摘要
针对内蒙新上海一号煤矿112052工作面胶带顺槽底板底鼓变形迅速(平均500 mm/月),严重影响矿井安全生产及标准化施工这一现象,通过现场岩样矿物成分分析及室内力学试验,对软岩底鼓变形机理进行了分析;并结合FLAC3D数值模拟和现场矿压监测,对软岩底板预应力锚索束联合注浆加固方案进行了论证研究;结果表明:预应力锚索束联合注浆支护能减小围岩塑性区范围,有效控制软岩巷道底鼓变形,保证巷道安全生产和标准化施工。
With a rate of average 500 mm per month,the rapid floor heave deformation of No.112052 gateway of new Shanghai No.1 Mine in Inner Mongolia has seriously influence on safety conduction and standardized construction. In this article,according to the mineral analysis of rock samples and laboratory test,the deformation mechanism of floor heave is analyzed. In combination with FLAC3 Dnumerical simulation,a validation study on prestressed anchor cable ties associated with grouting reinforcement support technology was conducted. It turns out that prestressed anchor cables associated with grouting reinforcement support technology can reduce the scope of the plastic zone of surrounding rock,effectively control floor heave deformation and guarantee the safety production and standardization construction of soft- rock roadway.
出处
《煤矿安全》
CAS
北大核心
2014年第9期32-34,39,共4页
Safety in Coal Mines
基金
国家自然科学基金资助项目(51174128)
山东科技大学研究生科技创新基金资助项目(YC130313)
关键词
软岩
底鼓
锚注
锚索束
数值模拟
soft rock
floor heave
bolt-grouting
anchor beam
numerical simulation
