and related to the identity of the bolt is distinguished by means (S1, S2, S3, 4) for registering of at least one bolt installation related parameter and means for storing the corresponding installation parameter data in a related memory (M), and means (S4, 4) for registering the installation position and means for storing the corresponding installation position data in a related memory (M). The invention also concerns a method.
摘要:
In a method and a device for installing, in a rock wall or roof, a self-drilling expandable rock bolt (2) having a drill bit portion (5), an expansion portion (9) and a connecting portion (10), in a rock breaking step, the self-drilling rock bolt (2) is provided with a rock breaking movement and flushing fluid for producing a bore hole, and in an expansion step, pressurized expansion fluid is introduced into the expansion portion (9) in order to expand it so as to be fixed to the inside of the bore hole. Expansion fluid is introduced by means of a swiveling device (6) so that the rock bolt (2) is free to move during the rock breaking step, and be tightened against the rock bolt (2) in the expansion step in such a way that a sealed channel for expansion fluid is established between an expansion fluid source and the expansion portion (9). The invention also concerns a self-drilling rock bolt.
摘要:
Method and device for rock bolting, wherein a tubular bolt (2) with closed cross-section is inserted and expanded for anchoring inside a bore hole (12), wherein the tubular bolt is expanded to contact in the inner portion of the bore hole, a tension element (3, 7, 8, 9) which is arranged in the outer portion of the bore hole with an inner part (7) attached to the tubular bolt (2) is pre-stressed and a settable medium is injected into the outer portion of the bore hole (14) between (27) the tension element and the wall of the bore hole and is allowed to set.
摘要:
Use of a compound of the formula wherein Base is thymine, Cytosine, adenine or guanine, or a physiologically acceptable salt thereof, for therapeutic or prophylactic control or treatment of retrovirus infections, including HIV, and hepatitis B virus infections and to a method for such treatment, especially for AIDS.
摘要:
Device for rock bolting with an adapter device (10) for connection of a drilling machine (3) to a self drilling rock bolt (7), said adapter device including an adapter element (14) which is sealingly surrounded by a swivel sleeve (13) for connection to (one) external (source) sources for flushing medium (8) and bolt grouting medium (9), wherein the adapter element includes a thread for connecting to a corresponding thread on the rock bolt (7), and an integral connection portion for connection to the drilling machine (3). The invention also concerns a device for automatized rock bolting and a method for rock bolting.