Longwall shearer are used in underground works in order to extract excavation materials or the ore in mine galleries and in faces. The ore exploitation in mines is mainly achieved through two methods: longwall mining or room and pillar mining.
- The drawdown extraction method is the complete exploitation of coal panels with backfilling or caving roof. In this case, the Longwall Shearer translates to an armoured underground chain conveyor.
- The room and pillar extraction method is a grid extraction in which pillars are retained to support the roof and upper ground. In this case, the Heading and Loading Machine is mobile and self-propelled.