2023.2.1 The actual detection of coal seam thickness of about 3 m using 200 MHz in a mine in Shanxi province shows that the electromagnetic wave propagation speed in the coal seam in this area is 0.1342 m/ns.
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1984.8.1 The recently developed in-seam seismic method is applied underground on the coal face itself. The area ahead of that currently being mined is investigated and it
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The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate
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2000.4.1 PDF This paper reports on a novel application of ground penetrating radar to a longwall steering problem in the coal mining
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2017.6.12 Geophysical exploration can be effective in detecting and monitoring potential sources of coal mine water in-rushes and underground watercourses.
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2022.5.16 The state-of-the-art technology of the continuous miner (CM) deployment is a unique method to extract coal seam lying at greater depth with higher seam
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2007.9.1 To ensure the safety of coal mines, it is necessary to obtain accurate geologic information on factors, such as small faults, coal seam development,
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2023.11.7 According to the results of graphic constructions, the boundary of the impact zone of mining operations when mining the coal seam with longwall face No.
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Mining methods. Modern underground coal-mining methods can be classified into four distinct categories: room-and-pillar, longwall, shortwall, and thick-seam. Room-and-pillar mining. In this method, a number of
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