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煤炭工程  2014 

下位煤层垂直布置煤柱尺寸优化分析

DOI: 10.11799/ce201403005, PP. 13-16

Keywords: 支承压力,煤柱,卸压系数,集中系数

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Abstract:

针对多煤层矿井,本文研究了10m煤柱支承压力的顶底板传播分布规律,在此基础上比较分析了下位煤柱垂直布置大于、等于或少于上方煤柱三种不同尺寸时对上方煤柱的卸压程度、煤柱的峰值压力系数以及在底板的传播深度三个方面。研究结果表明煤柱压力在不同煤柱尺寸组合下传播形式不同,单煤层煤柱压力在顶底板呈“8”形分布,双煤层煤柱垂直布置时压力在底板呈半椭圆形传播分布。当下位煤柱尺寸少于上方煤柱时,煤柱压力峰值系数较低,底板传播深度较小,对上方煤柱的泄压效果也越好。该结果对垂直布置煤柱合理选择煤柱尺寸和小煤柱的推广应用提供了一定的指导意义。

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