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首页> 外文会议>SME annual meeting and exhibit 2008 : New Horizons-New Challenges >OVERVIEW OF COAL MINE GROUND CONTROL ISSUES IN THE ILLINOIS BASIN
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OVERVIEW OF COAL MINE GROUND CONTROL ISSUES IN THE ILLINOIS BASIN

机译：伊利诺伊盆地的煤矿地面控制问题概述

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Some of the most difficult coal mine roof in the U.S. can be found in the Illinois Basin. Factors contributing to the high roof fall rate include: weak moisture-sensitive roof rock, high horizontal stress, and limited longwall mining. The depth of cover ranges from 90-1,000 ft and roof damage from horizontal stress can be severe. Moisture sensitive-roof rock is common above the Springfield-Harrisburg Herrin #5 and #6 seams in the Illinois Basin, and contributes to roof skin deterioration. The roof fall rate increases significantly in the humid summer months. The National Institute for Occupational Safety and Health (NIOSH) has shown, using lab and field studies, that highly moisture-sensitive roof rock can be directly correlated to poor roof conditions. Controlling the skin is the key to reducing rock fall injuries, and roof screening is, by far, the best remedy. Illinois Basin coal operators have been successful in reducing the number of rock fall injuries in recent years. NIOSH has documented best practices for screen installation which has resulted in safe, efficient operations. Other solutions to skin failure include: the use of denser five bolts per row patterns to reduce spans between bolts, systematic supplemental support in intersections, straps and large pans protecting operators, and air conditioning to remove moisture from the intake air.
机译：在美国伊利诺伊州盆地中可以找到一些美国最困难的煤矿屋顶。导致高屋顶跌落率的因素包括：对湿气敏感的屋顶岩石薄弱，水平应力高以及长壁开采受限。覆盖层的深度为90-1,000英尺，水平应力可能会严重损坏屋顶。在伊利诺伊州盆地的斯普林菲尔德-哈里斯堡Herrin＃5和＃6煤层上方普遍存在对湿度敏感的屋顶岩石，并导致屋顶表皮退化。在潮湿的夏季，屋顶的掉落率显着增加。美国国家职业安全与健康研究所（NIOSH）通过实验室和现场研究表明，对湿气高度敏感的屋顶岩石可能与恶劣的屋顶条件直接相关。控制皮肤是减少岩石坠落伤害的关键，到目前为止，对屋顶进行检查是最好的治疗方法。伊利诺伊州盆地的煤炭运营商近年来已成功减少了岩崩事故的发生。 NIOSH已记录了屏幕安装的最佳做法，从而可以实现安全，高效的操作。解决皮肤故障的其他解决方案包括：在每排模式中使用更密集的五个螺栓，以减少螺栓之间的跨度；在交叉口，皮带和大锅具上提供系统的辅助支撑，以保护操作员；以及空调，以去除进气中的水分。

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