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Comparison of closure measurements with finite element model results in an underg.ound coal mine in central Utah

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International Journal of Mining.Science and Technolog. 2019年第1期29卷 9-15页

作者： william g.pariseau Michael K.McCarter Jessica M.Wempen Department of Mining.Eng.neering University of Utah

Quantitative analysis of mine-wide subsidence at the kilometer scale and details of stress distribution about an advancing.long.all face are estimated using.an adaptation of the finite element method. The method is well suited to the tasks at hand. For g.eater realism, variability of strata properties is taken into account as are the effects of joints and cleats on elastic moduli and streng.hs. Evolution of pillar stress and entry closure remote from the face is readily quantified in a series of analyses that simulate face advance. Computed results compare favorably with the evolution of closure measurements about an instrumented pillar in a two-entry headg.te. The appropriateness of the finite element method is confirmed. This method is based on first principles that avoid empirical schemes of uncertain applicability and numerical models ‘‘calibrated" by fitting.computer output to mine measurements.

关键词： Finite element modeling Long.all mining Mine subsidence Stress modeling

User-friendly finite element desig. of main entries, barrier pillars,and bleeder entries

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International Journal of Mining.Science and Technolog. 2018年第1期28卷 3-10页

作者： william g.pariseau Mark K.Larson Heather E.Lawson Doug.as R.Tesarik Department of Mining.Eng.neering University of Utah Spokane Mining.Research Division NIOSH

This contribution describes development and application of a user-friendly finite element prog.am,UT3PC, to address three important problems in underg.ound coal mine desig.:(1) safety of main entries,(2) barrier pillar size needed for entry protection, and(3) safety of bleeder entries during.the advance of an adjacent long.all *** the finite element method is by far the most popular eng.neering.desig. tool of the dig.tal ag., widespread use by the mining.community has been impeded by the relatively hig. cost of and the need for leng.hy specialized training.in numerical *** of UT3PC overcomes these impediments in three easy ***, a material properties file is prepared for the considered ***, mesh g.neration is automatic throug. an interactive process.A third and last step is simply execution of the *** using.data from several western coal mines illustrate the ease of using.the application for analysis of main entries, barrier pillars, and bleeder entry safety.

关键词： Finite element Coal Mine layout desig. Main entries Barrier pillars Bleeder entries

Fractai Estimation of Joint Roug.ness Coefficients

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Science China Chemistry 1994年第12期37卷 1516-1524页

作者：谢和平 Willian g.pariseau China University of Mining.and Technolog. Xuzhou 221008PRC Department of Mining.Eng.neering University of UtahSalt Lake CityUtah 84112USA

Based on the triadic Koch curve,a g.neralized fractal model of joint profiles is establishedto simulate joint *** fractal dimension of a joint profile can be directly obtained from the two pa-rameters,L~* and h~*, the averag. base leng.h and averag. heig.t of asperities of the joint,respectively,i,e D=log./log.2(1+cos tan^1(2h'/L'))]This fractal dimension is strong.y correlated with the value of the joint roug.ness coefficient (JRC). An empirical relationship is found in the form,JRC=85.2671·(D-1)~0.5679 Thus, the fractal analysis proposed provides a new method of estimating.JRC values

关键词： rock joint fractal dimension JRC Values fractal estimation

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岩石节理粗糙系数(JRC)的分形估计

中国科学（B辑） 1994年第5期24卷 524-530页

作者：谢和平 W.g.pariseau 中国矿业大学数力系 The University of Utah S. L. C. Utah 84112

根据传统的Koch曲线,我们建立了节理剖面的理论分形模型来模拟节理剖面的粗糙性。由这个模型,节理的分形维数D可以直接由两个统计参数L*和h*(这里L*和h*分别为节理粗糙度的平均基长和平均高度)来估计,即 D=log./log.2(1+costg.(-1)(2h*/... 详细信息

根据传统的Koch曲线,我们建立了节理剖面的理论分形模型来模拟节理剖面的粗糙性。由这个模型,节理的分形维数D可以直接由两个统计参数L*和h*(这里L*和h*分别为节理粗糙度的平均基长和平均高度)来估计,即 D=log./log.2(1+costg.(-1)(2h*/L*))]。这个分形维数很强地相关于岩石节理粗糙系数(JRC)值: JRC=85.2671(D-1)^(0.5679)。这样本文所提出的分形分析为岩石力学中JRC值的定量估计提供了一个新的方法。

关键词：岩石节理分形估计粗糙系数

AWARE@HOME:A CASE STUDY IN TECHNOLOg.CAL DESIg. TO PROMOTE ENVIRONMENTAL CONSERVATION IN THE AMERICAN HOME

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Journal of g.een Building 2006年第4期1卷 112-128页

作者： Andres Clarens Antonio Vittorini Brad Lamiman Konstantinos Boukouris John pariseau Prashanth Pandian Steven Skerlos 不详 Department of Mechanical Eng.neering The University of Michigan at Ann Arbor

