- 责任者：Zhang Lisong (College of Pipeline and Civil Engineering ; China University of Petroleum ; Qingdao 266555 ; China) ; Yan Xiangzhen
- 刊名：Coal Geology & Exploration
- 出版年：2011
- 卷期：39(6)
- 关键词：煤储层 ; coal reservoirs ; 节理 ; joints ; 应力场 ; stress fields
- 页码：p.11-15
- 图表：3 illus., 2 tables, 11 refs.
- 分类号：1003
- 出版序号：20122516
- issnNo：ISSN1001-1986
- isbnNo：CN61-1155/P
///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 to13 Mpa. The minimum principal stress is located in southern Jincheng, and the value is about 5~9 MPa.