摘要
利用自行研制的实验装置研究了在瓦斯压力变化过程中煤体吸附瓦斯后发生的变形,并在已有研究的基础上讨论了瓦斯对煤体的影响。研究结果表明:煤样吸附瓦斯气体后发生膨胀变形;游离和吸附瓦斯的存在会削弱煤体的强度,使煤体脆性度增大,其失稳破坏更易发生,煤体失稳破坏进程加快;煤体吸附的瓦斯气体中吸附性越强的气体所占比例越大,煤体发生的膨胀变形将越大;在现场受限条件下,煤体产生的膨胀应力越大,煤体的强度降低得越多。
Coal deformation with the change of gas pressure was studied during coal absorbing gas by the use of self-developed experimental device and on the basis of previous studies,the impact of gas on coal was analyzed.The results show that swelling deformation of coal occurs after coal absorbs gas.The existence of free and adsorbed gas will weaken the strength of coal,which result into coal brittleness degree increasing and make coal body more instable and coal failure speed faster.The stronger absorption of gas is,the more gas content in coal body is,the greater swelling deformation of coal occurs.When the coal is under limited conditions,the greater the swelling stress occurs,the more the coal intensity reduces.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2011年第12期2035-2038,共4页
Journal of China Coal Society
基金
国家重点基础研究发展计划(973)资助项目(2011CB201202)
国家自然科学基金面上资助项目(50874110)
中国矿业大学(北京)基本科研业务费专项基金资助项目(2009QZ09)
关键词
瓦斯
吸附
煤体
膨胀变形
gas
adsorption
coal body
swelling deformation
