n.井筒內(nèi)橫木(巷道橫梁;嵌入梁)
Keywords Gate Tunneling Steel support stemple Support; 順槽;掘進;鋼架托梁;支護;
Keywords stemple support;hot rolling;spiral steel bar;process design; 巷道支護;熱軋;螺旋鋼筋;工藝設(shè)計;