Abstract: Disclosed is an extendible conveyor structure (10). Structure (10) comprises a main frame (11) supported above a ground surface by way of wheels (20). Main frame (11) comprises a number of vertical members (22) and cross-members (18) extending therebetween. Main frame (11) further comprises a number of longitudinal members (23). Either fixed to main frame (11) or rollably supported thereby is a sub-frame (14) to support a conveyor belt (16). Rollably supported to sub-frame (14) is a pair of movable sub-frames (12, 13). The conveyor belt (16) spans all three sub-frames (12, 13 and 14) and is supported by rollers (15) or alternatively by troughing plates or a combination of both. The respective sub-frames (12, 13 and 14) may be manually or automatically extended between a loading zone and a discharge zone as required.

Abstract: A belt conveyor advancing and/or retreating return end (1) is situated between a conveyor structure (2) and an excavation implement (3). Elements (1, 2 and 3) are to be located in an underground mine (12) for example. Return end (1) comprises a main frame (4) located above a crawler frame (5). Tracks (7) are mounted to the crawler frame (5) and are mounted in a parallel configuration to laterally opposed sides of the crawler frame (5). Slewing cylinders (10) are provided such that one end of each slewing cylinder (10) is connected to the main frame (4) whereas the other end is connected to the crawler frame (5). A number of levelling cylinders (11) effect vertical movement of crawler tracks (7) relative to crawler frame (5) which in turn effects vertical movement of the main frame (4).