|Table of Contents|

Coupling mechanism of the thermo-hydro-mechanical(THM) in the extremely steep gas-bearing coal seams and its application(PDF)

西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

Issue:
2016年06期
Page:
793-800
Research Field:
Publishing date:

Info

Title:
Coupling mechanism of the thermo-hydro-mechanical(THM) in the extremely steep gas-bearing coal seams and its application
Author(s):
CHANG Bo1CHEN Jian-qiang1LIU Jun23SUN Huan4YAN Rui-bing4
1.Shenhua Xinjiang Energy Co.,Ltd.,Urumqi 830027,China;
2.China Coal Technology Engineering Group Chongqing Research Institute,Chongqing 400037,China;
3.State Key Laboratory of Gas Disaster Detecting,Preventing and Emergency Controlling,Chongqing 400037,China;
4.College of Energy Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China
Keywords:
coupling model coal seam gas temperature porosity permeability
PACS:
TD 712
DOI:
10.13800/j.cnki.xakjdxxb.2016.0606
Abstract:
Aimed at revealing the coupling mechanism of the thermal,hydrological and mechanical(THM)fields,numerical model of multi physics of the THM fields has been established on the extremely steep thick coal seams with CH4 gas.Relations of permeability,temperature and CH4 gas pressure have been revealed during the gas extraction in the extremely steep thick coal seams.The solutions and suggestions have also been proposed reasonably depending on the in-situ CH4 gas extraction.The results show that the gas extraction zone is extending as the stress dropping and the time duration.However,the stress gradient is decreasing as the deeper drilling boreholes.The temperature in the coal mass is higher than the borehole wall.Based on the non-linear relations of the temperature,the pressure and the time duration,the technical schemes of the gob extraction,the high level extraction along the trending and the intercept extraction and pressure liberation have been designed correspondingly.These methods have a significant effect on the practice.

References:

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Last Update: 2016-11-28