Abstract:
Die Erfindung betrifft ein Verfahren zum Abbau von Gesteinsmaterial unter Tage unter Ausbildung einer Herrichtungs- oder Abbaustrecke und eine dazu vorgesehene Vollschnittmaschine mit einem rotierend angetriebenen Schneidkopf, dessen Bohrdurchmesser den Durchmesser der Herrichtungs- oder Abbaustrecke vorgibt. Nach der Erfindung ist vorgesehen, dass mittels der Vollschnittmaschine in einer ersten Vortriebsrichtung eine erste Herrichtungs- oder Abbaustrecke ausgehend von einer ersten Hauptstrecke zu einer zweiten Hauptstrecke aufgefahren und gebildet wird, dass die Vollschnittmaschine in der zweiten Hauptstrecke umgesetzt wird und dass ausgehend von der zweiten Hauptstrecke mittels der Vollschnittmaschine in einer zweiten Vortriebsrichtung, welche der ersten Vortriebsrichtung im Wesentlichen entgegengesetzt ist, zu der zweiten Hauptstrecke eine zweite Herrichtungs- oder Abbaustrecke vorangetrieben und gebildet wird, welche in einem Abstand längs der ersten Hauptstrecke verläuft.
Abstract:
A ripper tool (52) for a tunnel boring machine (TBM) (50) includes a tool body (150) and a plurality of cutting element inserts (155). The tool body (150) has a plurality of socket cavities (157). A tool body blank (240) can be heat treated to increase the hardness of the tool body blank (240). The socket cavities (157) can be machined in the tool body blank (240) after the tool body blank (240) is heat treated. The cutting element inserts (155) are mounted to the tool body (150). The cutting element inserts (155) are respectively press fit in the socket cavities (157). The ripper tool (52) can be pivotably mounted to a cutter head (60) of the TBM (50).
Abstract:
The present disclosure relates to a tunneling apparatus including a drill head having a main body and a drive stem rotatably mounted within the main body. The main body defines a vacuum passage offset from the drive stem that extends through the main body from a proximal end to a distal end of the main body. The tunneling apparatus also includes an axial bearing structure for transferring axial load between the drive stem and the main body of the drill head. The axial bearing structure is proximally offset from the distal end of the main body of the drill head. The tunneling apparatus further includes a first radial bearing structure for transferring radial load between the drive stem and the main body of the drill head. The first radial bearing structure is positioned between the axial bearing structure and the distal end of the main body of the drill head and is distally offset from the axial bearing structure.
Abstract:
A tunnel boring machine (90) having a rotating cutter head (93) that rotatably supports a plurality of cutter assemblies (10). A plurality of instrument packages (50) are attached to the rotating cutter head, each instrument package having a distal end in contact with an associated cutter assembly. The instrument packages include a plurality of sensors including an accelerometer (32), magnetometer (33) and temperature sensor (34), for monitoring the associated cutter assembly. The sensors are mounted in a distal end of the instrument packages that is biased to remain in contact with the cutter assembly. The instrument packages include a wireless transmitter, and they are interconnected in a mesh or peer to peer network. A power supply (176) such as a battery pack is provided for each instrument package. The data from the sensors may be used to control operation of the tunnel boring machine and/or to monitor the condition of the cutter assemblies.
Abstract:
Apparatus (2) for supporting injected wet concrete (4) during the formation of a concrete tunnel (6), the apparatus (2) comprising a tube (8) and a plurality of ring members (10) positioned inside the tube (8), and the apparatus (2) being such that in use the wet concrete (4) is injected around the outside of the tube (8) and is supported by the tube (8) until the wet concrete (4) dries and becomes self-supporting, the ring members (10) prevent the tube (8) collapsing inwardly due to external pressure, the tube (8) is formed by a plurality of elongate members (12) which extend longitudinally and which are arranged side by side in a circle, the ring members (10) extend transversely across the tube (8), and the elongate members (12) are flexible and movable relative to one another thereby enabling the tube (8) to bend and allow the concrete tunnel (6) to be formed with curves.