Various embodiments described herein generally relate to techniques for conveying articles on a conveyor system of a robotic material handling system in a material handling environment. In accordance with an embodiment, the robotic material handling system includes a front portion and a rearward conveyor. The front portion may be expandable to a first configuration and retractable to a second configuration. On detecting a jam on the front portion, the robotic material handling system may actuate expansion of the front portion to the first configuration, and attempt to dislodge the jammed articles by causing one or more of (i) separating the jammed articles by activating one or more of a plurality of zones of the front portion under the jammed articles, and/or (ii) activating one or more of the plurality of zones under the jammed articles in a reverse direction.