兄弟期刊摘登

*中深孔多排同段爆破* 本文系统地介绍了中深孔多排同段爆破的爆破方案和实例,探讨了同段爆破的技术参数和爆破机理,通过对多排(多眼)同段爆破与逐排(逐眼)爆破的技术经济指标对比,对同段爆破技术进行了评价,确认该项爆破技术兼有挤压爆破与微差爆破之优,是一种新的爆破方法。它与其他各种爆破方法相比,有五条优     

控制爆破技术研究现状及发展建议

综述了控制爆破技术的研究进展,其中包括松动爆破、微差挤压爆破、间隔装药爆破、光面（预裂）爆破、定向断裂爆破、护壁爆破、小抵抗线大孔距爆破、孔底起爆爆破、复合装药爆破、静态爆破等,并提出今后控制爆破技术发展的建议。此综述为进一步探求更加安全、高效、经济、环保的控制爆破技术打下了基础。     

井下中深孔大爆破实践

研究了爆破机理，爆破参数及爆破施工工艺的组织与实施，分析了爆破效果，总结了大爆破实践中的经验。     

不同爆破方式下爆破振动传播规律及预测研究

结合爆破振动测试,通过现场爆破试验,分别获得的金堆城露天矿在常规生产爆破、空气间隔装药爆破、数码电子雷管精确延时爆破、140 mm孔径爆破条件下爆破地震波传播规律;确定了不同减震方法的适用范围,编制了爆破振动预测及减震爆破方法选择软件。现场应用表明,研究成果确保了东川河隧洞的安全运行。     

气体间隔器在广西大新锰矿爆破工艺中的应用

为优化露天中深孔松动爆破方法,广西大新锰矿引进了爆破气体间隔器,对爆破工艺进行分段装药,使炸药的爆破能量得到有效利用,降低爆破大块率,减少爆破根底,直接降低爆破工艺成本及间接降低采装成本,起到了良好的爆破效果。     

中国工程爆破发展现状与展望

文章从硐室爆破技术、深孔爆破、拆除爆破、爆破器材、安全技术等七个方面论述了中国工程爆破科技发展的主要成就 ;阐述了中国工程爆破科技发展进入新阶段的主要特点及面临的机遇与挑战 ;分析了中国工程爆破科技的发展方向及战略调整重点     

影响光面爆破效果的因素分析

对光面爆破原理和影响因素进行了分析,介绍了光面爆破的方法、光面爆破参数的选择和光面爆破的优点,说明了采用光面爆破的必要性.     

矿山爆破振动与控制技术和降震措施

分析了矿山爆破工程中爆破振动产生的原因、爆破地震波的特征及传播规律和影响地震波传播的因素,指出矿山在爆破施工中为爆破振动强度,控制和预防爆破地震效应,应选取合理的爆破参数,充分利用微差技术,改善爆破条件等。     

光面爆破在云鹏电站坝肩开挖中的应用

在云鹏电站大坝工程坝肩施工中采用了梯段爆破及光面爆破，并取得了预期的效果。本文着重介绍了光面爆破在软岩中的爆破参数设计，并对爆破效果进行了分析。     

爆破飞石产生的原因及控制措施

针对攀钢石灰石矿采场爆破的复杂环境,爆破飞石对周边建筑物和人畜造成的安全隐患。分析了矿山爆破特定的自然情况,并对爆破飞石产生的原因进行了总结,利用爆破控制技术,结合实际的爆破工作经验,探究了控制爆破飞石的具体措施,并付诸于实践,获得了较好效果,有利于矿山的安全与稳定。     

多桩承台设计新旧规范差异之分析

分析了桩承台设计方面新旧规范设计理论之不同,结果表明新规范较之于旧规范设计理论要先进合理,破坏机理更接近工程实际,计算结果更偏于安全.     

Chaos theory, sensitive dependence, and the logistic equation.

Comments on S. Barton's (see record 1994-27839-001) discussion of nonlinear dynamical systems theory (chaos theory) and argues that it is premature to claim that chaos theory offers a new paradigm for psychology. For most psychologists, who lack the mathematical sophistication to fully apply chaos theory to problems in psychology, this theory will only offer some new conceptual insights. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effect of Fiber Strength and Fiber-Matrix Interface on Crack Bridging in Cement Composites

This article proposes a new theory for predicting the crack-bridging performance of random short fibers involved in cementitious composites. The current theoretical model for estimating crack bridging performance of random short fiber reinforced cement composites under tension is limited to specific constituent properties: friction-dominant fiber-matrix interface and complete fiber pull-out from matrix without rupture. The new theory extends this model by accounting for two often-encountered features in practice: fiber strength reduction and rupture in composites, and chemical bond–dominant fiber-matrix interface. The new theory was verified to capture important characteristics in bridging performance in comparison with composite tensile test data. As a result, the new theory forms an important foundation for developing high-performance random short fiber reinforced cement composites.     

