Results 71 to 80 of about 139,365 (154)
Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesThick hard roof with high strength, large breaking step and strong mine pressure is one of the major problems in coal mine safety production. Aiming at the problems of large thickness, high strength and difficult collapse of the roof slab of Yadian Coal ...
Shuo Ren +6 more
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Meitan kexue jishuAddressing the coupled challenges of strong mine pressure and gas, induced by large-span fracture of the hard roof during the mining of thick coal seams, a systematic understanding of the disaster mechanism through multi-field coupling of the hard roof ...
Bin YU +6 more
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Applied SciencesIn view of the high-level, thick, and hard roof in a mine in Shaanxi, it is difficult for existing technology to solve the problem of frequent rock bursts, which are caused by the direct weakening of the whole underground layer.
Qianyue Gu +5 more
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Field Report on the Excavation of Indian Villages in the Vicinity of the Spiro Mounds, Leflore County, Oklahoma [PDF]
, 2000 A wealth of strikingly unusual and beautiful objects of Indian manufacture were excavated from the burials of the Spiro Mound, Leflore (sic.) County, Oklahoma during 1936-37.
Orr, Kenneth G.
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Meitan xuebaoTaking the 11–3106 working face of Menkeqing Coal Mine as the research background, a fracture model of the structure covered by thick and hard overburden at the 11–3106 working face was established.
Mingyue WENG +5 more
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Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesTheoretical analysis, micro-seismic monitoring, and on-site research were used to examine the main disaster-causing strata of composite hard roof, with a particular focus on rockburst in the working face of thick coal seams.
Xukai Dong +4 more
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Prevention and control mechanism of deep-hole blasting in deep mining
Yantu gongcheng xuebaoMost of the coal mines in East China, Northeast China and North China have been mined below 600 m in depth, and dynamic disasters such as mine earthquakes have occurred frequently, which have seriously restricted the safety, green and efficient ...
ZHANG Quan 1, 2, ZOU Junpeng 1, WU Kunbo 1, JIAO Yuyong 1, JIANG Yujing 2, WANG Chao 3, YAN Xianyang 3
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Vol. 2 (pp. 677-1996). “Library notes” by researcher: summaries and long excerpts of testimony by workers about Margaret Schwartz’s death in the fire; engineers, laborers, and hardware dealer about condition of door casing, handrail, lock; and co-defendant/owner Max Blanck about his actions on day of fire [PDF]
, 1911 Vol. 2 (pp. 677-1996) “Library Notes,” picks up at page 677, continues to p. 1996 (61-page document), includes excerpts from transcript, more testimony from workers about the fire, what happened to Margaret Schwartz; testimony by engineer as to condition
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, 2013 My medicine has its own special place in our downstairs bathroom. It rests on a little metal shelf by the shower, standing among the bright orange bottles of multivitamins, B12, vitamin C, and calcium chews.
Kirkland, Chandra R
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Golemo Gradište at Konjuh: An Unidentified Late Antique City and Its Churches
, 2013 This article provides an overview of the city as we saw it in 2008.
Snively, Carolyn S.
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