XING S K，LI H，FENG S H.Evolution and control of deviatoric stress in surrounding rock of gob-side entry in deep island filling face［J］.Journal of Henan Polytechnic University（Natural Science），

doi:10.16186/j.cnki.1673-9787.2023030065

Received：2023-03-27

Revised：2023-07-10

Online：2024-05-09

Evolution and control of deviatoric stress in surrounding rock of gob-side entry in deep island filling face (Online)

XING Shikun^1，2，LI Hui³，FENG Shaohua³

(1.School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo 454000，Henan，China；2.Xingdong Mine，Jizhong Energy Group Co.，Ltd.，Xingtai 054000，Hebei，China；3.School of Energy and Mining Engineering，China University of Mining & Technology-Beijing，Beijing 100083，China)

Abstract: Objectives To solve the problem of surrounding rock control in the gob-side driving roadway of the deep island filling working face， Methods taking the 12216 material haulage roadway of Xingdong Mine as the background，the FLAC3D numerical simulation software is used to study the distribution law of the deviatoric stress in the surrounding rock of the gob-side driving roadway under different filling rates in the goaf on both sides of the island face，and to simulate and analyze the evolution characteristics of the deviatoric stress in the surrounding rock of the front section of the working face under the influence of dynamic pressure during the filling mining of the island working face. Results The results showed that：（1）The coal pillar side of the roadway driven along the goaf in the island face is greatly affected by the filling effect of the side goaf.The increase of the filling rate of the side goaf makes the peak area of the deviatoric stress on the coal pillar take on an 'ellipse' shape and gradually transfer to the side of the goaf.（2）Island filling forms an arc low-value zone towards the side of the goaf in the deviating stress field of the top and bottom of the roadway along the goaf.（3）During the period of dynamic pressure disturbance of island filling，the maximum deviator stress zone is located on the side of solid coal，about 8 m away from the working face，about 4.3 m away from the roadway，and the peak value can reach 34 MPa. Conclusions Combined with the results of numerical simulation analysis，the cooperative support mode of “high-strength bolt+large-diameter and high-elongation anchor cable” is proposed.The field engineering practice shows that the surrounding rock control effect of the goaf roadway is good.

Key words:filling mining；gob-side entry driving；deviatoric stress；surrounding rock control；island coalface