查询词典 rock bottom

Accordingly, mechanism of Gu of research tunnel bottom and measure of its prevention and cure are the main task of timbering of soft rock tunnel all the time.

因此，探究巷道底臌机理及其防治办法一直是软岩巷道支护的重要课题。

Many sparsely disseminated and nodular pyrite can be found in the oil shales. With the oil shale occurring in the bottom, trona, salt, dolomite and silty mud rock also the oil shale make up many sedimentary rhythms.

其内可见大量星点状、结核状黄铁矿，并作为天然碱矿层的直接底板与天然碱、盐岩、白云岩及粉砂质泥岩构成了多个韵律旋回。

The methods of hydrocarbon generation and carbon isotopic kinetics are studied in Sulige Gas Field, Yulin Gas Field and Shenmu Gas Field, which indicate that the gas is mainly from Carboniferous-Permian coaly stratum in the south or southwest of the three gas fields; the hydrocarbon generation of source rock is firstly originated from 150Ma or so in Dingbian and its south area, and is successive from south to north and from west to east; the migration directions of natural gas are regionally from southwest to northeast, and partially from bottom to top.

采用生烃动力学和碳同位素动力学的方法，通过对苏里格气田、榆林气田和神木气田的剖析，认为这3个气田的气源主要来自其南部或西南部的石炭-二叠系的煤系地层；烃源岩生烃始于150Ma左右，出现在定边及以南的气源岩区，并存在由南向北、由西向东推进的趋势；天然气区域运移方向是由西南向东北，局部运移方向是由下向上。

Using FEM, the coupled action of thermal stress and crustal stress has been taken into account. The regularities of distribution of the horizontal displacement of surface of slope and the shear stress of junction plane between shotcrete and rock are discussed too. According to the analysis, under the combined action of thermal stress and crustal stress, top and foot of slope are liable to be destructed. Ordinary, the destructional form of the top is tensile failure and the bottom is shear failure. There are some time effect of displacement and stress in the surface of slope and distribution of temperature in slope, which agrees with actual measured rules.

采用有限元的方法，考虑地应力与温度应力的耦合作用，分析了在一定的边界温度作用下不同时刻边坡喷层面的水平位移，以及喷层与岩层结合面处的剪应力的分布规律；指出在温度应力与地应力的共同作用下，喷混凝土边坡坡顶与坡脚均为容易发生破坏的地方，通常坡顶的破坏型式为拉张破坏而坡脚则为剪切破坏；边坡内的温度分布、边坡表面的位移与应力的变化均存在一定的时间效应，这一规律与实测规律比较吻合。

In order to analyze the influence and damage of the top and bottom of rock mass in floor water-resisting layers due to water pressure in water bearing layer and mining pressure, this paper applies the methods of similar material simulation test and mechanical analysis of floor water invasion in the near of faultage to further comprehend the mechanism of floor water invasion.

为了分析底板含水层水压及采动矿压对底板隔水层岩体上部与下部的影响与破坏，应用了相似材料模拟试验以及断层附近底板突水的力学分析方法，对底板突水机理有了进一步的认识；同时，由断层附近底板突水的力学分析方法所得到的理论计算结果，也可以作为判别类似条件下遇断层时承压水体上采煤是否安全的依据。

The lithologic characters changed from fluviolacustrine sandstone to aeolian Red Clay with thin interval of greyish-white sand layers at the depth of 602 m. It can be inferred from the rock strata and age that the development age of aeolian sequence in Lanzhou area was 7 Ma at least, which is in accordance with the bottom age (7~8 Ma) of the aeolian sequence of the eastern and central Loess Plateau, suggesting that their accumulation processes are unitary.

皋兰山剖面深度602 m处出现由河湖相砂岩向以风成红粘土为主常夹有薄层砂岩的地层转变，通过岩性地层及年代的推断，兰州地区的风尘序列堆积发育的年代至少为7 Ma，与黄土高原风尘序列堆积底界8～7 Ma基本一致，说明了兰州地区与黄土高原在风尘序列堆积过程中具有统一性。

Grand Canyon precipice on the bare rock era of large-span, both formed 20 million years ago schist Vishnu (Vishnu Schist, located in Inner Gorge at the bottom), and 2.3 billion years ago formed the limestone Keba (Kaibab Limestone, located on the shore).

大峡谷崖壁上裸露的岩层年代跨度很大，既有20亿年前形成的毗湿奴片岩（Vishnu Schist，位于 Inner Gorge 底部），又有2.3亿年前形成的凯巴灰岩（Kaibab Limestone，位于岸上）。

The metamorphic rocks of the area consist of granulite, plagioclase-gneis, biotite leptite and various kinds of schists of granulite to amphibolite facies By reconstruction, this metamorphic series is composed of three original formations which inciude five originai rock types: intermediate-acid volcanics formation at the bottom basic-felsic bimodae volcanits formation in the middle and basic-andesitic-felsic volcanics formation at the top...

区内太古代变质岩系广泛发育，其下部为深变质的麻粒岩相地层，上部为中深变质的角闪岩相地层，后者产出红透山式铜锌矿床多处，以及张胡子沟铜矿床和大荒沟硫铁矿床等一系列块状硫化物矿床(图1)。矿石中铅同位素年令为25～26亿年，在形成时代上可以和鞍本地区鞍山群对比。

There are three reservoir and caprock assemblages in Carboniferous system from top to bottom, that is, limy rock member and CI assemblage, middle shale member and CⅡ assemblage, lower shale member and CⅢ assemblage.

塔中4油田最初形成于晚海西期，燕山期又经历了一次重要的成藏过程，喜山期还有一次改造再分配的过程。

The core catcher serves to grip the bottom of the core and, as tension is applied to the drillstring, the rock under the core breaks away from the undrilled formation below it.

岩心爪用于抓住岩心的底端，当施加拉力给钻柱时，使得岩心以下的岩石与下部尚未碑钻进的地层脱离。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。