摘要
基于分形理论,研究了单轴压缩条件下乌鲁木齐地区白土窑煤矿煤层顶板砂岩破裂的分形特征。研究结果表明:在单轴压缩条件下,随着轴向应力的不断增加,砂岩试件表面的裂隙数目、长度宽度均在逐渐增加;泥质砂岩和细粒砂岩在轴向应力增加时裂隙发育和扩展的特征存在一定的差异性;分形维数可用来定量地表征单轴压缩条件下砂岩变形破坏过程的演化规律,且建立了不同荷载与分形维数之间的映射关系模型。
Fractal characteristics of sandstone fracture in roof of Baituyao Coal Mine in Urumqi under umaxial compression were studied based upon fractal theory. The results showed that under the condition of uniaxial compression, the amount, length and width of the fractures on the surface of sandstone test-piece were increasing with increase of axial stress; the fissures develop- ment and propagation characteristics of argillaceous sandstone and post stone were different with increase of axial stress; fractal dimension could be taken as a quantitative parameter to describe the evolution law for the process of sandstone deformation and fracture, and mapping relation between fractal dimension and loading conditions was established.
作者
陈凯
王文科
郭新
邵丹
张紫昭
贺根义
Chen Kai Wang Wenke Guo Xin ShaG Dan Zhang Zizhao He Genyi(College of Geology ＆ Mining Engineering, Xinjiang University, Urumqi, Xinjiang 830046, China School of Environmental Science and Engineering, Chang＇an University, Xi＇an, Shaanxi 710054, China School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, J iangsu 221116, China No. 2 Hydrological Engineering Geological Brigade of Xinjiang Geological and Mineral Resources Prospecting Development Bureau, Changji, Xinjiang 831100, China)
出处
《中国煤炭》
北大核心
2017年第2期52-55,共4页
China Coal
基金
新疆维吾尔自治区引进高层次人才及"天山学者"启动基金资助
中国地质调查局项目资助(1212011120477)
新疆大学2016年大学生创新训练计划项目(201610755066)
关键词
煤层顶板
砂岩破裂
单轴压缩
变形破坏
分形特征
盒维数
乌鲁木齐矿区
白土窑煤矿
seam roof, sandstone fracture, uniaxial compression, deformation and failure, fractal characteristics, box di- mension, Urumqi mining area, Baituyao Coal Mine
