文献类型：期刊文献

英文题名：Study on overlying strata breaking law and dynamic pressure characteristics of shallow buried coal seam mining under gully landform

作者：Wen, Haochen Li, Yanjiao Wu, Guiyi Kong, Dezhong Xu, Mengtang Liao, Jiawei

第一作者：Wen, Haochen

通信作者：Wu, GY[1];Kong, DZ[1]

机构：[1]Guizhou Univ, Coll Min, Guiyang 550025, Peoples R China;[2]Guizhou Inst Technol, Inst Ming Engn, Guiyang 550003, Peoples R China

第一机构：Guizhou Univ, Coll Min, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Min, Guiyang 550025, Peoples R China.

年份：2026

卷号：183

外文期刊名：ENGINEERING FAILURE ANALYSIS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001609468200004)】；

基金：We acknowledge the financial support from the Qiankehe Platform Talents, Grant/Award Number: (GCC [2023] 056) ; Guizhou Provincial Department of Education 2023 Annual College Science and Technology Innovation Team (Guizhou Education Technology [2023] 055) ; National Natural Science Foundation of China (No. 52564007, No. 52164002, No. 52164005, No.52564015) ; Guizhou Provincial Basic Research Program (Natural Science) (Qianke He Foundation-ZK [2024] Key 022) ; Guizhou Provincial Science and Technology Department Innovation Talent Team Construction Project (Qiankehe talent CXTD [2025] 025) .

语种：英文

外文关键词：Gully landform; Shallow coal seam; Repeated mining; Overburden fracture; Dynamic pressure

摘要：Due to the deterioration of high stress environment and formation conditions caused by karst landform, it is easy to cause overburden fracture and mining stress variation in the process of coal seam mining. In order to study the dynamic pressure difference caused by shallow coal seam mining under gully landform, through the coupling of topographic heterogeneity and repeated mining, the deformation and fracture phenomenon of overlying strata in shallow coal seam working face in southwest China mining area is studied and analyzed as follows: Through theoretical analysis, it is concluded that the mining under non-uniform effective load makes the stress span of rock mass show the distribution characteristics of ' middle concentration and attenuation on both sides '. The UDEC numerical simulation software is used to construct a threedimensional model under the actual gully landform. It is concluded that the initial caving step distance and periodic weighting step distance of shallow buried coal seam under gully landform are correspondingly reduced, while the strain field experiences the process of ' periodic expansion-cross-layer coupling-residual stability ' in the process of repeated mining, and the boundary area such as open-off cut continues to have high strain concentration due to the constraint effect, which reflects the dynamic correlation between the longitudinal transmission of dynamic pressure stress and the coordinated response of overburden structure. By using the similar simulation experiment, it is concluded that the displacement contour of No. 5 coal mining is symmetrical, the middle part is a ' funnel-shaped ' settlement center, the maximum displacement is 6.858 mm. During the repeated mining of No. 6-1 coal seam, the subsidence center is left, the maximum subsidence is 12.54 mm, and the displacement gradient on the left side is significantly larger than that on the right side.