Experimental Study on the Swelling Power of Sandstone at High Temperature

摘要：

The hot swelling power of sandstone token from the roof of coal seam in Guhanshan coal mine, Jiaozuo has been studied when the temperature is from 200℃ to 600℃ in this paper. The experimental results show that the heat swelling power appeared at low heating temperature because of the sandstone with lot of clay, and the swelling power is smaller when the temperature is lower than 500℃,but it will sharply rise when the temperature is higher than 500℃. It indicates that main reasons are both morphic transformation of crystalloid and structual break of mudstone when the temperature is low, and the sharply change of the swelling power is caused by both break of crystal structure and the formation of new crack in the interior of sandstone when the temperature is upto a specifical temperature.

关键词： rock mechanics heat swelling power high temperature sandstone

作者: CHEN Lunjian ZHAO Hongbao LIU Xiliang HUANG Xiaoguang

作者单位: College of Material Science and Engineering, Henan Polytechnic University, jiaozuo, 454003, China College of Resources and Environmental Sciences, Chongqing University, Chongqing 400044, China College of Civil Engineering, Henan Polyteclmic University, Jiaozuo 454003, China

会议类型: 国际会议

会议名称: The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)

会议地点: 河南焦作

会议语种:英文

页码: 540-544

在线出版日期: 2007-04-17（万方平台首次上网日期，不代表论文的发表时间）