Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent
1975-11-21
1977-05-17
Purser, Ernest R.
Mining or in situ disintegration of hard material
Automatic control; signaling or indicating
Of hard material disintegrating machine
299 75, E21D 910
Patent
active
040238610
ABSTRACT:
The range of movement by a winning tool of a tunneling machine is controlled to release material from a heading wall to form a tunnel having a desired profile. The tunneling machine carries gyroscope detectors and a detector for a laser beam which is projected along a desired tunnel heading. Such detectors provide electrical signals corresponding to a position change of the tunneling machine. Position transducers, coupled with counters, provide electrical signals corresponding to perpendicular position coordinates of the winning tool with respect to the tunneling machine. Means, including a computer, receive these electrical signals and continuously compute a limit coordinate signal based on a desired tunnel profile provided by a computer program. The limit coordinate signal corresponds to a measure of the distance, at the heading face of the tunnel, lying perpendicularly between the course of displacement by the winning tool and a required point on the track of movement by the winning tool to cut the heading face at a tangent to the desired profile of the tunnel. Servo valves for the fluid actuators used to position the winning tool are responsive to the limit coordinate signal which is continuously compared with the measured coordinate signal to prevent movement of the winning tool beyond the desired profile of the tunnel. The winning tool follows a course of travel which is either linear or parallel to the desired tunnel cross section.
REFERENCES:
patent: 3321248 (1967-05-01), Williamson et al.
patent: 3482103 (1969-12-01), Martinsen
patent: 3517966 (1970-06-01), Montacie
patent: 3560753 (1971-02-01), Beug et al.
Gebr. Eickhoff Maschinenfabrik und Eisengiesserei m.b.H.
Purser Ernest R.
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