Results 141 to 150 of about 21,023 (296)
Deep Underground Science and Engineering, EarlyView.A novel shear‐lag model, validated by pull‐out tests, incorporates a constant bond stress stage to predict the complete load–displacement response of grouted rock bolts, providing a new tool for optimizing anchorage length and material toughness in deep underground engineering. Abstract The stability of rock masses in deep underground excavations, such
Wenhui Bian +6 more
wiley +1 more source
Numerical Simulations of Fracture Propagation Applied to Petroleum and Geothermal Reservoir Using Finite Element Method [PDF]
, 2015 Hydraulic fracturing is a major technique in reservoir stimulation to enhance production. Better understanding of mechanisms of hydraulic fracturing is essential for designing hydraulic fracture treatments.
Huang, Kai
core
Deep Underground Science and Engineering, EarlyView.B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza +4 more
wiley +1 more source
Deep Underground Science and Engineering, EarlyView.Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu +4 more
wiley +1 more source
Deep Underground Science and Engineering, EarlyView.This study examines the effects of curing temperature on the mechanical behavior of underground rock masses treated with enzyme‐induced calcite precipitation (EICP) and an innovative biopolymer‐modified EICP (BP‐EICP). Abstract Biocementation is an innovative and sustainable technique for reinforcing weak and weathered rock masses in natural and ...
Mary C. Ngoma, Oladoyin Kolawole
wiley +1 more source
Laboratory Experimentation on Simultaneous Propagation of Multiple Hydraulic Fractures [PDF]
, 2019 Stress shadowing, a well-known effect that occurs in multi stage hydraulic fracture operations when the hydraulic fractures are placed close to each other, is an important challenge to obtain the highest estimated ultimate recovery (EUR) from a ...
Gunaydin, Delal
core
Development Trend and Key Technologies of Hydraulic End of High-Power Fracturing Pump
Shiyou jixieAs the development of unconventional oil and gas wells is increasingly difficult in China,the requirements are raised for the service life of hydraulic end of high-power fracturing pump in continuous fracturing operations with high power,ultrahigh ...
Yu Dawei, Tan Lijun, Shi Xijun
doaj
Deep Underground Science and Engineering, EarlyView.This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu +8 more
wiley +1 more source
Frequency Induced Hydraulic Fracturing [PDF]
, 2018 Gas, oil and ground water well stimulation, by dynamic hydraulic rock fracturing, is considered. Well borehole lateral drilling procedures and porous rock fracturing, by the application of hydraulic pressure, chemical and sand proppants, is addressed ...
Abdul-Ameer, Alaa
core
Deep Underground Science and Engineering, EarlyView.In response to the problem of strong mining pressure manifestation along the goaf roadway in a thick coal seam mining area, this study uses a new type of combined blasting roof cutting technology to effectively control the manifestation and deformation of mining pressure along the goaf roadway.
Xiaoding Xu +6 more
wiley +1 more source