J_3含水层钻孔单位涌水量换算

本文主要介绍了鹿洼煤矿J3砂砾岩含水层单位涌水量q值换算的步骤、方法及富水性评价结果,同时也希望对其他煤矿在含水层的单位涌水量换算方面起到一点借鉴作用。     

基于GIS的含水层富水性评价及分区

含水层富水性是划分煤矿水文地质类型的主要依据之一,以祁东煤矿为例,选取含水层有效厚度、构造发育密度、钻孔冲洗液消耗量、渗透系数及单位涌水量五个主控因素,引入模糊层次分析法的方法,计算每个主控因素的影响权重;应用ArcGIS的空间分析功能,科学评价含水层富水性,将研究区内含水层分为富水性极弱区、富水性弱区、富水性中等区及富水性强区,为科学合理制定煤矿水害防治方案提供了基础资料和参考依据。     

宁正煤田侏罗系煤层顶板富水性及涌(突)水风险评价

为研究宁正煤田侏罗系煤层顶板含水层的富水性,运用主客观因素综合赋权的方法,选取含水层厚度、粗砂岩含量、冲洗液消耗量、岩芯采取率、砂泥岩互层数、泥岩含量作为富水性评价的指标,对8煤层的顶板富水性进行分析。结果表明：利用模糊层次分析法-熵权法综合赋权得到各项指标的综合权重,结合逼近理想解排序法的基本原理建立了煤层顶板富水性评价模型,南部地区涌水量约为0.2L/S,中部和北部涌水量约为0.27L/S,西北部涌水量约为0.36L/S,西南部涌水量约为0.43L/S,在煤田内涌水量最大。并通过已知涌水点的分布,对所建立的评价模型进行检验,验证了该模型的准确性。宁正煤田8煤层顶板富水性在西部和东部部分地区N703、N109钻孔周边的富水性最强,在南部补406、补601周边的富水性最弱。     

基于改进AHP法和CRITIC法耦合赋权的松散承压含水层富水性评价

文章通过分析华北型煤田——淮北煤田60个第四系松散承压含水层有效抽水试验钻孔数据，选择隔水系数R、水头系数G、含水层厚度S、最厚砂层厚度M、级配系数D、砂泥互层系数P共6个影响因素作为评价指标，基于博弈论将层次分析(Analytic Hierarchy Process, AHP)法和基于指标相关性的指标权重确定(CRiteria Importance Through Intercriteria Correlation, CRITIC)法进行耦合，建立多因素复合的松散承压含水层富水性评价模型，避免AHP法与CRITIC法单独赋权时偏主观或偏客观问题；采用11个抽水试验钻孔数据对该耦合赋权模型进行验证，该模型评价结果的正确率高达90.91%,所选评价指标均可通过普通地质勘探孔数据得到，无需过多开展现场抽水试验与物探工作；将该模型应用于受采动影响的具体工程实例，评价松散承压含水层富水性的时空动态变化，结果较为精准。     

Bayes判别模型在风化基岩富水性预测中的应用

风化基岩含水层是对矿井安全生产构成威胁的主要含水层之一,准确预测其富水性是煤矿水害防治的基础。针对风化基岩富水性预测问题,以张家峁井田为例,在总结风化基岩岩性特征、分布特征和富水性特征的基础上,以风化基岩厚度、风化程度、岩性组合指数、脆塑性岩厚度比和地形地貌作为判别指标,以研究区及其外围29组风化基岩抽水试验数据作为训练及检验样本,建立了风化基岩含水层富水性Bayes判别模型,可对无抽水试验资料区域的风化基岩富水性类型进行预测。研究表明,张家峁井田风化基岩整体富水性较弱,且空间分布不均。在井田中部和西北角局部区域为强富水性,中部大部分区域为中等富水性,东部及东北部区域几乎全为极弱富水性,其余部分为弱富水性。通过与矿井生产过程中井下涌水量观测数据对比,显示所建判别模型具有较高的准确率,表明运用此模型进行风化基岩富水性预测是可行的,为风化基岩含水层的富水性预测提供了一种新方法。     

