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Development of a modified predicted heat strain model for hot work environments

International Journal of Mining Science and Technology 2020年第4期30卷 477-481页

作者： Paloma Lazaro moe momayez Department of Mining and Geological Engineering The University of ArizonaTucsonAZ 85750USA

Excessive exposure to heat can lead to injuries,illness,and death among *** actual cost of heat-related injuries and illnesses is unknown because of underreporting and lack of symptom ***-factorial,evidence-based,and field-ready guidelines for identifying–and predicting–physiolo gical markers of heat strain are currently *** predicted heat strain(PHS)model,is the latest attempt by mining companies to aid in the evaluation and management of occupational heat *** adopted algorithm relies on worksite environmental measurements and an estimate of individual metabolic rate for mine workers to provide an estimate of the workers’core temperature during a work *** are several known limitations of the PHS model,including the assumption that the subject worker is hydrated and fit.A modified PHS model was presented based on eight physical parameters that are measured at different intervals during a work shift;these parameters are air temperature,relative humidity,air velocity,radiation,metabolic rate,acclimatization,clothing insulation and *** validate the results,the predictions from the modified PHS model were compared with direct physiological measurements obtained from ingestible pills and heat stress monitors under different environmental and working conditions.

关键词： Predicted heat strain Hot underground mines Heat strain Heat stress

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井巷多断面岩层热传递方式与深井热环境动态分析

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东北大学学报（自然科学版） 2015年第3期36卷 423-427页

作者：鹿浩罗周全 momayez moe 中南大学资源与安全工程学院湖南长沙410083 Department of Mining and Geological Engineering The University of Arizona

确定井巷风流热量来源及关键地点温度变化、热增量与损失量,并以之为依据有针对性地开展深井气候调节是通风工程需要解决的关键问题之一.通过改进传统的傅里叶导热模型,建立了基于通风井巷实际断面形状的三维热传导模型,针对不同井巷断... 详细信息

确定井巷风流热量来源及关键地点温度变化、热增量与损失量,并以之为依据有针对性地开展深井气候调节是通风工程需要解决的关键问题之一.通过改进传统的傅里叶导热模型,建立了基于通风井巷实际断面形状的三维热传导模型,针对不同井巷断面形状确定了反映流速与流量状态的动量相关的计算边界条件,并结合时间参数揭示了岩层内部导热以及井巷岩壁与气流间的热交换规律,建立了湿壁面与气流间的热湿传导方程.在此基础上,构建起国内某大型深井金属矿山井下通风系统,获得了关键地点的温度、湿度、热量等参数的走势和变化特点,为矿山开展深井气候调节与控制奠定了基础.

关键词：深井热环境岩层热多热源动态分析

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Simple Correlations between Rock Abrasion and Other Significant Rock Properties for Rock Mass and Intact Quartzite

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Open Journal of Civil Engineering 2017年第2期7卷 194-207页

作者： Scott Ureel moe momayez Department of Mining & Geological Engineering University of Arizona Tucson AZ USA

Rock abrasion plays a significant role in geotechnical design, tunneling operations and the safety of foundations from scour. It is imperative to determine such properties of uniaxial compression strength (UCS), rock quality designation (RQD) and hardness for rock engineering to help determine the amount of scour at foundation locations in order to prevent structural collapse, wear on drilling tools and help predict unstable rock conditions. Current practice for estimating maximum rock abrasion is based on the Los Angeles abrasion test;however, more research is needed to provide a more accurate and compatible method for all subsurface materials used in mining and civil engineering projects. This report will provide simple correlations relating abrasion resistance to RQD, UCS, Geological Strength Index (GSI) and Rock Mass Rating (RMR) and shear strength of metamorphic rock (Quartzite). Methods, results, recommendations and conclusions are presented. The paper also introduces recommendations for future rock abrasion techniques and discusses the use of these correlations exhibiting strong relationships between the mentioned rock properties.

关键词： Rock Abrasion RQD UCS Shear Strength LA Abrasion

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