洞庭湖综合治理中根治“地质灾害”的重要性

本文从洞庭湖区环境地质条件入手,分析堤防失事及所存在的险工险段与地质缺陷的关系,指出地质灾害是造成防洪工程失事不可忽视的因素。在洞庭湖区综合治理过程中,应注重对地质缺陷的治理     

江垭库区人潮溪段公路边坡破坏机制及整治措施

通过实地勘察,本文分析了江垭库区人潮溪公路边坡,边坡破坏的形成条件、动态特征以及各类边坡的破坏机制,从而提出以加固临空面和采取排水防水为主的整治措施。     

Arps递减开发模型

本文在Ａｒｐｓ递减产能预测模型的基础上提出了Ａｒｐｓ递减开发模型,提出了开发速度,采出程度等开发指标的数学关系式,分析了参数Ａｒｐｓ递减开发模型的影响,提出了开发初期Ａｒｐｓ递减开发模型的确定方法,便于开发初期决策,制作了Ａｒｐｓ递减开发模型的ｌｏｇＶｄ－ｌｏｇＲｐ图版,ｌｏｇＶｄ－ｌｏｇ（Ｄｔ）图版,ｌｏｇＲｐ－ｌｏｇ（Ｄｔ）图版,提出了开发中晚期Ａｒｐｓ递减开发模型的判断方法,三点抛物线法和三     

中国地球科学发展战略的若干问题--从地学大国走向地学强国

地球科学是中国发展较早的近代科学之一,在２０世纪中华振兴和现代化进程中发挥了重要作用,其进一步发展密切关系到２１世纪中华民族在世界民族之林中的地位,成为决定未来世纪国家综合国力和科学技术水平的重要因素。当前我国正开始踏上实现宏伟的第三步战略目标的征程...     

4-Dimensional Models of Deformation of the Earth's Crust and Earthquake Prediction

Traditionally, when creating 4-D models of elastic offsets in the Earth's crust, the data from geodesic and GPS monitoring of offsets on the ground surface, earthquake catalogs, monitoring of the water level and radon content in wells, sea level fluctuations, as well as gravitational and magnetic fields, etc., can be taken as bases for information. In essence, the reason for creating a 4-D model of slow elastic deformations is to approximate the process by a set of plane deformation solitons (solitary waves). The parameters of a set of deformation solitons are obtained by a two-stage inversion. First, the parameters of the model are determined in a kinematic way by the use of a modified simplification of the method. Then, a calibration of the amplitude characteristics of the model is carried out in terms of elastic dynamic offsets. Taking Ural, Northern Tianshan, Greece, and China as examples, models for these regions are created on the basis of seismological, geodesic, deformation, hydrogeological, and     

Seismotectonic Environment for Zhangbei-Shangyi Earthquake and Characteristics of Macroscopic Damage

The regional seismotectonic environment for the Zhangbei- Shangyi earthquake is described, and in combination with the distribution of macroscopic seismic intensity, source mechanism solution, and interpretation of lineaments on satellite images, the seismogenic structure for the earthquake and possible seismogenic fault are discussed in this paper. It is suggested that the Zhangbei-Shangyi earthquake is a result of the latest movement along the northwestern termination of the Zhangjiakou-Penglai fault zone and we should pay serious attention to the future trend of seismic activity along this fault zone.     

Power Law Distribution of Broadband Radiated Energy for Global Seismicity

The claim that there exists a transition of earthquake energy distribution between small and large earthquakes is checked using broadband radiated energy of earthquakes for global seismicity. Scattering of the relation between the magnitude and the broadband radiated energy makes it necessary to use the energy data directly. Rank-ordering statistics is applied to enhance the resolution in retrieving the power law distribution with undersampled data, namely, a few tens of events. Seen in the perspective of broadband radiated energy with higher resolution, there is no evidence for the kink in the frequency-energy distribution for large and small earthquakes. Instead, a single power law can well explain the data. For earthquakes with energy larger than 10~(14) J, we find that the number N of events with energy E depends on E via N ∝ E-B, with the scaling constant B = 0.64 ± 0.04, corresponding to b = 0.95± 0.06.     

大兴安岭北部森林覆盖区植物化探找矿方法的新思路

大兴安岭北部森林覆盖区内白桦、落叶松分布广泛。以白桦、落叶松作为植物化探的主要研究对象具有可操作性和可推广性.植物的外皮、落叶是植物化探研究的首选.落叶松、白桦树叶的采集时间应在9月份叶落后不久,采样间距可在100~600m之间.松树、白桦树皮的采样时间集中在6月和9月两个阶段,采样间距在10~200m之间,采集的树皮距地约0.2m.建议采用干灰化法,最佳的灰化温度在450℃左右     

实散组合桩承载原理及应用

本文提出了实散组合桩概念,即一根桩由上下两段组成,上段是实体桩,下段是散体桩。这样就克服了散体桩通常桩头承载能力低的缺陷。本文对实散组合桩的受力概念进行了分析研究,给出了其承载力、沉降、临界桩长等计算方法和公式。最后介绍了首次工程实例。