Mining engineering最新文献_第7页

Comparison of MERV 16 and HEPA filters for cab filtration of underground mining equipment. 地下采矿设备驾驶室过滤merv16与HEPA过滤器的比较。

Mining engineering Pub Date : 2016-08-01 DOI: 10.19150/me.6712

A B Cecala, J A Organiscak, J D Noll, J A Zimmer

{"title":"Comparison of MERV 16 and HEPA filters for cab filtration of underground mining equipment.","authors":"A B Cecala, J A Organiscak, J D Noll, J A Zimmer","doi":"10.19150/me.6712","DOIUrl":"https://doi.org/10.19150/me.6712","url":null,"abstract":"Significant strides have been made in optimizing the design of filtration and pressurization systems used on the enclosed cabs of mobile mining equipment to reduce respirable dust and provide the best air quality to the equipment operators. Considering all of the advances made in this area, one aspect that still needed to be evaluated was a comparison of the efficiencies of the different filters used in these systems. As high-efficiency particulate arrestance (HEPA) filters provide the highest filtering efficiency, the general assumption would be that they would also provide the greatest level of protection to workers. Researchers for the U.S. National Institute for Occupational Safety and Health (NIOSH) speculated, based upon a previous laboratory study, that filters with minimum efficiency reporting value, or MERV rating, of 16 may be a more appropriate choice than HEPA filters in most cases for the mining industry. A study was therefore performed comparing HEPA and MERV 16 filters on two kinds of underground limestone mining equipment, a roof bolter and a face drill, to evaluate this theory. Testing showed that, at the 95-percent confidence level, there was no statistical difference between the efficiencies of the two types of filters on the two kinds of mining equipment. As the MERV 16 filters were less restrictive, provided greater airflow and cab pressurization, cost less and required less-frequent replacement than the HEPA filters, the MERV 16 filters were concluded to be the optimal choice for both the roof bolter and the face drill in this comparative-analysis case study. Another key finding of this study is the substantial improvement in the effectiveness of filtration and pressurization systems when using a final filter design.","PeriodicalId":91142,"journal":{"name":"Mining engineering","volume":"68 8","pages":"50-58"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4982552/pdf/nihms807474.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34369812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

NEW IMPROVEMENTS TO MFIRE TO ENHANCE FIRE MODELING CAPABILITIES. 对mfire进行了新的改进，增强了火灾建模能力。

Mining engineering Pub Date : 2016-06-01 DOI: 10.19150/me.6628

L Zhou, A C Smith, L Yuan

{"title":"NEW IMPROVEMENTS TO MFIRE TO ENHANCE FIRE MODELING CAPABILITIES.","authors":"L Zhou, A C Smith, L Yuan","doi":"10.19150/me.6628","DOIUrl":"https://doi.org/10.19150/me.6628","url":null,"abstract":"NIOSH's mine fire simulation program, MFIRE, is widely accepted as a standard for assessing and predicting the impact of a fire on the mine ventilation system and the spread of fire contaminants in coal and metal/nonmetal mines, which has been used by U.S. and international companies to simulate fires for planning and response purposes. MFIRE is a dynamic, transient-state, mine ventilation network simulation program that performs normal planning calculations. It can also be used to analyze ventilation networks under thermal and mechanical influence such as changes in ventilation parameters, external influences such as changes in temperature, and internal influences such as a fire. The program output can be used to analyze the effects of these influences on the ventilation system. Since its original development by Michigan Technological University for the Bureau of Mines in the 1970s, several updates have been released over the years. In 2012, NIOSH completed a major redesign and restructuring of the program with the release of MFIRE 3.0. MFIRE's outdated FORTRAN programming language was replaced with an object-oriented C++ language and packaged into a dynamic link library (DLL). However, the MFIRE 3.0 release made no attempt to change or improve the fire modeling algorithms inherited from its previous version, MFIRE 2.20. This paper reports on improvements that have been made to the fire modeling capabilities of MFIRE 3.0 since its release. These improvements include the addition of fire source models of the t-squared fire and heat release rate curve data file, the addition of a moving fire source for conveyor belt fire simulations, improvement of the fire location algorithm, and the identification and prediction of smoke rollback phenomena. All the improvements discussed in this paper will be termed as MFIRE 3.1 and released by NIOSH in the near future.","PeriodicalId":91142,"journal":{"name":"Mining engineering","volume":"68 6","pages":"45-50"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4928856/pdf/nihms-792351.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34524489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Discussion of “Study on correlation of quantified coal rank with self-heating temperature” 对“量化煤阶与自热温度相关性研究”的探讨

Mining engineering Pub Date : 2016-06-01 DOI: 10.19150/me.6629

J. Grubb, B. Beamish

引用次数: 0

Comparable mineral properties – do they exist for market value appraisals? 可比较的矿产属性——它们是否存在于市场价值评估中?

