Academic Center

All Issues
Latest Issue
Most Download Articles
Most Read Articles
Full Text Download
2020 Issue 12

Study on in-situ stress testing based on Kaiser effect of rock acoustic emission

Author:

LIU Libin,DUAN Dong,ZHENG Chaoyang

Author Unit:

Mining Engineering Institute , Taiyuan Unitersity of 'Technology , Taiyuan 030024,China;Malan Goal Mine , Xishan Coal Electricity Group Company ,Taiyuan 030205 , China)

Key Words:

acoustic emission;Kaiser effect; in-situ stress;uniaxial loading; principal stress
  • Abstract
  • Paper Chart
  • Related Articles
  • Citation Format
in-situ stress is the fundamental fore that causes deformation and failure of underground engineering rock mass. In-situ stresstesting technmology plays an important role in safe and efficient mining of coal mines.Basel on the enginering background of No.3 andNo.l5 coal seams in Zhengzhuang Coaul Mine, this paper conducts a theoretical analysis of the magnitude and diection of in-situ stresshased on elastic mechanics and ock acoustic emission Kaiser effect. It uses laboratory tests to sturly the distribution of ground stress, andcompare and verify with field test results. The research resuls show that the vertical stres , the maxinum horizontal principal stres andthe minmimum horizontal principal stess of the No.3 and No.15 coal seams all increase with the increase of the buriedl depth. The in-situstress distribution rules of the two coal seams are very similar and belong to the medium stes area; The maximum horizontal principalsltress of the coal seam> the vertical stress> the mininmm horizontal principal strss , that is, the tectonic stress is grealer than the self-weight stress,which is a typical stress field with tectonic stress ; the direction of the mavinmum horizontal principal stress is relatively stableand is basically concentrated anund N27° W.The ratio of the average horizontal principal stress( the average of the maxvinmm horizontalprincipal stress and the minimum horizontal principal strss ) to the vertical stress of the No.3 and No.15 coal seams roof and floor ae0.968,0.948,0.938,0.934.The natio of the average horizontal principal stress to the vertical stres of the No.3 coal seam is larger thanNo.15 coal seam.The research results provide a certain rederence value and significance for the use of moek acoustic emission Kaiser effectto test in-situ stress.
No Content Yet
No.05
May 15th,2022

Contact Us

  • All Rights of Website Desige Reserved©《COAL SCIENCE AND TECHNOLOGY》Editorial Department
  • 京ICP备05086979号-19

  • Address:8th Floor, Coal Building, District 13, Heping Street, Chaoyang District, Beijing:Ad & Finance Department(Room 1204),Editorial Department(Room 811)
  • Telephone:010-87986431(Ad Consult)
  • Mailbox: mtkxjs@vip.163.com