alluvium

Research results are as following:the shaft lining is vertically compressed during dewatering aquifer in alluvium,and relative tensile strain is caused by Poisson′s effect.

为掌握冲积层疏排水及注浆加固地层过程中井壁的变形规律,开展井壁变形实测研究,获得如下规律:在冲积层疏排水过程中,井壁竖向受压,竖向压应变随疏水层水压下降而增大,与此同时井壁环向因泊松效应产生相对拉应变;相对于每次注浆前的初始状态,在注浆过程中井壁内缘有两个水平切向受拉区和两个水平切向受压区,受拉区或受压区的圆心角为90°左右,距注浆点最近和最远的两个区域受拉;注浆使井筒周围土层抬升,使井壁在竖向相对受拉,缓释了井壁内的压应力。

The simulation tests were carried out to study the variation of the vertical additional force acted on shaft lining by surrounding soils during dewatering of alluvium by means of multi-function rig in vertical shaft.

利用大型竖井模拟试验台,对冲积层疏排水过程中立井井壁受到的竖直附加力的变化规律开展了模拟试验研究。

The burying characteristic of alluvium in Zhaogu No.

对赵固一矿冲积层埋藏特点进行了分析,采用理论与实践相结合的分析方法,对设计基本参数进行优化,并按强度条件和变形条件设计了冻结壁厚度、安全掘进段高度、冻结孔布置方式和深度。

The application of grouting at pile foundation for soft alluvial layer;

灌浆法在利用软弱冲积层作为人工挖孔桩持力层中的应用

Laplace function method of analysis for ground movements due to mining of phosphate body under thin alluvium;

薄冲积层下磷矿开采地表移动分析的Laplace函数方法

In our country, the thick-alluvium mining areas distribute widely.

我国的厚冲积层矿区分布广泛,通过大量的观测站数据分析及大量厚冲积层矿区地表移动特征研究,系统提出了厚冲积层矿区地表移动参数、规律的特点,并给出了相应的数学计算公式。

This paper based on the thorough understanding and inquisition on the research history and present research conditions of the surface subsidence theories, to take the Geting coal mine as an example, built up the ANSYS number model, get the regulation on the research of the thick-alluvium surface-subsidence.

本文在深入了解与调查地表沉陷理论的研究历史及研究现状的基础上，以葛亭煤矿为例，建立了ANSYS数值模型，对厚冲积层地表沉陷进行了研究，得出了厚冲积层地表沉陷的特有规律。

In our country, the thick-alluvium mining areas distribute widely.

我国的厚冲积层矿区分布广泛,通过大量的观测站数据分析及大量厚冲积层矿区地表移动特征研究,系统提出了厚冲积层矿区地表移动参数、规律的特点,并给出了相应的数学计算公式。

Based on the earthquake acceleration records at deep alluvium sites and rock sites in the Western United States,the attenuation laws of peak ground acceleration at deep alluvium sites and rock sites are obtained respectively,and amplification effects of deep alluvium sites are discussed.

以美国西部地震观测数据资料为基础,分别建立了基岩和深冲积层场地的峰值加速度衰减规律,探讨了深冲积层对基岩峰值加速度的放大作用。

Study on improving upper limit in thick seams slicing mining under thick alluvium;

厚冲积层下厚煤层分层开采提高开采上限的研究

The angle dimension parameters of surface movement,tokens of space shape,are analyzed in this paper based on the observation data of strip mining under thick alluvium and thin bedrock.

基于厚冲积层及薄基岩条件下条带开采观测数据,分析了表征空间形态的地表移动角量参数;优化了常规条带开采采动影响预测的地表移动计算参数;拟合了采用窄工作面计算方法计算的地表移动参数,用于计算非充分宽条带短壁工作面开采地表移动计算。

According to the different properties of rock strata under thick alluvium, the model of hyperbolic function is introduced to predict the surface subsidence through theory analysis.

在厚冲积层条件下, 根据上覆岩层不同的介质特点, 通过理论分析, 采用地表移动变形计算的双曲函数法进行预计, 并对预计结果与实测数据进行了对比, 在预计参数选取比较准确的情况下, 预计结果是令人满意的, 解决了概率积分法在预计厚松散层开采条件下盆地边缘偏差较大的问题。

of or relating to alluvium.

属于或关于冲积层的。

be found in alluvium

在潮湿冲积层中发现

Slow addition to land by deposition of water-borne sediment.

冲积层土地因水流所带的沉淀物冲积而扩大

An increase of land along the shores of a body of water, as by alluvial deposit.

冲积层如因冲积沉淀而使土地近水的地方扩大

Placer mining: Oldest method of recovering gold from alluvial deposits.

砂矿开采:从冲积层回收黄金的最古老方法。

Study of Numerical Simulation and Application on Thick-Alluvium Surface Subsidence;

厚冲积层地表沉陷数值模拟及应用研究

The Influence on Groundwork by Old Disused Watercourse Alluvia Deposit in Xuzhou City;

徐州市古河道冲积层对地基基础的影响

Study on the Interaction between Frozen Soil Wall and Shaft Lining in Deep Alluvium

深厚冲积层冻结壁与井壁相互作用研究

Deep Alluvium Mine Shaft Drilling Construction Method

深厚冲积层煤矿井筒钻井法施工的探讨

Analysis on Measurement of Frozen Pressure in Deep Alluvium in Thousand Metres Vertical Well

千米立井深厚冲积层冻结压力实测分析

Pulsed Laser Deposited GaN Film and the Effect of ZnO Buffer Layer;

脉冲激光沉积GaN薄膜及ZnO缓冲层的影响

Research on Deposition ZnS Buffer Layer by Chemical Solution Methods;

采用液相化学法沉积ZnS缓冲层的研究

Preparation of n-HA/ZrO_2 Composite Coating by Pulsed Electrochemical Deposition

脉冲电化学沉积制备n-HA/ZrO_2复合涂层

Working Group on Stratigraphic Correlation between Sedimentary Basins of the ESC

亚太经委会区域冲积盆地间地层对比工作小组

Working Group for the Stratigraphic Atlas of the Sedimentary Basins of the ESCAP

亚太经委会区域冲积盆地地层地图工作组

Preliminary Study on the Radiolaria from the Surface Sediments in Southern Okinawa Trough

冲绳海槽南部表层沉积物中放射虫的初步研究

STRATIGRAPHIC OIL POOL IN EOGENE SUBAQUEOUS ALLUVIAL FAN IN DONGYING DEPRESSION

东营凹陷下第三系水下冲积扇地层型油藏

Study on Excavation and Retaining and Protecting Designing and Enineering Decision-Making of Alluvium;

冲积地层的开挖与支护设计及工程决策研究