煤层内泥带对煤矿露天采矿者工作表现的影响

Om Prakash Singh, P. Dhekne, Manoj Pradhan
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引用次数: 0

摘要

1999 年,马哈纳迪煤田有限公司(Mahanadi Coalfields Limited)的 Lakhanpur 露天开采项目首次采用露天采煤机采煤,由于该采煤机的成功及其带来的好处,如无需钻孔和爆破、光滑稳定的高煤壁、为控制质量而进行的选择性开采以及均匀的产出碎块尺寸(-100 毫米)等,许多露天煤矿都采用了该采煤机,现在它已成为印度煤炭开采的一种颠覆性大规模生产技术。就全国煤炭资源而言,奥迪沙邦以 88.104 BT 的资源量位居第一,但奥迪沙邦煤层的特点是灰分含量高,交错的污垢带(10 厘米至 1.5 米)通常被称为废品。为了保持煤炭质量,这些主要由砂岩和页岩组成的泥土带也会被露天采矿者切割,并在装载时被分离出来,运往废渣堆放场或覆盖层堆放场。这些土层对露天采矿机的性能有很大影响,在选择时必须加以考虑。作者根据在奥迪沙不同露天煤矿进行的深入实地研究,强调了煤层中的煤泥带对露天采矿机性能指标的影响,本文中的性能指标是切割 1000te 材料时的归一化生产率、柴油和镐头消耗量。研究发现,镐头消耗量与切割的研磨材料数量呈线性变化。此外,还建立了经验关系,用于估算在间歇性泥土带煤层作业的露天采煤机的月归一化生产率、柴油消耗量和镐头消耗量,其决定系数(R2)分别为 0.74、0.84 和 0.73。根据现场数据对所建立的关系进行了验证,发现误差率在 +20% 以内。这项研究有助于煤矿公司选择合适的露天采煤机,以实现目标产量,同时也有助于规划采煤机运行期间的镐头和柴油库存。
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Impact of In-Seam Dirt Bands on the Performance of Surface Miners in Coal Mines
Surface miner was introduced for coal extraction at Lakhanpur open cast project of Mahanadi Coalfields Limited in 1999 for the first time and owing to its success and benefits it offered like elimination of drilling and blasting, smooth and stable high wall, selective mining for quality control and uniform output fragment size (-100mm) etc. it was adopted in many open cast coal mines and now has become a disruptive mass production technology for coal mining in India. In terms of coal resources in the country, Odisha stands first with 88.104 BT resources but the coal seams in Odisha are characterized by its high ash content and interlaced dirt bands (10 cm to 1.5 m) often termed as rejects. For maintaining coal quality, these dirt bands predominantly of sandstone and shale are also cut by surface miners and are segregated at the time of loading and transported to reject dumps or overburden dumps. These dirt bands have a significant impact on the performance of surface miners and must be taken into account during their selection. The authors, based on the intensive field study undertaken at different opencast coal mines in Odisha highlighted the impact of in-seam dirt bands in coal seams on the performance indicators of surface miners which are normalized production rate, diesel and pick consumption for cutting 1000te of material in this paper. Pick consumption was found to vary linearly with the quantum of abrasive material cut. Empirical relations for estimating monthly normalized production, diesel consumption, and pick consumption of surface miners operating in coal seams with intermittent dirt bands with a coefficient of determination (R2) of 0.74, 0.84, and 0.73 respectively were also developed. The developed relations were validated with the field data and the % error was found to be within +20%. This study helps the coal mining companies in the selection of suitable surface miners for achieving targeted production and also for planning inventory of picks and diesel during its operation.
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来源期刊
Journal of Mines, Metals and Fuels
Journal of Mines, Metals and Fuels Energy-Fuel Technology
CiteScore
0.20
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发文量
101
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