Mining engineering Pub Date : 2016-05-01 DOI: 10.19150//me.6586

T. Ellis

引用次数: 1

Modeling maximum ramp-up and production rates of stoping mining 采场开采的最大上升率和生产率建模

Mining engineering Pub Date : 2016-05-01 DOI: 10.19150/me.6587

P. Vergara

引用次数: 0

A preliminary evaluation of a through-the-earth (TTE) communications system at an underground coal mine in Eastern Kentucky 在肯塔基州东部的一个地下煤矿，通过地球(TTE)通信系统的初步评估

Mining engineering Pub Date : 2016-04-01 DOI: 10.19150/me.6548

E. Jong, S. Schafrik, E. Gilliland

{"title":"A preliminary evaluation of a through-the-earth (TTE) communications system at an underground coal mine in Eastern Kentucky","authors":"E. Jong, S. Schafrik, E. Gilliland","doi":"10.19150/me.6548","DOIUrl":"https://doi.org/10.19150/me.6548","url":null,"abstract":"A commercially available Through-the-Earth (TTE) communications system was evaluated at an underground coal mine in eastern Kentucky. This field study was conducted as part of a larger multi-site evaluation of available TTE systems to determine their operational sensitivity. Field testing is being performed along with simulation techniques developed for geophysical surveys. The results of the field test will additionally be used to determine the applicability of these simulation techniques to TTE communications. The mine detailed in this paper was idled at the time of the study, which provided the nearest practical representation of a post-event mine shutdown. For this study, the three following communication modes were tested: surface-to-underground, underground-to-surface and surface-to-surface. Standard deployments of the TTE system using the manufacturer’s recommended procedures were able to achieve clear communications between underground and surface locations. Other arrangements of the units yielded intriguing results, some of which were predicted by computer simulations, others were unexpected. Future experimentation is planned to further evaluate the observed phenomena.","PeriodicalId":91142,"journal":{"name":"Mining engineering","volume":"68 1","pages":"52-57"},"PeriodicalIF":0.0,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67755379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Measuring the effectiveness of mining shovels 测量采矿铲的有效性

Mining engineering Pub Date : 2016-03-01 DOI: 10.19150/me.6501

S. R. Dindarloo, Elnaz Siami-Irdemoosa, S. Frimpong

引用次数: 4

Risk management: Adapting Riskgate for underground coal mines in the United States 风险管理:风险门在美国煤矿井下的应用

Mining engineering Pub Date : 2016-03-01 DOI: 10.19150/ME.6502

E. Jong, J. A. Restrepo, K. Luxbacher, P. Kirsch, R. Mitra, B. Hebblewhite, S. Schafrik

{"title":"Risk management: Adapting Riskgate for underground coal mines in the United States","authors":"E. Jong, J. A. Restrepo, K. Luxbacher, P. Kirsch, R. Mitra, B. Hebblewhite, S. Schafrik","doi":"10.19150/ME.6502","DOIUrl":"https://doi.org/10.19150/ME.6502","url":null,"abstract":"The underground coal mining industry in the United States has recently seen the occurrences of several high profile, multi-fatality events. The explosions that occurred at the Sago Mine in 2006, the Darby Mine in 2006, and the Upper Big Branch Mine in 2010 have caused a ripple in an otherwise steadily improving safety record. These events transpired in the midst of an unprecedented level of government regulations and modem safety technologies. The recent increase in fatal events in conjunction with a minimal decline of both fatal and non-fatal injuries over the past decade may signify that current safety practices have reached a level of diminishing returns. Risk management, a safety approach that has been successfully applied in various industries including mining across the world, may provide a means to surpass the safety plateau in the U.S. RISKGATE is an Australian risk management program for mines that shows great potential for application in the U.S. However, fundamental differences between the coal mining industries in Australia and in the U.S. prevent direct implementation. This paper discusses aspects of the RISKGATE body of knowledge that require some adaptation before this program may be applied to the U.S. mining industry.","PeriodicalId":91142,"journal":{"name":"Mining engineering","volume":"3 1","pages":"51-57"},"PeriodicalIF":0.0,"publicationDate":"2016-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67755310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Solving mine drainage water issues with peat-based sorption media 用泥炭基吸附介质解决矿井排水问题

Mining engineering Pub Date : 2016-02-01 DOI: 10.19150/ME.6468

P. Eger, P. Jones, D. Green

引用次数: 2

Air cleaning performance of a new environmentally controlled primary crusher operator booth. 新型环保型初碎机操作间的空气净化性能。

Mining engineering Pub Date : 2016-02-01 DOI: 10.19150/ME.6469

J. Organiscak, A. Cecala, J. A. Zimmer, B. Holen, J. R. Baregi

{"title":"Air cleaning performance of a new environmentally controlled primary crusher operator booth.","authors":"J. Organiscak, A. Cecala, J. A. Zimmer, B. Holen, J. R. Baregi","doi":"10.19150/ME.6469","DOIUrl":"https://doi.org/10.19150/ME.6469","url":null,"abstract":"The National Institute for Occupational Safety and Health (NIOSH) cooperated with 3M Company in the design and testing of a new environmentally controlled primary crusher operator booth at the company's Wausau granite quarry near Wausau, WI. This quarry had an older crusher booth without a central heating, ventilation and air conditioning (HVAC) system, and without an air filtration and pressurization system. A new replacement operator booth was designed and installed by 3M based on design considerations from past NIOSH research on enclosed cab filtration systems. NIOSH conducted pre-testing of the old booth and post-testing of the new booth to assess the new filtration and pressurization system's effectiveness in controlling airborne dusts and particulates. The booth's dust and particulate control effectiveness is described by its protection factor, expressed as a ratio of the outside to inside concentrations measured during testing. Results indicate that the old booth provided negligible airborne respirable dust protection and low particulate protection from the outside environment. The newly installed booth provided average respirable dust protection factors from 2 to 25 over five shifts of dust sampling with occasional worker ingress and egress from the booth, allowing some unfiltered contaminants to enter the enclosure. Shorter-term particle count testing outside and inside the booth under near-steady-state conditions, with no workers entering or exiting the booth, resulted in protection factors from 35 to 127 on 0.3- to 1.0-μm respirable size particulates under various HVAC airflow operating conditions.","PeriodicalId":91142,"journal":{"name":"Mining engineering","volume":"68 2 1","pages":"31-37"},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67755348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2