小间距平行顶管管道土压力计算方法研究

小间距顶管过程中,由于管?管相互作用的影响,使得管周土压力分布与单管顶进土压力分布模式产生差异,从而造成小间距顶管荷载确定、结构计算及顶力估算与控制等设计施工难题。结合数值模拟反分析,基于太沙基土压力理论和极限平衡理论,假设了土体松动线和上部既有顶管的支挡作用线,进一步构建了小间距平行顶管管道拱顶垂直土压力的计算方法。基于构建的土压力计算方法,分析了土体抗剪强度、管径、管间距等对新建顶管拱顶土压力的影响,并与不考虑既有顶管影响的土柱理论和太沙基理论计算值进行了对比。计算结果表明:土体抗剪强度越大,新建顶管拱顶垂直土压力越大,而其侧面的土压力越小;抗剪强度较大时,新构建方法计算拱顶土压力小于太沙基理论计算结果,抗剪强度较小时,新构建方法计算拱顶土压力大于太沙基理论计算结果;顶管埋深增加时,新建顶管拱顶土压力增加,相较于土柱理论和太沙基理论,新构建方法计算的新建顶管拱顶土压力增量最小;随着管间距增加,新建顶管拱顶土压力越来越大。      

Practice of Improving Roll Deformation Theory in Strip Rolling Process Based on Boundary Integral Equation Method

Precise strip-shape control theory is significant to improve rolled strip quality, and roll flattening theory is a primary part of the strip-shape theory. To improve the accuracy of roll flattening calculation based on semi-infinite body model, a new and more accurate roll flattening model is proposed in this paper, which is derived based on boundary integral equation method. The displacement fields of the finite length semi-infinite body on left and right sides are simulated by using finite element method (FEM) and displacement decay functions on left and right sides are established. Based on the new roll flattening model, a new 4Hi mill deformation model is established and verified by FEM. The new model is compared with Foppl formula and semi-infinite body model in different strip width, roll shifting value and bending force. The results show that the pressure and flattening between rolls calculated by the new model are more precise than other two models, especially near the two roll barrel edges.     

攀钢热轧板厂一号横飞剪控制策略优化

分析了飞剪的控制原理，发现原来控制策略的缺点，提出新的控制方案并在实际应用中取得较好的效果。     

Editorial.

This issue begins with an invited paper by Ronald Melzack, continuing the "Distinguished Contribution Series" begun in 1990 by my predecessor, Gordon Winocur. Professor Melzack is known world-wide for his research on pain. In 1965, together with Patrick Wall, he proposed the gate control theory, an entirely new conception of pain. For the first time, there was an explicit physiological model emphasizing the role played by the brain as well as by the spinal cord, leading to a new integration of psychological and physiological contributions to pain, as well as to new avenues for the control of pain. This theory has been highly influential, as a quick look in virtually any textbook in biology or medicine will confirm. Professor Melzack's continuing development of his ideas is presented with remarkable clarity in his books and in his many journal articles. It is, therefore, especially exciting for CJEP to be the first to publish a sketch of his new neuromatrix theory. When the book developing this theory is published, it too will no doubt have an immediate and major impact. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A new theory and kinetic modeling of strain-induced precipitation of Nb(CN) in microalloyed austenite

A new theory of strain-induced precipitation of Nb(CN) in microalloyed austenite has been developed by considering the effect of nonequilibrium segregation of Nb on the nucleation and growth of the precipitates. With the aid of the theory, the discrepancy existing between the conventional theory for strain-induced precipitation and experimental data can be reconciled. A kinetic model has been developed based on the new theory. The model is capable of predicting both the Nb(CN) precipitation kinetics and the resulting microstructure in microalloyed austenite. Excellent agreement has been obtained between the model predictions and the experimental observations reported by different investigators.     

éditorial.

This issue begins with an invited paper by Ronald Melzack, continuing the "Distinguished Contribution Series" begun in 1990 by my predecessor, Gordon Winocur. Professor Melzack is known world-wide for his research on pain. In 1965, together with Patrick Wall, he proposed the gate control theory, an entirely new conception of pain. For the first time, there was an explicit physiological model emphasizing the role played by the brain as well as by the spinal cord, leading to a new integration of psychological and physiological contributions to pain, as well as to new avenues for the control of pain. This theory has been highly influential, as a quick look in virtually any textbook in biology or medicine will confirm. Professor Melzack's continuing development of his ideas is presented with remarkable clarity in his books and in his many journal articles. It is, therefore, especially exciting for CJEP to be the first to publish a sketch of his new neuromatrix theory. When the book developing this theory is published, it too will no doubt have an immediate and major impact. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Molecular Mechanism of Granulation. I: H+ Translocation-Dehydration Theory

A new theory for the molecular mechanism of sludge granulation, namely proton translocation-dehydration theory, was proposed in this study. Based on the consideration of biological activity of the bacterial cells, the bacterial surface dehydration caused by proton translocating activity was suggested to initiate the sludge granulation. The overall granulation process in this new theory included four stages: dehydration of bacterial surfaces, embryonic granule formation, granule maturation, and postmaturation. Some phenomena involved in practical sludge granulation were adequately explained by this new theory.