Results 31 to 40 of about 139,472 (275)
New meanings from old buildings [PDF]
, 2001 The three modest house projects described here are by three fellow travellers — the two authors and David Lea — interested in the Organic side of Modernism.
Blundell Jones, P., Sergeant, J.
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Meikuang Anquan, 2022 In order to improve the recovery rate of coal resources in general, Chengzhuang Coal Mine has carried out and implemented the technology of gob-side entry retaining in 5309 large height mining face.
SI Xiaopeng, ZHOU Changtai
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The House of Kwee Sik Poo an Indonesian-Chinese Merchant From Pasuruan [PDF]
, 2017 The Kwee family is an old Indonesian-Chinese family from Pasuruan, in East Java, and one of a few merchant families of either Chinese or Arab ethnic origin which led successful lives in this small town in the nineteenth century.
Sien, K. H. (Kwee)
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Meitan xuebao, 2023 The stope space, after mining an extra-thick coal seam with hard roofs, is large, and its law of mining pressure is complex. The mechanism of strong mine pressure action for this stope is unclear, and there is a lack of multi-point control technology ...
Bin YU +7 more
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Meitan kexue jishu, 2023 To solve the problems of small local relief range, low continuity and high operational risk of rockburst, regional hydro-fracking and burst prevention system and engineering application research were carried out within thick and hard roof of a coal seam ...
PAN Junfeng +9 more
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Meitan kexue jishuTo address the issue of rock burst disasters induced by the fracture of thick-hard roof strata, focuses on deep thick and hard roof. By integrating theoretical analysis, engineering experiments, and field monitoring, the fracture characteristics of thick-
Erhu BAI +6 more
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Rock burst mechanism induced by stress anomaly in roof thickness variation zone: a case study
Geomatics, Natural Hazards & Risk, 2022 The variation of hard roof thickness is an essential contributor in triggering rock bursts during longwall mining. Case analysis and numerical modeling were used to study the stress and energy characteristics of the coal and rock mass and its fracture ...
Xianxi Bai +6 more
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Laboratory studies of a high-strength roof bolting by means of self-extending mixtures [PDF]
, 2019 Purpose is to analyze parameters of a new method to fasten roof bolts with the help of nonadhesive mixtures extending while hardening along with the development of high expansion pressures. Methods.
Isaienkov, O +3 more
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Optimization Analysis of Advanced Support for Thick and Hard Roof
International Journal of Natural Resources and Environmental StudiesBased on the geological conditions of 1033 working face in Yuandian No.1 Coal Mine, this paper studies the support distance and support strength of hydraulic support in the advanced section of roadway roof. Through numerical simulation analysis, the advance support range of the advance roadway is 5m, 10m, 15m, 20m and 25m four kinds of distance plastic
Yongkun Zhang, Kaiwei Wang
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Study on the Spatiotemporal Dynamic Evolution Law of a Deep Thick Hard Roof and Coal Seam
Processes, 2023 Underground mining in coal mines causes strong disturbance to geological structures and releases a large amount of elastic strain energy. When the roof is a hard and thick rock layer, it is easy to cause dynamic disasters such as rock burst. To analyze the impact of a deep thick and hard roof fracture on the safe mining of thick coal seams, this paper ...
Zhigang Zhang +6 more
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