锚网喷支护在大雁三矿软岩巷道中的应用

目前锚喷支护已经成为煤矿巷道支护设计首选的支护形式，但是对于软岩巷道应运用软岩支护理论，针对不同类型的软岩，采取不同的设计对策。本文借用大雁三矿在设计中采用先让后抗、柔让适度，适时支护的二次支护原则的实例，阐述膨胀性软岩巷道支护采用锚喷支护的设计方法，并在实践中取得成功。     

基于原岩应力测量的软岩巷道支护优化设计研究

为了解决曹庄煤矿高应力软岩巷道支护困难的问题,进行了井下原岩应力实测,采用基于实测地应力的锚杆支护优化设计方法,优化了巷道支护设计参数。工程实践表明,该支护技术有效控制了高应力软岩巷道围岩变形,取得了良好的技术经济效益,提供了一种控制高应力软岩巷道围岩变形的有效方法,对类似条件下巷道支护设计具有一定借鉴意义。     

软岩巷道变形特性与支护对策

根据软弱岩体的力学特性,对软岩巷道变形破坏的力学机理及支护原理进行了分析,有针对性地提出了控制软岩巷道变形破坏的解决办法和采取的支护措施,以期为布置在软岩中巷道的设计、施工和维护提供借鉴和参考。     

煤矿软岩巷道支护技术

本文主要对煤矿软岩巷道支护技术进行了分析,概述了软岩的概念和分类以及软岩的工程特征,并探讨了煤矿软岩巷道支护存在的问题,最后从三个方面对煤矿软岩巷道支护技术问题进行了研究,具体包括软岩巷道支付的技术关键分析,最佳支护时间分析以及软岩巷道支护的对策。     

大采深集中压力煤柱下运输巷交岔点锚网索喷支护

以峰峰矿务局九龙矿软岩巷道为例，探索大采深、大矿压、大断面软岩巷道的支护方法，利用锚网喷支护加锚索悬吊加固作用设计了支护参数，通过巷道稳定性数据观测，实验取得成功。     

深部软岩巷道锚注联合支护技术研究

基于千米埋深的唐口煤矿巷道围岩矿物成分分析、岩石力学性质试验及地应力测试的结果,提出了采用锚注联合支护方案进行深部高应力膨胀性软岩巷道支护设计。通过FLAC 3D数值模拟,验证支护设计的可行性和优化支护参数;通过矿压监测,评价支护设计的合理性和支护效果。工程实践表明,锚注联合支护技术有效地控制了深部软岩巷道围岩的大变形和底臌,维持了巷道的长期稳定,取得了良好的技术经济效果。     

浅谈软岩巷道锚网喷支护工艺的改进

软岩巷道支护历来是巷道工程的难题,文章通过对锚网喷巷道一次性支护的不足的描述,并通过试验,将展现出二次支护的理念与特点,解决了软岩巷道支护的难题.     

锚注在软岩支护中的应用分析

通过对锚注支护技术在土城矿软岩及顶板极为破碎地带进行试验，对有关矿压指标进行了测量统计，并综合分析，证实了锚注支护在软岩巷道中的有效性和经济性。     

深部高应力软岩巷道联合支护研究

本文针对深部高应力软岩巷道掘进和使用期间出现的巷道变形破坏严重的难题,结合现场施工经验,应用现场试验与数值模拟相结合的研究方法,分析深部高应力软岩巷道变形破坏原因、规律以及提出巷道矿压控制措施,在煤矿试验区选择锚网梁索喷支护方式进行研究,证实此种支护方式为深部高应力软岩巷道合理可行的支护手段,对深部高应力软岩巷道的矿压控制有一定的指导作用。     

软岩大断面交岔点支护与施工技术

针对软岩大断面交岔点支护和施工困难的特殊性,实例分析软岩巷道变形特点,结合软岩巷道锚网、锚注、锚索支护理论,提出了针对软岩大断面交岔点的"三锚"支护设计和反向正台阶法施工技术.承载力验算及现场变形实测结果表明,该支护设计和施工技术可控制软岩大断面交岔点的围岩变形,支护效果良好,具有良好的技术推广价值.     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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