%0 Journal Article
%T APPROXIMATIVE ANALYSIS OF FRACTURE PROPAGATION DRIVEN BY DETONATION GAS IN OIL WELL<br>油井爆生气体对岩石劈裂作用机制探索
%A CHEN Lijing
%A LI Ning
%A WANG Junqi
%A <br>陈莉静
%A 李宁
%A 王俊奇
%J 岩石力学与工程学报
%D 2006
%I 
%X During fracture propagation driven by detonation gas m Oil well, dynamic response of crack surface under the gas pressure results in fast fracturing. In order to simulate the dynamic fracture process, kinetic energy is introduced into the equation of energy balance to describe the energy relationship during fracture propagation driven by gas pressure. Here, an approximate formula educed by dimensional analysis is presented, which involves fracture velocity and loading rate, to calculate kinetic energy increment. Thus fracture velocity and length can be obtained by iterative solution of energy balance equation in every time step when loading rate is given. In the case study, the results show that when gas pressure rising rate becomes slow, the dynamic response of crack tip to crack development will become weak. So it is obvious that dynamic response greatly influences the ultimate fracture length.
%K rock mechanics
%K detonation gas
%K energy balance
%K dynamic response
%K fracture propagation<br>岩石力学
%K 爆生气体
%K 能量平衡
%K 动态响应
%K 裂缝扩展
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=D3421FAA1A0A0F0C&jid=35E747D791A1346351AFB523B7FA35CB&aid=5A3BFEF35C8CA934&yid=37904DC365DD7266&vid=C5154311167311FE&iid=708DD6B15D2464E8&sid=D0540156A5D11138&eid=594861585BE7463E&journal_id=1000-6915&journal_name=岩石力学与工程学报&referenced_num=0&reference_num=12