镁资源研究与开发述评之一──镁水泥的研究与盐湖的开发   总被引：1，自引：0，他引：1  

王臣松 《盐湖研究》1998,(Z1)

简单概括了镁资源研究开发的状况,评述镁水泥研究的主要理论成果。指出以镁水泥为途径开发盐湖资源的重要性。同时表述了镁水泥研究领域的最新动态,指出当前镁水泥研究需要考虑的几个重大问题。  相似文献   

市场经济体制执行地质勘探规范的有关问题讨论     

殷友东  刘振红 《化工矿产地质》1997,19(2):135-138

市场经济体制下地质勘探工作的资金投入一般要由开采单位负担,而这部分资金属于前期投入,需要贷款来解决,现行的地质勘探规范已难适应地质工作的需要。在有一定工作基础的中小型矿山地质勘探工作中,对矿体的控制、水文地质、矿石可选性试验等工作程度,高级储量比例,勘查周期等方面,宜根据实际情况,合理的加以确定。  相似文献   

硫铅酸盐“S”型瞬凝水泥干法护壁堵漏技术研究          下载免费PDF全文

彭振斌 《探矿工程》1995,(2):41-42,60

介绍了硫铝酸盐“Ｓ”型瞬凝水泥干法者漏时使用的配方,阐述了输送工具和扫孔钻具的设计以及灌注工艺技术。  相似文献   

Marine cements in mid-Tertiary cool-water shelf limestones of New Zealand and southern Australia   总被引：1，自引：0，他引：1  

Campbell S. Nelson  & Noel P. James 《Sedimentology》2000,47(3):609-629

Large areas of southern Australia and New Zealand are covered by mid‐Tertiary limestones formed in cool‐water, shelf environments. The generally destructive character of sea‐floor diagenesis in such settings precludes ubiquitous inorganic precipitation of carbonates, yet these limestones include occasional units with marine cements: (1) within rare in situ biomounds; (2) within some stacked, cross‐bedded sand bodies; (3) at the top of metre‐scale, subtidal, carbonate cycles; and (4) most commonly, associated with certain unconformities. The marine cements are dominated by isopachous rinds of fibrous to bladed spar, interstitial homogeneous micrite and interstitial micropeloidal micrite, often precipitated sequentially in that order. Internal sedimentation of microbioclastic micrite may occur at any stage. The paradox of marine‐cemented limestone units in an overall destructive cool‐water diagenetic regime may be explained by the precipitation of cement as intermediate Mg‐calcite from marine waters undersaturated with respect to aragonite. In some of the marine‐cemented limestones, aragonite biomoulds may include marine cement/sediment internally, suggesting that dissolution of aragonite can at times be wholly marine and not always involve meteoric influences. We suggest that marine cementation occurred preferentially, but not exclusively, during periods of relatively lowered sea level, probably glacio‐eustatically driven in the mid‐Tertiary. At times of reduced sea level, there was a relative increase in both the temperature and the carbonate saturation state of the shelf waters, and the locus of carbonate sedimentation shifted towards formerly deeper shelf sites, which now experienced increased swell wave and/or tidal energy levels, fostering sediment abrasion and reworking, reduced sedimentation rates and freer exchange of sediment pore‐waters. Energy levels were probably also enhanced by increased upwelling of cold, deep waters onto the Southern Ocean margins of the Australasian carbonate platforms, where water‐mass mixing, warming and loss of CO₂ locally maintained critical levels of carbonate saturation for sea‐floor cement precipitation and promoted the phosphate‐glauconite mineralization associated with some of the marine‐cemented limestone units.  相似文献   

CHANNEL EROSION DAMAGES AND PROTECTION MEASURES IN SOUTHEAST ARIZONA     

Fazle KARIM 《国际泥沙研究》1999,(2)

1INTRODUCTIONThesouthwesternregionoftheUnitedStates,includingSoutheastArizona,ischaracterizedbyasemiaridclimatewithhotsummers,mildwinters,andephemeralstreamsdrainingsparselyvegetatedareas.ChannelmorphologyoftheephemeralstreamsinSoutheastArizonaisinfluencedbybothlateralandverticalchannelchangesoccurringduringmajorfloods.Lateralchannelchangesoccurinthreewaysbankerosion,meandermigration,andchannelavulsion.Verticalchannelchangesinclude,beddegradationoraggradation,andmayoccurseparatelyorinco…  相似文献   

塔河3号油田石炭系储层孔隙特征及其影响因素   总被引：2，自引：0，他引：2  

张凤玖  宫继萍  张新海 《新疆地质》1999,(2)

通过对新疆塔河３号油田石炭系储层的压汞、铸体、电镜扫描、孔渗资料进行综合分析认为,该储层的孔隙总体不是很好。储层共分为四类,最好的也只是中孔－中渗－粗喉型。其孔隙较小、喉道连通性较好、喉道分选差、毛管压力无明显平台,影响孔隙的因素是碳酸盐胶结物的含量。  相似文献   

硅质碎屑砂岩中胶结物来源的新认识     

杨香华 《地质科技情报》1993,12(4):34-39

分析了浅埋藏砂岩的成岩环境,并从岩石学、矿物学、同位素及质量平衡估算方面论证硅质碎屑砂岩中的胶结物主要来源于砂岩浅埋藏期间的地下水,进而分析浅埋藏带内地下水的流动机制及早期胶结作用对晚期成岩作用的影响。  相似文献   

航放异常解释用Z量板的水泥模型验证     

戴晓兰  卢存恒 《华东地质学院学报》2001,24(1):34-36

对航放异常矩形反演使用的理论Z量板进行了水泥板模型验证，解决了在航放实测条件下难以验证以及如何消除验证模型对γ射线的等效空气吸收系数与空气本身对γ射线的吸收系数不同的影响等问题。验证结果表明，该量板是正确的，可用的。  相似文献   

××地块水泥土室内配合比试验   总被引：1，自引：0，他引：1  

方忠友 《上海国土资源》2002,(1):34-35

针对目前国内外水泥土强度测定的试验方法,还未形成规范操作的情况下,该文主要从室内试验的角度,阐述了水 泥土试验的目的、试验设备、试样的制备以及试验的方法,从而确定出最佳的水泥掺入比,同时对水泥土与原状土的 物理力学性质以及水泥土的强度增长机理作初步的探讨。  相似文献   

柏井采空区地基注浆加固技术     

张志沛 《水文地质工程地质》1997,24(1):56-58

通过目前国内外现有资料的对比研究，对严重影响石太高速公路修建和运营的柏井采空区采用压力注浆的方法，充填采空区上覆的裂隙冒落带，以达到加固地基的目的。灌注材料选用水泥和粘土，水固比为１：１．５，依据地面构造物不同，在桥涵地段采用１：０．８：０．７（水：水泥：粘土，下同）的配比，在边坡地段采用１：０．５：１的与比，在一般路段采用１：０．３：１的配比，灌注浆液的结石体在采空区及上覆的裂隙冒落带中充填率达  相似文献