摘要
根据莱新铁矿西部采区08#矿房围岩和矿石地质情况,考虑到岩体破碎以及水渗透破坏的情况,应用FLAC2D对采场顶板的冒落规律进行了分析。数值分析发现采场顶板冒落受拉、剪应力带迁移和水渗透的影响比较严重。为此提出了采用新的长锚索工艺代替现有的短锚索工艺作为支护矿房顶板的主要手段,并对此进行了模拟。模拟结果和现场实际应用表明,长锚索支护工艺可以在回采及充填过程中有效地保证矿房顶板的稳定,这对高效回收矿产资源,确保回采作业的安全具有重要意义。
According to the fractured rockmass and pore pressure, FLAC2D is applied to study the caving-in regulation of roof. The result of simulation shown that caving-in was due to the tension, shear stress transfer and penetrability. Therefore, using the long anchorage technology instead of the short was designed to support the roof. The numerical simulation and field test result indicated that long anchor- age cable can effectively control caving-in during the course of stoping and filling. This is of great significance to the high efficiency recovery of mineral resource and the safety to mining.
出处
《化工矿物与加工》
CAS
北大核心
2010年第6期25-27,共3页
Industrial Minerals & Processing
关键词
地下开采
顶板
长锚索
数值模拟
FLAC2D
underground mining
roof
long anchor cable
numerical simulation
FLAC2D
