Method of working coal seams to a defined preset depth of cuttin

Details Method of working coal seams to a defined preset depth of cuttin Method of working coal seams to a defined preset depth of cuttin

1992-05-29

1994-01-04

Bagnell, David J.

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of hard material disintegrating machine

405302, E21D 2314, E21C 3514

Patent

active

052754693

ABSTRACT:
A method of working coal seams to a defined preset cutting depth during ploughing with a cutter, a face conveyor moving along a face behind the cutter being advanced by the defined preset cutting depth and this advance being made by extension of self-advancing cylinders pivotally attached at one end to the face conveyor and at the other end to face supports disposed parallel to the face conveyor. The advance is controlled in dependence upon the piston stroke of the self-advancing cylinders, carried out in dependence upon individually defined partial strokes corresponding to the preset depth of cutting. After a predetermined maximum total piston stroke has been reached, the face support connected to the respective self-advancing cylinder is automatically disengaged, advanced by the maximum total piston stroke and then re-set (self-advancing process). The length of the partial strokes corresponding to the preset depth of cutting is increased by an amount to compensate an average mechanical clearance at the pivot points of the self-advancing cylinders.

REFERENCES:
patent: 3246730 (1966-04-01), Bolton et al.
patent: 4134270 (1979-01-01), Small et al.
patent: 5137336 (1992-08-01), Merten

Affiliated with

Also associated with

Rating

Method of working coal seams to a defined preset depth of cuttin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of working coal seams to a defined preset depth of cuttin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of working coal seams to a defined preset depth of cuttin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-302410