摘要
针对某矿8110工作面运输巷底板破坏严重问题,采用数值模拟巷道底板塑性区分布情况,得到塑性破坏范围与工作面距离呈负相关。通过分析该矿底板岩性和结构状态、水理作用及采动应力对巷道底鼓情况的影响,提出底板超挖锚杆加固回填的支护方案。治理后,巷道最大底鼓量仅为58 mm,较治理前降低了80.67%,支护有效提高了底板围岩强度。
In response to the serious problem of damage to the bottom plate of the transportation roadway in the 8110 working face of a mine,numerical simulation was used to investigate the distribution of plastic zones in the roadway bottom plate,and it was found that the plastic failure range is negatively correlated with the distance from the working face.By analyzing the rock properties and structural state of the mining floor,the influence of hydraulic action,and mining stress on the floor heave of the roadway,a support plan of bottom plate overbreak,anchor reinforcement,concrete backfrlling is proposed.After treatment,the maximum floor heave of the roadway was only 58 mm,a decrease of 80.67%compared to before treatment,and the support effectively improved the strength of the surrounding rock of the floor.
作者
袁长才
YUAN Changcai(Hongsi Coal Industry Co.,Ltd.,Ningxia Baofeng Group)
出处
《现代矿业》
CAS
2023年第11期223-225,230,共4页
Modern Mining
关键词
软岩底鼓
塑性破坏
底板超挖
锚杆加固
混凝土回填
rock floor heare
plastic failure
bottom plate overbreak
anchor reinforcement
concrete backfilling
