煤田地质与勘探2011，Vol.39Issue(6)：11-15,5.DOI:10.3969/j.issn.1001-1986.2011.06.003
节理扩展煤层应力场的联合反演分析
Combined inversion analysis of coal seam stress field considering joint propagation
摘要
Abstract
Joint propagation changes the physical and mechanical properties of coal due to in-site stress, then the redistribution of coal seam stress and deformation is caused, so the calculation method of coal element joints propagation is given, and relationship between joint propagation and stress is analyzed. Application of wavelet neural network and gradual loading algorithm, a methodology of inversion analysis of coal seam stress field is presented, and the distribution regularity of in-site field is studied for Jincheng block in Qinshui basin using combined inversion algorithm. The results show that the block maximum principal stress increases from northwest to southeast, and it ranges from 8 tol3Mpa; the minimum principal stress is located in Southern Jincheng, and the value is about 5-9MPa. Comparison of combined inversion algorithm results with measured values of the key points indicates that the principal stress relative error is only 3%, and azimuth error is less than 1.3°. So combined inversion analysis has higher calculation accuracy and can satisfy the engineering demand, also it has a series of advantages, such as simple model, fast calculating speed, and so on.关键词
节理扩展/煤层应力场/联合反演分析/小波神经网络/逐级加载算法Key words
joint propagation/coal seam stress field/combined inversion analysis/wavelet neural network/gradual loading algorithm分类
天文与地球科学引用本文复制引用
张立松,闫相祯,杨秀娟,杨恒林,王欣..节理扩展煤层应力场的联合反演分析[J].煤田地质与勘探,2011,39(6):11-15,5.基金项目
国家科技重大专项项目(2011ZX05036 （）
2011ZX05037) （）
中央高校基本科研业务费专项资金项目(11 CX04050A) （11 CX04050A）
