rock sand

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。

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The usual way to reclaim land is to pile sand rock on to the seabed.

通常的方法去开垦陆地是在海床上堆起沙石.

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Massive, granite rock formation s overlook beautiful, white-sand beaches.

庞大的花岗岩层俯瞰美丽的白沙滩.

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According to the nature, Guangxi Limestone is separated into three types: pure limestone, siliceous limestone, mixed sand shale or limestone of igneous rock.

广西的石灰岩按性质可分为纯质石灰岩、夹硅质石灰岩、夹砂页岩或火成岩的石灰岩三种类型。

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On the basis of erosion wear theory of materials and the abrasive water jet cutting process, the mechanisms of both casing cutting and formation rock cutting with hydraulic sand blasting perforation of oil wells are discussed, and the influencing parameters are investigated.

根据材料冲蚀磨损理论和磨料射流切割原理，对利用水力喷砂射孔技术切割套管和近井地层岩石的机理及其影响因素进行了分析。

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The foolish man built his house upon sand; the wise man built his house on a rock.

愚蠢的人将房子建造在沙子上，明智的人将房子建在石头上。

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Sinter between two contacting surfaces of rock sand earthquake mechanism in deep earth crust

接触岩面烧结与地壳深部地震机制

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The existence of vast area of tight sand rock, low permeability of sand rock and plenteous gas supply are all favorable conditions for the formation of deep basin gas traps.

大面积致密砂岩的存在、砂岩的低渗透性以及充足的天然气供应都是形成深盆气藏的有利条件。

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The characteristic of the white-sand rock is between the hard soil and soft rock.

白砂岩的性状是介于硬土与软岩之间,被扰动后呈松散状.

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Effects of Sand Percentage and Proportion of Crushed Rock Fine to Sand on Properties of High Strength Pump Concrete

砂率及特细砂与鱼米石比例对高强泵送混凝土性能的影响

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The South China Sea Islands are made up of the East Sand Islands, West Sand Islands, Middle Sand Islands, South Sand Islands and Yellow Rock Island.

南海诸岛由东沙群岛、西沙群岛、中沙群岛、南沙群岛及黄岩岛组成。

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