Results 21 to 30 of about 346,667 (337)
Shock and Vibration, 2022 Combined with specific engineering examples, the spatial disturbance influence characteristics and laws of the surrounding rock stress in the staggered roadways are analyzed by numerical simulation.
Qingwei Bu +3 more
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Electrodialysis of coal mine water
Water Resources and Industry, 2021 The treatment of model solution resembling the coal mine water from the “Bolesław Śmiały” coal mine in Łaziska Górne, Poland, was investigated. Two cases were investigated: 1) electrodialysis is directly applied in concentration of coal mine water; 2) coal mine water is pre-concentrated in the NF-RO system and then fed to the electrodialysis.
Mitko, Krzysztof +3 more
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Shock and Vibration, 2021 The gob-side entry retaining plays an important role in improving working face ventilation, alleviating working face connection, and increasing mining revenue.
Peng Li +4 more
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Geofluids, 2022 In order to avoid the problem of repeated repair of roadways in the upper mining area of upward mining in the integrated mine, taking the roadways in the 302 mining area of Shancheng Coal Mine as the research object, the failure characteristics of ...
Fengfeng Wu +5 more
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Canaries in the coal mine [PDF]
European Respiratory Journal, 2013 Up until 30 years ago, coalminers relied on canaries as warning systems against harmful gases and pollutants underground. The miners listened for birdsong and if the birds fell silent, then they knew there was danger to their health and to take action. Today we have much more sophisticated information and reporting on the quality of air.
openaire +2 more sources
Meitan kexue jishuThe reserves and production of thick coal seams account for half of the total reserves and production of raw coal in China. By combing the history of thick coal seam mining, we summarize the technology and equipment development practice of thick coal ...
Huijun HAN +5 more
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Geofluids, 2022 The gob-side roadway technology is widely used in coal mining in China, as it can improves the recovery rate of coal resources and alleviate the shortage of mining replacement.
Houqiang Yang +8 more
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BIOMONITORING OF ECOLOGICAL STATE OF THE ENVIRONMENT IN THE ZONE OF INFLUENCE OF THE “CHERVONOGRADSKA” MINE OF THE LVIV-VOLYN COALFIELD [PDF]
, 2018 Coal mining has a very negative impact on the environment and it requires monitoring studies to assess the degree of environmental ...
Karabyn, Vasyl, Ravlyk, Ulyana
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Application of Homogenized Load-Bearing Ring Hypothesis in Roadway Supporting
Shock and Vibration, 2022 Artificial support system takes advantages of self-bearing capacity of surrounding rock mass in roadway support, which is one of the important supporting ideas in modern times.
Quntao Zhang +9 more
doaj +1 more source