![]() |
發(fā)布時間: 2013-8-21 17:07
正文摘要:煤巷放炮掘進(jìn)幾何模型如圖1示,煤層抗拉強(qiáng)度 = 0.6MPa,初始瓦斯壓力 = 1.22MPa,地應(yīng)力為9MPa量級(埋深約360m)。 1.8m´1.8m 5 |0 Y. K% d# ^$ ~3 I S開挖/ `4 M: ^/ p' q" \; v1 g1 _# o$ R9 ~ ... |
Archiver|手機(jī)版|小黑屋|機(jī)械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,浙公網(wǎng)安備33038202004372號 )
GMT+8, 2025-9-15 05:56 , Processed in 0.106509 second(s), 27 queries , Gzip On.
Powered by Discuz! X3.5 Licensed
© 2001-2025 Discuz! Team.