摘要
针对双马一矿12201运输巷变形破坏严重的问题,结合双马一矿11号和12号近距离煤层实际赋存环境,运用FLAC3D软件分析掘巷、工作面回采围岩应力演化规律。模拟结果显示,在掘巷期间两帮出现不对称应力升高区。工作面回采稳定后,运输巷采空区帮转为应力降低区,而实体煤帮在多重扰动作用下,巷帮侧向支承压力明显升高。根据模拟结果对巷道支护进行优化设计,巷帮采用全锚索支护并且增加锚杆索支护密度。现场实测表明,两帮围岩变形100 d内稳定在300 mm,顶板变形量稳定在200 mm,优化支护方案明显减少了巷道围岩变形量,巷道锚固圈稳定,有效控制围岩变形。
Aiming at the serious problem of deformation and failure of No.12201 transportation roadway,combined with the actual occurrence environment of No.11 and No.12 close distance coal seams in Shuangma No.1 Mine,FLAC3D software was used to analyze the stress evolution law of surrounding rock in roadway excavation and face mining.The simulation results showed that during the roadway excavation,the two sides had asymmetric stress increase area.After the mining of No.12201 Face was stable,the goaf side of the transportation roadway was converted into a stress reduction area,and the lateral abutment pressure of the solid coal side was significantly increased under the action of multiple disturbances.According to the simulation results,the roadway support was optimized.Full anchor cable support was adopted in roadway side and increased the support density.The field measurement showed that the deformation of the surrounding rock of the two sides was stable at 300 mm for one hundred days,and the deformation of the roof was stable at 200 mm.The optimized support scheme obviously reduced the deformation of the surrounding rock of the roadway,the anchorage ring of the roadway was stable,and the deformation of the surrounding rock was effectively controlled.
作者
周阳
马晓龙
Zhou Yang;Ma Xiaolong(Ningxia Coal Industry Co.,Ltd.of CHN Energy,Yinchuan 750000,China)
出处
《煤炭与化工》
CAS
2024年第1期45-47,73,共4页
Coal and Chemical Industry
关键词
近距离煤层
应力演化
多重扰动
支护优化设计
全锚索支护
支护密度
close distance coal seams
stress evolution
multiple disturbances
supporting optimization
full anchor cable support
support density
