Prevention treatment method for fully mechanized coal mining face
The invention discloses a fully mechanized coal mining face prevention and treatment method which comprises the following steps: when a working face is stoped to climb towards an oblique shaft part, pre-grouting holes are drilled in a lower side of a return airway and an upper side of a transportati...
Gespeichert in:
Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , |
---|---|
Format: | Patent |
Sprache: | chi ; eng |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Schreiben Sie den ersten Kommentar!