Abrégé

A mine roof support system includes an elongated anchor rod or tendon having a rigid non-deformable distalmost anchoring end portion, and one or more axially deformable portions which are configured to deform in the event load forces exceed a threshold force approximating the forces during a rock burst or rock dilation event. The rigid anchoring portion is provided with primary anchor members such as ribs, grooves, studs and the like. The primary anchor members are configured to reduce bar plasticity, and fixedly secure and retain the rigid portion in place in a drill hole. In the event rock forces exceed the threshold force, the plastically deformable portions elongate with the dilating rock to accommodate and absorb the rock forces.

Classes IPC  ?

• E21D 21/02 - Boulons d'ancrage pour la protection du toit, de la sole ou du revêtement des puits ayant des moyens pour indiquer la tension
• E21D 20/02 - Mise en place des boulons d'ancrage avec dispositions pour le scellement
• F16B 13/14 - Manchons ou chevilles non métalliquesUtilisation d'un matériau liquide, semi-solide ou malléable à cet effet
• E21D 21/00 - Boulons d'ancrage pour la protection du toit, de la sole ou du revêtement des puits

Abrégé

A mine roof support assembly for anchoring in a bore hole by means of a resin, cementitious grout which includes an elongated reinforcing tendon which extends from a proximal end portion to a distal end portion. A slip sheath formed from a heat shrunk plastic, is secured by heat shrinkage radially about the tendon. The sheath is mechanically coupled to the tendon so as to allow the desired axial sliding of the tendon relative to the sheath on the application of predetermined forces which sufficient to effect any desired yielding movement of the tendon in the bore hole. An anti-bonding agent or coating and/or anticorrosive may be interposed between the sheath and the tendon, whereby the sheath substantially encapsulates and limits the admixing of the interposed anti-bonding agent/anti-corrosive coating with the resin.

Classes IPC  ?

• E21D 21/00 - Boulons d'ancrage pour la protection du toit, de la sole ou du revêtement des puits

Abrégé

An apparatus for positioning a reinforcing tendon into a drill hole formed rock face including a body portion having a bore extending axially therethrough. The bore has a dimension selected to allow limited sliding movement of the tendon therethrough and includes a portion which tapers inwardly from a forward outfeed end towards a rearward or infeed end. A wedging member is movably provided in the bore. Movement of the wedging member towards the rearward end of the body results in its frictional engagement with the tendon to restrict its withdrawal from the body relative to the infeed end, whereas movement of the wedging member relative to the bore towards the outfeed end results in its disengagement from the tendon allowing it to be repositioned forwardly relative to the body. A drive is further provided to reciprocally move the body relative to the rock face.

Classes IPC  ?

• E21D 20/00 - Mise en place des boulons d'ancrage