采矿与安全工程学报
採礦與安全工程學報
채광여안전공정학보
JOURNAL OF MINING AND SAFETY ENGINEERING
2013年
3期
468-474
,共7页
煤火%探测%高密度电法%温纳装置%复合对称四极装置
煤火%探測%高密度電法%溫納裝置%複閤對稱四極裝置
매화%탐측%고밀도전법%온납장치%복합대칭사겁장치
coal fires%detection%high-density electrical method%wenner α array type%wenner-schlumberger array type
通过建立煤火的地电模型,采用有限差分法对温纳等5种装置进行正演模拟,在对正演数据加入噪声干扰后,采用高斯-牛顿迭代法进行迭代求解反演。反演结果表明:火区燃烧中心、烧空区和冒落带在5种装置的视电阻率拟断面图上均反映出了异常;复合对称四极装置对火区燃烧中心的分辨效果最好,温纳装置对烧空区和冒落带的分辨效果最好。采用以上2种装置类型对某火区进行了高密度电法探测,准确的分辨出了该火区的燃烧中心、烧空区和冒落带。研究成果为煤田火灾的准确探测提供了相应的理论基础和参考。
通過建立煤火的地電模型,採用有限差分法對溫納等5種裝置進行正縯模擬,在對正縯數據加入譟聲榦擾後,採用高斯-牛頓迭代法進行迭代求解反縯。反縯結果錶明:火區燃燒中心、燒空區和冒落帶在5種裝置的視電阻率擬斷麵圖上均反映齣瞭異常;複閤對稱四極裝置對火區燃燒中心的分辨效果最好,溫納裝置對燒空區和冒落帶的分辨效果最好。採用以上2種裝置類型對某火區進行瞭高密度電法探測,準確的分辨齣瞭該火區的燃燒中心、燒空區和冒落帶。研究成果為煤田火災的準確探測提供瞭相應的理論基礎和參攷。
통과건립매화적지전모형,채용유한차분법대온납등5충장치진행정연모의,재대정연수거가입조성간우후,채용고사-우돈질대법진행질대구해반연。반연결과표명:화구연소중심、소공구화모락대재5충장치적시전조솔의단면도상균반영출료이상;복합대칭사겁장치대화구연소중심적분변효과최호,온납장치대소공구화모락대적분변효과최호。채용이상2충장치류형대모화구진행료고밀도전법탐측,준학적분변출료해화구적연소중심、소공구화모락대。연구성과위매전화재적준학탐측제공료상응적이론기출화삼고。
In this paper, the geo-electricity model of coal fires were established, and the forward modelings of Wenner α, dipole-dipole, Wenner-Schlumberger, pole-pole and pole-dipole were carried out by using the finite difference method. After adding noise interference into the forward data, the in-version was implemented to get the sectional drawing of apparent resistivity by using Gauss-Newton it-eration method. The inversion results show that all the burning center, burned cave and loose zone pre-sent abnormalities in the sectional drawings of apparent resistivity of the five array types, while Wenner-Schlumberger array has the best effect in distinguishing the burning center, and the Wennerαarray has the best effect in distinguishing the burned cave and loose zone. Moreover, the two array types mentioned above were applied to carry out high-density electrical detection in one fire zone, and the burning center, burned cave and loose zone were distinguished accurately. The research results provide theoretical basis and reference for the accurate detection of coal fires.