澳大利亚薄煤层选采技术探讨

Selective mining technology of thin coal seam in Australia

能否低成本高效回收薄煤层,一直是露天煤矿界的关注点。根据煤种不同,我国《煤、泥炭地质勘察规范》建议的计量厚度褐煤为≥1.5m,其他煤种为≥1.0m。我国在采用露天开采工艺的煤矿中,大部分最小选采厚度都遵循这一值。而澳洲薄煤层赋存较多,尤其在猎人谷,大部煤田都以薄煤层赋存为主,这里开采的最小选采厚度一般0.3m。以猎人谷内某露天矿为例从多维度探讨澳洲薄煤层最小选采厚度的合理性,以期对我国薄煤层选采起到抛砖引玉的作用。

Whether the thin coal seam can be recovered with low cost and high efficiency has always been the focus of open-pit coal mining industry. In China, most of the minimum selective mining thickness for open-pit mining follows the measurement thickness recommended in the Specifications for Coal and Peat Exploration, which is no less than 1.5 m for lignite, and no less than 1.0 m for other coal types.While in Australia, there are many thin coal seams, especially in Hunter Valley, where thin coal seams dominate in most of the coal fields, and the minimum selective mining thickness there is generally 0.3 m.Taking an open-pit mine in Hunter Valley as an example, the rationality of minimum selective mining thickness of thin coal seam in Australia is discussed from multiple perspectives, so as to offer reference for thin coal seam mining in China.