Discussion of no pillar mining to enhance roadway during excavation

Pillar less Mining Technology with Y Type Ventilation needs the gateway retained along goaf maintaind to the next coal mining working faces to actual mining. Coal mine engineers experienced the supporting to the gateway retained along goaf with a variety of supporting materials through several decades of unremitting efforts, and they could be not able to explore an effective supporting technology. Now Pillar less mining technology with Y type ventilation succeeded by using the cement wall, the high density of anchor lock, bolt combined support in the process of excavation roadway and the reinforced support. Linking with our actual conditions, Coal mine made a support plan with the Y type ventilation and succeeded in the Pillar less mining technology with Y type ventilation. Here is the application and discussion of the high density of anchor lock, bolt combined support in the process of excavation roadway and the reinforced support in my mine