基岩水井采用泡沫潜孔锤钻进实践          下载免费PDF全文

韩尚孝  杨晓奇 《探矿工程》2013,40(10):19-22

通过对甘肃肃北七角井铁矿区0310mm口径基岩水井空气泡沫潜孔锤钻进施工,总结验证了空气泡沫潜孔锤钻进施工大口径基岩水井的工艺,提出了不同孔段的钻进技术措施。  相似文献   

舟山海域淡水资源调查岩心钻探技术     

郑荣耀  卢秋平 《探矿工程》2013,40(5):26-30

舟山海域淡水资源调查项目DZS1孔,水深15 m、钻孔深度达202.1 m,在以粘土层和砂层为主的第四系覆盖层全孔取心、在风化基岩层取心2 m。在第四系覆盖层不下套管直接利用φ127 mm钻具进行绳索锤击取心钻探,基岩采用φ127 mm钻具作为套管、φ50 mm钻具单动双管回转取心钻探。介绍了该孔的主要施工工艺与质量控制方法,包括勘探船抛锚定位、潮汛对钻杆的影响、钻探取心过程控制、用取心钻头不取心扫孔技术、更换钻头技术、泥浆工艺等。  相似文献   

AN EVALUATION OF SURFACE HARDNESS OF NATURAL AND MODIFIED ROCKS USING SCHMIDT HAMMER: STUDY FROM NORTHWESTERN HIMALAYA, INDIA     

BY VIKRAM GUPTA  RUCHIKA SHARMA  MADHO PRASAD SAH 《Geografiska Annaler: Series A, Physical Geography》2009,91(3):179-188

Four rock types (quartz mica gneiss, schist, quartzite and calc-silicate) located in the Satluj and Alaknanda valleys were used to test whether a Schmidt hammer can be used to distinguish rock surfaces affected by various natural and man-induced processes like manual smoothing of rock surfaces by grindstone, surface weathering, deep weathering, fluvial polishing and blasting during road construction. Surfaces polished by fluvial process yielded the highest Schmidt hammer rebound (R-) values and the blast-affected surfaces yielded the lowest R-values for the same rock type. Variations in R-value also reflect the degree of weathering of the rock surfaces. It has been further observed that, for all the rock types, the strength of relationship between R-values for the treated surfaces (manual smoothing of rock surface by grindstone) and the unconfined compressive strength (UCS) is higher than for the fresh natural surfaces.  相似文献   

KSC-127型射流式冲击器应用于大陆科学深钻的试验研究   总被引：21，自引：0，他引：21  

朴成哲  殷琨  蒋荣庆  王茂森 《世界地质》2000,19(3):295-298

根据现场试验,评价了ＫＳＣ－１２７冲击器的性能,分析了其对大陆科学深钻的适应性,且对大直径全面破碎冲击回转钻进工艺进行了讨论。  相似文献   

Development and application of simulation technique for hydrokinetic hammer     

Tianye ZHU  Qingyan WANG  Kun YIN  Siyi WANG 《世界地质(英文版)》2007,10(2)

The computer simulation is an important method for hydrokinetic hammer design. Various kinds of simulation measures with their technical characters and applications being taken during the computer aided design are enumerated. Computer simulation supports plenty of valuable references to the designer. Each type of simulation process is used to explore the exact aspect of the performance of hydrokinetic hammer and each type of simulation method has its own excellences and deficiencies. Thus the integrative simulation methods based on modern computational technology are brought forward to obtain the perfect capability of the whole product. Along with the development of computer hardware and software, various kinds of platforms have been provided to different simulation methods that can be carried out with distinct working flows. The jet flow element is the core part of the hydrokinetic hammer. We can build the ideal simulation model of it by means of CFD (computational fluid dynamics) technology. On the other hand, to set up the digital model of piston and hammer, the best way is to build the virtual prototype using automatic dynamic analysis of mechanical system. As a result of the argumentation, we think the technique of Virtual Prototype and CFD are the prime way to process the combined computer simulation for hydrokinetic hammer.  相似文献   

Study on drilling mechanism and optimization of percussion-extruding DTH hammer bit     

LUO Chunhong  ZHENG Zhichuan  CAO Pinlu College of Construction Engineering  Jilin University  Changchun  China 《东北亚地学研究》2009,12(1):36-39

The authors tested the percussion-extruding Down-the-hole （DTH）hammer bit with five different structures and mainly analyzed the drilling mechanism between conical bit and stepped bit. In addition, aiming at ＂the pile effect＂ in combination with the advantage＇ of stepped bit, we design a new cam spinning bit and test it outdoors. The result shows that using cam spinning bit can solve the problem of ＂the pile effect＂, which can also obtain higher drilling efficiency than using conical bit in high confining pressure strata. It is characterized by novel structure and high drilling speed as well as good guiding, and it is significant for improving efficiency in percussion-extruding drilling technique.  相似文献   

潜孔锤偏心跟管钻进法在卵砾石地层岩土工程勘察中的应用     

易军  罗康生  李光俊 《贵州地质》2007,24(3):237-239

卵砾石地层是钻探工程中常见的一种典型的难钻进不稳定地层。通过采用潜孔锤偏心跟管钻进法,从根本上解决了卵砾石地层难以钻进的难题,结合都匀市区岩土工程勘察实例,笔者认为潜孔锤偏心跟管钻进法是在卵砾石地层钻进中行之有效的一种钻进法。  相似文献   

液动螺杆马达与潜孔锤复合钻具的研究     

陈宝义 《吉林大学学报(地球科学版)》1997,(2)

螺杆马达与潜孔锤同属孔底动力机，复合起来难度较大。通过时钻具参数匹配、钻具的连接方式及水功率的消耗等问题的分析，对复合钻具研究的理论方法进行了探讨，提出了适合于科学钻探的复合钻具的两种模式。为进一步研究奠定了基础  相似文献   

Classification of rock weathering at writing-on-stone Provincial Park,Alberta, Canada: A study in applied geomorphology     

Ian A. Campbell 《地球表面变化过程与地形》1991,16(8):701-711

At Writing-On-Stone Provincial Park in southern Alberta, Canada, weathering is causing deterioration and loss of archaeologically important Indian rock art. A procedure devised for the use of park personnel identified four classes of weathering ranging from largely unweathered rock to severely weathered. The technique employed simple visual, qualitative assessment and photo interpretation of 50 sample sections of sandstone cliff face covering a total area of 354 m². Schmidt hammer tests indicated large variations in rock strength and provided a numerical basis for the visual assessment. About 43 per cent of the cliffs are severely to completely weathered, 41 per cent show moderate weathering.  相似文献   

Use of the schmidt test hammer to detect enhanced boulder weathering under late-lying snowpatches     

Colin K. Ballantyne  Nicola M. Black  Donna P. Finlay 《地球表面变化过程与地形》1990,15(5):471-474

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