A new calculating method for the mechanical behaviours of floors with underground water inrush inlongwall mining is proposed in this paper. 本文針對采場(chǎng)底板的層狀結構特征，建立了分析采場(chǎng)底板突水問(wèn)題的結構模型。
To make water use more efficient, says Koichiro Matsuura, the head of UNESCO, the main UN agency dealing with water, will require fundamental changes of behaviour. 處理水問(wèn)題的主要聯(lián)合國機構聯(lián)合國教科文組織總干事松浦晃一郎說(shuō)，要想更高效利用水資源，就需要我們在行為上做出徹底改變。