灰色理论在裂隙含水层富水性评价中的应用

为对裂隙含水层的富水性进行科学合理的评价,以马营堡井田为例,以断层分形维数表征含水层裂隙的发育程度为评价含水层富水性的一项主控因素;在分析确定其它富水性主控因素的基础上,采用加权灰色关联度评价方法,以指标关联度作为因素权重,以方案关联系数作为判断矩阵,加权灰色关联度即可表征含水层富水性强度,建立了富水性强度与地理坐标的对应关系并运用GIS生成富水性分区图.单位涌水量并未作为富水性的一项主控因素,而是作为含水层富水性的实测指标对该法的评价结果进行验证,结果表明:将断层分形研究方法与灰色关联度方法相结合运用于裂隙含水层的富水性评价具有较高的准确性和客观性,可为其它地区特别是水文地质资料较为缺乏地区的富水性评价提供理论参考.     

基于岩性及结构特征的砂岩含水层富水性评价

煤层顶底板砂岩水害是常见的矿井水害类型之一,其影响程度与含水层富水性密切相关。以营盘壕煤矿22采区2煤层为例,分析了顶板砂岩含水层的富水性影响因素,选取了以砂岩等效厚度、砂岩岩性系数、岩芯采取率及砂泥岩层比率等4项指标作为含水层富水性的评价指标,采用熵权系数法、主成分分析法和层次分析法确定各指标的权重,构建富水性预测模型,基于该模型对砂岩含水层的富水性进行评价。结果表明,研究区顶板砂岩含水层富水性具有强、中、弱3个等级的分区,其中直罗组砂岩含水层以弱-中等富水区为主,强富水区零星分布,志丹群砂岩含水层则以中等-强富水区为主,弱富水区零星分布。富水性评价结果与钻孔抽(放)水试验的单位涌水量具有较好的一致性。     

郎溪钒矿区水文地质特征及矿坑涌水量预测

通过水文地质勘查,查明了郎溪钒矿区的含水层及其富水性和地下水的补给、径流、排泄特征,并采用大井法和涌水量与降深关系曲线法两种方法对比计算,对涌水量做出初步预算评价,为施工提供依据。     

瞬变电磁法定量评估河流流域开采区富水性技术

为了查明河流下渗对露井联采采空区和回填区影响的范围及程度,采用瞬变电磁法对鄂尔多斯呼和乌素沟与乌兰木伦河附近井工开采采空区及露天开采回填区进行探测试验,根据距离河流的远近不同从"线、面、体"等角度全方位分析电性响应特征情况,并结合物探区域内钻探抽水试验结果,探讨瞬变电磁法定量探测富水性的可行性。结果表明:瞬变电磁法可精确勘查河流流域露井协采煤矿浅埋深地质异常体(埋深不超过150 m)富水范围及强度,河流附近不含水(或弱含水)采空区高阻特征明显,而河流附近含水回填区低阻特征明显;附近河流对回填区影响较大,横向可达500 m,回填区呈现明显的富水"漏斗",横向影响范围随深度增加缩小,富水强度随深度增加也减弱,基本与露天剥离回填空间范围相吻合,而附近河流对采空区及上部岩层影响较小,横向不超过80 m,纵向主要影响采空区上部含水层,对采空区补给较少,采空区基本不含水(或弱含水);尝试建立钻孔单位涌水量与视电阻率之间的关系式,并用瞬变电磁法定量探测区域单位涌水量从而确定富水性等级。     

兖州矿区下组煤开采底板突水危险性评价

在系统收集兖州矿区各勘探阶段及各生产矿井水文地质资料的基础上,对兖州矿区下组煤底板奥灰含水层的水文地质特征进行了分析.利用单位涌水量资料对奥灰富水性进行了分区,综合考虑奥灰含水层的富水性、水压、隔水层厚度及底板破坏深度等因素,对影响下组煤各煤层开采的底板奥灰突水危险性进行了分区预测,为矿区奥灰水防治提供了依据.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with