摘要
为提高煤矿井下巷道超前探测水害和构造异常的准确性,利用超前探水的3个钻孔,并将这3个钻孔设计为互成28°的“三角锥”型,利用“三角锥”型观测系统的孔中三维直流电法进行超前探测突水灾害工作。在均质全空间和层状模型条件下设计体状低阻异常和板状低阻异常正演模型,并与传统直流电法超前探测对低阻异常响应特征进行比较。结果可见:①传统直流电法超前探观测系统在均质模型下,对体状低阻异常和板状低阻异常的响应基本相当;但在层状模型中“三角锥”型观测系统对体状异常的响应比传统超前探测系统大几十倍;而“三角锥”型观测系统对板状异常的响应是体状异常响应的数倍;②“三角锥”型观测系统对异常的响应比传统超前探观测系统更强,且对低阻模型产生的响应是传统超前探观测系统的数十倍甚至百倍,更有利于异常信号的获取;③由于电极布置在孔中,“三角锥”型观测系统极大地减小了巷道内各种人文因素对信号的干扰,规避了传统直流电法超前探测存在的问题,是超前探测一个新的解决方案,对均质模型下的简单地质异常体通过弧线交汇法可进行定位,而复杂模型的空间精确定位还有待电阻率三维反演解决。
In order to improve the accuracy of advanced detection of water disaster and structural anomaly in coal mine roadway,three boreholes for advanced water detection are used.These three boreholes are designed as“triangular cone”with 28 degrees each other,and three-dimensional direct current method in the holes of“triangular cone”observation system is used for the advanced detection of water inrush disaster.Under the condition of a homogeneous full-space and layered model,the forward modeling models of bulk low-resistance anomaly and plate low-resistance anomaly are designed,and the response characteristics of the low-resistance anomaly are compared with those of the traditional DC method.The results are as follows:①Under the homogeneous model,the response of the traditional direct current method of advanced observation system to the body-shaped and plate-shaped low-resistance anomalies is almost the same.However,in the layered model,the response of“triangular cone”type observation system to the body-shaped anomaly is dozens of times larger than that of traditional advanced detection system.The response of“triangular cone”type observation system to the plate-shaped anomaly is several times larger than that of the body-shaped anomaly.②The response of“triangular cone”type observation system to anomaly is stronger than that of traditional advanced observation system,and the response to low-resistance model is dozens or even hundreds of times larger than that of traditional advanced observation system,which is more conducive to the acquisition of anomaly signals.③Since the electrodes are arranged in the holes,the“triangular cone”type observation system greatly reduces the interference of various human factors in the roadway to the signal,avoids the problems existing in the traditional DC method of advanced detection,and is a new solution for advanced detection.The simple geologic anomaly body under a homogeneous model can be located by the arc intersection method,while the spatial accurate location of the complex model needs to be solved by three-dimensional resistivity inversion.
作者
周官群
王亚飞
陈兴海
岳明鑫
翟福勤
杨晓冬
吴小平
曹煜
崔颖
ZHOU Guanqun;WANG Yafei;CHEN Xinghai;YUE Mingxin;ZHAI Fuqin;YANG Xiaodong;WU Xiaoping;CAO Yu;CUI Ying(School of Resources and Environmental Engineering,Hefei University of Technology,Hefei 230009,China;School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China;Anhui Huizhou Geology Security Institute Co.,Ltd.,Hefei 231202,China)
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2022年第8期3015-3023,共9页
Journal of China Coal Society
基金
国家自然科学基金资助项目(U2039206,41874084)
安徽省自然科学基金资助项目(2008085QD176)。
关键词
三维直流电法
超前探测
“三角锥”型观测系统
正演模拟
3-D direct current method
advanced detection
“triangular cone”observation system
forward modeling
