本文選題：直流三極法　切入點：聚焦鉆孔直流電法　出處：《山東科技大學(xué)》2017年碩士論文

【摘要】：礦井在建設(shè)和生產(chǎn)過程中,礦井水災(zāi)是常見的煤礦主要災(zāi)害之一,巷道掘進面突水問題更是非常嚴峻。一旦發(fā)生突水,極有可能淹沒采區(qū)和礦井,甚至造成人員傷亡,危害十分嚴重。因此,在巷道掘進之前對掌子面前方進行超前探測,是保證礦井安全生產(chǎn)的必要工作之一。但是,井下巷道工作范圍有限、條件復(fù)雜,并且存在許多干擾因素,比如巷道內(nèi)的電性異常體、地層、巷道空間以及旁側(cè)干擾等。這些干擾因素嚴重影響了超前探測效果,對前方地質(zhì)異常體的判斷出現(xiàn)偏差。本文針對以上超前探測過程中存在的問題,查閱了大量的國內(nèi)外文獻,分析了直流電法超前探測原理,重點研究了聚焦鉆孔直流電法超前探測方法,該方法通過在掌子面布置上下兩個供電電極,,并在掌子面前方鉆孔內(nèi)布置測量電極來進行超前探測,可有效屏蔽巷道后方以及旁側(cè)不良電性異常體對于超前探測的干擾。首先分析了與直流電法相關(guān)的基本原理,研究了全空間條件下存在層狀介質(zhì)及球狀介質(zhì)點電源場的電位分布解析解。建立了巷道前方存在低阻板狀異常體時不同布極方式的地電模型,分別研究其布極特點及原理;其次,運用有限差分方法對全空間點電源場電位分布進行數(shù)值計算;然后,分別運用不同布極方式的直流電法超前探測對于地電模型進行正演研究,對比分析了不同探測方式下所得出的視電阻率曲線,突出了聚焦鉆孔直流電法對于前方異常體更為靈敏;最后,建立巷道旁側(cè)干擾體與前方異常體并存時的地電模型,針對巷道旁側(cè)異干擾體深度、電阻率以及與掌子面間的水平距離三種影響因素進行模擬分析,進一步對比分析常規(guī)巷道直流三極法和聚焦鉆孔直流電法兩種超前探測方式,結(jié)果表明在聚焦鉆孔直流電法超前探測受巷道旁側(cè)干擾體影響較小,更為靈敏準確。
[Abstract]:In the process of mine construction and production, mine flood is one of the most common disasters in coal mines, and the water inrush problem of roadway excavation surface is even more severe. Once water inrush occurs, it is very likely to flood mining areas and mines, and even cause casualties. The harm is very serious. Therefore, it is one of the necessary work to ensure the safe production of mine before tunneling. However, the working scope of underground roadway is limited, the working conditions are complex, and there are many interference factors. For example, electrical anomalies in the roadway, strata, roadway space and side interference. These interference factors seriously affect the effect of advanced detection. There is a deviation in the judgment of the geological anomaly body in front. In view of the problems existing in the process of advanced detection above, this paper has consulted a large number of domestic and foreign literature and analyzed the principle of advanced detection by direct current method. This paper focuses on the advanced detection method of focusing borehole direct current (DC) method. This method can be used to detect ahead by arranging two power supply electrodes up and down on the palm surface, and arranging the measuring electrodes in the hole in front of the palm surface. It can effectively shield the interference of the abnormal body in the rear and the side of the roadway to the advanced detection. Firstly, the basic principles related to the direct current method are analyzed. In this paper, the analytical solution of the potential distribution of the power source field of layered medium and spherical dielectric point in the whole space is studied, and the geoelectric model of different patterns of electrode placement in front of roadway with low resistance plate shape anomaly is established, and the characteristics and principle of the distribution of the electrode are studied respectively. Secondly, the finite difference method is used to numerically calculate the field potential distribution of the whole space point power supply, and then the forward modeling of the geoelectric model is studied by using different direct current method in advance detection. The apparent resistivity curves obtained under different detection methods are compared and analyzed, which highlights that the focusing borehole direct current method is more sensitive to the outliers in front. Finally, the geoelectric model of the side interference and the anomaly in front of the roadway is established. This paper simulates and analyzes three kinds of influencing factors, such as depth of side side of roadway, resistivity and horizontal distance between side of roadway and palmface, and further compares and analyzes two kinds of advanced detection methods: conventional DC tripole method and focused drilling direct current method. The results show that the advance detection by focusing borehole DC method is less affected by the side interference of roadway and is more sensitive and accurate.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD745.2

【參考文獻】

相關(guān)期刊論文 前10條

1 王運彬;于師建;;孔內(nèi)直流電法超前探測正演模擬研究[J];煤炭技術(shù);2017年03期

2 崔丹;;物探方法在資源勘查中的應(yīng)用探討[J];黑龍江科技信息;2017年03期

3 劉志民;韓雷;張偉杰;劉希高;吳淼;;坑道聚焦雙頻激電法探測技術(shù)[J];煤炭學(xué)報;2016年12期

4 岳建華;薛國強;;中國煤炭電法勘探36年發(fā)展回顧[J];地球物理學(xué)進展;2016年04期

5 王士黨;楊沖;鐘聲;;采空區(qū)探測方法的選擇[J];煤炭技術(shù);2015年09期

6 李飛;劉德民;張景鋼;高林生;潘建旭;;基于最小二乘的礦井電法超前探測聯(lián)合反演方法研究[J];煤礦安全;2014年06期

7 董浩;魏文博;葉高峰;金勝;景建恩;;基于有限差分正演的帶地形三維大地電磁反演方法[J];地球物理學(xué)報;2014年03期

8 馬櫻燕;白燕;;礦井物探技術(shù)在突水預(yù)測中的應(yīng)用[J];科技創(chuàng)新與應(yīng)用;2013年34期

9 張超;;高密度電測深法在工程勘察中的應(yīng)用[J];工程地球物理學(xué)報;2013年02期

10 陳新;杜建有;;礦井直流電法超前探測在巷道掘進的應(yīng)用[J];礦業(yè)裝備;2012年09期

相關(guān)重要報紙文章 前1條

1 ;我國煤炭行業(yè)挑戰(zhàn)與機遇并存[N];國家電網(wǎng)報;2008年

相關(guān)博士學(xué)位論文 前2條

1 姚勝偉;幾類共軛梯度算法的研究[D];華東理工大學(xué);2014年

2 張力;坑道直流聚焦超前探測有限元數(shù)值模擬研究[D];中南大學(xué);2011年

，

本文編號：1698944