摘要
煤体变形程度控制着煤与瓦斯突出和煤层气的可开发性,煤体结构空间展布预测是人们长期关注的焦点。以岩体力学和分形几何学基本理论为指导,以安阳矿区双全井田为例,通过计算岩体强度因子和分形维数,系统探讨了岩性结构对煤体变形的影响。研究表明,岩体强度因子和分形维数与断层和测井曲线判识的煤体结构之间存在密切关系:低强度因子和分形维数区,煤体易发生韧性变形,软煤发育;高强度因子和分形维数区,煤体(和岩体)以脆性变形为主,以断层发育为特征。这一结论为井田构造发育特征和软煤空间展布所证实。岩体力学和分形几何学的引入,为煤体结构空间展布区域预测提供了一种新途径。
The coal and gas outburst and coalbed methane producibility are controlled by coal deformation. The spatial distribution of coal with different deformation has been widely investigated up to now. Based on the theories of rock mass mechanics and fractal geometry, the strength coefficient of rockmass and fractal dimension are calculated in the Shuangquan mine of Anyang mining area. The relationship among the strength coefficient of rockmass, fractal dimension, and coal deformation are discussed. It suggested that the coal ductile deformation is generally concentrated in the area with low strength coefficient of rockmass and fractal dimension. Coal and gas outburst is intense and coalbed methane development is difficult in this area. The brittle deformation of coal and coal bearing sequence is mainly concentrated in the area with high strength coefficient of rockmass and fractal dimension. The faults are well developed in this area. This conclusion is supported by the distribution of faults and deformed coal. The rock mass mechanics and fractal geometry provide a new approach for the regional prediction of coal structure spatial distribution.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2008年第1期1-4,共4页
Coal Geology & Exploration
基金
国家重点基础研究发展计划(973计划)项目(2002CB211705)
国家自然科学基金项目(50534070)
河南省自然科学基金项目(0611023500)
关键词
岩性结构
煤体变形
岩体强度因子
分形维数
煤与瓦斯突出
lithological structure
coal deformation
strength coefficient of rockmass
fractal dimension
coal and gas outburst