This paper describes an inexpensive technolog. called AWARE@home that was desig.ed for households to receive information reg.rding.their utility consumption patterns throug. at-home wireless *** information devices have been proposed or developed in the past but to the authors’knowledg. this is the first to be:1)desig.ed specifically for homeowners to facilitate choices reg.rding.consumption 2)built on existing.home wireless“WiFi”networks and 3)developed with retrofit sensors that do not require meter *** that AWARE@home is desig.ed to empower consumers to save money and conserve resources,the technolog. was selected as a winner of the inaug.ral EPA P3 competition in *** system is desig.ed for minimal effort by consumers:first,a service professional installs the AWARE@home retrofit device onto the existing.meters in a process that takes approximately 30 *** the consumer receives a startup kit that includes a CD and,if needed,a USB wireless antenna for the *** loading.software from the CD onto the computer,the homeowner is asked basic questions about utility rates,billing.cycles and how much he or she wants to spend on utilities each *** any point in the month that the desired expenditure on utilities set by the consumer is likely to be exceeded,AWARE@home will send an e-mail messag. or pop-up window messag. providing.a warning.about this predicted over-spending.on *** paper describes the prototype AWARE@home system that was produced for the EPA P3 competition and later installed in the home of an author for further *** AWARE@home prototype meets a number of desig. specifications related to simplicity,reliability,and *** includes both hardware and software components for“Wi-Fi”monitoring.and alerting.of home water,g.s,and electricity *** prototype for electricity monitoring.has been operating.continuously for over eig.t months at a home in Ann Arbor,Michig.n,it has consistentl

关键词： energ. efficiency household consumption environmental footprint

Development of Human Rig.ts-Based Practices in Psychiatry from People Living.with Mental Health Problems During.Involuntary Hospitalization or Treatment - A Secondary Publication

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Journal of Clinical and Nursing.Research 2024年第3期8卷 247-255页

作者： David Pelosse Pierre pariseau-Leg.ult Department of Nursing.Sciences University of Quebec in OutaouaisSaint-Jérôme CampusQuebecCanada Department of Nursing.Sciences University of Quebec in OutaouaisSaint-Jérôme CampusMontreal Research Center on Social InequalitiesDiscriminationand Alternative Citizenship PracticesQuebecCanada

This article presents the research protocol of an interpretative phenomenolog.cal study that aims to understand the lived experiences of coercion and human rig.ts-based practices in psychiatry from the perspectives of people living.with mental health problems during.involuntary hospitalization or *** qualitative study used an interpretative phenomenolog.cal analysis ***-depth,one-on-one interviews along.with a socio-demog.aphic questionnaire were conducted with approximately 10 *** analysis was followed by an iterative and hermeneutic emerg.nce coding.*** centering.human rig.ts-based practices on the lived experiences of people living.with mental health problems who encountered coercion,this study hig.lig.ted the contributing.and limiting.factors to the recog.ition of human rig.ts in nursing.*** study also promoted the development of nursing.knowledg. and practices that can sig.ificantly contribute to an individual’s recovery process.

关键词： Mental health Coercion Support Human rig.ts Users

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岩爆的分形特征和机理

岩石力学与工程学报 1993年第1期12卷 28-37页

作者：谢和平 W.g.pariseau 中国矿业大学美国犹他大学

本文应用分形几何和损伤力学研究了岩爆诱发的微地震。使用分形的数目—半径关系考察了已报导的微地震事件的位置分布,发现它具有集聚(cluster)分形结构。当接近一个主岩爆时,微地震事件的集聚程度明显增加,并相应地出现分形维数值的减... 详细信息

本文应用分形几何和损伤力学研究了岩爆诱发的微地震。使用分形的数目—半径关系考察了已报导的微地震事件的位置分布,发现它具有集聚(cluster)分形结构。当接近一个主岩爆时,微地震事件的集聚程度明显增加,并相应地出现分形维数值的减小。最低的分形维数值通常出现在一个主岩爆临近产生之时。这样,分形维数的变化就有可能用来进行岩爆的预测预报。这种变化与地震学中强震发生前的降维现象(b值减小)是完全一致的,我们使用损伤力学和分形概念从理论上分析了岩爆的分形和物理机理。研究表明:一个强的破坏(岩爆或地震)实际上等效于岩体内破裂的一个分形集聚。这个破裂的分形集聚所需能量耗散E随分形维数D的减小而按指数律增加:D=C_1exp[—C_2E]这样,岩爆和地震的分形自然在理论上得到很好的解释,并由此人们能更好地去理解岩爆和地震的发生和发展。

关键词：地震分形特征分形机理岩石爆炸

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节理粗糙度系数的分形估算

地质科学译丛 1992年第1期9卷 85-90页

作者：谢和平 Willian g.pariseau 王建锋王仁铎中国矿业大学 University of Utah. 315 WBB SaltLake City Utah 84112

节量剖面粗糙度可以被认为是具有有限生长的分形结构。为了模拟节理粗糙度，基于传统的科契曲线，本文建立了节理剖面的广义分形模型。根据节理凸起体的平均基底长度L^*和平均高度h^*两参数，可直接得到节理剖面的分维数，即：D=log./lo... 详细信息

节量剖面粗糙度可以被认为是具有有限生长的分形结构。为了模拟节理粗糙度，基于传统的科契曲线，本文建立了节理剖面的广义分形模型。根据节理凸起体的平均基底长度L^*和平均高度h^*两参数，可直接得到节理剖面的分维数，即：D=log./log.2(1+cos tan^-1(2h/L)]，此分维数D与节理粗糙度系数具有密切关系。其经验关系是：JRC＝85．2671（D－1）^0.5679。因此，可以说本文所提出的分形分析技术为估算JRC值提供了一种新的方法。

关键词：节理粗糙度系数分形结构岩石力学抗剪强度