摘要
通过数值模拟和现场试验的方法揭示对贯通侧煤帮预注浆加固这一增强内部支护强度的方法对回撤通道稳定性的影响,通过是否注浆加固的对比性分析,得出注浆加固对提高预掘回撤通道围岩稳定性有着积极影响。注浆加固后,预掘回撤通道两侧煤柱垂直应力分布明显改善,回撤通道顶、底板表面位移及工作面剩余煤柱顶板下沉位移显著减少,底板弯曲变形减轻,锚杆受力降低。实际表明注浆加固有利于煤柱保持稳定性,为合理应用和推广注浆法加固回撤通道技术奠定了基础。
The influence of grouting reinforcement at coal-wall of connecting side on dismantle channel ’ s stability was analyzed by numerical simulation and field test.Result showed that grouting reinforcement had positive influence on improving dismantle channel ’ s stability.After reinforcement , vertical stress distribution state in coal pillars at the two sides of dismantle channel obviously improved , surface convergence of roof and floor and subsidence displacement of roof reduced largely , floor curve deformation reduced , and an-chored bolt stress decreased.Practice showed that grouting reinforcement was benefit for keeping coal -pillar stability and provided basis for rationally applying and expanding reinforcing dismantle channel with grouting .
出处
《煤矿开采》
北大核心
2014年第1期52-55,70,共5页
Coal Mining Technology
基金
国家国际科技合作项目(2010DFB73070)
国家自然科学基金委员会与神华集团有限责任公司联合资助项目(U1261211)
天地科技开采事业部科技创新基金项目(KCSJ-QNCX-2012-06)
关键词
数值模拟
注浆加固
回撤通道
稳定性
numerical simulation
grouting reinforcement
dismantle channel
stability
