散体充填材料压实力学特性的宏细观研究
发布时间：2018-11-21 13:41
【摘要】：为提高西部矿区散体充填材料的抗压性能,采用扫描电子显微镜技术、图像处理技术以及颗粒流数值模拟相结合的方法,研究散体充填材料的细观参数与宏观应变量之间的关系。通过选取颗粒等效粒径、颗粒形状系数、颗粒定向度、表观孔隙率、连通率和颗粒接触关系等6个指标对散体充填材料的形态特征、孔隙特征、接触特征进行了细观量化分析;通过PFC数值模拟对散体充填材料细观参数与宏观压实力学特性的相关性进行了模拟研究,结果表明:颗粒摩擦因数和颗粒孔隙率是散体充填材料宏观应变量的主控参数。基于西部矿区散体充填材料的细观结构,从减少充填材料孔隙率和增大充填材料摩擦性两方面出发,对其进行优化,并将优化后的散体充填材料在陕北常兴煤矿3101工作面进行工业性试验,实测地表最大下沉量为15 mm,最大水平变形为0.8 mm/m,地表沉陷得到有效控制。
[Abstract]:In order to improve the compressive performance of bulk filling materials in western mining area, scanning electron microscopy (SEM), image processing and numerical simulation of particle flow were adopted. The relationship between macro-strain and meso-parameters of bulk filling materials is studied. The morphology, pore characteristics and contact characteristics of granular filling materials were analyzed by selecting six indexes, such as equivalent particle size, particle shape coefficient, particle orientation, apparent porosity, connectivity and particle contact relationship. The correlation between microscopic parameters and macroscopic compaction mechanical properties of bulk filling materials is simulated by PFC numerical simulation. The results show that particle friction coefficient and particle porosity are the main control parameters of macro strain of bulk filling materials. Based on the mesoscopic structure of bulk filling material in the west mining area, the porosity of filling material is reduced and the friction property of filling material is increased. The optimized bulk filling material is tested in 3101 face of Changxing Coal Mine in Northern Shaanxi Province. The measured maximum subsidence is 15 mm, and the maximum horizontal deformation is 0. 8 mm/m,.
【作者单位】： 中国矿业大学矿业工程学院;中国矿业大学深部煤炭资源开采教育部重点实验室;
【基金】：国家重点基础研究发展计划(973)资助项目(2013CB227905) 江苏特聘教授资助项目(苏教师(2015)29号) “青蓝工程”资助项目(苏教师(2014)23号)
【分类号】：TD823.7
[Abstract]:In order to improve the compressive performance of bulk filling materials in western mining area, scanning electron microscopy (SEM), image processing and numerical simulation of particle flow were adopted. The relationship between macro-strain and meso-parameters of bulk filling materials is studied. The morphology, pore characteristics and contact characteristics of granular filling materials were analyzed by selecting six indexes, such as equivalent particle size, particle shape coefficient, particle orientation, apparent porosity, connectivity and particle contact relationship. The correlation between microscopic parameters and macroscopic compaction mechanical properties of bulk filling materials is simulated by PFC numerical simulation. The results show that particle friction coefficient and particle porosity are the main control parameters of macro strain of bulk filling materials. Based on the mesoscopic structure of bulk filling material in the west mining area, the porosity of filling material is reduced and the friction property of filling material is increased. The optimized bulk filling material is tested in 3101 face of Changxing Coal Mine in Northern Shaanxi Province. The measured maximum subsidence is 15 mm, and the maximum horizontal deformation is 0. 8 mm/m,.
【作者单位】： 中国矿业大学矿业工程学院;中国矿业大学深部煤炭资源开采教育部重点实验室;
【基金】：国家重点基础研究发展计划(973)资助项目(2013CB227905) 江苏特聘教授资助项目(苏教师(2015)29号) “青蓝工程”资助项目(苏教师(2014)23号)
【分类号】：TD823.7
【相似文献】
相关期刊论文 前10条
1 ;充填材料的性质[J];有色矿山;1974年02期
2 王世宽;电缆接线盒的新型充填材料[J];煤矿安全;1976年04期
3 ;利用粉煤灰作矿井采煤工作面充填材料的试验研究[J];电力建设;1985年12期
4 陈深;;苏联有色、稀有、贵重金属采矿技术操作规程(绩) 第六篇 充填作业[J];有色金属(冶炼部分);1954年04期
5 ;古远部矿山的下向开采和充填材料[J];有色矿山;1974年05期
6 ;电厂粉煤灰作井下充填材料[J];四川电力技术;1981年02期
7 戴魁文;;新型壁后充填材料的试验研究[J];煤炭科学技术;1988年06期
8 王彩根;利用矸石粉作巷道支架壁后充填材料的研究与应用[J];江苏煤炭;1993年02期
9 黄国纲;黄伯儒;;高水充填材料护巷技术在平一矿的试验及经济效果分析[J];煤炭科学技术;1993年09期
10 孙恒虎，宋存义;高水充填材料热焓分析[J];中国矿业大学学报;1994年03期
相关会议论文 前6条
1 麦穗;凌均h，
本文编号：2347135
本文链接：https://www.wllwen.com/kejilunwen/kuangye/2347135.html
