煤矿安全2026，Vol.57Issue(3)：49-61,13.DOI:10.13347/j.cnki.mkaq.20241246
面间煤柱充填置换充填体稳定性分析
Stability analysis of filling replacement filling body of interface coal pillar
摘要
Abstract
In order to study the stability of filling body in the process of filling and replacement of interface coal pillar,based on the geological conditions of a mine in Yushen Mining Area of Shaanxi Province,the calculation models of filling body load during tun-neling,primary mining and the secondary mining were established respectively,and the critical width value satisfying the stability of filling body was obtained.The filling material ratio scheme meeting the requirements of filling replacement strength was given through laboratory tests,and the stress and elastic-plastic zone distribution characteristics of filling body were analyzed by numerical simulation.The research shows that under the conditions of different filling body widths of 8 m,12 m,16 m and 20 m,the stress con-centration factors of the filling body are 1.79,1.61,1.55 and 1.54 respectively during the tunneling period,and the development range of the plastic zone of the filling body is 2 m,and the main failure form is shear failure;during the first mining period,the stress concentration factors of the filling body are 3.66,3.26,3.04 and 2.93 respectively,and the range of the elastic zone in the middle of the filling body is 0 m,3 m,5 m and 10 m respectively;during the secondary mining period,the stress concentration factors of the filling body are 4.78,4.19,3.91 and 3.74 respectively,and the elastic zones in the middle of the filling body are 0 m,2 m,4 m and 8 m respectively.With the increase of the width of the filling body,the decrease rate of the stress concentration coefficient of the filling body tends to be gentle,and the stress distribution curve gradually presents the shape of"double peak and single-valley".Combined with theoretical analysis,it is considered that the filling body can maintain good stability when the width of the filling body is not less than 16.7 m,and the research results provide a theoretical basis for the filling and replacement of interface coal pillar under similar geological conditions.关键词
面间煤柱/充填置换/充填体宽度/应力分布/塑性区演化Key words
interface coal pillar/filling replacement/filling body width/stress distribution/plastic zone distribution分类
矿业与冶金引用本文复制引用
赵兵朝,杨忠浩,王京滨,陈浩楠,王瑞锋,拓永生..面间煤柱充填置换充填体稳定性分析[J].煤矿安全,2026,57(3):49-61,13.基金项目
国家自然科学基金资助项目(52074208) （52074208）
陕西省重点研发计划"两链"融合重点专项资助项目(2023-LL-QY-02) （2023-LL-QY-02）
