Scale-Model Experiments on Stress Changes with Longwall Coal Mining.
نویسندگان
چکیده
منابع مشابه
Automation in Longwall Coal Mining - A Review
Coal is an important fossil fuel and will also be for the next decades [1]. The only way to achieve the challenges faced by the coal industry is to reduce production costs by improving productivity. Improvement of productivity has become an important goal for today’s coal industry in the race to increase price competitiveness. In recent years, underground mining method is becoming popular becau...
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In mining of inclined coal seams in Tangshan coal mine of Kailuan group, gateways on either end of a panel were both typically located along the floor and a gateway pillar between adjoining panels was left unmined between adjacent panels to ensure stability, thus forming a planar mining system. According to the practice, however, it turned out that this conventional mining system has long-stand...
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Geological discontinues in the coalbed, such as faults, sandstone channels, permeability facies, lithotype changes, and large scale partings in the coal seam, can cause intermittent production problems or produce unexpected amounts of water or gas from degasification boreholes. These discontinuities not only can impact methane emissions into the mine workings, especially if they hinder proper a...
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As more easily mined deposits are depleted, the reserves are becoming more limited and less favorable. Deposits of coal or trona that are being longwall mined are deep and are getting deeper. Coal bursts and bumps frequently occur within development entries in longwall mining of deep mines due to high stresses. This paper presents a novel patented longwall mining layout “Longwall Mining with Sp...
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Approximately more than 90% of all coal production in Iranian underground mines is derived directly longwallmining method. Out – of – seam dilution (namely 20–30%) is one of the essential problems in these mines.Therefore the dilution can impose the additional cost of mining and milling. As a result, recognition of the effectiveparameters on the dilution has a remarkable role in ind...
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ژورنال
عنوان ژورنال: Shigen-to-Sozai
سال: 1996
ISSN: 0916-1740,1880-6244
DOI: 10.2473/shigentosozai.112.439