摘要
针对阳煤五矿赵家分区井底车场矸石装车线巷道的强烈底鼓问题,通过现场底板破坏特征分析,以及FLAC3D内置的应变软化模型与摩尔库伦模型对构造应力场的对比分析,揭示了高应力软岩巷道强烈底鼓的原因:底板岩体经应变软化后水平应力释放较大,应力值较低,在二次水平应力的作用下,发生峰后扩容产生强烈底鼓。底板必须与顶帮形成一样的支护强度,才能使巷道断面受力均匀。数值模拟与工程实践证明,采用底板锚注技术后底鼓得到了有效的控制。
To counter to the problem of serious floor heave in the waste-loading roadway at the bottom in Zhaojia District of Yangquan No. 5 Mine, the causes of the serious floor heave occurred in the high-stress soft-rock roadway were revealed through the analysis of the floor failure characteristics and the comparative analysis of the built-in stain softening model in FLAC3D and the molar Coulomb model with the structural stress field;the horizontal stress of the floor rock was greatly released after the strain softening, the stress value was small, and under the action of the secondary horizontal stress, the post-peak dilatation caused the occurrence of the serious floor heave. The bottom and two sides of the roadway must have the same support strength so as to make a uniform force on the roadway section. The numerical simulation and engineering practice proved that the floor heave was under effective control after the floor anchor and grouting technology was applied.
出处
《矿业安全与环保》
北大核心
2015年第2期104-107,共4页
Mining Safety & Environmental Protection
关键词
底鼓
软岩巷道
高应力
深部矿井
floor heave
soft rock roadway
high stress
deep mine