陕西煤炭2024，Vol.43Issue(2)：1-5,5.DOI:10.20120/j.cnki.issn.1671-749x.2024.0201
基于采空区刚度演化的采场围岩稳定性分析
Stability of surrounding rock in mining area based on development of gob stiffness
摘要
Abstract
In order to investigate the influence of the stiffness of goaf on the stability of surrounding rock in mining area,three numerical models with different goaf stiffness were constructed using PHASE 2D finite element software.ModelⅠhad the highest goaf stiffness,ModelⅡthe lowest,and ModelⅢthe medium.The development of the plastic zone in front of the working face,the vertical displacement of the immediate roof and the overlying strata,and the abutment pressure of the min-ing face were studied.The results showed that:when the mining face advanced 150 m,the widths of the plastic zones in front of the mining face for Models Ⅰ,Ⅱ,and Ⅲ were 2.08 mm,3.56 mm and 3.13 mm,respectively.Hence,the greater goaf stiffness,the smaller plastic zone in front of face.The maximum vertical displacement of the immediate roof were 38.8 mm,106.6 mm,and 96.8 mm,respectively,while the maximum vertical displacement of the overlying strata were 44.85 mm,148.25 mm,and 137.36 mm.As the mining face advanced,the abutment pressure coefficient in front of the face increased first before it is stabilized.The peak values were 2.1,3.7,and 3.4 for Models Ⅰ,Ⅱ,and Ⅲ,respectively.As a result,in-creasing the goaf stiffness is beneficial to improving the stability of the surrounding rock in mining areas.关键词
采空区/刚度演化/应力分布/岩层移动/煤体塑性区/围岩稳定性Key words
goaf/stiffness development/stress distribution/strata movement/coal body plastic zone/stability of surrounding分类
矿业与冶金引用本文复制引用
张杨,许广辉,李鹤鹤,宋高峰..基于采空区刚度演化的采场围岩稳定性分析[J].陕西煤炭,2024,43(2):1-5,5.基金项目
国家自然科学基金资助项目(52004010) （52004010）
北京市属高等学校优秀青年人才培育计划项目(BPHR202203036) （BPHR202203036）
贵州省科技计划项目(黔科合支撑[2023]一般122) （黔科合支撑[2023]一般122）
