Results 181 to 190 of about 1,123,828 (350)

Next-gen geothermal could bring clean power to much more of the planet. [PDF]

Proc Natl Acad Sci U S A
Battersby S.
europepmc   +1 more source

Spatial Variations in Methane Content and Their Main Controlling Factors of the Deep‐Buried Coalbed in the Nalinhe–Hengshan Area, Ordos Basin

Energy Science &Engineering, EarlyView.
Ash yield is the primary geological factor controlling the spatial variations in the total gas content of the deep‐buried coalbed methane in the Nalinhe‐Hengshan area, Ordos Basin. However, porosity dominates the differential enrichment of the free gas content of the deep‐buried coalbed methane in the Nalinhe‐Hengshan area, Ordos Basin.
Shi Yunhe, Wang Kangle, Wang Huaichang, Wang Yufei, Zhang Hui, Cao Jingjing, Yin Liangliang, Hu Xinyou, Liang Chao, Liu Mina   +9 more
wiley   +1 more source

Instability mechanism of deeply buried coal seam floor under mining effects and optimization of extraction roadway layout. [PDF]

Sci Rep
Chen X, Ma R, Zhou Y, Li J, Xu Y, Chen J.   +5 more
europepmc   +1 more source

Research on Optimal Width of Coal Pillars in Both Sides of Abandoned Mining Areas and Tunnel Control Technology

Energy Science &Engineering, EarlyView.
This study primarily investigates the optimal width for coal pillar retention in both sides of the worked‐out face section. Taking the 42201 haulage roadway of the 42201 working face at Shengxin Coal Mine as the primary research target, it analyses the optimum width for coal pillar retention through theoretical calculations, numerical simulations, and ...
Shuaifeng Yin, Kanglei Han, En Wang, Yitao Yan, Xubo Zhao   +4 more
wiley   +1 more source

Effect of the Solidifiable Spacer Fluid System on Hydraulic Sealing Ability of the Cement Sheath-Formation Interface. [PDF]

ACS Omega
Feng B, He L, Ou B, Yan YC, Zhang SJ, Hu DL, Li ZY, Chen W, Li J, Wu XN.   +9 more
europepmc   +1 more source

Submarine Rock Drills [PDF]

Scientific American, 1877
openaire   +1 more source

Analysis and Optimization of Early‐Warning Indicators for Impact Critical Stress in Deep Soft Coal Seams

Energy Science &Engineering, EarlyView.
This study determines the impact critical stress early‐warning indicators for deep soft coal seams: 18 MPa (shallow holes), 20 MPa (deep holes), and 3 MPa/d daily stress change rate, via theoretical, experimental and simulation methods. ABSTRACT The accurate determination of early‐warning indicators for critical impact stress in deep soft coal seams is
Haichen Yin, Xiufeng Zhang, Atao Li, Yanliang Wang, Long Yuan, Chaohong Shi, Yang Chen, Caiping Lu, Liangjin Jiang   +8 more
wiley   +1 more source

Composite filter-based detection of rock joints from drilling parameters. [PDF]

Sci Rep
Tong J, Zhang Y, Huang H, Xiong J, Luo Y.   +4 more
europepmc   +1 more source

Chemical Composition, Amino Acids, Phenolic Profiles and Bioavailability of Minerals in Livingstone Potato (Plectranthus esculentus) as Affected by Different Processing Techniques

Food Chemistry International, EarlyView.
Boiling retained the nutrients and polyphenol compounds in Plectranthus esculentus tubers better than frying or roasting. A bioavailability study showed that the phytates and oxalates in the tuber may not affect the bioavailabilities of calcium, zinc, or iron in Plectranthus esculentus tubers when eaten.
Mercy Amarachi Iroaganachi, Chinedum Ogbonnaya Eleazu, Kate Eleazu, Adanma Ironkwe, Winner Kalu   +4 more
wiley   +1 more source

Study on Damage and Tensile Properties of Thermal-Treated Granite Under Different Thermal Shock Conditions. [PDF]

Materials (Basel)
Li K, Zhao X, Wang H, Li D, Dang D, Xi Y.   +5 more
europepmc   +1 more source