Multi-field coupling low-permeability soft coal seam hole punching pressure relief extraction simulation test method

The invention discloses a multi-field coupling low-permeability soft coal seam hole punching pressure relief extraction simulation test method, which comprises the following steps of early-stage preparation, gas adsorption before hole punching, gas extraction before hole punching, gas extraction bef...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	MA GENG, LIU DONG, TANG XUPEI, WU XUEFENG, TAO YUNQI, YIN GUANGZHI, XU JIANG, LIU XIAO, PENG SHOUJIAN, WANG WEIZHONG, FENG DAN, CHEN YUEXIA
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 discloses a multi-field coupling low-permeability soft coal seam hole punching pressure relief extraction simulation test method, which comprises the following steps of early-stage preparation, gas adsorption before hole punching, gas extraction before hole punching, gas extraction before hole punching completion, hole punching, hole punching completion, gas adsorption after the hole punching, gas extraction after the hole punching, gas extraction after the hole punching completion and tests in the same group and other groups. Therefore the multi-field coupling low-permeability soft coal seam hole punching pressure relief extraction simulation test method is provided; the change conditions of coal seam parameters under the actual work conditions are shown again; the change of a hole punching pressure relief stress field, a crack field, a seepage flow field and a temperature field is studied; the relationship among the low-permeability soft coal seam hole punching pressure relief, the hole punching water pressure, the hole punching pushing speed and the rotating speed is analyzed; the space-time evolution regularities during the hole punching fracturing fissure passage and coal seam gas flowing coupling are analyzed; and the influence scope and the influence mechanism of the punching hole pressure relief are better analyzed through the extraction comparison before and after the hole punching.