王斌, 来兴平. 2014: 鄂尔多斯盆地西北缘上海庙矿区某井区软岩水理特性研究. 工程地质学报, 22(s1): 43-47. DOI: 10.13544/j.cnki.jeg.2014.s1.008
    引用本文: 王斌, 来兴平. 2014: 鄂尔多斯盆地西北缘上海庙矿区某井区软岩水理特性研究. 工程地质学报, 22(s1): 43-47. DOI: 10.13544/j.cnki.jeg.2014.s1.008
    Wang Bin, Lai Xingping. 2014: STUDY ON HYDRAULIC PROPERTIES OF SOFT ROCKS IN THE SHANGHAIMIAO COAL MINING REGION IN THE NORTHWESTERN EDGE OF ERDOS BASIN IN CHINA. JOURNAL OF ENGINEERING GEOLOGY, 22(s1): 43-47. DOI: 10.13544/j.cnki.jeg.2014.s1.008
    Citation: Wang Bin, Lai Xingping. 2014: STUDY ON HYDRAULIC PROPERTIES OF SOFT ROCKS IN THE SHANGHAIMIAO COAL MINING REGION IN THE NORTHWESTERN EDGE OF ERDOS BASIN IN CHINA. JOURNAL OF ENGINEERING GEOLOGY, 22(s1): 43-47. DOI: 10.13544/j.cnki.jeg.2014.s1.008

    鄂尔多斯盆地西北缘上海庙矿区某井区软岩水理特性研究

    STUDY ON HYDRAULIC PROPERTIES OF SOFT ROCKS IN THE SHANGHAIMIAO COAL MINING REGION IN THE NORTHWESTERN EDGE OF ERDOS BASIN IN CHINA

    • 摘要: 上海庙煤田位于内蒙古自治区西南部,鄂尔多斯盆地西北缘,是我国蒙陕宁交界能源金山角的重要煤炭产地。该区域煤炭资源具有埋深大、开采条件复杂的特点。利用煤田地质勘察深钻孔所获得的岩样开展了岩石的渗透系数、膨胀系数、崩解系数、软化系数等4个方面的岩样水理性质的室内实验研究。实验结果显示粗砂岩、细砂岩、粉砂岩、粉砂质泥岩渗透率和软化系数整体上呈减小趋势。粗砂岩的耐崩解系数明显较低,细砂岩耐崩解系数较其他岩性岩样偏高,3组粉砂质泥岩的耐崩解系数呈现较大的差异。中粗砂岩、细砂岩、粉砂岩岩粉自由膨胀率呈逐渐减小趋势,3组粉砂质泥岩岩粉自由膨胀率差异较大。岩样中所含矿物主要为石英、钾长石、斜长石、黏土矿物,其中黏土矿物含量不是很稳定,通过实验结果对比来看,岩石成分和其水理性质似乎关系不大,这一结果还需要进一步深入研究。这些结果对今后煤炭资源开采都具有重要意义。

       

      Abstract: The Shanghaimiao mine is located in the southwest part of the Inner Mongolian Autonomous Region, and in the northwestern edge of the Erdos basin, which is one of the most important energy coal mine bases in China. The coal mine in this area is characterized by the large burial depth and complicated exploitation conditions. The laboratory tests were carried out to investigate the permeability, swelling, collapse and softening coefficients by utilizing the core samples attained during the geotechnical investigation drilling. The test results show that the permeability and softening properties of coarse sandstone, fine sandstone, siltstone, silty mudstone tend to decrease. The collapse coefficient of coarse sandstone is clearly lower, and that of fine sandstone is slighter higher than others',but those of three sets of silty mudstone are rather scattered. The free swelling coefficients of medium coarse sandstone, fine sandstone and siltstone tend to decline respectively, but those of three sets of silty mudstone are rather scattered too. The mineral ingredients of rock samples include quartz, potash feldspar, plagioclase and clay minerals, but the content of clay minerals are not stable. By comparing the test results, the hydraulic properties seem to not be irrelevant to the mineral contents, which still needs further research. These research findings are of great significance to the latter coal exploitation.

       

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