| 煤层围岩破裂过程中的自然电位响应 |
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| 引用本文： | 吴超凡,刘盛东,杨胜伦,路拓,王勃.煤层围岩破裂过程中的自然电位响应[J].煤炭学报,2013,38(1):50-54. |
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| 作者姓名： | 吴超凡 刘盛东 杨胜伦 路拓 王勃 |
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| 作者单位： | 1.龙岩学院 资源工程系，福建 龙岩 364012；;
2.中国矿业大学 深部岩土力学与地下工程国家重点实验室，江苏 徐州 221008 |
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| 基金项目： | 国家“十二五”科技支撑计划课题资助项目(2011BAK07B02 )；国家自然科学基金资助项目（51004102）；福建省自然科学基金资助项目(2010J01262) |
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| 摘 要： | 煤层开采过程中，围岩破裂伴有电子逃逸现象，引起自然电场的变化。通过建立数值模型与设计岩层开采模拟实验，发现岩层裂隙发育部位自然电位降低，且裂隙发育越完全电位越低；岩层压缩区自然电位升高。煤矿开采过程实际监测发现：在煤层顶板“三带”中，垮落带自然电位低，且变化比较稳定；断裂带自然电位表现较为不稳定，变化频繁；弯曲下沉带表现为高电位，且极为稳定，变化较小。
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| 关 键 词： | 围岩破裂 自然电位 电法勘探 |
| 收稿时间： | 2012-01-04 |
| 修稿时间： | 2012-05-26 |
Natural potential response during the coal rock failure process |
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| WU Chao-fan,LIU Sheng-dong,YANG Sheng-lun,LU Tuo,WANG Bo.Natural potential response during the coal rock failure process[J].Journal of China Coal Society,2013,38(1):50-54. |
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| Authors: | WU Chao-fan LIU Sheng-dong YANG Sheng-lun LU Tuo WANG Bo |
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| Affiliation: | 1.School of Resource Engineering,Longyan University,Longyan 364012,China;2.State Key Laboratory of Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221008,China;3.School of Resources and Earth Sciences,China University of Mining and Technology,Xuzhou 221008,China;4.Anhui Huizhou Institute of Subterranean Calamity,Hefei 230088,China) |
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| Abstract: | In wall rock failure process，the electronic escape phenomenon normally occurs，which causes the change of the natural electric field in the coal rock.Through the establishment of a numerical model and design of a rock mining simulation experiment，the authors found the natural electrical potential of rock at crack development site is reduced，and it is much lower with a full fracture development，while the natural electrical potential increases at rock compression area.The findings in the monitoring in coal mine mining demonstrate that in the three zones of seam roof，the natural electrical potential is low and stable at caving zone；more unstable and frequent alternation at crack development zone；high，stable and less changes at bending sink zone.Natural electrical potential alternation plays a guiding role and has practical significance for determining the fracture development level and scope of fracture zones at coal seam floor and roof. |
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| Keywords: | rock failure natural potential electrical detection |
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