Exploration of weakening mechanism of uniaxial compressive strength of deep sandstone under microwave irradiation

Yang, Bohan; Gao, Mingzhong; Xie, Jing; Liu, Junjun; Wang, Fei; Wang, Mingyao; Wang, Xuan; Wen, Xiangyue; Yang, Zhaoying

doi:10.1007/s11771-022-4910-3

Cited by 28 publications

(7 citation statements)

References 39 publications

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“…Lu et al [ 29 ] independently developed an open microwave fracturing experimental device, used to conduct microwave-induced borehole fracturing experiments. Gao et al [ 30 ] and Yang et al [ 31 ] found that the rock strength and P-wave velocity were reduced at different degrees under microwave radiation. The results show that there is a certain degree of reduction in wave velocity and crack development in the rock mass around the borehole.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Damage Characteristics and Acoustic Properties of Red Sandstone with Different Water Contents under Microwave Radiation

et al. 2023

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Rock breaking is one of the most basic issues in deep underground engineering. Water plays an important role in the rock response under microwave radiation. Consequently, microwave radiation experiments using red sandstone with different water contents were conducted. The damage characteristics and ultrasonic properties of red sandstone after microwave radiation were primarily investigated, and the representative conclusions were drawn as follows: With the increase in water content, the time of complete formation of the rupture surface of the rock sample gradually decreased, and the decreasing range gradually increased. When the fracture surface is completely formed, the samples with a higher water content have more powdery rock cuttings and less surface roughness. The damage degree of the samples does not increase significantly with the increase in the water content when the sample is radiated at the same time. As the microwave radiation time is increased, the damage degree of the sample will increase significantly. Through the ultrasonic velocity test, it can be suggested that the sample exhibits obvious zonal damage characteristics under the action of a microwave. Generally speaking, it is a very effective means of improving the degree of microwave attenuation of the rock by increasing the water content of the rock mass.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Damage Characteristics and Acoustic Properties of Red Sandstone with Different Water Contents under Microwave Radiation

et al. 2023

Self Cite

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“…With social progress and economic development, the shallow resources of the earth are gradually reduced, and the deep strata are rich in coal, geothermal and other mineral resources. Deep mining has become a necessary way to support sustainable development of economic society [1][2][3][4][5].Hot dry rock (HDR) is a clean and renewable deep geothermal resource, which is regarded as one of the new energy resources that can be vigorously developed by many countries [6,7].As the main carrier of HDRgeothermal energy, hightemperature granite is bound to cool downduring the construction of artificial thermal reservoir and the exploitation of HDR geothermal energy, and its physical-mechanical properties will change significantly [8,9].Therefore, studying the physical-mechanical properties of granite after high temperature is helpful to guide the successful exploitation of HDR geothermal energy. At present, many scholars study the physical-mechanical properties of rock after high temperaturetreatment.…”

Section: Introductionmentioning

confidence: 99%

Research on physical-mechanical properties and energy evolution characteristics of granite after high temperature treatment

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et al. 2023

THERM SCI

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Granite is the main carrier of geothermal energy of hot dry rock. Therefore, the study of influence of different temperatures on the physical-mechanical properties and energy evolution characteristics of granite after high temperature treatment is an important way to guide the successful exploitation of hot dry rock geothermal resources. Physical tests and uniaxial compression tests were carried out on granite after high temperature treatment ranging from 25 to 350?C. The results show that change rates in volume, mass, density, P-wave velocity and porosity of granite increase with increasing temperature. The research results can provide basic data support for the safe and efficient development of hot dry rock in China, and also develop the theory of high temperature rock mechanics.

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“…It has been applied in the fields of natural gas and oil exploitation [1], geothermal exploitation [2][3][4], coal mining [5,6] and extraction of coalbed methane [7,8], land subsidence [9], induced earthquakes [10,11], disposal of nuclear waste and pollutants [12,13], etc. Nowadays, the profound evolution of the international situation and the turbulent global energy supply and demand pattern have forced mining to go deeper [14][15][16][17][18][19], the research on the seepage law of cracks in rocks and coal seams has become more and more important. According to a large number of statistics, the basic units of underground medium fractures are divided into single fractures and cross fractures.…”

Section: Introductionmentioning

confidence: 99%

Study on seepage characteristics of cross fractures in adjacent and convective flow modes

et al. 2023

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The distribution of fractures in the underground rock mass is complex, so it is of great significance to study the parameter characteristics of fracture seepage for geothermal exploitation, land subsidence, and other fields. Based on the Weierstrass-Mandelbrot function, several X-shaped fracture models with different roughness are established, and the fracture seepage law under different roughness and inlet pressure is studied. At the same time, the center (cross-region) of the X-shaped fracture is selected as the research object, and the seepage difference characteristics of the cross-region under the two inlet modes of adjacent flow and convective flow are compared and analyzed. The results show that the outlet velocity of fracture fluid is inversely proportional to the fractal dimension and is directly proportional to the inlet pressure.

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Exploration of weakening mechanism of uniaxial compressive strength of deep sandstone under microwave irradiation

Cited by 28 publications

References 39 publications

Experimental Study on the Damage Characteristics and Acoustic Properties of Red Sandstone with Different Water Contents under Microwave Radiation

Experimental Study on the Damage Characteristics and Acoustic Properties of Red Sandstone with Different Water Contents under Microwave Radiation

Research on physical-mechanical properties and energy evolution characteristics of granite after high temperature treatment

Study on seepage characteristics of cross fractures in adjacent and convective flow modes

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