文献类型：期刊文献

英文题名：Study on size effect of coal pillar stability of the gob-side coal-rock roadway in gently inclined coal seam

作者：Gao, Lin Tang, Shixian Huang, Xiaofen Liu, Pengze Deng, Chuan Zhao, Fanghao

第一作者：Gao, Lin

通信作者：Gao, L[1];Gao, L[2];Gao, L[3]

机构：[1]Guizhou Univ, Coll Min, Guiyang 550025, Peoples R China;[2]Coal Mine Roadway Support & Disaster Prevent Engn Res Ctr, Beijing 100083, Peoples R China;[3]Natl & Local Joint Lab Engn Effect Utilizat Reg Mineral Resources Karst Areas, Guiyang 550025, Peoples R China;[4]China Univ Min & Technol, Sch Safety Engn, Xuzhou 221116, Peoples R China;[5]Guizhou Inst Technol, Inst Min 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;corresponding author), Coal Mine Roadway Support & Disaster Prevent Engn Res Ctr, Beijing 100083, Peoples R China;corresponding author), Natl & Local Joint Lab Engn Effect Utilizat Reg Mineral Resources Karst Areas, Guiyang 550025, Peoples R China.

年份：2026

卷号：85

期号：5

外文期刊名：BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT

收录：;EI(收录号：20261520487607);WOS:【SCI-EXPANDED(收录号:WOS:001737929100003)】；

基金：This paper is financially supported by the National Natural Science Foundation of China (No. 52004073 and No.52264008); Guizhou Provincial Science and Technology Support Project (No. Qian Ke He Zhi Cheng [2021] General 400, Qian Ke He Zhi Cheng [2023] General 288).

语种：英文

外文关键词：Size effect of coal pillar; Gently inclined coal seam; Coal-rock roadway; Gob-side entry driving; Uniaxial compression

摘要：In order to explore the size effect of coal pillar stability of gob-side coal-rock roadway in gently inclined coal seam, the "rock-coal-rock" structure combination was constructed for mechanical analysis according to the spatial structure characteristics of coal pillar. The material ratio of the roof and floor and coal seam was determined by the ratio test. Model specimens with different coal pillar widths were made, and the failure characteristics of specimens during uniaxial compression were analyzed. The research results show that when the height of coal and rock mass in the combination is a fixed value, the greater the elastic modulus of rock mass or coal, the greater the elastic modulus of the whole combination, the greater the width of coal, the greater the elastic modulus of coal body, the stronger the resistance to failure of the combination, the more difficult to deform; in the process of uniaxial compression, the compressive strength and peak strength of the "rock-coal-rock" structure combination specimen increase with the increase of the width of the coal pillar, the deformation of the specimen reaches the peak strength decreases accordingly, and the time to reach the peak strength of the sample was also prolonged. In the uniaxial compression test of samples with different coal pillar sizes, the force-time and force-displacement curves mainly include the gentle concave section (origin to point A), the straight rising section (point A to point B), the fluctuating rising section (point B to point C) and the sharp drop section (point C to the end of the curve). Among them, point B was the critical point of crack generation, and comprehensive consideration of specimen under uniaxial compression deformation and failure process, the progressive failure process of the sample under uniaxial compression was divided into three stages: original compaction stage, linear elastic stage and comprehensive failure stage. The research conclusion can provide a theoretical basis for the reasonable coal pillar width setting of coal-rock gob-side entry driving in gently inclined coal seam.