巷道断面形状有哪几类？ -题库考试答案搜索网

巷道断面形状有哪几类？

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2022-06-29 09:00

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正确答案

我国煤矿井下使用的巷道断面形状，按其构成的轮廓线可分为折线形和曲线形两大类。前者如矩形、梯形、不规则形，后者如半圆拱形、圆弧拱形、三心拱形、马蹄形、椭圆形和圆形。

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标签：井巷工程大学试题工学

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