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Characterization of noise and design of active noise control technology in longwall mines.

机译：长壁矿井的噪声特征和主动噪声控制技术设计。

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摘要

Production and safety have always been a prime issue for mining industry and mining engineers, who strive hard to achieve the critical balance between them. Hearing loss and uneasy working environment are few common ones affecting the health statistics of a underground mine. As a result, recent years there have been the focus on to develop an engineering controls to reduce the underground noise. Unique work has been done in this thesis to add additional information on the active noise control technology applied to Longwall mining operations.; Mostly, the survey results indicated that the frequency content of each noise and the number of events decide on the effect on worker. Also, in Stage loader the Lower frequencies showed a significant contribution to the overall sound pressure level (SPL). However, under some combinations the contribution of higher frequencies cannot be denied. Based on these findings, Active Noise Control (ANC) set-up was prepared for canceling the unwanted frequencies and reduces the overall sound pressure level. It was also found that the ANC was more effective for the lower frequencies ranging from 100 Hz to 700 Hz and cancellations were more significant for the low frequencies than for the higher ones. (Abstract shortened by UMI.)
机译：对于采矿业和采矿工程师来说，生产和安全一直是首要问题，他们努力实现两者之间的关键平衡。听力损失和不安的工作环境是影响地下矿山健康统计的几种常见现象。结果，近年来，人们一直致力于开发工程控制以减少地下噪声。本文完成了独特的工作，以添加有关应用于长壁采矿作业的有源噪声控制技术的其他信息。大多数调查结果表明，每种噪声的频率含量和事件数量决定了对工人的影响。同样，在舞台装载机中，低频显示出对总体声压级（SPL）的重要贡献。但是，在某些组合下，不能否认高频的贡献。基于这些发现，准备了主动噪声控制（ANC）设置以消除不需要的频率并降低总体声压级。还发现，ANC在100 Hz至700 Hz的低频范围内更有效，低频的消除效果比高频范围更大。 （摘要由UMI缩短。）

著录项

  • 作者

    Rai, Arunkumar R.;

  • 作者单位

    West Virginia University.;

  • 授予单位 West Virginia University.;
  • 学科 Engineering Mining.; Health Sciences Occupational Health and Safety.
  • 学位 M.S.Min.E.
  • 年度 2005
  • 页码 76 p.
  • 总页数 76
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 矿业工程;职业性疾病预防;
  • 关键词

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