Estimation of mechanical properties of weak rocks by rod penetration test

通过杆贯入试验评价软弱岩石的力学特性

• 批准号: 62550465
• 负责人: MATSUI Kikuo
• 金额: $ 1.28万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62550465/
• 关键词: Rod penetration test; Weak rock; 非整形供試体

A knowledge of the mechanical properties of weak rocks such as shale, sandy shale and coal is essential for ground control in underground coal miningMost tests which are usually used to determine the strength of rock require the specimen to be in the precisely prescribed shape. However, with weak rocks it is often difficult, or practically impossible in some cases, to prepare the specimen as required by these tests.From this point of view rod penetration test has been carried out, because in this method an unprepared specimen can be used.The results of this study are summarized as follows:1. The size of specimen should be at least 10 times the rod diameter.2.It is necessary to avoid the size effect of rod on penetration strength Srp.3.Penetration modulus Erp is not dependent on the rod size.4.Uniaxial strength Sc and tangent young's modulus at 50% of compressive strength E_<50> can be estimated with penetration strength Srp and penetration modulus E_<50> as follows: Sc = 0.11 Srp, E_<50>= 2.3 Erp5.It is possible to estimate the strength reduction with water quantitatively by this test.

了解页岩、砂页岩和煤炭等软弱岩石的力学特性对于地下煤矿开采的地面控制至关重要。大多数通常用于确定岩石强度的测试都要求样本具有精确规定的形状。然而，对于软弱的岩石，通常很难或在某些情况下实际上不可能按照这些测试的要求准备样本。从这个角度来看，已经进行了杆穿透测试，因为在这种方法中可以使用未准备的样本本研究的结果总结如下： 1．试样尺寸应至少为杆直径的10倍。2.必须避免杆尺寸对侵彻强度Srp的影响。3.侵彻模量Erp不依赖于杆尺寸。4.单轴强度Sc和50% 抗压强度 E_<50> 时的切向杨氏模量可以用穿透强度 Srp 和穿透模量 E_<50> 估算如下： Sc = 0.11 Srp， E_<50>=2.3Erp5。通过该试验可以定量地估计水引起的强度降低。

项目成果

松井紀久男: 第21回岩盤力学シンポジウム講演論文集. 121-125 (1989)

Kikuo Matsui：第 21 届岩石力学研讨会论文集 121-125（1989）。

島田英樹: 資源・素材学会春季大会研究・業績発表講演要旨集. (1989)

Hideki Shimada：日本资源材料学会春季会议上的研究和成果展示摘要（1989 年）。

松井紀久男: 第20回岩盤力学シンポジウム講演論文集. 269-273 (1988)

Kikuo Matsui：第 20 届岩石力学研讨会论文集 269-273（1988）。

Shimada, Hideki: "Mechanical properties of weak rocks by rod penetration method" Proceedings of the '89 Annual Meeting of the Mining and Materials Processing Institute of Japan. (1989)

Shimada, Hideki：“通过杆穿透法测定软弱岩石的机械性能”日本采矿和材料加工研究所 89 年年会论文集。

松井紀久男: 第21回岩盤力学シンポジウム講演論文集. 121-125 (1989)

Kikuo Matsui：第 21 届岩石力学研讨会论文集 121-125（1989）。