Results 41 to 50 of about 159,695 (300)
Advances in Civil Engineering, 2018 Ultra-thick hard sandstone roofs present high thickness, poor delamination, and wide caving range. The strata pressure of the working face during actual mining increases, having a significant influence on the safe mining of the working face.
Feng Ju +4 more
doaj +1 more source
Key Parameters of Roof Cutting of Gob-Side Entry Retaining in a Deep Inclined Thick Coal Seam with Hard Roof [PDF]
Energies, 2019 Gob-side entry retaining by roof cutting (GERRC) employed in a deep inclined thick coal seam (DITCS) can not only increase economic benefits and coal recovery, but also optimize surrounding rock structure. In accordance with the principles of GERRC, the technology of GERRC in DITCS is introduced and a roof-cutting mechanical model of GERRC is proposed ...
Jinzhu Hu +5 more
openaire +2 more sources
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
doaj +1 more source
The engineering geology of the Nottingham area, UK [PDF]
, 2009 Nottingham was built near a crossing point on the River Trent in the East Midlands of England. Initially, the City developed on a low sandstone hill close to the north bank of the river, which provided a secure, well-drained location above the marshes ...
Bell, F.G. +3 more
core +1 more source
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)
core +3 more sources
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
doaj +1 more source
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.
core +1 more source
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
doaj +1 more source
Numerical simulation on fracturing behaviour of hard roofs at different levels during extra-thick coal seam mining [PDF]
Royal Society Open Science, 2020 In fully mechanized caving mining of extra-thick coal seams, the movement range of overburden is wide, resulting in the breakage of multilayer hard roofs in overlying large spaces. However, the characteristics, morphology and impact effect of hard roofs at different levels are different and unclear.
Rui Gao +3 more
openaire +3 more sources
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
doaj +1 more source