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首页> 外文会议>SME annual meeting exhibit;CMA National Western Mining conference >SELECTED FACTORS AFFECTING LONGWALL MINE LAYOUTS IN THE PITTSBURGH COALBED OF SOUTHWESTERN PENNSYLVANIA
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SELECTED FACTORS AFFECTING LONGWALL MINE LAYOUTS IN THE PITTSBURGH COALBED OF SOUTHWESTERN PENNSYLVANIA

机译：影响宾夕法尼亚州西南部匹兹堡煤层长城矿布局的部分因素

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摘要

Longwall mining began within the Pittsburgh coalbed of Pennsylvania (PA) in the early 1970's. Originally, longwall mine layouts were designed to fit within existing room-and-pillar operations, where panels were limited to that of typical production panels, e.g. a few hundred feet wide by a few thousand feet long. In these early designs, the gate entries were comprised of chain pillars similar to those found along main entry systems or within pillar recovery sections. The modern longwall mine has little in common with their 1970's predecessors. Today the entire mine layout is designed around the longwall mining method. The longwall panels have grown to well over one thousand feet in width with lengths now measured in miles. In addition, development pillar sizes and shapes are matched to specific performance requirements.
机译：长壁开采始于1970年代初在宾夕法尼亚州（PA）的匹兹堡煤层内。最初，长壁矿井布局设计为适合现有的房间和柱子作业，其中面板仅限于典型的生产面板。几百英尺宽，几千英尺长。在这些早期设计中，大门入口由链柱组成，类似于沿着主入口系统或在柱回收段内发现的那些。现代长壁矿山与1970年代的前身几乎没有共同之处。如今，整个采矿布局都是围绕长壁开采方法设计的。长壁面板的宽度已经增长到一千多英尺，现在的长度以英里为单位。此外，开发支柱的尺寸和形状也可以满足特定的性能要求。

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