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題名 | High-Temperature Tensile Strength of Rocks by Hydraulic Fracturing Tests=以水力破裂法探討高溫下岩石之張力強度 |
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作者姓名(中文) | 李德河; 曾慶恆; 施勵行; | 書刊名 | 中國地質學會會刊 |
卷期 | 39:4 1996.10[民85.10] |
頁次 | 頁507-522 |
分類號 | 441.103 |
關鍵詞 | 巴西試驗; 邊界孔隙率; 高溫; 水力破裂法; 滲透係數; 岩石; 張力強度; 三軸試驗; Brazilian tests; Boundary porosity; High temperature; Hydraulic fracturing; Permeability; Rocks; Tensile strength; Triaxial test; |
語文 | 英文(English) |
中文摘要 | 本文主要是以大理石為材料,對其進行不同溫度下之室內水力破裂試驗,以探討 溫度對岩石於水力破裂試驗中的影響。另外再以巴西試驗和撓曲試驗求出岩石之張力強度, 和以事先經過熱處理和未經熟處理之岩石試體進行高溫下及室溫下之巴西試驗,用以比較不 同試驗下所求得岩石張力強度之異同,以及岩石經過熱處理後所求得岩石張力強度之差異。 由試驗結果知在高溫下的巴西試驗與高溫下的水力破裂試驗所得張力強度皆隨溫度的增加而 減小, 在 300 ℃時由水力破裂試驗所得的張力強度減小至為室溫下( 30 ℃)的 0.25 倍 ;同樣在 300 ℃時由巴西試驗所得的張力強度減小至為室溫下( 30 ℃)的 0.6 倍。 |
英文摘要 | Knowledge of the physical properties of rocks at high temperature is important for the design, construction and maintenance of nuclear waste disposal facilities in rock mass. This paper presents the results of a series of laboratory hydraulic fracturing (LHF) tests of rocks at various temperatures ranging from 30 ℃ to 300 ℃. The experimental details, including the techniques used to apply high temperature in a stainless triaxial cell, are described. The mechanism of the fracture initiation and reopening is presented. The tensile strength of the rock was calculated based on the results of the LHF tests, and a comparison with that determined by the splitting tensile strength test (known as the Brazilian test) was made. The tensile strength of the rock decreased as the temperature of the rock went up and at the temperature of 300 ℃, the strength reduced to only about 25% of the room-temperature (30 ℃ ) strength. The increase in the permeability of the rock, as the temperature rose, is evidenced by the increase in the boundary porosity, although no direct measurement of the permeability was made. Issues concerning the LHF tests that merit further investigation are pointed out. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。