采矿与安全工程学报2017，Vol.34Issue(3)：601-607,7.DOI:10.13545/j.cnki.jmse.2017.03.028
含水率及孔隙率对松软煤体强度特征影响的试验研究
Experimental study on the influence of moisture content and porosity on soft coal strength characteristics
摘要
Abstract
To get the change regulation of strength characteristics of soft coal under the influence of moisture content and porosity,according to soft coal of working face 66207 in Xinzhuangzi coal mine of Huainan mining group,with the device of coal sample preparation developed by ourselves,and with the help of rock mechanics test system RMT-150B,the experimental study on the effect of moisture content of strength characteristics of soft coal mass with different porosities were carried out.The results have shown that uniaxial compressive strength of soft coal under the different porosities increases first and then decreases with the moisture content;the critical moisture contents corresponding to the highest intensity have differentiation;the critical moisture content of coal increases linearly,while the highest strength of coal decreases under the influence of moisture content with the porosity.Combining the theory of liquid bridge,the internal mechanism of the evolution of mechanical characteristics of soft coal is revealed through introducing liquid saturation.The research results interpret the essential reason for the change of the critical moisture contents of soft coal,which can provide theoretical basis for safe and efficient mining of soft coal seam.关键词
松软煤体/含水率/孔隙率/强度特征/液体饱和度Key words
soft coal/moisture content/porosity/strength characteristics/liquid saturation分类
建筑与水利引用本文复制引用
朱传奇,谢广祥,王磊,王传兵,侯俊领..含水率及孔隙率对松软煤体强度特征影响的试验研究[J].采矿与安全工程学报,2017,34(3):601-607,7.基金项目
国家自然科学基金项目(U1361208,51574008) （U1361208,51574008）
深部煤矿采动响应与灾害防控安徽省重点实验室开放基金项目(KLDCMERDPC15105) （KLDCMERDPC15105）
