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- false roof rock 伪顶岩石
- In slicing seams,bolt supporting was utilized under false roof and obtained good result. 介绍在分层开采煤层中,在假顶条件下实现锚杆支护。
- The mining craft of longwall mining method has many characteristics.The roof slice longwall method increases the work of laying false roof for next slice. 长壁采煤法的采煤工艺具有多重特点:顶分层采煤增加了要为下分层填设假顶的工作。
- The roof rock was assumed in the elastic state,established the mechanical model of coal pillar and roof system. 假设顶板岩层处于弹性工作状态情况下,建立了煤柱-顶板系统的力学模型。
- The successful applications of controlled blasting technology of false roof mining in Gaozhuang Mine of Pingdingshan Mining Bureau have attained outstanding economical &social benefit. 平顶山矿务局高庄矿的实践应用得出,控制爆破技术在托伪顶开采中的应用是成功的。
- Forward support bolt combined with roop rock by bolting can play a roll of combined beam,which can prevent roof rock caving immediately after explosion. 超前支护锚杆锚固后与顶板岩石构成一体,这样使超前锚杆形成组合梁作用,放炮后,能够阻止顶板岩石冒落。
- From whole to blocky and heavily fractured structure, the abutment stress ahead of working face reduces and the peak value of abutment stress migrates to inside of roof rock mass. 过断层后，顶板岩体中支承压力减小，比无断层存在的情况要低。由于顶板岩体中节理发育程度的不同，顶板岩体变形破坏规律和矿压分布各异。表现为由完整到块裂和碎裂结构，老顶的初次垮落步距、周期垮落步距和冒裂带高度均随着岩体破坏程度的增强而减小；顶板岩体中的支承压力亦由大到小变化，且支承压力峰值位置随着岩体破坏程度的增强向顶板岩体内部转移。
- One of the crucial elements influencing the rock burst is the structure of roof rock stratum, especially the flinty and thick sandstone roof over the coal seam. 顶板岩层结构,特别是煤层上方坚硬、厚层砂岩顶板是影响冲击矿压发生的主要因素之一。
- We thus suspected that the collapsed roof rock from one of the two oldest Yellowstone supereruptions must have melted to form the bulk of the magma that was ejected during the younger Lava Creek catastrophe and smaller eruptions since. 我们因此猜测，较年轻的克里克熔岩凝灰岩以及之后的小型喷发，岩浆来源是黄石国家公园两个最古老的超级喷发之一，其崩陷的顶层岩熔成了后来喷发出的岩浆。
- The rock mass structure can be expressed by rock stratum effect thickness influence coefficient. It is more scientific then using roof rock and sand content in the study of coal seam gas preservation. 研究表明,煤层围岩岩体结构控制了煤层瓦斯的赋存,岩体结构可用岩层效应厚度影响系数来表示,应用这一参数研究煤层瓦斯赋存比用煤层顶板岩性及含砂率更科学。
- The longwall may relax some safety problems, but the other safety problems such as hard roof rock, the colliding and friction of the caved rock each other may be induced or intensified . 但是也可能诱发一些安全问题,如坚硬顶板对支架的冲击、采空区垮落岩石的撞击与摩擦诱发瓦斯事故等。
- Gas drainage from roadway in roof rock is used in Yangquan Coal Mining Administration and comprehensive gas drainage based on gas source is used in Songzao Coal Mining Administration. 阳泉局采用顶板岩巷抽放法,松藻局采用针对瓦斯源的综合抽放方法。
- She and I can't live under the same roof. 她和我不能住在一起。
- The control techiique of false roof in recovery working face 回采工作面伪顶控制技术
- The false alibi threw the police off the scent. 那个不在犯罪现场的伪证使警方失去了线索。
- An unwanted false electronic pulse. 一种不希望有的假电子脉冲。
- She deluded herself with false hopes. 她以虚幻的希望欺骗自己。
- The article has too many false presumptions. 这篇文章中凭空臆测的东西太多。
- Gas Management Technology of Roof Rock Boreholes 顶板岩石钻孔抽放治理瓦斯技术
- displacement pressure of roof rock 盖层排驱
