软岩巷道中三维网壳衬砌支护技术研究与应用  

Research and Application of Three-dimensional Mesh-shell LiningSupport Technology in Soft Rock Roadway

作　　者：张金松[1] 唐雨轮 周长伟 庞建勇[1] ZHANG Jinsong;TANG Yulun;ZHOU Changwei;PANG Jianyong(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan Anhui 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《安徽理工大学学报（自然科学版）》2023年第6期73-81,共9页Journal of Anhui University of Science and Technology:Natural Science

基　　金：安徽省高校自然科学研究项目(2023AH051219);矿山建设工程安徽省高校重点实验室基金(GXZDSYS2022102);建筑结构与地下工程安徽省重点实验室基金(KLBSUE-2021-01)。

摘　　要：针对我国煤矿软岩巷道常规支护方式存在的诸多不足,基于地面大跨度网壳结构的力学原理,设计一种新型三维网壳衬砌结构,并在室内对该三维网壳砌衬结构进行了相似模型试验,结果显示单片模型结构的破坏属于压剪破坏,外荷载接近极限值时,三维网壳支架内主弧筋和次弧筋达到屈服,喷层混凝土达到其强度极限;整架模型结构的承载力达到318 kN,模型结构失稳表现为右直腿被折断,拱顶没有出现破坏,左直腿中间部分出现裂纹。根据室内试验结果将其设计成全封闭的三维网壳锚喷结构,通过数值模拟分析,发现该结构可以很好地改善围岩的应力分布,减少围岩位移量,从而提高结构承载力,确保支护结构的长期稳定性。In view of the shortcomings of conventional support methods in soft rock of coal mine roadway in China,based on the mechanical principle of ground long-span reticulated shell structure,the new three-dimensional reticulated shell lining structure was designed in the research.The mechanical properties and damage development law of the structure were studied through the similar model test of the three-dimensional reticulated shell lining structure.the results showed that the failure of the single model structure belonged to the compression-shear failure,and when the external load was close to the limit,the main and secondary arc tendons in the three-dimensional reticulated shell support yielded,and the sprayed concrete reached its strength limit.The bearing capacity of the whole model structure reached 318kN and the model structure lost stability with the right straight leg of the model broken and cracks in the middle of the left straight leg,however without any damages at the vault of the model.Based on the indoor test,it is designed as a fully closed three-dimensional mesh shell anchor spray structure,and through numerical simulation analysis,it was found that the structure improved the stress distribution of the surrounding rock much and reduced the displacement of the surrounding rock,so as to improve the structural bearing capacity and ensure the long-term stability of the support structure.

关 键 词：软岩巷道 衬砌 三维网壳 相似模拟试验 

分 类 号：TD353[矿业工程—矿井建设]