研究结果表明，下山煤柱区地层结构与开采形成的“不对称工字形”覆岩空间结构是造成异常应力集中的根本原因。
The results show that the strata structure of dip pillar area and the asymmetric I-shaped spatial strata structure formed by excavation are primary causes of abnormal stress concentration.
研究结果表明，下山煤柱区地层结构与开采形成的“不对称工字形”覆岩空间结构是造成异常应力集中的根本原因。
The results show that the strata structure of dip pillar area and the asymmetric I-shaped spatial strata structure formed by excavation are primary causes of abnormal stress concentration.
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