\begin{document}$(3.53\pm0.22_{\rm{stat.}}\pm0.07_{\rm{sys.}})\times10^{-10}$\end{document} cm\begin{document}$^{-2}$\end{document}s\begin{document}$^{-1}$\end{document}. The observed angular distributions indicate the leakage of cosmic-ray muon background and agree with simulation data accounting for Jinping mountain's terrain. A survey of muon fluxes at different laboratory locations, considering both those situated under mountains and those down mine shafts, indicates that the flux at the former is generally a factor of \begin{document}$(4\pm2)$\end{document} larger than at the latter, with the same vertical overburden. This study provides a convenient back-of-the-envelope estimation for the muon flux of an underground experiment."> Muon flux measurement at China Jinping Underground Laboratory -
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