地质勘探金刚石岩心钻探中浅孔主体口径探讨   总被引：1，自引：0，他引：1       下载免费PDF全文

YANG Xiao-qi 《探矿工程》2009,36(11):1-3

针对地质勘探金刚石岩心钻探采用的钻孔口径进行分析,从采心质量满足研究和评价地质矿产的要求、钻探技术经济效益、钻探方法可行性角度,提出在地质勘探金刚石岩心钻探施工中浅孔时主体孔段口径应采用B规格。  相似文献   

峰林平原区定井技术研究——以广西来宾峰林平原区为例     

陈伟海  张之淦 《南方国土资源》2001,14(2):57-62

通过在广西来宾岩溶干旱区的找水实践 ,将峰林平原区定井技术主要归纳为地质构造方法、蓄水构造方法和综合物探方法。地质构造方法可了解断裂富水带的分布规律 ,以指导寻找各种蓄水构造 ;利用蓄水构造方法归纳出该区 7类岩溶蓄水构造 ,并确定其三维几何形状和内部介质特征 ,为水文物探解释提供地质依据 ;水文物探方法可提供富水地质体的定量、半定量信息。文章认为地质—物探—钻探工作密切配合和交流 ,是提高成井率的保证。  相似文献   

Multicomponent observation of crustal activity in the DPRI 800 m borehole close to the Nojima Fault   总被引：1，自引：0，他引：1  

Hiroshi Ishii  Atsushi Mukai  Kunio Fujimori  Shigeru Nakao  Shigeo Matsumoto  Yasuhiro Hirata 《Island Arc》2001,10(3-4):282-287

Abstract An 800 m borehole was drilled near the Nojima Fault, on which a strike–slip larger then 1 m occurred during the 1995 Hyogo-ken Nanbu earthquake ( M = 7.2). Crustal activity near the fault has been observed since May 1996 using a multicomponent instrument installed at the bottom of the borehole. Data of three components of strain, two components of tilt and temperature observed from May 1996 to December 1998 were analyzed. Long-term changes of strain and tilt show a north-east–south-west extension and southwards subsidence. As for the Earth tides and atmospheric effect, orientation of the principal axis of strain was mainly east-west and orientation of the maximum subsidence was mainly north-south. The observational data of strain had variations corresponding to a change in temperature at a depth of 800 m. The thermal expansion coefficient of the crust was calculated to be approximately 2.0 × 10⁻⁶/°K.  相似文献   

数字式全景钻孔摄像系统及应用   总被引：14，自引：3，他引：14  

王川婴  葛修润  白世伟 《岩土力学》2001,22(4):522-525

数字式全景钻孔摄像系统是一套全新的智能型勘探设备，代表了钻孔摄像技术的发展方向，它的关键技术在于全景摄像和数字化技术，其中，全景摄像技术解决了三维图像与其空间坐标的关系；数字化技术解决了图像的形成、处理与还原，地质资料的计算、统计与分析，以及二次开发的能力，通过对其基本原理和应用情况的介绍，反映了该系统的科学性、先进性以及其采样技术的完整性、准确性。  相似文献   

GT－1型工程导向孔多功能无线探测仪和GD－200型钻机在非开挖铺线技术中的应用          下载免费PDF全文

阮学谦  常丰奇  吴毅  贺金岭  薛连宏  彭万利 《探矿工程》1996,(1):33-34,11

介绍ＧＴ－１型工程导向孔多功能无线探测仪的功能、组成参数和ＧＤ－２００型全液压动力头式钻机的组成、性能、主要参数、主要特点以及两者在非开挖铺设管线技术中的配套试验情况。  相似文献   

水平钻孔中电阻率法测煤厚的原理及正演模拟     

韩德品 《煤田地质与勘探》1996,24(6):54-56

论述了顺煤层水平钻孔中电阻率法探测煤层厚度的方法原理，使用线性数字滤波法对不同地电类型做了正演模拟。结果表明，电阻率曲线对煤厚变化反映明显，能探测厚度大于０．８ｍ的煤层。  相似文献   

Shear-wave anisotropy and the stress field from borehole recordings at 2.5 km depth at Cajon Pass     

