Research on ground stress testing and distribution law in five zones of Zaoquan coal mine
YONG Xingcheng
JIAO Weijun
XU Haitao
LIU Yufei
Abstract：In order to obtain the distribution pattern of in-situ stress in the five zones of Zaoquan Coal Mine,the hydraulic fracturing method was used to conduct on-site testing on the in-situ stress of the original rock.The results show that the maximum horizontal principal stress among the 5 measurement points is 12.66 MPa,and the minimum is 4.96 MPa;The maximum horizontal principal stress is 6.08 MPa and the minimum is 2.33 MPa;The types of geostress fields are all horizontal principal stress fields.Except for measurement point 4,the order of stress magnitude in all directions at other measurement points is σH>σv>σh;The maximum horizontal principal stress directions at measurement points 1-3 are N16.5°W、N30.9°W and N22.3°W,respectively,with strong consistency.Measurement points 4 and 5 are affected by the fold structure,and the maximum horizontal principal stress directions are N42.6°E and N24.8°W,deviating towards the direction perpendicular to the fold axis.
Keywords：five zonehydraulic fracturing methodin-situ stress measurementmining stress distribution law
Publication Date：2024-08-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 7-12 )