CO_2致裂增透机理及影响因素模拟分析

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英文篇名：Simulation analysis of CO_2 fracturing and anti-reflection mechanism and its influencing factor 作者：张兵兵 ; 崔晓荣 ; 陈晶晶 英文作者：Zhang Bingbing;Cui Xiaorong;Chen Jingjing;Hongda Blasting Co.,Ltd.; 关键词：地应力 ; 煤层裂隙 ; 普氏系数 ; CO2致裂增透 ; 数值模拟 英文关键词：ground stress;;coal seam fissure;;Protodyakonov coefficient;;CO2 fracturing and anti-reflection;;numerical simulation 中文刊名：ZGME 英文刊名：China Coal 机构：宏大爆破有限公司; 出版日期：2019-01-22 出版单位：中国煤炭 年：2019 期：v.45;No.510 语种：中文; 页：ZGME201901029 页数：6 CN：01 ISSN：11-3621/TD 分类号：125-130

摘要

分析了CO_2致裂增透机理,总结出CO_2致裂增透技术的优点,通过建立地应力与煤层裂隙扩展相互作用力学模型,推导出煤层裂隙与应力之间的关系公式。在此基础上,采用FLAC3D数值模拟软件模拟了地应力及煤体普氏系数对致裂半径的影响规律。数值模拟结果表明,垂直应力越大,裂隙扩展范围越小;煤体普氏系数越大,裂隙扩展范围越大。
        The authors analyzed CO_2 fracturing and anti-reflection mechanism and obtained the advantages of CO_2 fracturing and anti-reflection technology,deduced the relation formula between the coal seam fissure and the stress by establishing a mechanical model of the interaction between the ground stress and the seam fissure extension.Based on the achievement,the influence of the ground stress and the coal Protodyakonov coefficient on the fracturing radius was simulated by FLAC3 Dnumerical simulation software.The results showed that the larger the vertical stress,the smaller the fissure extension range,and the larger the coefficient of coal,the greater the fissure extension range.

引文

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