Monitoring determining method for working face goaf lateral coal plastic area width

A monitoring determining method for the working face goaf lateral coal plastic area width comprises the steps that (a) within the range of advancing a working face by 50 m to 100 m, a plurality of horizontal holes with different depths are drilled in a non-mining wall of a mining roadway; (b) a bore...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	WANG SHUWEN, XIA YONGXUE, QIN ZIHAN, LAN HANG, MAO DEBING, PAN JUNFENG
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS
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