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   

液动冲击器与液压凿岩机的比较与启示   总被引：2，自引：0，他引：2       下载免费PDF全文

薛军 《探矿工程》1994,(2):39-40

通过时液动冲击器与液压凿岩机的比较，提出了两点看法：（１）液压凿岩机的大液压小流量及高的能量利用系数，对液动冲击器的研制有借鉴作用；（２）水的液体弹簧性质对提高液动冲击器的工作性能具有重要作用。  相似文献   

The usability of bottom ash as an engineering material when amended with different matrices     

《Engineering Geology》2000,56(3-4):293-303

This study aims at investigating the utilization of bottom ash obtained from four different power stations as a construction fill and landfill bottom liner. For the matrix material, commercial powdered bentonite, construction lime and natural clay were used. Compaction tests (Standard Proctor and vibratory hammer) were carried out on the different ratios of bottom ash and matrix material. The optimum water content ranged from 40 to 45% yielding a dry density mostly ca 1 Mg m⁻³. Uniaxial compressive strength of mixtures ranges from 0.1 to 0.5 kgf cm⁻² which showed a 3–20-fold increase when tested on 28-day cured specimens. Triaxial compression tests yield varying rates of shear strength which also showed as high as an 11-fold increase for cured specimens. The hydraulic conductivity of those mixtures was mostly ca 10⁻⁴ cm s⁻¹, which is not considered to be low enough for landfill lining. Leaching tests using deionized water were also performed to investigate the possible effect of leachate produced from the mixtures on the environment. In conclusion a light density and environmentally friendly mixture is determined and proposed as construction filler.  相似文献   

Propagation and attenuation characteristics of various ground vibrations     

Dong-Soo Kim  Jin-Sun Lee   《Soil Dynamics and Earthquake Engineering》2000,19(2)

In order to effectively control vibration related problems, the development of a reliable vibration monitoring system and the proper assessment of attenuation characteristics of various vibrations are essential. Various ground vibrations caused by train loading, blasting, friction pile driving and hydraulic hammer compaction were measured using 3D geophones inside of the borehole as well as on the ground surface, and the propagation and attenuation characteristics of various source generated vibrations were investigated by analyzing particle motions. For the geometric modeling of various vibrations, the types of various sources and their induced waves were characterized and the geometric damping coefficients were determined. The measured attenuation data matched well with the predicted data when using the suggested geometric damping coefficient, and the estimated soil damping ratios were quite reasonable taking soil type of the site and experiencing strain level into consideration.  相似文献   

饱和砂土液化判别方法中问题浅析   总被引：19，自引：3，他引：16  

刘金韬  金晓媚 《工程地质学报》2000,8(3):379-384

国内外各种勘察规范中所判别砂土液化的方法很多,但其效果如何,很维得到难３,笔者利用唐山地震砂土液化资料对几种目前较为常用、有代表性的方法进行了回判分析,指出了这些方法中存在的问题,并阐述了影响液化的主要因素。  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   

FGC－15型大直径单头潜孔锤钻具系统研制          下载免费PDF全文

蒋荣庆  殷琨  王茂森 《探矿工程》1995,(5):17-19,47

大直径单头潜孔锤与三通道气水龙头、主动钻杆、三通道钻杆、加重导正器配套，可实现大直径潜孔锤碎岩钻进、泵吸反循环排渣、泥浆护壁、压气闭路循环等相结合的先进钻进工艺，是解决大直径硬质基岩及卵砾石钻进的有效机具。文中介绍了钻具研制过程及设计内容。  相似文献   

泡沫潜孔锤在水文水井钻探中的应用前景   总被引：3，自引：1，他引：2  

菅志军  崔颖等 《地质与勘探》2001,37(5):77-78

介绍了泡沫潜孔锤的结构及工作原理,阐述了其优点及在水井钻探中的应用前景。  相似文献   

贵州岩溶疏干区浅层地热能地埋管施工技术          下载免费PDF全文

陈浩  赵华宣  贾玉川  曾远明  汤自华  王虎  李勇 《探矿工程》2021,48(3):170-177

贵州省浅层地热能资源丰富,开发潜力巨大,但碳酸盐岩地层分布广、浅表岩溶裂隙极为发育,浅层地埋管施工难度大。以贵州仁怀妇幼保健院浅层地温中央空调地埋管工程为例,采用偏心潜孔锤跟管钻进、潜孔锤钻进、简便除尘器除尘、固结封堵和圆木封隔溶洞、提吊法下管等技术措施,解决了在由于溶蚀和断裂构造及河流深切割作用造成的局部岩溶发育以及地埋管埋置深度内无水的岩溶疏干区进行地埋管施工面临的松散浅表回填及岩溶软弱层成孔困难、全孔段无液面潜孔锤钻进粉尘污染环境、溶洞跑管（PE管）等技术难题,在保证了工程质量、安全的同时提高了施工效率,为类似工程提供了施工经验。  相似文献   

射流式液动冲击器在ZK01-2井提速应用研究          下载免费PDF全文

郭强  翁炜  袁文真  张德龙  杨鹏  张杰丰  陈晓华 《探矿工程》2021,48(10):56-61

在深部地热开采中所钻遇的花岗岩地层,由于其硬度高、研磨性强、致密、可钻性差,致使钻进效率低、钻头消耗大、钻探周期长、成本高等。在“张家口地区地热资源调查评价”项目ZK01-2井施工中,为提高钻探效率,降低钻探周期与成本,采用了射流式液动冲击器配牙轮钻头的钻进方法,在硬岩地层中实现了高效破岩的应用效果。钻进过程中还对排量、钻压、转速等多种钻井工艺参数进行了优化分析,并进行了多次现场试验验证。应用结果表明,硬岩地层在进尺相同的条件下,采用射流式液动冲击器提速钻进比常规普钻效率提高了30%以上,大幅提高了硬岩地层的机械钻速,有效提升了钻探效率,起到了高效破岩的作用,为花岗岩等硬岩地层提速增效提供了重要的技术支撑。  相似文献