Method for measuring effective coal-mine gas extraction radius

The invention provides a method for measuring an effective coal-mine gas extraction radius. The method comprises the following steps: an extraction drilling hole is formed in a coal wall; two observation holes are formed in the two sides of the extraction drilling hole, wherein the distances between...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	LI FENGMEI, SHI JIANXIN, PAN RUIQING, ZHANG HONG, SONG WENYI, PENG JIANGUO, SUN JINGLAI, MA XUEQIN, WANG BIN, ZHOU LIANCHUN, LI GUANGYING, LI XIANG, WANG ZHONGMIAN, YANG YINGCHAO
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
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The invention provides a method for measuring an effective coal-mine gas extraction radius. The method comprises the following steps: an extraction drilling hole is formed in a coal wall; two observation holes are formed in the two sides of the extraction drilling hole, wherein the distances between the two observation holes and the extraction drilling hole are different; gas extraction is performed on the extraction hole; gas pressure reduction conditions of the two observation holes are monitored periodically; the range of the effective coal-mine gas extraction radius is reduced in a halving manner until the effective coal-mine gas extraction radius is determined. With adoption of the method provide by the invention, the effective coal-mine gas extraction radius can be rapidly measured, damage to integrity of a coal body can be reduced and the accuracy of a measurement result can be improved.