Results 131 to 140 of about 730,496 (259)
Geology Library Twenty-Third Annual Report 1958-1959
, 1959 Contents: Personnel, Circulation, Hours of Opening, Guidebooks, Guidebook file, Reprints, Geology theses, Maps, Notable additions to the Book Collection, ObjectivesUT ...
Lynn Guion, Thelma
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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
Frontiers in Earth SciencePetroChina Tarim Oilfield has established China’s largest ultra-deep hydrocarbon production base, with over 180 wells drilled to depths exceeding 6,000 m.
Yixiong Hu +18 more
doaj +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
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Youqicang pingjia yu kaifa, 2020 Reservoir effectiveness is a key factor restricting the efficient development and also one of the difficulties in reservoir evaluation. Formation C and J of the T oilfield in Syria are carbonate fractured reservoirs.
JIA Jun
doaj
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
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The Geology of the Franciscan Complex in the Ward Creek-Cazadero Area, Sonoma County, California
, 1995 Original publisher: Department of Conservation Division of Mines and Geology. This version includes the author's correction to Photo 3.In 1963, Coleman and Lee published their classic study of the glaucophane-bearing metamorphic rocks in a small exposure
Erickson, Rolfe
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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
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Indonesian Journal of Earth SciencesThe electrical resistivity method was used to conduct a detailed examination of subsurface geology and hydrogeological parameters at the Petroleum Training Institute (PTI) Main Campus in Effurun, Nigeria.
Odunayo Tope Ojo +2 more
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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