time-rock span 中文意思是什麼
time-rock span
解釋
時代-地層跨度-
Therefore, it is very important to study the rock mass quality classification and properly assess the surrounding rock mass stability of a large span and high side wall underground powerhouse. it not only determines the success of the project, but effects the investment and time limit
因此,圍巖巖體質量及其穩定性評價對于這種修建在復雜巖體中的高邊墻、大跨度地下洞室群來說至關重要,不僅決定地下工程的成功修建,而且決定著工程的安全性和經濟合理性。
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