直流电法在探测老窑采空区的应用   总被引：1，自引：1，他引：1  

曾若云  姚建华 《中国煤田地质》2001,13(4):53-54

在各种工程地质、环境地质中、对地下采空区的探测是地球物理勘探的一项重要内容。文章从物性参数研究、技术方法择方面入手，探讨了直流电法探测老窑采空区的可行性，并以实例介绍了解决该问题所取得的经验。  相似文献   

油、水、干层的地球化学识别   总被引：4，自引：0，他引：4       下载免费PDF全文

张枝焕  王铁冠等 《地质论评》2001,47(5):514-520

本文介绍一种判断油、水、干层的地球化学方法，根据储层样品中有机抽提的的含量和组成特征，结合油层物性，地层测试和试油资料编制织识别油、水，干层的图版，提出判别油、水、干层的地质／地球化学指标，确定油层的地球化学参数的下限，并运用此方法对松辽盆地新站油田主要油层分布段的油、水、干层进行判别。根据试油资料验证表明，地球化学判断结果比传统的地质录井及地球物理测井资料判断结果更符合实际情况。  相似文献   

线性石蜡基钻井液的试验研究   总被引：3，自引：0，他引：3  

张琰  任丽荣 《现代地质》2001,15(1):103-107

近期在室内研制成功了新型的第二代合成基钻井液的代表——线性石蜡基钻井液。首先从大量的试验结果中优选出了线性石蜡基钻井液配方 ,在此基础上 ,对线性石蜡基钻井液的性能进行了系统的评价。研究结果表明 ,优选出的线性石蜡基钻井液配方简单。和柴油基钻井液相比 ,线性石蜡基钻井液具有优良的热稳定性、页岩抑制性、润滑性能和储层保护性能 ,可用作深井复杂地层的钻井液  相似文献   

重质碳酸钙表面改性及充填丁苯橡胶试验研究     

杨眉  沈上越  蒋鹏 《矿物岩石》2001,21(4):19-22

重质碳酸钙是一种重要的无机矿物填料，经过表面改性，可以将其由普通填料变成性能优越的功能填料。本次研究选用鄂西优质重质碳酸钙为试验样品，采用干法表面化学改性方法对重质碳酸钙实施了改性，通过测定改性重质碳酸钙的活化率、湿润接触角、固液悬浮体的粘度、白度及表面化学成分对其性能进行考察，并对改性效果进行评价。在丁苯橡胶中的应用试验显示，改性重质碳酸钙充填丁苯橡胶的性能良好，其应用前景广阔。  相似文献   

Thermoelastic model of minerals: application to Al2O3     

J. Hama  K. Suito 《Physics and Chemistry of Minerals》2001,28(4):258-267

 A thermoelastic model for calculating the high-pressure and high-temperature properties of isotropic solids is presented by extending the formalism by Thomsen and combining the resulting one with the Vinet model for static lattice and the Debye model for lattice vibration. Applying it to polycrystalline corundum, we have shown that the calculated values of entropy and heat capacity at constant pressure are in agreement with literature values to 2325 K at zero pressure and that the calculated values of thermal expansivity agree reasonably with experimental data to 1100 K at zero pressure. The model reproduces experimental data of sound velocities v _p and v _s of compressional and shear waves to 1825 K at zero pressure and those to 62 GPa at room temperature, and it reproduces also experimental shock-wave equation of state to 150 GPa. The velocity correlation (∂ln v _s /∂ln v _p ) _S was found to have weak pressure and temperature dependences and the results under lower mantle conditions are compared with those of magnesian and calcium silicate perovskites and magnesiowüstite, and the PREM values of the Earth's lower mantle. Received: 12 February 2000 / Accepted: 15 July 2000  相似文献   

Synchrotron X-ray powder diffraction study of natural P2 /n-omphacites at high-pressure conditions     

A. Pavese  V. Diella  D. Levy  M. Hanfland 《Physics and Chemistry of Minerals》2001,28(1):9-16

 Synchrotron X-ray powder diffraction experiments at high pressure conditions (0.0001–13 GPa) were performed at ESRF (Grenoble-F), on the beamline ID9, to investigate the bulk elastic properties of natural P2/n-omphacites, with quasi-ideal composition. The monoclinic cell parameters a, b, c and β were determined as a function of pressure, and their compressibility coefficients are 0.00277(7), 0.00313(8), 0.00292(5) and 0.00116(4) GPa⁻¹, respectively. The third-order Birch-Murnaghan equation of state was used to interpolate the experimental P−V data, obtaining K ₀=116.6(±2.5) GPa and K′₀=6.03(±0.60). K ₀ was also determined by means of the axial and angular compressibilities [122.5(±1.7) GPa], and of the finite Lagrangian strain theory [121.5(±1.0) GPa]. The discrepancies on K ₀ are discussed in the light of a comparison between techniques to determine the bulk modulus of crystalline materials from static compression diffraction data. Received: 22 February 2000 / Accepted: 10 July 2000  相似文献   

