提高大扭矩旋挖钻机用螺旋钻头安全性的分析及措施          下载免费PDF全文

黄玉文  翁炜  冯美贵 《探矿工程》2011,38(11):42-43,47

通过对旋挖钻机用螺旋钻头的模拟分析和失效形式研究,探讨了螺旋钻头的结构、材料和加工工艺,采用安全钢丝绳结构,提高了大扭矩旋挖钻机用螺旋钻头的强度和安全系数。同时介绍了钻头制造和使用过程中的注意事项。  相似文献   

刘长营环境科学钻探取样技术研究   总被引：1，自引：0，他引：1       下载免费PDF全文

赵洪波  李国民  刘宝林  王建强 《探矿工程》2011,38(11):14-17

针对环境取样的高取心率要求,利用SDR-100型全液压声频振动钻机结合压卡式钻具,完成了刘长营环境科学钻探取样。主要介绍了钻进工艺以及取样过程中遇到的问题,并给出了解决方案,最后对环境取样技术进行了展望。  相似文献   

煤田钻探深水位钻孔施工体会          下载免费PDF全文

程兆洪 《探矿工程》2011,38(11):24-26,31

通过管外注水、调整泥浆添加剂及其它措施,解决煤田钻探深水位钻孔钻杆润滑和冷却以及烧钻等问题,取得成功的经验。解读钻探施工常规方法的适用性和遇到特殊情况的应变和突破思维以及由此带来的体会和启示。  相似文献   

RD20Ⅱ型钻机及空气潜孔锤钻进施工中若干问题探讨          下载免费PDF全文

董润平  胡忠义 《探矿工程》2011,38(12):50-53

采用RD20Ⅱ型钻机及空气潜孔锤钻进工艺,有效地解决了大口径煤层气孔、矿井通风孔、电缆孔及水源井等钻探施工中硬岩钻进效率低,干旱缺水地区钻探成本高,地层遇水易坍塌、缩径等问题。在介绍了RD20Ⅱ型钻机和QL系列潜孔锤结构特点的基础上,总结了在空气潜孔锤钻进中的一些问题及解决思路和措施。  相似文献   

新疆哈密白山钼矿深孔钻探施工工艺          下载免费PDF全文

马德义  贾宏福  廖志新  付兆友  盖志鹏 《探矿工程》2011,38(5):28-31

介绍了新疆哈密白山钼矿深孔钻探施工工艺。就深孔施工的一些关键问题,如钻孔结构,设备选型,钻头选择,冲洗液选用与维护,深孔防斜等进行了探讨。  相似文献   

利用泥芯示踪九连墩楚墓青铜器的产地          下载免费PDF全文

魏国锋  秦颍  姚政权  王昌燧  胡雅丽  黄凤春 《岩石矿物学杂志》2011,30(4):701-715

探讨了利用青铜器内残留的陶范或泥芯示踪青铜器产地的可行性。采用偏光显微镜、XRD、XRF、NAA等技术手段,测试分析了湖北九连墩楚墓青铜器内的泥芯,发现九连墩外来风格青铜器的泥芯,在物相、微观结构、化学成分、植硅体组合等方面与本地风格青铜器的泥芯有较大差异。外来风格青铜器的泥芯,其CaO含量很高,达6%以上,而Na2O的含量相对较低,这一富钙、贫钠的特点,与中国黄土的典型特征极为吻合。结合泥芯中的植硅体组合特征,推测九连墩外来风格的青铜器很可能来自中国北方黄土堆积地区,系当地铸造后输入到楚国的。本研究表明利用青铜器内的泥芯或陶范残留,可望有效地示踪青铜器的产地。  相似文献   

长江口柱状沉积物中氮的形态特征研究   总被引：1，自引：0，他引：1  

王益鸣  吴烨飞  王键  郑爱榕 《海洋学研究》2011,(3):194-201

研究分析了长江口柱状沉积物中氮的赋存形态,并结合沉积速率和有机碳含量分析了氮的迁移转化特征和有机质来源.研究结果表明,有机物与硫化物结合态氮(OSF-N)是柱状样可转化形态氮中的主要赋存形态,碳酸盐结合态氮(CF-N)含量最低;位于长江口122°E附近测点的各形态氮的垂直分布与122.6°E附近测点的差异明显,受水动力...  相似文献   

青藏高原南部枪勇错冰前湖泊沉积记录的近千年来冰川与气候变化   总被引：4，自引：0，他引：4  

李久乐  徐柏青  林树标  高少鹏 《地球科学与环境学报》2011,33(4):402-411

以钻取自青藏高原南部大枪勇错冰前湖中的1.06 m湖芯为研究对象,对沉积物样品进行了粒度、磁化率、元素含量、碳酸盐和总有机碳含量等多项指标的分析测定;在明确了沉积物来源的基础上,分析讨论了各指标变化的影响因素及其具体气候环境指示意义;结合沉积序列放射性同位素定年结果,对湖芯中各指标进行了综合对比分析,恢复了青藏高原南部...  相似文献   

FEM simulation of formation of metamorphic core complex with ANSYS software     

References： 《东北亚地学研究》2007,10(1):110-112

This study utilizes ANSYS to establish FEM＇s model of metamorphic core complex, and used thermal-structure analysis to simulate metamorphic core complex＇s temperature field and stress field. The meta- morphic core complex formation mechanism is discussed. The simulation results show that the temperature field change appearing as the earth surface＇ s temperature is the lowest, and the temperature of metamorphic core complex＇ s nucleus is the highest. The temperature field is higher along with depth increase, and the stress field change appearing as the biggest stress occurs in the nucleus. The next stress field occurs at the top of the cover.  相似文献   

Solar System Processes Underlying Planetary Formation, Geodynamics, and the Georeactor     

J. Marvin Herndon 《Earth, Moon, and Planets》2006,99(1-4):53-89

Only three processes, operant during the formation of the Solar System, are responsible for the diversity of matter in the Solar System and are directly responsible for planetary internal-structures, including planetocentric nuclear fission reactors, and for dynamical processes, including and especially, geodynamics. These processes are: (i) Low-pressure, low-temperature condensation from solar matter in the remote reaches of the Solar System or in the interstellar medium; (ii) High-pressure, high-temperature condensation from solar matter associated with planetary-formation by raining out from the interiors of giant-gaseous protoplanets, and; (iii) Stripping of the primordial volatile components from the inner portion of the Solar System by super-intense solar wind associated with T-Tauri phase mass-ejections, presumably during the thermonuclear ignition of the Sun. As described herein, these processes lead logically, in a causally related manner, to a coherent vision of planetary formation with profound implications including, but not limited to, (a) Earth formation as a giant gaseous Jupiter-like planet with vast amounts of stored energy of protoplanetary compression in its rock-plus-alloy kernel; (b) Removal of approximately 300 Earth-masses of primordial volatile gases from the Earth, which began Earth’s decompression process, making available the stored energy of protoplanetary compression for driving geodynamic processes, which I have described by the new whole-Earth decompression dynamics and which is responsible for emplacing heat at the mantle-crust-interface at the base of the crust through the process I have described, called mantle decompression thermal-tsunami; and, (c) Uranium accumulations at the planetary centers capable of self-sustained nuclear fission chain reactions.  相似文献