SOTEM法分量探测能力对比及应用实例

doi:10.11720/wtyht.2025.0183

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摘要

为了验证SOTEM在复杂地形条件下煤矿防治水中的应用效果,本文利用SOTEM方法模拟分析了H_z分量与E_x分量对地层的探测能力,并在贵州黔北地区某煤矿开展了试验工作,本次试验布置4条剖面,用SOTEMSoft软件进行反演,并对反演结果进行了钻探验证。试验结果表明:在赤道向测量时H_z分量具有较强的探测低阻异常体的能力;E_x分量能探测低阻异常体和高阻异常体且探测能力相当,探测低阻体时沿赤道向测量,探测高阻体时沿轴向测量。SOTEM法能在复杂地形条件下精准定位煤矿水害集中区域,试验证明了SOTEM法在贵州黔北地区煤矿防治水中的适用性及准确性。

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	潘远
	罗聪
	徐林
	陈品雄
	傅宏毅

关键词 ： SOTEM, 短偏移距, 电性源, 煤矿水害

Abstract：

This study aims to demonstrate the effects of the electric-source short-offset transient electromagnetic method(SOTEM) for water hazard prevention and control in coal mines under complex topographical conditions.To this end,the detection capabilities of the H_x and E_x components were simulated and analyzed using the SOTEM method,along with field tests in a coal mine in northern Guizhou.During the tests,four profiles were arranged and the SOTEMSoft software was used for inversion, with the inversion results verified by drilling.The results show that during measurement along the equatorial direction,the H_z component exhibited a high capability to detect low-resistivity anomalies.In contrast,the E_x component exhibited a comparable capability in detecting both low-resistivity(along the equatorial direction) and high-resistivity anomalies(along the axial direction).The SOTEM technique can accurately locate the most severe water hazard areas in coal mines under complex topographical conditions.The feasibility and accuracy of the SOTEM method for water hazard prevention and control were validated through the application in coal mines in northern Guizhou.

Key words： short-offset transient electromagnetic method(SOTEM) short-offset electric source water hazards in coal mine

收稿日期: 2025-06-03 修回日期: 2025-07-30 出版日期: 2025-10-20

ZTFLH:

P631.4

基金资助:贵州省科技计划项目(黔科合平台KXJZ[2024]003)

通讯作者: 罗聪(1985-),男,高级工程师,主要从事电磁法正反演研究工作。Email:249288584@qq.com

作者简介: 潘远(1986-),男,工程师,主要从事地球物理勘查工作。Email:75681551@qq.com

引用本文:

潘远, 罗聪, 徐林, 陈品雄, 傅宏毅. SOTEM法分量探测能力对比及应用实例[J]. 物探与化探, 2025, 49(5): 1164-1172.
PAN Yuan, LUO Cong, XU Lin, CHEN Pin-Xiong, FU Hong-Yi. Comparison of component detection capabilities using the short-offset transient electromagnetic method and an application example. Geophysical and Geochemical Exploration, 2025, 49(5): 1164-1172.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2025.0183 或 https://www.wutanyuhuatan.com/CN/Y2025/V49/I5/1164

Fig.1 SOTEM赤道向装置示意

Fig.2 SOTEM轴向装置示意

Fig.3 正演模拟示意

Fig.4 垂直磁场不同时刻的平面分布

Fig.5 水平电场不同时刻的平面分布

Fig.6 各种地电模型示意

Fig.7 均匀半空间赤道向测量反演结果对比

Fig.8 H型地层赤道向测量反演结果对比

Fig.9 K型地层轴向测量反演结果对比

系	统	组	段	厚度/m	岩性描述	电阻率/Ω·m
第四系				0~34.30	黏土、砂土、泥砾、砂砾等	50~600
三叠系	下统	夜郎组	T₁y³	>200	粉砂岩为主	100~300
			T₁y²	$201.92 ~ 285.10 256.09$	粉砂质泥岩、灰岩、薄层石灰岩	500~1200
			T₁y¹	$5.94 ~ 17.94 11.56$	粉砂岩、泥岩、粉砂质泥岩夹泥灰岩	100~300
二叠系	乐平统	长兴组	P₃c	$19.30 ~ 26.72 20.99$	石灰岩为主	300~1200
	乐平统	龙潭组	P₃l	$129.32 ~ 161.37 138.46$	粉砂岩、泥岩、细砂岩、灰岩、炭质泥岩及煤层	30~150
	阳新统	茅口组	P₂m	>100	石灰岩	800~7000

Table 1 矿区地层简表

Fig.10 工程布置

Fig.11 SOTEM赤道向试验线电阻率断面

Fig.12 SOTEM轴向试验线电阻率断面

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