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巷道断面形状有哪几类?
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巷道断面形状有哪几类?
时间:2022-06-29 09:00
关键词:
井巷工程
大学试题
工学
答案解析
<p> 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。</p>
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