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本文介绍了朝鲜民主主义人民共和国安州煤矿页岩的矿物成分和膨胀性质试验结果。测试结果表明,该页岩具有密度大、孔隙比小和亲水性粘土矿物含量高的特点。这种矿物组成和物理性质决定了它将表现出膨胀变形和膨胀力大的工程特性。因此,认为减少扰动和保持原始含水量可能是防止围岩破坏性膨胀的有效途径。本文是我所和朝鲜同行之间的第一次实质性合作研究成果。
This paper presents the results of the mineral composition and swelling properties of shale from the Anju coal mine in the Democratic People’s Republic of Korea. The test results show that the shale is characterized by high density, low void ratio, and high content of hydrophilic clay minerals. This mineral composition and physical properties determine that it will exhibit engineering characteristics of large expansion and expansion forces. Therefore, it is believed that reducing the disturbance and maintaining the original water content may be an effective way to prevent the destructive expansion of the surrounding rock. This article is the result of the first substantive cooperation research between our institute and our North Korean counterparts.