摘要
冲击地压和高动能矸石冲击会导致井底原煤仓仓壁防护衬板损毁、钢筋混凝土失效和围岩塌陷。为解决大块矸石对衬板造成的损害,设计了预应力金属微晶陶瓷复合衬板,并与微膨胀高强度灌浆料以及围岩锚杆形成整体结构加固拱。这种设计不仅改善了锚固区域围岩的力学性能和应力状态,还控制了围岩的变形和破坏,并有效地抵御了冲击地压引起的剪涨扩容和围岩塌陷。通过建立膨胀应力与高强灌浆料膨胀率以及膨胀介质厚度因子之间的数学模型,为膨胀应力可设计性提供了一种方法。
Rock burst and high kinetic energy refuse impact will lead to the damage of the raw coal bunker wall protective lining plate,reinforced concrete failure and surrounding rock collapse.In order to solve the damage caused by bulk refuse to the lining plate,the prestressed metal microcrystalline ceramic composite lining plate was designed,and the integral structure reinforced arch was formed with micro-expansion high-strength grouting material and surrounding rock anchor.This design not only improves the mechanical properties and stress state of the surrounding rock in the anchoring area,but also controls the deformation and failure of the surrounding rock,and effectively resists the shear expansion and collapse of the surrounding rock caused by rock burst.By establishing a mathematical model between the expansion stress and the expansion rate of high strength grout and the thickness factor of the expansion medium,a method was provided for the designability of the expansion stress.
作者
强丁
范跃虎
周洪波
贾锡永
曹龙波
吕阳
QIANG Ding;FAN Yuehu;ZHOU Hongbo;JIA Xiyong;CAO Longbo;LYU Yang(Shaanxi Huangling No.2 Coal Mine Com pany Limited,Huangling 727300,China;China Coal Xi'an Design Engineering Com pany Limited,Xi'an 710000,China;No.29 Construction Department of CCTCG,Suzhou 234000,China;Anhui Xinyongsheng Microcrystalline Materials Com pany Limited,Chuzhou 239000,China)
出处
《建井技术》
2024年第3期54-58,31,共6页
Mine Construction Technology
关键词
整体结构加固拱
稳定器
预应力介质
预应力金属陶瓷衬板
回归方程
integral structure reinforced arch
stabilizer
prestressed medium
prestressed ceramet lining plate
regression equation
