An Experimental Study on Measurement Method for Grain Bulk Modulus of Sandstone

Min-Jun Kim; Eui-Seob Park; Chan Park; Junhyung Choi

doi:10.7474/TUS.2023.33.2.071

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2023 Vol.33, Issue 2 Next Page

Original Article

An Experimental Study on Measurement Method for Grain Bulk Modulus of Sandstone 사암의 입자 체적계수 측정 방법에 대한 실험적 연구

30 April 2023. pp. 71-82

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Abstract

This study presents a direct measurement method for grain bulk modulus, which is important hydraulic-mechanical properties of rock, and conducts the experiment to investigate the grain bulk modulus of sandstone. In addition, the factors affecting the grain bulk modulus were investigated, comparing volumetric characteristics of rocks with different properties. As a result of the experiment, it was confirmed that the theoretically estimated bulk modulus is overestimated than the direct measured one. The possibility of the difference was analyzed, discussing the existence of non-connected pore space due to particle structure of the rock. Finally, the experimental results showed that the direct measurement suggested in this study can reliably predict the grain bulk modulus of sandstone.

Keywords

Grain bulk modulus

Poroelasticity

Sandstone

Hydraulic-Mechanical property

본 연구에서는 암반 수리-역학적 관계의 기본모델 입력인자인 암석 입자 체적계수에 대하여 직접적인 측정 실험법을 제시하고, 실험을 수행함으로써 암석 입자 체적계수를 도출하였다. 또한, 서로 다른 기하학적 특성을 가진 암석에 대하여 암석 입자 체적계수를 비교함으로써 입자 체적계수에 영향을 미치는 요인에 대해 살펴보았다. 실험 결과 이론적으로 추정하는 암석 입자 체적계수의 값이 실제보다 과대예측 하고 있음을 확인하였으며, 이에 대해 암체 입자 구조에 따른 암석 내부 고립돼있는 공극의 존재로 인한 가능성을 고찰하였다. 최종적으로, 본 연구에서 제시한 직접적인 측정방법이 사암의 입자 체적계수를 신뢰성 있게 예측할 수 있음을 확인하였다.

키워드

입자 체적계수

공극탄성이론

사암

수리-역학 기본물성

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Information

Publisher :Korean Society for Rock Mechanics and Rock Engineering
Publisher(Ko) :한국암반공학회
Journal Title :Tunnel and Underground Space
Journal Title(Ko) :터널과 지하공간
Volume : 33
No :2
Pages :71-82
Received Date : 2023-02-19
Revised Date : 2023-03-13
Accepted Date : 2023-03-13
DOI :https://doi.org/10.7474/TUS.2023.33.2.071

Tunnel and Underground Space ISSN:1225-1275(Print) 2287-1748(Online) 터널과 지하공간

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