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条带开采中煤柱稳定性分析
引用本文:胡炳南.条带开采中煤柱稳定性分析[J].煤炭学报,1995,20(2):205-210.
作者姓名:胡炳南
作者单位:煤炭科学研究总院北京开采研究所
基金项目:煤炭工业部、电力工业部联合科研项目
摘    要:系统地分析了条带开采中煤柱稳定性问题。通过多个实例计算的对比分析,建议采用Wilson强度公式进行一般地质采矿条件下条带煤柱强度的计算。从煤柱强度分析出发,导出了任意方向弱面的剪力强度安全系数计算式;建立了顶底板通过摩擦作用施加给煤柱的儿拉压应力引起的煤柱屈服区宽度变化的简化计算式;从3向受力状态角度分析了侧限力对增加煤柱强度的机理问题;还强调了煤柱载荷与采出率之间的非线性关系和条带开采设计中应注

关 键 词:条带开采  煤柱  稳定性  煤矿

PILLAR STABILITY ANALYSIS IN STRIP MINING
Hu Bingnan.PILLAR STABILITY ANALYSIS IN STRIP MINING[J].Journal of China Coal Society,1995,20(2):205-210.
Authors:Hu Bingnan
Abstract:A systematic analysis of pillar stability in strip mining was made.It suggest that A. H.Wilson's formusa of pillar strength is to be adopted for the general geological and mining conditions based on case studies. The safety factor of shear strength at weak plane in any direction was deduced.The simplified formula for calculation of v.vriation of width of the yielded zone due to the friction effect between the roof or floor and coal pillar was also proposed. The mechanism of increasing the strength of coal pillar by confined pressure was investigated under triaxial stress conditions. The authors concentrated on the non-linear relationship between pillal load and the extraction ratio. Several problems in strip mining design were pointed out.
Keywords:strip mining  coal pillar  strength  stabillty analysis
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