王公忠,张袁娟,王幸荣,王凤凰,李梅

• 1:河南工程学院安全工程学院
• 2:武汉理工大学资源与环境工程学院
• 3:湖北宜化集团矿业有限责任公司

摘要(Abstract)：

针对平煤十一矿回采工作面卸压爆破合理孔径确定问题,基于实验室测定工作面的煤岩体材料参数,结合实际工况,用分析软件LS-DYNA分别对孔径30 mm、40 mm、60 mm和80 mm工况的区卸压松动爆破进行数值模拟。数值模拟结果表明:四种工况下,裂隙半径最大为1.211 m;最大主应力历程曲线随着孔径的增大,爆破作用时间明显增大。通过裂隙半径结合最大主应力分析,得出该煤矿卸压爆破合理孔径为60 mm;根据确定的爆破孔径在现场进行效果考察,工作面前方的应力集中区向深部转移;消除了工作面前方局部应力集中现象。

关键词(KeyWords)： 煤矿;数值模拟;LS-DYNA;冲击地压;裂隙半径;最大主应力

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51104111);; 河南工程学院博士基金(D2013022);; 河南省教育厅科学技术研究重点项目(14B440005);; 郑州市科技攻关项目(141PPTGG375)

作者(Author): 王公忠,张袁娟,王幸荣,王凤凰,李梅

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