DC detection method in mined-out water accumulated area of mine
A detection method and a technology for waterlogged areas, applied in the field of advanced detection, can solve the problems of low detection accuracy of the direct current method, and achieve the effects of high accuracy, flexible and convenient use, and a wide range of applications
Active Publication Date: 2012-07-11
DATONG COAL MINE GRP
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[0003] In order to solve the problem that the detection accuracy of the direct current method in the mine is not high, the present invention provides a direct current detection method for the mine goaf water accumulation area
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[0015] The direct current detection method of the mine goaf water accumulation area comprises the following steps,
[0016] (1) Arrange power supply electrodes and measuring instruments. Specifically, find a point on the bottom plate within 100 meters from the working face in the excavation roadway as the center point P, fix the measuring instrument at the center point P, and follow the direction of excavation with the center point P as the center. A power supply electrode is arranged at a position of 5 meters against the direction of excavation, which are respectively power supply electrode 1 M and power supply electrode 2 N. With the center point P as the center, a power supply electrode is arranged at a position of 10 meters along the direction of excavation and against the direction of excavation, respectively. Three A and power supply electrode four B;
[0017] (2) Use the measuring instrument at the center point P to measure and record the supply current of each power su...
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The invention relates to a DC detection method in a mined-out water accumulated area of a mine, solving the problem that a DC method is low in detection precision under a mine shaft. The DC detection method in the mined-out water accumulated area of the mine comprises the following steps of: arranging power supply electrodes and a measurement instrument; measuring and recording power supply current of each power supply electrode, a potential difference between each power supply electrode and the measurement instrument, and coordinates of the power supply electrodes; changing positions of the power supply electrodes, and measuring for multiple times; summarizing data and comparing the data; and calculating and judging change and distribution simulations of resistivity values by combining the summarized signals according to an established typical electrical geological model corresponding to a mining area to draw a conclusion, and conjecturing a position with a mined-out area or a mined-out water accumulated area. The DC detection method disclosed by the invention has the advantages of wide application range, flexibility and convenience for use and high accuracy.
Description
technical field [0001] The invention relates to an advanced detection method under a mine, in particular to a direct current detection method for a mine goaf water accumulation area. Background technique [0002] During the mining process of large coal mines, due to the impact of the overlying goaf and the surrounding small kilns, especially the random digging of the small kilns in the mine field, mining across layers and boundaries, chaotic management, and no relevant production technical data, accompanied by mining Plumbed water and harmful gases exist, all of which bring hidden dangers to mine safety production. In order to find out the water accumulation in the goaf or in front of the working face in time, so as to detect and discharge water and remove harmful gases in time, eliminate potential safety hazards, and ensure safe production in coal mines, an advanced underground detection method is needed. Mine direct current method technology has been widely used in the de...
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IPC IPC(8): G01V3/22
CPCY02A90/30
Inventor 郭金刚杨智文薛国树刘文彦许开柱张巍
Owner DATONG COAL MINE GRP