@Article{iasc.2020.010136,
AUTHOR = {JiangtaoLi},
TITLE = {Numerical Simulation Study on the Regularity of CIS Bedding Hydraulic  Fracturing Based on 3D Penny-Shape Model},
JOURNAL = {Intelligent Automation \& Soft Computing},
VOLUME = {26},
YEAR = {2020},
NUMBER = {5},
PAGES = {1047--1061},
URL = {http://www.techscience.com/iasc/v26n5/40824},
ISSN = {2326-005X},
ABSTRACT = {In view of poor permeability of coal seam and soft coal quality in 
China's coal mining area, a point hydraulic fracturing method suitable for the 
occurrence characteristics of coal seam is put forward based on the characteristics 
of coal seam hydraulic fracturing and the field practical experience of coal seam 
hydraulic fracturing for many years. A theoretical and mathematical model of 
hydraulic fracturing is established. Based on the large-scale finite element 
software ABAQUS, numerical simulation of two dimensional and three 
dimensional hydraulic fracturing is carried out, and the fracture propagation law 
and its parameter sensitivity of coal seam point hydraulic fracturing are simulated 
and analyzed. The results show that when multi point synchronous hydraulic 
fracturing on the same layer borehole is carried out, there will be a certain 
coherence effect between fracture cracks when the interval between fracturing 
points is small. In the same fracturing time, the minimum effective stress in the 
coal body between the cracks will be reduced by about 10% when the gap between 
the cracks increase by 25%. We can use the fluctuation of effective stress field 
around fracture before and after fracturing as a discriminant index for effective 
radius of hydraulic fracturing. In general, it is advisable to have 10%~20% 
amplitude of effective stress field before and after fracturing.},
DOI = {10.32604/iasc.2020.010136}
}