煤矿安全2017，Vol.48Issue(5)：177-179,183,4.DOI:10.13347/j.cnki.mkaq.2017.05.049
煤层注浆压裂裂隙形成规律数值模拟
Numerical Simulation of Fractures Formation Laws in Coal Seam Grouting Fracturing
摘要
Abstract
In order to better understand the cracks producing laws of coal seam in grouting fracturing under different confining pressure,we establish a two-dimensional model of stress and strain through RFPA-flow software to simulate fractures initiation,propagation until the model instability of the whole injection process of coal seam in different confining pressure.The results show that in the grouting fracturing process of coal seam,changing confining pressure directly affects the initial fracture pressure and buckling pressure of the coal,and there is a positive correlation between them;with the increase of confining pressure,grouting stress is concentrated around the hole and crack generation becomes more difficult;the slurry flow will also become difficult,and grouting effect is ineffective.关键词
煤层注浆/围压/裂隙特征/注浆效果/注浆压裂Key words
coal seam grouting/confining pressure/fracture feature/grouting effect/grouting fracturing分类
矿业与冶金引用本文复制引用
刘超,程成..煤层注浆压裂裂隙形成规律数值模拟[J].煤矿安全,2017,48(5):177-179,183,4.基金项目
国家自然科学基金青年科学基金资助项目(51304154) （51304154）
陕西省青年科技新星资助项目(2016KJXX-37) （2016KJXX-37）
陕西省教育厅基金资助项目(16JK1487) （16JK1487）
