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中文摘要：
长沟峪矿-140m水平东一石门是开采-230～-310m水平4槽煤柱的惟一通道，通过数值模拟手段分析了4槽煤柱终采线“移动”后围岩的等效应力场，得到了沿-140m水平石门的等效应力和位移的变化曲线，分析了-140水平石门保护煤柱合理尺寸。
英文摘要：
East-1 cross-cut at -140m level in Changgouyu Colliery is the only passage of mining 4th coal pillar between -230m ～- 310m. This paper analyzes equivalent stress field of surrounding rock after end-mining line moves by numerical simulation and obtains curves of cross-cut＇s equivalent stress and displacement along -140m level. It also analyzes reasonable dimension of protective pillar for cross-cut at -140m level.
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