摘要
为保障3107辅助进风巷留巷围岩的稳定,基于3107工作面的具体地质条件和沿空留巷的具体特征,结合高水充填材料的力学性能,采用FLAC3D数值模拟软件进行高水材料巷旁充填体合理水灰比和合理宽度的模拟分析,基于模拟结果确定巷旁充填体材料合理水灰比为1.5:1,合理宽度为2.0 m,设计充填体支护参数并对留巷效果进行监测。结果表明:沿空留巷在设计支护方案下,留巷和二次回采阶段围岩变形量均满足使用要求,锚杆受力状态正常,保障了留巷围岩的稳定。
In order to ensure the stability of the surrounding rock in retaining roadway of 3107 auxiliary intake airway,the author makes a simulation analysis of reasonable water-cement ratio and width of the high-water material roadside filling body through the FLAC3D numerical simulation software,based on the specific geological conditions of 3107 working face and the specific characteristics of the retaining roadway along goaf and combined with the mechanical properties of the high-water filling material,in which it is determined that the reasonable water-cement ratio is 1.5:1 and the reasonable width is 2.0 m,whose results show that the retaining roadway and the surrounding rock deformation in the secondary mining meet the application requirements with stable bolt stress state,guaranteeing the stability of the surrounding rock of the retaining roadway.
作者
池津维
Chi Jinwei(China Coal Science&Engineering Energy Technology Development Co.,Ltd.,Beijing 100013)
出处
《江西煤炭科技》
2023年第2期120-123,共4页
Jiangxi Coal Science & Technology
关键词
沿空留巷
巷旁充填体
高水材料
数值模拟
gob-side entry retaining
roadside filling body
high-water materials
numerical simulation