Application of the photoacoustic method for characterization of natural galena (PbS)     

P. M. Nikolić  S. Ðurić  D. M. Todorović  D. Vasiljević-Radović  V. Blagojević  P. Mihajlović  J. Elazar  K. T. Radulović  A. I. Bojičić  D. Urošević 《Physics and Chemistry of Minerals》2001,28(1):44-51

Electron transport properties of single crystal and polycrystalline natural mineral galena (PbS) samples from the Trep?a mine, Yugoslavia, were determined using the photoacoustic frequency transmission technique. Their thermal diffusivity (D _T≈0.16 × 10^?5 m² s^?1), the coefficient of diffusion (D between 0.15×10^?2 0.16×10^?2 m² s^?1) and lifetime of the excess carrier (τ≈35 μs and the front and rear recombination velocity (s _g≈65.5 m s^?1 and s _b≈66.4 m s^?1, respectively), were calculated by comparing the experimental results and the theoretical photoacoustic amplitude and phase signals. The lattice parameter obtained by X-ray work was a?=5.936?Å. The free carrier concentration of these single-crystal samples was measured using the Hall method (N?=?3×10¹⁸ cm^?3). Measurements of the optical reflectivity of the same samples, as a function of wavelength, in the infrared and far infrared ranges, were performed. In the far infrared range a free electron plasma frequency was observed and numerically analyzed, using the least-squares fitting procedure. The values of optical parameters were calculated and the value of the free carrier concentration obtained by the Hall method was confirmed.  相似文献   

Soil Loss by Wind Erosion for Three Different Textured Soils Treated with Polyacrylamide and Crude Oil, Iraq     

Mushtak Talib Jabbar Faculty of Earth Resources  China University of Geosciences  Wuhan 《中国地质大学学报(英文版)》2001,12(2)

ＩＮＴＲＯＤＵＣＴＩＯＮＬａｒｇｅａｒｅａｓｏｆａｒｉｄａｎｄｓｅｍｉａｒｉｄｒｅｇｉｏｎｓｏｆｔｈｅｗｏｒｌｄａｒｅａｆ ｆｅｃｔｅｄｂｙｗｉｎｄｅｒｏｓｉｏｎ .Ａｐｐｒｏｘｉｍａｔｅｌｙ 2 8.4%ｏｆｔｈｉｓａｒｅａａｒｅａｆｆｅｃｔｅｄｂｙｓｅｖｅｒｅａｎｄｖｅｒｙｓｅｖｅｒｅｗｉｎｄｅｒｏｓｉｏｎ (Ｋａｔｅｓｅｔａｌ.,1977) .ＩｎＩｒａｑ ,ｔｈｅａｒｉｄａｎｄｓｅｍｉａｒｉｄｒｅｇｉｏｎｓｒｅｐｒｅｓｅｎｔｎｅａｒｌｙ 75%ｏｆｔｈｅｔｏｔａｌｌａｎｄ .5 0 %ｏｆｔｈｉｓｌａｎｄｉｓｓｕｂｊｅｃ…  相似文献   

VARIABILITY OF AEROSOL OPTICAL PROPERTIES OVER HEFEI DURING SEPTEMBER 1993 TO SEPTEMBER 1994   总被引：7，自引：0，他引：7       下载免费PDF全文

Zhou Jun  Wang Zhi''en  Han Jiecai  Hu Huanling  Li Guojie 《Acta Meteorologica Sinica》1996,10(1):81-95

An 8-wavelength sun-photometer has been operated at Hefei (31.31°N, 117.17°E) to monitoroptical properties of atmospheric aerosols. Altogether 133 solar spectral extinction data were ob-tained on clear days during the period from September 1993 through September 1994, In this pa-per, the feature of the sun-photometer is briefly described. A relative aureole method is intro-duced. which can be used to monitor temporal evolution of aerosol loading during the sun-pho-tometer calibration period. Temporal variabilities of spectral aerosol optical depths and Angstromturbidity parameters are presented. Relation of these variabilities with synoptic and local meteoro-logical conditions are analyzed and discussed, From measured spectral aerosol optical depths undersome representative atmospheric conditions, columnar aerosol size distributions have been retrievedby a linearly constrained inversion method. These typical columnar aerosol size distributions are al-so presented and discussed.  相似文献   

光学转像变倍微分方程的建立及其应用     

林银森  何平安  余模智  林荔 《武汉大学学报(信息科学版)》1996,(4)

建立了光学转像变倍微分方程，并应用于军械瞄准具无焦系统连续变倍过程的分析，给出两个数字例子的高斯光学设计结果  相似文献