Study on the collapsing characteristic of the complex limestone roof
复合石灰岩顶板垮落特性研究
In order to research support technology of gob-side entry retaining under limestone roof,according to the characters of large flap top and slow subsidence for limestone roof,the paper established the roof cutting mechanical model of gob-side entry retaining and designed quantitatively the support parameters for untied roof cutting of anchor and single prop.
为深入研究石灰岩顶板条件下沿空留巷技术,针对石灰岩顶板具有悬顶大和缓慢下沉的特点,建立了沿空留巷切顶力学模型,定量设计了锚索与单体支柱联合切顶支护参数。
Based on the mechanical properties of coal and its roof and floor rock from different area,the mechanics characteristics of main rock types were summarized,and the difference of rock mechanics properties among them was discussed.
基于不同地区煤岩及顶、底板岩石样品的力学性质数据,总结了主要岩石类型的力学性质特征,重点对两者力学性质的差异进行了对比研究,分析了决定岩石力学性质的主要控制因素,如岩性、孔隙特征和含水率。
Control on rock friction sparks and heating-up of sandstone roof in a coal mine
抑制煤矿砂岩顶板岩石摩擦火花和升温
Mechanics characteristics of coal and its roof and floor rock and the effects of hydraulic fracturing on coal reservoir
煤岩与顶底板岩石力学性质及对煤储层压裂的影响
Research on the Mechanism of Roof-floor Shearing Deformation and Breakage in No.1 Coal Mine of Shi Zuishan Deep Weak Rock Roadway;
石嘴山一矿深部软岩巷道顶底板剪切变形破坏机理研究
thin layers of rock used for roofing.
用来盖屋顶的薄岩石层。
sedimentary rocks,eg sandstone,limestone,slate
沉积岩（如砂岩、石灰岩、板岩）.
A high rock or pile of rocks on the top of a hill.
突岩山顶上高耸的一块或一堆岩石
outward-spreading lithospheric plate
向外扩张的岩石圈板块
The cardium sandstone is lithic, being composed of grains of chert, quartz, quartzite, silicified argillite, and other rock fragments.
卡迪砂岩是岩屑砂岩，由燧石，石英、石英岩、硅化泥板岩和其它岩石碎屑颗粒所组成。
Experience in combined supporting for use in large-span underground chamber under soft roof strata
软岩顶板下大断面硐室联合支护经验
Detector of Coal Seam Roof Strata Based on S3C44B0X Framework
基于S3C44B0X构架下的煤层顶板岩层探测器
The top of the rock tapers sharply.
那块岩石的顶端猛然变得异常尖细。
You can see the entire lake from the top of the rock.
从岩石顶上你可以看到湖的全景。
It was said that the bear had laired among the rocks at the top of the valley.
据说那只熊已住进山顶岩石的窝中。
The selecting type of the support and roof control in soft rock coal seam floor
软岩底板煤层支架选型及顶板控制研究
a pencil of soft slate (or soapstone) used for writing on a slate.
用来在石板上书写的软岩（或皂石）铅笔。
flag stone of cement, concrete or artificial stone (excl. agglomerated salte)
石板,水泥、混凝土或人造石料制（不包括凝集板岩）
The roof was slated instead of thatched.
那个屋顶不是用草而是用石板盖的。
Put the slats on the roof so that they lap over.
把石板瓦安放在屋顶上，使之相互叠盖。