摘要
以临涣煤矿六采区的地质条件为背景,使用FLAC^(3D)有限元计算方法,对比探索在不同区段煤柱宽度下,巷道围岩稳定性的差异。结果表明:在区段煤柱宽度增加的同时,围岩垂直应力和水平应力峰值随之减小,且巷道两侧应力峰值差值不断减小;煤柱宽度增加,煤柱稳定性逐步增强;巷道两帮塑性区破坏形式39 m和49 m煤柱以张拉破坏为主,59 m和69 m煤柱以剪切破坏为主,巷道两帮塑性区范围较大;区段煤柱的留设宽度为59 m。
Taking the geological conditions of the sixth mining area of Linzhuo Coal Mine as the background and using the FLAC^(3D) numerical simulation calculation method to compare and analyze stability of surrounding rock of the roadway under the width of coal column in different sections.The results show that with the increase of the width of the coal column in the section,the vertical stress and horizontal stress peak of the surrounding rock decrease,and the difference between the peak stresses on both sides of the roadway decreases.The width of the coal column increased,and the stability of the coal column was gradually enhanced.The failure forms of the two gang plastic zones of the roadway the 39 m and 49 m coal columns are mainly tensile failure,the 59 m and 69 m coal columns are mainly shear failure,and the two plastic zones of the roadway are large.The width of the coal columns in the section is 59 m.
作者
赵石
娄培杰
ZHAO Shi;LOU Peijie(School of Civil Architecture,Anhui University of Technology,Huainan 232001,China;Engineering Research Center for Geological Environment and Underground Space of Jiangxi Province,East China University of Technology,Nanchang 330013,China)
出处
《四川建材》
2023年第6期84-86,共3页
Sichuan Building Materials
基金
江西省地质环境与地下空间工程研究中心开放基金资助项目:煤矿地下水库煤柱坝体劣化失稳试验研究(JXDHJJ2022-007)。
