共查询到20条相似文献，搜索用时 562 毫秒
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提出了用岩石Ａ、Ｂ值来表示岩石可钻性级别的新观点,研究了岩石Ａ、Ｂ值测定方法和原理;用岩石Ａ、Ｂ值来指导钻头配方设计是可行的。 相似文献
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探讨山谷冰川稳定状态时积累区面积比率，即ＡＡＲ值的大小，认为冰川物质平衡高程分布，平面形态及坡面坡度沿程变化形式是影响山谷冰川稳定态ＡＡＲ值的主要因素，并 山谷冰川稳定态ＡＡＲ值与物质平衡高程分布及平面形态之间的定量关系。山谷冰川适合于应用ＡＲ值法来研究古冰川的零平衡线高程。 相似文献
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MT二维正演的混合剖分算法及其在线源CSAMT正演计算中的应用 总被引：1，自引：1，他引：1
在矩形有限元和三角形有限元方法大地电磁测深（ＭＴ）二维正演计算的基础上，设计了矩形单元粗剖分、程序自动进行三角形单元细剖分的混合剖分算法程序，使得ＭＴ二维模型正演的计算速度大为提高。该方法同时被应用于线电流源变频电磁测深（ＣＳＡＭＴ）ＴＥ极化方式的二维正演计算。文章给出了在不同模型上计算的ＭＴ和线源ＣＳＡＭＴ的响应，分析了计算ＣＳＡＭＴ响应时，计算点离源的距离对视电阻率和相位值计算的影响，比较了ＭＴ和ＣＳＡＭＴ网格剖分的特点，提出了计算ＣＳＡＭＴ响应的改进的边界条件设计 相似文献
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油气储层岩石在不同状况下所测定的电阻率值是地球物理测井解释的重要依据。文章全面地介绍了ＡＲＳ－３００＾ＴＭ电阻率测试系统的结构组成及其相应的用途和测定时的精度保证;对仪器设计的局限性进行了讨论并首次提出了仪器的改进设计。实际应用证明,改进后的ＡＲＳ－３００＾ＴＭ电阻率测试系统测定资料准确可靠,更符合地层的实际情况。 相似文献
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用解析信号计算倾角异常 总被引：1，自引：0，他引：1
秦葆瑚 《物探化探计算技术》1998,20(3):261-266
本文论述了二度磁界面上用倾角法和对解析信号异常（以下简称ＡＳ异常）求倾角值以及（ＡＳ）ｚ／（ＡＳ）ｘｙ多参量等三种方法确定界面的优劣,进而在较复杂的模型上做进一步试算,最后通过湖南一个岩筒上的实例,表明用ＡＳ异常作倾角值的计算有较大推广价值。 相似文献
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预应力锚索在边坡加固工程中的应用 总被引：1，自引：0，他引：1
黄经秋 《有色金属矿产与勘查》1997,6(2):113-116
介绍使用预应力锚索加固大型边坡工程的实例，加固施工采用由瑞典Ａｔｌａｓ公司Ｍａｓｔａｎｇ Ａ－６６全自动、全方位，全液压钻机，干法造孔钻时时效达到百米，有效地控制了施工中孔壁坍塌和边坡失稳，钻孔的偏斜度低于３％，保证了锚固应力达到设计要求的最大值。 相似文献
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本区金矿中黄铁矿的Ｍｏ谱测试和综合分析表明，主要穆斯堡尔参数的变化与含金性之间存在有一定的关系。主要表现为，黄铁矿的Ｉ．Ｓ．值与含金性间呈明显的负相关。Ｏ．Ｓ．值与含金性间则呈明显的正相关，且Ｏ．Ｓ．值随着（Ａｕ＋Ａｓ）／（Ｃｏ＋Ｎｉ）原子数比值的增大而增大。这是由于Ａｕ＋取代Ｆｅ２＋进入黄铁矿晶格使其结构产生畸变所致。置换时电荷补偿可通过两个途径来实现，其一是Ａｕ＋（Ｃｏ３＋、Ｎｉ３＋）→２Ｆｅ２＋，其二是Ａｓ３＋＋Ａｕ＋→２Ｆｅ２＋。 相似文献
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根据１：５０万《河南省地球化学图说明书》的资料,用元素背景值,浓集比率（Ｋ）、叠加系数（Ｋ０）、叠中强度（Ｄ）等判别参数,对河南省太古界水系沉积物地球化学特征作了粗浅研究：太古界的元素背景值与克拉克值相比,Ａｕ、Ｃｕ、Ｍｏ、Ｎｉ偏低,而Ｂｉ、Ａｓ明显偏高,太华群中Ａｕ、Ａｇ、Ｃｕ、Ｐｂ等元素后生叠加、分异作物特强。太古界是本省主要矿源层和赋矿层位。 相似文献
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论利用牙形石色变度值研究碳酸盐岩低级—极低级变质作用 总被引：4，自引：0，他引：4
牙形石色变度－ＣＡＩ值是一项有效的古地温指标，它不便可能帮助确定低级－极低级变岩酸盐岩的最高变质温度，而且可以差别变质类型。本文在介绍牙形石ＣＡＩ值研究现状及低级－极低级变质作用研究现状的基础上，对运用ＣＡＩ值进行低级－极低级碳酸盐岩的研究进行了综述及探讨。 相似文献
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花岗岩岩石中矿物的成分、结构、构造类型和矿物力学性质是制约岩石可锯性的主要因素。花岗岩岩石中石英矿物多（岩石偏酸性）、颗粒结晶粗大，矿物裂理和解理发育差，岩石呈致密块状构造，则可锯性差，反之则可锯性好。并以四川红系列花岗岩石材加工为例，说明了花岗岩岩相学特征对岩石可锯性影响的程度。从而，为花岗岩石材开发过程中，如何选择金刚石锯片提供科学参考资料 相似文献
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Mohammad Ataei Reza Mikaiel Farhang Sereshki Narges Ghaysari 《Arabian Journal of Geosciences》2012,5(6):1289-1295
Performance prediction of diamond wire saws is important in the cost estimation and the planning of the stone quarries. An accurate estimation of sawability helps to make the planning of the rock cutting projects more efficient. In this paper, the performance prediction of diamond wire saws in cutting carbonate rocks was studied on 14 different carbonate rocks in stone quarries located in Iran. Rock samples were collected from the quarries for laboratory tests. Uniaxial compressive strength, Brazilian tensile strength, Schmidt hammer value, and Los Angeles abrasion were determined in the laboratory. Performance prediction was evaluated using simple and multiple regression analyses. Finally, a new model was proposed for predicting the production rate of diamond wire saw. It was concluded that the production rate of carbonate rock using diamond wire saw can reliably be estimated using the developed model. 相似文献
