请输入您要查询的字词:
单词
shrinkage stoping mining method
释义
shrinkage stoping mining method
Encyclopedia
工学
房柱采矿法
释
shrinkage stoping mining method
留矿采矿法
将矿块划分为矿房、矿柱,先采矿房,后采矿柱,自下而上分层回采,每次采下矿石靠自重放出三分之一左右,剩余矿石留在矿房内作为继续上采的工作平台;矿房全部采完后,再将留在矿房中的矿石再进行大量放矿的一种采矿方法。由于随回采工作的推进,矿房以敞空形式存在,靠围岩的稳固性和矿柱来维护顶板稳定,因此属于空场采矿法的一种。
随便看
foreign language
Foreign Language abilities
Foreign Language Aptitude Test
Foreign Language Assessment
Foreign language assessment
Foreign Language Assessment in China
Foreign Language Autonomous Learning Ability
Foreign Language Entry Test
Foreign Language Placement Test
Foreign Language Proficiency Scale
foreign languages bookstores
Foreign Language Scholastic Aptitude Test
Foreign Language Teaching and Learning in Primary and Secondary Schools
Foreign Language Teaching and Research
Foreign Language Teaching and Research Press
foreign language teaching dictionaries
foreign language teaching pedagogy
Foreign Language World
foreign legal history
foreign link
foreign matters in cotton
Foreign Medicine Standard
foreign mission
Foreign Missions of Milan
foreign modern building technology
科学参考收录了854744条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。
Copyright © 2000-2023 Sciref.net All Rights Reserved
京ICP备2021023879号
更新时间:2025/7/3 21:35:18