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MINING DESIGN METHOD FOR NEAR-WHOLE ROCK UPPER PROTECTIVE LAYER IN COAL SEAM MINING

机译:煤层开采近全层上部保护层的开采设计方法

摘要

A mining design method for near-whole rock upper protective layer in coal seamminingis provided. Based on information about engineering geologic conditions of aprotective layermining well and physico-mechanical parameters of a coal-rock mass sample,protective layermining thickness M and interval H between the protective and the protectedlayers aredetermined by numerical analysis such that an expansion deformation rate y ofthe protectedlayer, a failure depth K of a floor plastic zone of the protective layer, anda coal seam gaspressure P meet the Provision in Prevention and Control of Coal and GasOutburst. From amining thickness percentage accounted by rock in the near-whole rock upperprotective layer,a mining process is determined from among a fully-mechanized coal miningprocess, afully-mechanized coal mining process assisted by single-row hole pre-splittingblasting, and afully-mechanized coal mining process assisted by double-row twisted holeblasting.
机译:煤层近岩上部保护层的开采设计方法矿业提供。基于有关某地的工程地质条件的信息保护层采煤井和煤岩样的物理力学参数,保护层保护层和保护层之间的开采厚度M和间隔H层是通过数值分析确定,使得膨胀变形率y为受保护的层,保护层的地板塑料区域的破坏深度K和煤层气P符合《煤与瓦斯防治规定》爆发从一个近整个岩层中岩石所占的采矿厚度百分比保护层采煤工艺是从全机械采煤中确定的过程,一个单排孔预裂辅助全煤开采工艺爆破和双排扭孔辅助全采煤工艺爆破。

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