文献类型：期刊文献

英文题名：Deformation Characteristics and Breakage Mechanism of Thick-Hard Roof Based on a Medium-Thick Plate Mechanical Model

作者：Cao, Zhengzheng Xiong, Yi Xue, Yufeng Zhu, Desheng Li, Guosheng Xu, Youlin Teng, Teng Xue, Yi

第一作者：Cao, Zhengzheng

通信作者：Teng, T[1];Xue, Y[2]

机构：[1]Henan Polytech Univ, Sch Civil Engn, Jiaozuo 454000, Peoples R China;[2]Yangzhou Univ, Inst Geotech Engn, Yangzhou 225009, Peoples R China;[3]Guizhou Inst Technol, Inst Min Engn, Guiyang 550003, Peoples R China;[4]China Univ Min & Technol Beijing, State Key Lab Geomech & Deep Underground Engn, Beijing 100083, Peoples R China;[5]Xian Univ Technol, Sch Civil Engn & Architecture, Xian 710048, Peoples R China

第一机构：Henan Polytech Univ, Sch Civil Engn, Jiaozuo 454000, Peoples R China

通信机构：corresponding author), China Univ Min & Technol Beijing, State Key Lab Geomech & Deep Underground Engn, Beijing 100083, Peoples R China;corresponding author), Xian Univ Technol, Sch Civil Engn & Architecture, Xian 710048, Peoples R China.

年份：2026

卷号：14

期号：15

外文期刊名：PROCESSES

收录：;EI(收录号：20263321290667);Scopus(收录号：2-s2.0-105047030705);WOS:【SCI-EXPANDED(收录号:WOS:001846744600001)】；

基金：This research was funded by the Natural Science Foundation of Henan Province (262300421050); the National Natural Science Foundation of China (52274079, U24B2041); the Key Research and Development Program of Henan Province (251111320400); the Program for Science and Technology Innovation Talents in Universities of Henan Province (24HASTIT021); the Program for the Scientific and Technological Innovation Team in Universities of Henan Province (23IRTSTHN005); and the Young Teacher Foundation of Henan Polytechnic University (2023XQG-01).

语种：英文

外文关键词：thick and hard roof; coal-wall-spalling-induced rockburst; bending moment; shear force; roof fracture pattern

摘要：To solve the whole cutting-off and large-area weighting of thick-hard roof led by the high-intensity mining in working face, the mechanical mechanism of the impact pressure of thick-hard top working face in the Shendong mining area is studied. The thick-hard roof in the Shendong mining area is characterized by large thickness, high strength, and difficulty in caving, which frequently triggers strong mine pressure, coal wall spalling, rock bursts, and mining-induced seismicity. Traditional thin-plate theory ignores transverse shear deformation and cannot satisfy the calculation accuracy requirements of thick-hard strata with a large thickness-width ratio, so it is necessary to establish a more accurate medium-thick plate mechanical model. By analyzing the boundary conditions of the thick-hard-roof working face in the Shendong mining area, the mechanical model of the medium-thick plate under four typical boundary conditions is established. Then, the finite integration method is used to solve the deflection, bending moment, and shear force of the thick-hard roof under the four boundary conditions. Through the programming operation, the influence laws of the deflection, bending moment, and shear force of the thick-hard roof are analyzed. The results show that under tensile failure, the cracks expand along the long side. Then, the cracks occur on the short side of the thick roof. Along the short side, the cracks occur in the middle and expand on the short side of the two sides with the increase in plate thickness, and the bending moment and shear values gradually decrease. For the medium plate of the same thickness, as the width-to-length ratio increases, the deflection value gradually increases, and the bending moment and shear value gradually decrease. The research results reveal the deformation and breaking rules of thick-hard roofs based on the mechanical model of thick plates, which lays a theoretical foundation for the study of the coal-wall plate impact-pressure mechanism induced by the instability of thick-hard roofs.