坑道无线电透视的影响因素

介绍了无线电波坑道透技术的方法原理；对煤矿上影响坑道透视效果的因素进行了分析，并提出了解决方法。     

坑道无线电波透视层析成像中数字模型的设计与特征处理

本文介绍了用于坑道无线电波透视层析成像处理中数字模型的设计,用层析成像特殊算法（平行相关增强、斜交相关增强、异常增强）分别对精确和含噪声的数字模型数据进行了层板处理,并对特殊算法进行了评价。     

无线电波坑道透视法在煤矿井下水力压裂效果评价中的应用

文中阐述了无线电波坑道透视法评价水力压裂效果的原理、方法,提出了面积法定量评价方法.并以重庆松藻煤矿3211S工作面水力压裂前后的无线电波坑道透视探测资料为例,深入开展了压裂前、压裂后的无线电波衰减系数等值线成果图对比分析研究,并采用面积法定量评价了3211S工作面水力压裂效果,经矿方提供的巷道揭露断层地质资料验证了面积法定量评价水压裂效果方法的可靠性、准确性.该评价方法能有效指导二次补充水力压裂孔的合理布置,能优化同煤层的顺层水力压裂施工设计方案,节约大量设计、施工成本,能产生较好的经济和社会效益.无线电波坑道透视法具有物探方法成熟、操作简单、仪器轻便、探测结果精度高等优点,该评价方法值得在煤矿井下回采工作面水力压裂施工中大力推广应用.     

坑道透视中磁偶极发射天线的试验研究

坑道电磁波透视中,用磁偶极发射天线代替电偶极发射天线后,测量工作速度快、效率高,经与电天线作对比观测,其效果几乎与电天线一样,同步及反射观测所获异常明显。试验结果表明,采用磁天线作为发射天线是可行的。     

坑道透视法在石炭井二矿的应用

针对石炭井二矿矿井地质小构造问题,选用矿井坑道透视法探查,取得了好的应用效果。并就应用问题,谈了几点体会。     

电磁波坑道透视探测技术在淮北矿区的应用

电磁波坑道透视探测技术已在淮北矿区应用多年,在回采工作面探测断层、煤层变薄、火成岩等方面取得了很好的效果,对矿区的安全生产起到了预测预报作用。     

无线电波透视法在鹤壁矿区工作面采前探测中的应用

无线电波透视技术是煤矿工作面采前预测的有效物探手段之一。该技术通过在鹤壁矿区的实际应用，在探测工作面内小断层、薄煤带及陷落柱等地质异常方面取得了良好的效果。     

基于专家系统的煤与瓦斯突出预测知识库研究

煤与瓦斯突出预测理论的不完善性以及影响因素之间的复杂关系,用经典的数学理论难以建立精确的预测模型。本文借助专家系统,详细研究了煤与瓦斯突出区域预测知识库的建立方法,并对知识库结构作了概括描述。这为建立煤与瓦斯突出预测专家系统奠定了基础,进一步拓宽了煤与瓦斯突出预测领域的研究。      

基于多Agent的分布式专家系统及其应用

多Agent分布式专家系统(Multi-Agent Distributed Expert System, MADES)是基于网络的、利用类型相同或相关而知识内容不同的专家系统组成的分布式专家系统.分析了基于多Agent的分布式专家系统的结构,将系统中的Agent进行分类和定义为Communication Agent、Actor Agent、Management Agent和Interface Agent 4种.提出了系统中多Agent之间的一种协作策略.并将多Agent分布式专家系统应用到防汛决策支持系统中,能够解决对外界资源占用的矛盾.     

注浆质量声波检测专家系统的研究

注浆技术被广泛应用于岩土工程的各个领域中,并取得了引人瞩目的成就。然而,注浆质量检测的研究,至今尚未取得突破性进展,而注浆质量的检测是保证注浆质量和提高注浆技术水平的关键。为提高注浆质量检测精度和可靠性,本文将人工智能技术和声波测试技术结合起来,应用于注浆质量的检测中,研制了注浆质量声波检测专家系统,并在实验室和现场做了相关的试验。证明了专家系统的可靠性。     

山西省勘测基础数据库的建立

在MAPGIS软件平台上通过二次开发,在1﹕50000地形图基础上建立了山西省全省地质、矿产、水文气象数据库,实现数据输入输出和查询功能,为勘测设计工作提供便捷的数据服务。     

标准贯入试验在苏丹水利大坝勘察中的应用

近两年,我单位在苏丹国先后完成Kajbar,Shrerik、Sabloka,Dal、Dagash,Mograt等水利水电大坝的勘察工作。本文通过6个大坝详细勘察中标准贯入试验的操作工艺应用,以Dagash大坝为例对标准贯入试验进行阐述,并就与国内该试验实际操作存在的差异性进行比较。     

