Numerical simulation optimization on parameters of bolt support in semi coal and rock roadways 半煤岩巷锚杆支护参数优化数值模拟研究
Reducing noise on roadways can benefit frogs that use sound in mating behaviour in wetlands nearby. 降低公路上的噪音可以使湿地附近利用声音辅助交配活动的青蛙受益。
The surrounding rocks of arched roadways are much more stable than that of rectangular roadways. 圆弧拱巷道围岩稳定性要远大于矩形巷道。
Support Technology of Roadways Driving in Steep Middle Thick Coal Seam 急倾斜、中厚煤层巷道掘进支护技术
The images of the torn roadways in the Cedar City landslide will become almost commonplace throughout N America. 雪松市山崩中被撕裂的道路的景象届时在整个北美将几乎变得稀疏平常。
Other factors that may affect dam selection are roadways, fishway, locks, and log passages. 其他影响选坝的因素有道路,鱼道,船闸和筏道等。
Level in Xing'an Coal Mine, the engineering characteristics of combined support with bolt wire cable and shotcrete in roadways driving are analyzed. 结合兴安煤矿四水平中央泵房的工程实践,分析了在掘进巷道中锚网索喷支护的工程特点。
The improvement of the stress field of the rocks surrounding the roadways in collapsed area and the process and the inducement of their with-time continuous deformation and failure after the roadway reinforcement are analyzed. 分析了塌陷区巷道加固后围岩应力场的改善,以及加固后围岩随时间不断变形破坏的过程和诱因。
Application of Fault Tree Analysis Method in Inclined Roadways Transport 事故树分析法在斜巷运输事故中的应用
Although the span of roadways has a small influence on broken rock zone, it should not be neglected in underground engineering. 虽然巷道跨度对松动圈影响较小,但实际工作中它的影响仍不能忽略不计。
The bolting support principle is introduced to support roadways in extremely soft seam of coal mine with complex roof. 复合顶板极软煤层巷道是围岩变形剧烈且顶板易冒落极难维护的巷道。
Bridge roadways, edge girders and arches must be blasted so that they are broken at vital points. 桥上路面,边缘横梁和桥拱,都必须加以爆破,以保证在重要部位上的破碎。
A paving stone of crushed granite and cement. broken stone used in macadamized roadways. 人造铺地石用花岗岩碎屑和水泥造的铺路石用来简易铺装路面的碎石。
Governments also promote carrier development by supporting research and providing right-of-way such as roadways and airports. 政府还通过支持研究和提供诸如公路和机场用地的方式来促进运输商的发展。
Not allowed to cross, Reliance sit sidewalks, roadways and railway crossing the barrier. 不准穿越、倚坐人行道、车行道和铁路道口的护栏。
Excavation in metal mine roadways in broken surrounding rocks under the effect of high pressure water gushing may lead to serious accidents. 在金属矿山破碎围岩巷道的掘进施工中同时存在高压涌水作用,可导致重大安全事故。
Tearing open creates crevasses, dropping bridges, heaving roadways, collapsing homes and buildings, exploding gas and water mains, and often lots of terrifying rumbling noises. 撕裂会制造出裂缝,大桥坍塌,道路起伏,家园和房屋倒塌,天然气和自来水管道爆炸,而且经常会有很多令人恐惧的隆隆声噪音。
Application and experiment result of radio wave in roadways is introduced. 介绍了无线电波在巷道中的应用情况及实验结果。
The supporting characteristics of roadways driving along next goaf in repeated mining of strip pillar were analyzed. 详细分析了条带煤柱复采时沿空掘巷的支护特点。
Application of Retaining Roadways along Goaf at Fully Mechanized Coal Face in Xin'an Coal Mine 沿空留巷技术在新安煤矿综采工作面的应用
Numerical simulation and application of large deformation law of chamber pilot roadways in deep soft rock 深层软岩中硐室导巷大变形规律的数值模拟及应用
Finally the author gives some suggestions in improving radio propagation in roadways. 最后,提出了改进无线电波在井巷中使用效果的几点建议。
May: The major roadways are back to normal, but it'll still take a long time to get home from the Changsha Railway Station. 主要交通线已经恢复正常了,不过到了长沙火车站,还得要很长时间才能到家。
Look for and report broken utility lines and damaged roadways and railways to appropriate authorities. 寻找并向适当的主管单位通报毁损的维生管线及受损的道路与铁路。
Uses the New Technology of Retain Roadways Along Goaf, Enhances the Mine Safety and the Benefit 采用沿空留巷新技术提高矿井安全和效益
The Application of New Bolting System in Roadways with Kinetic Pressures 新型锚杆支护体系在动压巷道中的应用
Downed trees and power lines tossed across roadways also slowed search-and-rescue crews'efforts. 倒下的树和电缆横七竖八置于路面上延缓了搜救人员的搜救行动。
U steel-cable bolt supports used in soft rock roadways with dynamic pressure: a research and application 动压软岩巷道U型钢-锚索协同支护技术研究与应用
Quick Roadway Excavation with Hoisting by Air-return Shaft Support Technology of Roadways Driving in Steep Middle Thick Coal Seam 利用进回风立井改绞实现矿井快速掘进急倾斜、中厚煤层巷道掘进支护技术