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桃園煤礦大斷面巖巷施工特大冒頂事故經(jīng)驗分析

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根據(jù)大斷面巖巷施工實踐及遇構(gòu)造變化冒頂特征,提出了U型鋼加補(bǔ)木垛、撞楔復(fù)合超前支護(hù)的施工技術(shù)方案,為大跨度巷道冒頂施工提供了借鑒經(jīng)驗。

美麗桃園17施工組織設(shè)計dd

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is one of the pra ctical form of value s. The so-called val ues refers to the objective t hings are of no val ue and the val ue of fundamental perspective. Different values, people's behaviour, attitudes, ways are different. Pe ople -ori ented focus on huma n value a nd realit y, we need the broa dest masses as values. A dhere t o pe ople -ori ented val ues, i s to make the e conomy more devel opm

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