Penetration of molten iron alloy into the lower mantle phase

The core–mantle boundary is the only interface where the metallic core and the silicate mantle interact physically and chemically. Many geophysical anomalies such as low shear velocity and high electrical conductivity have been observed at the bottom of the mantle. Perturbations in the Earth's rotation rate at decadal time periods require the existence of a thin conductive layer with a conductance of 10⁸ S. Substantial additions of molten iron from the outer core into the mantle may produce these geophysical anomalies. Although iron enrichment by penetration has only been observed in (Mg,Fe)O, the second dominant mineral in the lower mantle, the penetration process leading to iron enrichment in the silicate mantle has not been experimentally confirmed. In this study, high-pressure and high-temperature experiments were conducted to investigate the penetration of molten iron alloy into lower mantle phases; postspinel, polycrystalline bridgmanite and polycrystalline (Mg,Fe)O. At the interface between (Mg,Fe)O aggregate and molten iron alloy, liquid metal penetrated the (Mg,Fe)O aggregate along grain boundaries and formed a thin layer containing metal-rich blobs. In contrast, no penetration of molten iron alloy was observed at the interface between molten iron alloy and silicate phases. Penetration of liquid iron alloy into the (Mg,Fe)O aggregate is caused by the capillarity phenomenon or Mullins–Sekerka instability. Neither mechanism occurs at the boundary of pure polycrystalline MgO, indicating that the FeO in (Mg,Fe)O plays an essential role in this phenomenon. Infiltration of molten iron alloy along grain boundaries (capillarity phenomenon) is the dominant process and precedes penetration due to the Mullins–Sekerka instability. The capillarity phenomenon is governed by the balance of forces between surface tension and gravity. In the case where the ultralow velocity zone (ULVZ) with a low shear velocity is composed of Fe-rich (Mg,Fe)O, the maximum penetration distance of molten iron alloy by capillary rise is limited to 20 m. The addition of iron-rich melt to the base of the mantle is therefore unlikely to be the main cause of the high conductance of the CMB region predicted from decadal variation of the length of day. Furthermore, the absence of molten iron alloy penetration into silicate phases does not allow an extensive modification of the chemical composition of the mantle by core–mantle interaction.     

基于地面运动强度及标准贯入试验的上海地区砂土地震液化评价

上海市地处长江三角洲前缘,黄浦江和苏州河交汇区域,特殊的地理环境与沉积环境导致浅部砂层广泛发育。随着城市建设的不断推进,上海城市区域范围的砂土地震液化风险评价成为亟待研究的课题。文章基于上海市工程钻孔数据,结合地震地面运动加速度分布与标准贯入试验,建立区域性地震液化危险性评价模型,对上海市进行了地震液化危险性评价。研究认为当发生50年超越概率10%的地震条件下,上海市陆域面积的66.0%将不会产生地震砂土液化灾害,21.8%的陆域面积仅发生轻微液化,只有崇明、横沙、长兴三岛,黄浦江及苏州河两岸地震液化等级达到中等甚至严重,占全市陆域面积12.3%;50年超越概率2%的地震条件下,随着峰值地面运动加速度整体升高,全市范围内轻微—严重液化区域明显增多,可能发生地震液化的总面积达到全市陆域面积46.25%。上海市存在砂土地震液化的危险性,但是发生概率较低。研究认为,目前的抗震设计规范中上海市的设防烈度偏高,可能导致不必要的建设成本。同时研究中的不同超越概率下的地震液化危险性评价结果为上海市工程建设相关标准的合理化改进的提供了建议和参考。     

系统工程原理在某复杂岩溶渗漏污染治理的应用

岩溶地区固体废物渣库往往因前期防渗工作不到位,导致废液渗漏,污染地下水.而由于岩溶地区特殊的地质特点,不少治理污染的工作时间长久且耗资巨大而成效却不十分明显.本文从系统工程原理观点出发,对某复杂岩溶渗漏污染治理工程进行研究分析,提出有利于工作快速合理开展的相关方法.以期提高治理工作的有效性.     

Constructing criticality by classification: Expert assessments of mineral raw materials

This paper explores the role of expertise, the nature of criticality, and their relationship to securitisation as mineral raw materials are classified. It works with the construction of risk along the liberal logic of security to explore how “key materials” are turned into “critical materials” in the bureaucratic practice of classification: Experts construct material criticality in assessments as they allot information on the materials to the parameters of the assessment framework. In so doing, they ascribe a new set of connotations to the materials, namely supply risk, and their importance to clean energy, legitimizing a criticality discourse.Specifically, the paper introduces a typology delineating the inferences made by the experts from their produced recommendations in the classification of rare earth element criticality. The paper argues that the classification is a specific process of constructing risk. It proposes that the expert bureaucratic practice of classification legitimizes (i) the valorisation that was made in the drafting of the assessment framework for the classification, and (ii) political operationalization when enacted that might have (non-)distributive implications for the allocation of public budget spending.