摘要
针对鲁西煤矿3上107沿空轨巷受采动影响后破坏严重的问题，采用岩石破裂过程数值分析软件（RFPA^2D）模拟及现场实测相结合的方法，对巷道围岩变形破坏机理及主要影响因素进行分析；针对巷道围岩变形破坏特点，提出“卸压与整体支护”的新思路及相应支护方案和措施，并成功进行了现场工业性试验．研究结果表明：导致巷道严重破坏的主要因素为12m保护煤柱使巷道位于高应力条件下；距采空区一侧边缘5～8m为该条件下巷道布置的合理位置．在巷道受采动压力作用时，采用“卸压与整体支护”的思路所设计的锚固方案是较成功的支护形式．
Aiming at the practical problem of mining induced failure of No. 107 gob-side entry in Luxi coal mine, deformation and failure mechanism as well as the main influencing factors were analyzed by using the numerical analysis software （RFPA^2D） and on-site measurement. According to the new idea of ＂stress relief and integer-supporting＂, the reasonable support scheme is put forward to control the deformation and failure of surrounding rocks. The result shows that 1） the main factor causing severe damage to the roadway is the 12 m long protected pillar, making the roadway be under a high pressure, and 2） the reasonable position of roadway should be 5~8 m far away from one side of the gob, and 3） when the roadway is influenced by mining induced pressure, the bolting scheme based on the new idea of ＂stress relief and integer- supporting＂ is recommended.
出处
《采矿与安全工程学报》
EI
北大核心
2007年第1期109-113,共5页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(50490273
50674083)
教育部科学技术研究重点项目(106085)
关键词
采动巷道
RFPA数值模拟
支护对策
卸压技术
整体支护
mining induced roadway
RFPA numerical simulation
support measures
stress relief technique
integer support
