既有矿洞改扩建成地下实验室设计方案可行性研究

Feasibility Study on Design Scheme of Underground Laboratory by Expanding Existing Mine Tunnel

为解决高精度、高灵敏前沿物理实验室运行环境高稳定需求,以莫干山矿洞改扩建工程为实例,基于既有矿洞造价低、建设周期短、稳定性强、功能基本齐备等优势,对既有矿洞改扩建成公里级地下实验室的设计方案可行性展开研究,提出“因地制宜、特色突出、有限改造、同步建设、空间预留”的设计理念,创新性地采用高密度电法、地质雷达法等综合推演采空区数据,建立可靠性高的既有矿洞改扩建成地下实验室设计体系。研究结果表明:1)充分利用既有矿洞平纵横的空间条件,能够对南侧矿洞功能进行合理定位,并预留扩容条件;2)采用原位单侧和双侧2种改扩建形式,能够解决设计中断面选型的设计难点;3)采用上部注浆加固和下部综合治理方案,有利于解决采空区治理的难题;4)采用火灾的早期预测和其他控制措施,能够有效降低火灾发生频率及损失。

In order to meet the high stability requirements of high-precision and highly sensitive cutting-edge physics laboratory operating environment,by taking the Moganshan mine tunnel renovation and expansion project as an example,the feasibility of the design scheme for the renovation and expansion of existing mines into kilometer level underground laboratories is studied based on the advantages of low cost,short construction period,strong stability,and basic completeness of functions of existing mines.The design concept of"adapting to local conditions,highlighting characteristics,limited renovation,synchronous construction,and space reservation"is proposed,high-density electrical methods,geological radar methods,and other comprehensive methods are used to deduce goaf data,and a highly reliable design system for the renovation and expansion of existing mines into underground laboratories is established.The research results indicate that:(1)By fully utilizing the spatial conditions of the existing mine tunnels in both horizontal and vertical directions,the functions of the mine tunnels on south sides can be reasonably positioned,and expansion conditions can be reserved;(2)Adopting two forms of reconstruction and expansion,i.e.,in-situ single side and double side,the design difficulties of section selection can be solved;(3)Adopting the treatment plan of upper grouting reinforcement and lower comprehensive,the goaf treatment problem is easy to be solved;(4)The use of early fire prediction and other control measures can effectively reduce the frequency and losses of fires.