水压式凿岩破碎冲击器的研究          下载免费PDF全文

杨红东  郑传峰  计胜利  侯传斌 《探矿工程》2010,37(10):74-77

水压式凿岩破碎冲击器与液动冲击器的工作机理有着本质的区别,它有着很高的工作效率和能量转换率,凿岩速度大大高于气动潜孔锤,但这种水压冲击器不适合泥浆驱动。转阀式水压冲击器的配流不同于以往的配流方式,可能更适合泥浆介质驱动。  相似文献   

偏心跟管钻具钻进的仿真分析          下载免费PDF全文

罗宏保  宋军  赵建勤  黄晓铭 《探矿工程》2010,37(11):6-8

针对偏心跟管钻具工作环境与受力作用复杂的情况,通过建立跟管钻具在地层中钻进的有限元模型,设定各种边界条件及载荷,运用有限元分析软件ANSYS 12.0对跟管钻具的钻进工况进行仿真模拟,分析钻具在钻进时与地层岩土体相互作用下的应力应变情况。根据模拟分析结果能够更清楚地了解钻具钻进时的应力状态,并对钻具的设计、优化起到指导性作用以及为钻具设计结构的合理性提供了理论依据。  相似文献   

潜孔锤跟套管技术在挡土墙加固工程中的应用     

计胜利  张勇  张育柏 《世界地质》2001,20(2):206-208

由于地层较为复杂，采用普通潜孔锤钻进方法难以成孔，实践证明，风动潜孔锤跟管进技术是破碎复杂地层中钻进成孔最为有效的方法。下锚结束后，应及时将套管从孔中拔出，单纯依靠钻机自身提引力很难实现，采用潜孔锤向上反击起拔套管，既保护了钻机又节省了起拔套管的时间。  相似文献   

冲击回转碎岩机理试验研究   总被引：2，自引：0，他引：2       下载免费PDF全文

常玉军  殷琨 《探矿工程》2001,(4):62-64

在模拟孔底冲击回转钻进条件的试验台上，对岩石的冲击回转碎岩机理进行了试验研究，提出了大直径潜孔钻头的合理布齿及钻进参数选择依据。  相似文献   

The effect of surface texture on the determination of the surface hardness of rock using the schmidt hammer     

R. B. G. Williams  D. A. Robinson 《地球表面变化过程与地形》1983,8(3):289-292

The Schmidt hammer is employed by geomorphologists as a convenient field instrument for measuring the hardness of rock surfaces. Field trials indicate that the readings obtained are a function of not only the hardness of the surfaces but also their texture. Smooth planar surfaces give much higher readings than rough or irregular surfaces. This makes interpretation of the results particularly difficult when the hammer is used to measure the hardness of natural rock surfaces that have been roughened by weathering.  相似文献   

西部特殊景观区钻探取样技术展示     

王达 《探矿工程》2005,32(1):1-5

针对西部特殊景观区海拔高、地势险峻、地形地质条件复杂、自然条件恶劣、地理位置偏远、交通不便等问题，我国科研人员经过多年努力，开发并完善了一批适合于特殊景观区的钻探技术——空气组合钻探技术、水文水井泡沫增压钻探技术、复杂地层钻探取样新技术、液动潜孔锤钻进技术、特殊地层取样钻机及钻探工艺、节水钻探新技术、新疆吐鲁番铀矿勘探及罗布泊环境科学钻探用取样工艺、西部特殊景观区资源勘查及重大建设工程中地质灾害监测和防治新技术、存储式多点连续测斜仪等，介绍了各项新技术的原理、研究进展及取得的成果。  相似文献   

The influence of rock resistance on coastal morphology around Lord Howe Island,southwest Pacific     

M. E. Dickson  D. M. Kennedy  C. D. Woodroffe 《地球表面变化过程与地形》2004,29(5):629-643

An Erratum has been published for this article in Earth Surface Processes and Landforms 27(7) 2004, 931. Lord Howe Island, in the northern Tasman Sea, is a remnant of a much larger Late Miocene basaltic shield volcano. Much of the island's coastline is exposed to waves that have unlimited fetch, but a marked contrast is provided by a fringing coral reef and lagoon that very effectively attenuate wave energy along a portion of the western coastline. The geology of the island is varied, with hard and resistant basalt lavas, breccias and tuffs of intermediate resistance, and highly erodible eolianites. This variability provides an excellent opportunity to examine the in?uence of rock resistance on the development of the spectacular rock coast landforms that occur around the island. The hardness of rocks and the extent of weathering around the coastline were assessed using a Schmidt hammer, and statistical analysis was undertaken to remove outlying values. On all but one occasion, higher mean rebound values were returned from fresh surfaces than weathered surfaces, but only half of these differences were statistically signi?cant. Shore platforms with two distinct levels are juxtaposed along two stretches of coastline and Schmidt hammer results lend support to hypotheses that the raised surfaces may be inherited features. Relative rock resistance was assessed through a combination of Schmidt hammer data and measurements of joint density, and constrained on the basis of morphological data. This approach formed a basis for examining threshold conditions for sea‐cliff erosion at Lord Howe Island in the context of the distribution of resistant plunging cliffs and erosional shore platforms. Copyright © 2004 John Wiley & Sons, Ltd.  相似文献   

潜孔锤在鄂西找水勘察施工中的应用效果          下载免费PDF全文

黄云龙  申晓彬 《探矿工程》2005,32(7):56-57

为了尽快解决湖北恩施自治州部分乡镇缺水问题，我院连续4年投入少量找水勘察任务，使用空气潜孔锤钻进，取代传统岩心钻探方法，加快了勘察施工速度，积累了经验，为今后使用潜孔锤在基岩地层找水成井施工打下了基础。  相似文献   

贯通式潜孔锤新技术在矿山勘探中的应用试验     

侯传彬  王茂森  计胜利  陈家旺 《世界地质》2006,25(3):309-311,322

针对栾川钼矿复杂地层勘探遇到的技术难题,采用贯通式潜孔锤全孔反循环钻进工艺方法,对钻进中遇到的开孔难、漏失严重、活塞断裂等技术问题,进行了工艺研究、设计方案改进。试验表明,该技术方法具有岩芯(样)采取率高、钻进速度快的特点。  相似文献   

新型高冲击功液动潜孔锤的研究   总被引：2，自引：2，他引：0       下载免费PDF全文

谢文卫  苏长寿  宋爱志 《探矿工程》1998,(6):31-32

介绍了用于全面钻进的ＹＺＸ－１２７型液动潜孔锤的结构特点、性能参数、室内岩样实钻试验效果,展望了其广阔的应用前景。  相似文献