The dynamic load effect of supports is mainly caused by the movement of the roof structure and the load transfer of overburden. In view of the practice issue that the phenomenon of strong ground pressure is easy to happen, when the working face of the lower coal seam passes the inclined coal pillar in shallow buried closely multiple-seam, it will lead to supprot damaged. This paper takes the mining of over-inclined coal pillars in the 22410 working face of the Bulianta Coal Mine as the background, based on the research method combining the field measurement, physical simulation experiment, and numerical calculation, the evolution law of the front abutment pressure (FAP) and roof weighting in mining under the inclined coal pillar is analyzed, and the mechanism of the stress transfer of the inclined coal pillar and the dynamic load of the support is revealed. The research shows that the concentrated stress of the coal pillar is jointly borne by the front coal wall of the working face and the interburden structure above the support. The vertical stress transmitted from the coal pillar to the floor acts on the key blocks of the interburden of the lower coal seam, which causes strong pressure and dynamic load effect, such as roof structure cut-off. The periodic breaking of the key stratum of the interburden leads to the development height and range of the cracks increasing stepwise. The partition characteristics of the mutual transformation of the interburden stress, the FAP, and the working resistance (WR) by passing the coal pillar stage are revealed, which is divided into three stages and four regions. With the working face passing through the inclined coal pillar, the influence area of the concentrated stress of the coal pillar is reduced, and the peak stress of the coal pillar is gradually transferred to the outside of the coal pillar. When the working face is 5 m away from the coal pillar, the peak of FAP and WR reaches the maximum values, the roof is cutting along the peak stress line, and the working face has a strong weighting phenomenon. The research results are consistent with the field measurement results, providing a reference for the mining of working faces under similar conditions.

Aiming at investigating the strong roof weighting when the large height mining face is nearing the main withdrawal roadway, the 52,304 working face (WF) nearly through the main withdrawal roadway mining in a colliery of Shendong coalfield was taken as the research background. The ground pressure, roof structure, and superposition effect of stress in the last mining stage were studied by field measurement, physical simulation, and numerical calculations. The obtained results demonstrated that the main roof formed the “long step voussoir beam” structure under the influence of the main withdrawal roadway. The superposition effect of the front abutment pressure of the WF and the concentrated stress of the main withdrawal roadway caused the stress asymmetrical distribution on the two sides -level hard rock straof the main withdrawal roadway, and the stability of the pillar on the mining side decreases. The initial average periodic weighting interval was 20.7 m. While the WF approaches the main withdrawal roadway, the pillar near the WF of the main withdrawal roadway collapsed, the main roof was broken ahead of the WF, and the actual roof control distance of support and the periodic weighting interval increased by 2.56 and 1.26 times the normal state, respectively. Consequently, the “static load” of the immediate roof and the “dynamic load” of the sliding unsteadiness of the long step voussoir beam increased. The structural model of the “long step voussoir beam” under the superposition of “static and dynamic load” was established concerning those results, and an expression was proposed to compute the support resistance. Meanwhile, the mechanism of strong roof weighting was revealed when the WF was nearly through the main withdrawal roadway. The research conclusion is expected to provide a guideline for the safe withdrawal of the large-height mining faces under similar conditions.

Aiming at the problem that the irrational setting of the width of sectional coal pillar (CP) during the mining of deep‐buried fully mechanized top‐coal caving (FMTC) face is likely to trigger strong ground pressure disasters, this paper took the geological and mining conditions of Dongpo Deep‐buried Coal Mine as a case for research. A combination of mechanical testing, physical simulation, numerical analysis, and theoretical evaluation was employed to investigate the overburden structure and ground pressure behavior in the FMTC face. This research explores the stress distribution and plastic deformation behavior of coal support structures with different widths in the context of secondary mining. It also examines the relationship between the CP’s width‐to‐height ratio, the load it carries, and its plastic failure behavior, ultimately establishing a stability criterion that considers the safety factor and risk of instability. The findings indicate an inverse relationship between the width‐to‐height ratio of CP and the load they bear, as well as the extent of plastic failure, while a positive correlation exists with the ratio of the elastic core area. When the CP width exceeds 18 m, the elastic core area ratio surpasses 69.4%, the safety factor exceeds 1.1, and the instability probability is below 45%. Based on these results, the study suggests that the sectional CP with a width of 25 m in Dongpo Coal Mine can be optimized, proposing that a width of at least 18 m between adjacent working faces is adequate for safe production. These findings have been successfully applied in the mine’s 406 FMTC face, yielding positive safety outcomes and notable economic benefits. The results offer valuable insights for optimizing CP sizes in similar deep‐buried FMTC face under comparable geological and mining conditions, with substantial theoretical and practical significance.