Mining or in situ disintegration of hard material – Processes – With material-handling
Patent
1983-02-08
1984-12-04
Purser, Ernest R.
Mining or in situ disintegration of hard material
Processes
With material-handling
299 31, 299 89, 175 91, E21D 910
Patent
active
044860501
ABSTRACT:
A machine for boring a tunnel having an end face wall, a roof wall, a bottom wall, and opposite side walls. The machine comprises a rotatable cutting wheel means having an annular peripheral wall supporting a plurality of cutting devices and a generally convex-shaped upper wall supporting a plurality of cutting devices. The cutting wheel means is rotatable about an axis of rotation which is inclined in a forward direction relative to a plane perpendicular to the longitudinal axis of the tunnel for simultaneously cutting the tunnel face along two intersecting surfaces defined by the cutting devices on the annular peripheral wall and the cutting devices on the convex-shape upper wall. Support shoe means are mounted beneath the cutting wheel means for movably supporting the cutting wheel means on the tunnel floor. Drive motor means are mounted on the support shoe means and are operatively associated with the cutting wheel means for causing rotation of the cutting wheel means relative to the tunnel face and the support shoe means. Thrust means are connected to the support shoe means for advancing the cutting wheel means and the support shoe means toward the tunnel face. Gripping means are associated with the thrust means for gripping engagement with the opposite tunnel side walls to prevent axial rearward movement as the cutting wheel means and the support shoe means are advanced toward the tunnel face. Vertical and horizontal steering means for changing the direction of advance of the machine are described. Paddle means and conveyor means for removing rock cuttings from the end face of the tunnel are disclosed. Shield means for shielding workers from dust and debris and for containing the cuttings are also described.
REFERENCES:
patent: 475833 (1892-05-01), Wantling et al.
patent: 678045 (1901-07-01), Seltner
patent: 2758826 (1956-08-01), Paget
patent: 4035024 (1977-07-01), Fink
Harrison Western Corporation
Purser Ernest R.
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