问题 问答题 简答题

区段布置分层平巷方式有几种,应用条件是什么?

答案

参考答案:

(1)倾斜式:各分层平巷按25~35°方向排列,适用于煤层倾角小于15~20°;

(2)水平式:各分层平巷水平排列,适用于煤层倾角大于20~25°;

(3)垂直式:各分层平巷垂直排列,适用于煤层倾角小于8~10°。

阅读下列材料:

材料一:江南制造总局炮厂的机器房 
材料二
请回答:(1)材料一中的工业企业创办于什么运动时期,同时期该运动的口号是什么?创办这些企业的直接目的

    是什么?                                                                                                                                                                                                                                                                                                                              (2)列举李鸿章在上述运动中创办的两个重要的近代企业。根据所学知识判断材料二中李鸿章为什么会    有这样的感慨?                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              (3)上述运动的性质是什么,你是怎样认识这一重要运动的?

                                                                                                                                                               

                                                                                                                                                               

                                                                                                                                                               

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