文献类型：期刊文献

英文题名：Mechanical characteristics and deformation control of surrounding rock in weakly cemented siltstone

作者：Yu, Weijian Li, Ke Liu, Ze An, Baifu Wang, Ping Wu, Hai

第一作者：Yu, Weijian

通信作者：Li, K[1];Li, K[2]

机构：[1]Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan 411201, Hunan, Peoples R China;[2]Hunan Univ Sci & Technol, Hunan Prov Key Lab Safe Min Tech Coal Mines, Xiangtan 411201, Hunan, Peoples R China;[3]Guizhou Inst Technol, Coll Min, Guiyang 550003, Guizhou, Peoples R China

第一机构：Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan 411201, Hunan, Peoples R China

通信机构：corresponding author), Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan 411201, Hunan, Peoples R China;corresponding author), Guizhou Inst Technol, Coll Min, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院;

年份：2021

卷号：80

期号：9

外文期刊名：ENVIRONMENTAL EARTH SCIENCES

收录：;EI(收录号：20211710246350);Scopus(收录号：2-s2.0-85104454323);WOS:【SCI-EXPANDED(收录号:WOS:000640852400001)】；

基金：This research was financially supported by the National Natural Science Foundation of China (No. 51974117, 51874109, 51774133), New Talent Training Project of Guizhou Institute of Technology (No. GZLGXM-02), and Hunan Provincial Natural Science Foundation of China (No.2020JJ4027). Dr. Genshui Wu from China University of Mining and Technology (Beijing) had provided a lot of valuable opinions on this article. We would like to express our sincere thanks to Dr. Wu.

语种：英文

外文关键词：Weakly cemented siltstone; Roadway support technology; Marithan polyurethane; Grouting reinforcement; Combined support scheme

摘要：The roof of coal seams are mostly soft rock with weak cementation. To further study the mechanical characteristics and deformation control scheme of the roadway with weakly cemented siltstone as roof, this paper took Linchang coal mine as the research background and adopted field investigation methods, laboratory experiments, and theoretical analysis. Using a scanning electron microscope, it is found that the weakly cemented siltstone is composed of coarse-grained minerals with a high degree of pore development. According to the analysis, the instability factors of weakly cemented siltstone roadway include the late diagenetic age of rock, the low mechanical strength of rock, and the change of surrounding rock properties by pouring water. The selection of grouting reinforcement materials was studied in detail. The test results show that cement-bonded specimens' strength is lower than that of Marithan polyurethane cement specimens in general. The combined support scheme based on grouting reinforcement is put forward. Field monitoring data show that the designed support scheme can effectively control the surrounding rock deformation of weakly cemented siltstone roadway.