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S. Najmedin Almasi Raheb Bagherpour Reza Mikaeil Yilmaz Ozcelik Hamid Kalhori 《Geotechnical and Geological Engineering》2017,35(4):1311-1326
One of the key parameters that affect the selection of equipment and the cost estimation of dimension stone quarries is the rock cutting rate or production rate. In this study, the M5P tree algorithm is used to determine the relationship between the hard rock sawability and its factors especially the physical and mechanical characteristics of rock. To achieve the research goal, a variety of eleven types of hard dimension stone were selected and nine major physical and mechanical characteristics of rock including uniaxial compressive strength, Young’s modulus, Brazilian tensile strength, equivalent quarts content, grain size, Mohs hardness, point load test, density and P-wave velocity of these samples were evaluated. The cutting rate of diamond wire for all of the Workpiece was measured at different pullback amperage with a fully instrumented cutting platform in laboratory. All operational parameters of cutting process were entirely controlled. Thus, a database containing 99 datasets was provided and it has been used for analyses. The obtained results from the pruned and unpruned tree models showed a significant relationship between cutting rate and its factors. In the end, the results of M5P tree method were compared with statistical analyses (i.e., linear and nonlinear regression). The coefficient of determination be equal with 0.92, 0.86, 0.77 and 0.63 for unpruned tree, pruned tree, linear and nonlinear regression method respectively. This comparison showed that the both method of M5P tree technique have a better performance in predicting the cutting rate rather than the statistical regression methods. 相似文献
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Performance Prediction of Large-Diameter Circular Saws Based on Surface Hardness Tests for Mugla (Turkey) Marbles 总被引：1，自引：0，他引：1
Avni Güney 《Rock Mechanics and Rock Engineering》2011,44(3):357-366
Surface hardness tests such as Shore hardness (SH) and Schmidt hammer rebound hardness (SR) may provide a quick and inexpensive
measure of rock hardness, which may be widely used for estimating the mechanical properties of rock material such as strength,
sawability, drillability and cuttability. In the marble industry, circular sawing with diamond sawblades constitutes a major
cost in the processing. Therefore, several models based on the relations between hourly slab production (P
hs), rock surface hardness (SH and SR) and mineral grain size (S
cr) were developed using the data obtained from field and laboratory measurements on five different marbles quarried in the
Mugla Province of Turkey. The models which include surface hardness and crystal size may as well be used for the prediction
of sawability (hourly slab production) of carbonate rocks using large-diameter circular saws. 相似文献
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介绍了建筑用石材质量检测的相关规范、内容及检测方法,总结了超声技术应用在石材检测中的经验,讨论了石材质量与超声波的波速、振幅的关系. 相似文献
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碎石桩复合地基的抗液化特性探讨 总被引：8，自引：2，他引：6
饱和砂土地震液化问题是岩土地震工程中一个重要的研究课题。在多种可行的防治液化措施中 ,最普遍的方法是采用碎石桩复合地基。本文结合目前国内外碎石桩复合地基的抗液化研究的最新进展 ,对碎石桩的密实、排水减压和减震作用做了较详细的评述 ,最后还提出碎石桩复合地基抗液化特性需要进一步研究的问题 相似文献