电磁辐射监测冲击矿压灾害危险
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摘要
岩石冲击破裂过程中 ,裂缝的形成和颗粒的摩擦会产生电磁辐射。煤岩体的电磁辐射是由于非均质煤岩体在应力作用下非均匀变速变形及裂纹形成与扩展过程中 ,内部电荷的迁移而产生。实验室研究了强冲击煤样破坏前后的电磁辐射规律 ,得到煤体应力越大 ,变形破裂越强烈 ,电磁辐射信号也越强 ;确定了煤样冲击破坏的电磁辐射预警值 ;提出了临界指标法、偏差法等监测冲击矿压危险的电磁辐射方法。采用KBD5矿用本安型冲击矿压电磁辐射监测仪对某矿具有严重冲击危险的四层煤工作面进行了矿震和冲击矿压危险监测 ,有效地预测了多次冲击危险 ,取得了良好的效果。
Electromagnetic Emission (EME) is caused by crack expands and friction of granule during rock and coal burst failure. EME occurred when inhomogeneous coal or rock is loaded at uneven speed with the moving of internal electrical charges during the development of cracks. Laboratory test indicates the higher the stress in specimen and the more obvious the breaking are,the stronger EME signal will be,which can be used to determine the critical value,The paper presents a method of monitoring the dangerous degree of rock burst by critical index and its deviation value. In the given example,a new apparatus KBD5 is used to monitor the danger of rock burst in seam No.4 of a coal mine with successful forecasts and good effects many times.
Electromagnetic Emission (EME) is caused by crack expands and friction of granule during rock and coal burst failure. EME occurred when inhomogeneous coal or rock is loaded at uneven speed with the moving of internal electrical charges during the development of cracks. Laboratory test indicates the higher the stress in specimen and the more obvious the breaking are,the stronger EME signal will be,which can be used to determine the critical value,The paper presents a method of monitoring the dangerous degree of rock burst by critical index and its deviation value. In the given example,a new apparatus KBD5 is used to monitor the danger of rock burst in seam No.4 of a coal mine with successful forecasts and good effects many times.
引文
[1]窦林名,何学秋由煤岩变化破坏引起的电磁辐射[J]清华大学学报,2001,41(12):8688
[2]窦林名,何学秋冲击矿压防治理论与技术[M ]徐州:中国矿业大学出版社,2001
[3]何学秋,刘明举含瓦斯煤岩破坏电磁动力学[M ]徐州:中国矿业大学出版社,1995
[4]窦林名,何学秋采矿地球物理学[M ]北京:中国科学文化出版社,2002
[5]DouLinming,XuFandjun,ZhangXiufengEMErockburstmoni toringinCoalMineHuafeng[A]InternationalScientificTechni calSymposiumRockburst2002ResearchandPreventionSystemsProceedings,Ustron,Poland,2002,11,1215:261267
[6]何学秋含瓦斯煤岩流变动力学[M ]徐州:中国矿业大学出版社,1995
[7]王恩元,何学秋煤岩变形破坏电磁辐射的实验研究[J]地球物理学报,2000,43(1):131137
[8]钱书清,任克新,吕智伴随岩石破裂的VLF、MF、HF和VHF电磁辐射特性的实验研究[J]地震学报,1996,18(3):346351
[9]郭自强,周大庄,施行觉,等岩石破裂中的电子发射[J]地球物理学报,1988,31(5):566571
[10]郭自强,郭子祺,钱书清,等岩石破裂中的声电效应[J]地球物理学报,1999,42(1):7483
[11]窦林名煤岩突变的声电效应规律及其应用研究[D]博士后研究报告,中国矿业大学,2001
[12]窦林名,曹其伟,何学秋,王恩元冲击矿压危险的电磁辐射监测技术[J]矿山压力与顶板管理,2002,19(4):8991,98
[2]窦林名,何学秋冲击矿压防治理论与技术[M ]徐州:中国矿业大学出版社,2001
[3]何学秋,刘明举含瓦斯煤岩破坏电磁动力学[M ]徐州:中国矿业大学出版社,1995
[4]窦林名,何学秋采矿地球物理学[M ]北京:中国科学文化出版社,2002
[5]DouLinming,XuFandjun,ZhangXiufengEMErockburstmoni toringinCoalMineHuafeng[A]InternationalScientificTechni calSymposiumRockburst2002ResearchandPreventionSystemsProceedings,Ustron,Poland,2002,11,1215:261267
[6]何学秋含瓦斯煤岩流变动力学[M ]徐州:中国矿业大学出版社,1995
[7]王恩元,何学秋煤岩变形破坏电磁辐射的实验研究[J]地球物理学报,2000,43(1):131137
[8]钱书清,任克新,吕智伴随岩石破裂的VLF、MF、HF和VHF电磁辐射特性的实验研究[J]地震学报,1996,18(3):346351
[9]郭自强,周大庄,施行觉,等岩石破裂中的电子发射[J]地球物理学报,1988,31(5):566571
[10]郭自强,郭子祺,钱书清,等岩石破裂中的声电效应[J]地球物理学报,1999,42(1):7483
[11]窦林名煤岩突变的声电效应规律及其应用研究[D]博士后研究报告,中国矿业大学,2001
[12]窦林名,曹其伟,何学秋,王恩元冲击矿压危险的电磁辐射监测技术[J]矿山压力与顶板管理,2002,19(4):8991,98
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