深埋煤层强采动覆岩破断特征及矿压显现规律

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中图分类号：TD325 文献标志码：A 文章编号：1008-0562（2026）02-0146-09

Abstract：To further elucidate the manifestation patern of strong strata behavior in overlying rocks under intense mining in deep-buried coal seams，this study takes the 1014 working face of Huangling No.1 Coal Mine as the engineringcase study.Geological investigation，physical similarity modeling，and in-situ monitoring were jointlyemployed to analyze the fracture-instabilitycharacteristics of the overburden and theassociated groundpressure response.A pressure-relief scheme based on pre-spliting borehole roof cuting was then proposed，and its unloading and regulation performance was Validated through field measurements.The results show that with continuous faceadvancement，both theroof caving interval and the shield support resistance increased progressively，and the support resistance reached a maximum of 34MPa when the face advanced to 210m . The spatialdistributionand intensitycharacteristics of overburden microseismic events indicate thatthe thick and hard sandstone layer above the coal seam is the mechanical source that induces strong ground presure manifestation on the working faceand continuous large deformation of the gob-side entry.Field monitoring further demonstrates that，after pressre relief，the roadwayroof subsidence，sidewall convergence，and floor heave decreased by 17.8% ， 25.4% ，and 23.87% ，respectively. The pre-splitting borehole roof-cuting pressurerelief scheme can effectively suppress strong ground-pressure behavior and mitigate roadway surrounding-rock deformation. The research findings provide a reference for the surrounding rock control of gob-side entry in mines under similar conditions.

Keywords： deep-buried coal seam； high intensity mining; overburden migration; strong ground pressure behavior;pressure relief regulation

0 引言

随着浅部煤炭资源的日益枯竭，矿井开采深度和强度持续增加[1-3]，矿井开采面临的全新瓶颈逐步显现。（剩余14033字）