Analysis of subsidence mechanism suggests that subsiding rate decreases with basin evolution.
沉降机制分析表明，其沉降速率总体呈下降趋势。
Aiming at the fractured mechanism of mine shaft lining under the condition of stratum subsiding, a new type of retractable drilling shaft lining structure was proposed.
针对地层沉降条件下煤矿立井井壁的破坏机理，提出了一种新型可缩性钻井井壁结构。
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