| 叠加开采应力及覆岩离层动态变化数值模拟 |
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| 引用本文： | 赵团芝,李文平,李小琴,孙如华,郑志军.叠加开采应力及覆岩离层动态变化数值模拟[J].采矿与安全工程学报,2009,26(1). |
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| 作者姓名： | 赵团芝 李文平 李小琴 孙如华 郑志军 |
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| 作者单位： | 1. 宁波市地质环境监测站,浙江,宁波,315010;中国矿业大学,资源与地球科学学院,江苏,徐州,221116
2. 中国矿业大学,资源与地球科学学院,江苏,徐州,221116 |
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| 摘 要： | 根据工程地质条件及其地应力实测结果,利用离散元法对工作面进行了采前岩体初始地应力状态数值模拟;沿工作面走向剖面上煤层(10,7煤)叠加开采应力场及其上覆岩层离层的动态变化数值模拟,再现了随着工作面推进应力场和离层动态发展的变化规律.并根据模拟结果进行岩浆岩及厚层砂岩能量积聚及动态破坏危险性分区预测分析.结果表明由于10煤先期开采,破坏了7煤煤系地层的原始应力状态,使部分岩层内有较大的应力集中;7煤回采破坏了岩浆岩的极限平衡拱根基,使其产生动力冲击失衡.这一现象恶化了7煤开采的覆岩应力条件,不利于7煤工作面的回采.
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| 关 键 词： | 叠加开采 地应力 覆岩离层 离散单元法 数值模拟 |
Numerical Simulation on Dynamic Changes of Stress and Overburden Bed Separation Concerned with Superimposed Mining |
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| ZHAO Tuan-zhi,LI Wen-ping,LI Xiao-qin,SUN Ru-hua,ZHENG Zhi-jun.Numerical Simulation on Dynamic Changes of Stress and Overburden Bed Separation Concerned with Superimposed Mining[J].Journal of Mining and Safety Engineering,2009,26(1). |
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| Authors: | ZHAO Tuan-zhi LI Wen-ping LI Xiao-qin SUN Ru-hua ZHENG Zhi-jun |
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| Affiliation: | 1.Ningbo Monitoring Station of Geologic Environment;Ningbo;Zhejiang 315010;China;2.School of Resources and Earth Science;China University of Mining & Technology;Xuzhou;Jiangsu 221116;China |
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| Abstract: | According to engineering geological conditions and ground stress measurement results,the Discrete Element Method was used to simulate initial ground stress state of rock mass before the production of working face and to simulate dynamic changes of ground stress field and overburden bed separation concerned with superimposed mining(coal 10,7) along strike profile of working face.This reconstructed the change rules and dynamic development of stress field and bed separation with the advancing of working face.I... |
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| Keywords: | superimposed mining ground stress overburden bed separation Discrete Element Method numerical simulation |
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