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Underground Mine Voids in Ohio WaterResources Investigations Report 024041 ... abandoned coal mines can be an important source of potable water (Crouch and others, 1980). In other areas, water qual ... Detection of abandoned mine voids by use of resistivity 5 72 m (horizontal distance). These anomalous areas are
will be the most important problem for abandoned coal mines in China in the next few decades. The old goaf water accumulation disasters are the most serious disasters in the coal mines in recent years. From 2011 to 2017, there were 75 serious water accidents in coal mines, including 61 old goaf water accumulation accidents, accounting for %.
article{osti_, title = {Detection of coal mine workings using highresolution earth resistivity techniques. Final technical report, September 1979September 1980}, author = {Peters, and Campbell, and Sturdivant, }, abstractNote = {Shallow underground voids resulting from early coal mining and other resource recovery activities over the past several decades are now being ...
Sep 01, 2017· A hidden waterbearing collapse column (WBCC), directly exposed during coal mining, is a potential source of serious mine flooding. Presently, the transient electromagnetic method (TEM) is widely used, which shows good performance in detecting WBCCs in coal mines.
abandoned underground coal mine, eastern Illinois. This investigational program, in cooperation with the US Department of Labor Mine Safety and Health Administration (MSHA), was designed to advance current stateofpractices of geophysical technologies for detecting underground mine voids.
May 19, 2020· The safety, efficiency, and green production of coal mines require more advanced geophysical detection technologies. In particular, the accurate detections of the locations of water .
Katja Essen, Thomas Bohlen, Wolfgang Friederich, Thomas Meier, Modelling of Rayleigh‐type seam waves in disturbed coal seams and around a coal mine roadway, Geophysical Journal International, /, 170, 2, (511526), (2007).
a list of geophysical methods that may be applicable. The application summary table at the end of the chapter aims to integrate all of this information into a single, onepage reference guide. cavity/old workings detection This is arguably the most challenging problem encountered when coal mining occurs over, or in
The abandoned coal mine hidden disasters have been important factors that influencing safety production and social lives. Based on the analysis of the types of hidden disasters in abandoned coal mines and their impacts on the environment, the exploration techniques and methods of goafs and water hazards, spontaneous combustion or fire area distribution in abandoned mines are discussed ...
Katja Essen, Thomas Bohlen, Wolfgang Friederich, Thomas Meier, Modelling of Rayleigh‐type seam waves in disturbed coal seams and around a coal mine roadway, Geophysical Journal International, /, 170, 2, (511526), (2007).
Mar 19, 2016· Abstract. Mine water and mine inflow water are closely linked to the risk of mine water disasters. The relationships between various geophysical parameters and the volume of water in mine tunnels were considered by using an integrated suite of appropriate geophysical methods [ direct current (DC) resistivity, transient electromagnetic method (TEM), and the seismic scattered wave .
the electrical resistance. Mine voids in coal mines are usually encountered as resistivity lows because of the presence of acidic mine water. Other Methods, such as magnetics and ground penetrating radar have been used for detecting subsurface cavities, but can be subject to precision, interference, or depth
For integrated resource coal mines, especially those that arethreatened by water inrush hazards, it is recommended to adapt the principles of ''forecasting in advance, detection before tunneling or mining''. Undermine detection includes undermine drilling detection, geophysical detection, and geochemical detection.
In deep mine applications, GPR is invaluable for identifying geologic features that may be potential areas for rock bursts, such as fractures, shear zones and faults. This data illustrates a GPR scan of the roof in a salt mine and shows the variable thickness of salt in the roof structure. This data was collected with a SIR 30E and a 400 MHz ...
Although many geophysical techniques have been used to detect the disaster geological anomalous body in the Huaibei coal mine company, there are still many mining disasters happening. The main reason is that the coal seam is rich of water in Huaibei coal areas. If the ground water connects with tunnels, it will cause the flood to collapse the coal seam.
Fortunately, coal mines are rarely dry and it is not necessary for the mine to contain much water for the mine openings to be detectable. Mine water with conductivity in the range of typical surface water could be about 500 S/cm, which corresponds to a resistivity of 20 ohmmeters.
Abstract: Waterbearing goaves are one of the main causes for water inrush accidents in Chinese coal mines. At present, both the surface and subsurface geophysical technologies cannot fully meet the technical requirements of high precision detection for coal mines safety development and production.
Many abandoned waterfilled mine tunnels at unknown locations in major coal fields in China pose a hazard to the safe production in modern mines. Geophysical methods with rapid and accurate determi...
Detection of Underground Voids in Ohio by Use of Geophysical Methods By Jens Munk and Rodney A. Sheets GEOLOGICAL SURVEY WaterResources Investigations Report 974221 Prepared in cooperation with the OHIO DEPARTMENT OF TRANSPORTATION and the DEPARTMENT OF TRANSPORTATION Columbus, Ohio 1997
Detection of Abandoned Underground Coal Mines by Geophysical Methods Water pollution control research series: Authors: HRBSinger, Inc. Environmental Sciences Branch, Wilson Fisher: Contributors: United States. Environmental Protection Agency, Pennsylvania. Dept. of Environmental Resources: Publisher: Environmental Protection Agency, 1972 ...
Controlling water in underground coal mines is an important safety consideration. There are very few methods that can detect or map water remotely within the working face of a mine. The twodimensional (2D) electrical resistivity tomography (ERT) method is sufficient for detecting water directly above the roof and below the floor, but it fails ...
In addition, the water detection technology for the roof of fully mechanized sublevel caving face was researched and applied in several coal mines, which has been verified by boreholes and mining ...
DETECTION OF ABANDONED UNDERGROUND COAL MINES BY GEOPHYSICAL METHODS by HRBSinger, Incorporated Environmental Sciences Branch Science Park State College, Pennsylvania 16801 for the ENVIRONMENTAL PROTECTION AGENCY and the PENNSYLVANIA DEPARTMENT OF ENVIRONMENTAL RESOURCES Project 14010 EHN April 1971 For salo by the Superintendent of .
23rd International Conference on Ground Control in Mining, Morgantown, WV, August 3–5, 2004 Author: F. S. Kendorski (AAI) One of the most dangerous events in underground coal mining is unexpectedly encountering water inrushes from undetected abandoned mines in the same seam. The surest and most confident method is probe drilling either from the mine or [.]
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