Yun Liu  Stuart Crampin  Rachael E. Abercrombie 《Geophysical Journal International》1997,129(2):439-449

53 local earthquakes recorded at 2.5 km depth in the Cajon Pass scientific borehole are analysed for shear-wave splitting. The time delays between the split shear waves can be positively identified for 32 of the events. Modelling these observations of polarizations and time delays using genetic algorithms suggests that the anisotropic structure near Cajon Pass has orthorhombic symmetry. The polarization of the shear waves and the inferred strike of the stress-aligned fluid-filled intergranular microcracks and pores suggests that the maximum horizontal compressional stress direction is approximately N13°W. This is consistent with previous results from earthquake source mechanisms and the right-lateral strike-slip motion on the nearby San Andreas Fault, but not with stresses measured within the uppermost 3 km of the borehole. This study suggests that the San Andreas Fault is driven by deeper tectonic stresses and the present understanding of a weak and frictionless San Andreas Fault may need to be modified. The active secondary faulting and folding close to the fault are probably driven by the relatively shallow stress as measured in the 3.5 km deep borehole.  相似文献   

Stress orientations in Brazilian sedimentary basins from breakout analysis: implications for force models in the South American plate   总被引：1，自引：0，他引：1  

Cláudio Lima  Edes Nascimento  Marcelo Assumpção 《Geophysical Journal International》1997,130(1):112-124

  相似文献   

渤海湾海陆交互相沉积的磁性地层学   总被引：23，自引：0，他引：23  

姚政权  郭正堂  陈宇坤  肖国桥  邵永新  王旭龙  郝青振  卢演俦 《海洋地质与第四纪地质》2006,26(1):9-15

渤海湾的海陆交互相沉积对研究海陆环境变化、新构造活动及华北平原的演化历史等均有重要意义,而建立可靠的年代地层框架是上述研究的前提。对取自渤海湾西岸天津市深度为203.57 m的BZ2钻孔进行了详细的磁性地层学研究,结果表明,钻孔岩心包含4个正极性段,分别可与标准极性柱中布容(Brunhes)、贾拉米洛(Jaramillo)、奥尔都维(Olduvai)和高斯(Gauss)正极性世对比;获得的3个负极性段则与松山(Matuyama)和凯纳(Kaena)事件对应,从而获得钻孔岩心底部年龄约为3.18 MaBP。磁性界限之间平均沉积速率的相对一致性,指示了渤海湾在晚上新世以来总体稳定的下沉趋势。  相似文献   

The Seafloor Borehole Array Seismic System (SEABASS) and VLF ambient noise     

R. A. Stephen  D. E. Koelsch  H. Berteaux  A. Bocconcelli  S. Bolmer  J. Cretin  N. Etourmy  A. Fabre  R. Goldsborough  M. Gould  S. Kery  J. Laurent  G. Omnes  K. Peal  S. Swift  R. Turpening  C. Zani 《Marine Geophysical Researches》1994,16(4):243-286

The Seafloor Borehole Array Seismic System (SEABASS) has been developed to measure the pressure and threedimensional particle velocity of the VLF sound field (2–50 Hz) below the seafloor in the deep ocean. The system consists of four three-component borehole seismometers (with an optional hydrophone). a borehole digitizing unit, and a seafloor control and recording package. The system can be deployed using a wireline re-entry capability from a conventional research vessel in Deep Sea Drilling Project (DSDP) and Ocean Drilling Project (ODP) boreholes. Data from below the seafloor are acquired either onboard the research vessel via coaxial tether or remotely on the seafloor in a self-contained package. If necessary the data module from the seafloor package can be released independently and recovered on the surface. This paper describes the engineering specifications of SEABASS, the tests that were carried out, and preliminary results from an actual deep sea deployment. VLF ambient noise levels beneath the seafloor acquired on the Low Frequency Acoustic-Seismic Experiment (LFASE) are within 20 dB of levels from previous seafloor borehole seismic experiments and from land borehole measurements. The ambient noise observed on LFASE decreases by up to 12 dB in the upper 100 m of the seafloor in a sedimentary environment.  相似文献