基于巷道围岩破坏特征的地应力测试结果评价方法

利用数值模拟方法探究了不同地应力状态下巷道围岩的破坏特征,结果表明:巷道轴线与大主应力夹角越小,巷道围岩破坏区越分散;随着夹角的增大,围岩破坏范围逐渐集中,现场表现为围岩破坏具有明显的非对称性。利用数值模拟得到的规律,对淮北矿区海孜煤矿的地应力测试结果进行了分析,结果表明该矿的地应力测试结果是合理的。     

水压致裂法在塔山煤矿巷道围岩地应力测量中的应用

本文介绍了水压致裂法地应力测试的原理及方法,结合塔山煤矿巷道的实际状况作了地应力测试,并进一步论述了矿区内原岩应力场的分布及对巷道稳定性的影响,可供同类工程借鉴。     

东欢坨煤矿深部地应力测试及其对煤击地压的影响

采用声发射法测量技术对东欢坨煤矿深部进行了地应力测试,分析得到了东欢坨煤矿深部地应力的大小和方向,最大水平主应力方向接近垂直方向,最小水平主应力方向接近水平方向,表明矿区深部主要受垂直应力影响,垂直应力是煤层冲击地压发生的诱导因素。     

张家湾出土龙泉古瓷来源的EDXRF分析

为了解北京张家湾出土龙泉古瓷的来源,用能量色散X射线荧光(EDXRF)测试了10个张家湾出土龙泉古瓷的化学组成,并和浙江南宋时期龙泉大窑青瓷、寺龙口越窑仿官瓷数据一起进行模糊聚类分析,结果表明多数张家湾出土龙泉古瓷可能来自于南宋龙泉大窑区,少数张家湾出土龙泉古瓷可能来自于浙江龙泉其他窑区.张家湾出土龙泉古瓷的胎、釉料来源和南宋寺龙口越窑仿官瓷有所不同.     

龙泉煤矿自燃煤层自然发火防治技术

太原煤气化龙泉能源发展有限公司龙泉煤矿初期开采的4号煤层属自燃煤层。借鉴省内类似矿井生产实践经验,总结得出了一套行之有效的自燃煤层自燃灾害防治的安全技术措施,为龙泉煤矿实现高产、高效奠定了基础。     

门头沟煤矿九龙盆地现今构造应力研究

本文介绍了六个孔的地应力测量资料,并详细分析了门头沟煤矿九龙盆区现今构造应力场三维主应力显现特征及对采矿工程的影响。     

西细庄煤矿地应力测量实践研究

西细庄煤矿地应力测量工作选取在1125轨道巷内进行应力实测,分析研究1#煤顶板地应力场状态及对巷道掘进开拓影响。采用钻孔套芯应力解除法进行应力测量,并对应力解除数据、现场率定测试参数及其他有关资料进行了计算和分析。     

贵州省杨柳煤矿煤层气注入/压降测试与分析

基于煤层气注入/压降测试技术对贵州省杨柳煤矿504#工程地质井的4下、5、9号煤层进行了试井测试,测试数据利用SaphirV4.10.06试井分析专用软件进行了分析,求解出的煤层储层参数以及地应力参数合理,为该煤矿的煤层气生产潜能和煤层的开采提供了可靠的参数依据。     

煤矿井下地质构造对地应力分布的影响研究

近几年来,煤矿的开采过程中出现了很多问题,矿难的发生率也在逐年增加,当然这些矿难的发生与人们为谋求利益利益而对煤矿进行违规开采有很大关系,然而最主要的,还是因为煤矿的井下地质构造和相关地应力的分布。为了保证煤矿开采的安全性,我们必须要对煤矿井下的地质结构进行研究,观察其对地应力分布所造成的影响。该文主要是通过对现场地应力的观测分析来研究煤矿井下地质构造对地应力分布的影响。     

漳平煤矿地应力显现与变化规律

本文通过对巷道支架载荷和围岩变形观测数据的统计分析,探讨了漳平煤矿地应力的变化规律。通过分析讨论了矿井支护改革方案,为漳平煤矿控制地应力找出了有效的途径。     

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.     

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.     

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。     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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