...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Mining Engineering >Update on face-ventilation research for improved longwall-dust control
【24h】

Update on face-ventilation research for improved longwall-dust control

机译：脸部换气研究的最新进展，以改善长壁粉尘控制

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Although the number of operating longwall mining systems has remained relatively constant, longwall production levels during the last five years have increased significantly. In the United States, longwall mining now accounts for approximately 50% of all underground coal production. While longwalls are highly productive and offer other advantages, operations employing this method of mining continue to experience dust-compliance problems. This increased longwall productivity has meant that far more dust is being produced. An improved understanding of the longwall face-ventilation system and the advancement of face-ventilation technologies are necessary to ensure all face personnel are allowed to work in an environment that is free of excessive levels of airborne respirable coal mine dust. The Dust and Toxic Substances Control Branch, National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, Examined several basic principles of the longwall face-ventilation system and has evaluated the effectiveness of numerous improved face-ventilation techniques for longwall mining systems. These include identifying improved techniques for measuring face-ventilation parameters on longwall mining sections and investigating the fundamental relationship between face airflow and the entrainment and dilution of respirable coal mine dust. Studies have been completed to determine the impact on face dust levels of using belt entry air to ventilate the longwall. Novel methods have been identified to increase the face airflow and to manage face airflow to effectively minimize dust exposure to face workers. Unique systems of auxiliary face ventilation have been developed and evaluated at full-scale, simulated longwall test facilities. The theoretical and applied aspects of each of these principles and technologies are discussed. Application of these results throughout the longwall mining industry, as documented from surveys conducted in the early 1980s and 1990s, have reduced the health hazard associated with excessive exposure to respirable coal mine dust.
机译：尽管运行的长壁开采系统的数量保持相对恒定，但过去五年来长壁开采水平已显着提高。在美国，长壁开采目前约占所有地下煤炭产量的50％。尽管长壁高产并具有其他优势，但采用这种采矿方法的作业仍会遇到粉尘达标问题。长壁生产率的提高意味着产生了更多的粉尘。必须确保对长壁工作面通风系统有更好的了解，并需要改进工作面通风技术，以确保所有工作面人员都可以在无过量空气中可吸入煤矿尘埃的环境中工作。匹兹堡研究实验室国家职业安全与健康研究院尘埃和有毒物质控制分会检查了长壁面通风系统的几个基本原理，并评估了长壁采矿系统中多种改进的面通风技术的有效性。这些措施包括确定改进的技术，以测量长壁开采段的工作面通风参数，并研究工作面气流与可吸入煤矿尘埃夹带和稀释之间的基本关系。已经完成了研究，以确定使用皮带进入空气对长壁通风对面部粉尘水平的影响。已经发现了新颖的方法来增加面部气流并管理面部气流以有效地减少灰尘暴露于面部工人。已经开发了独特的辅助面部通风系统，并在全面的模拟长壁测试设备上进行了评估。讨论了每种原理和技术的理论和应用方面。 1980年代初期和1990年代进行的调查表明，这些结果在整个长壁采矿业中的应用，减少了与过量吸入可吸入粉尘产生的健康危害。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号