Results 101 to 110 of about 7,043 (214)

Environmental geology study: parts of west Wiltshire and south-east Avon [PDF]

, 1985
The objective of this study has been to collect and interpret the available environmental geology data and to use it to compile a set of thematic maps and this report.
Forster, A., Hobbs, P.R.N., Monkhouse, R.A., Wyatt, R.J.   +3 more
core  

Current status and prospects of surrounding rock control and intelligent coal drawing technology in fully mechanized caving face

Gong-kuang zidonghua
This paper analyzes the current status and existing issues in the control technology of surrounding rock and intelligent top coal caving technology for thick and ultra-thick coal seams in fully mechanized caving faces.
PANG Yihui, GUAN Shufang, JIANG Zhigang, BAI Yun, LI Peng   +4 more
doaj   +1 more source

Technology Research on the Fourth Panel Mining Large Height Fully-mechanized Caving Mining in Shangwan Coal Mine

MATEC Web of Conferences, 2015
According to the characteristics of the 1-2 coal seam of Shangwan coal mine 4th panel, this research analyzed the feasibility of sublevel caving hydraulic support in the fully-mechanized mining face through estimation method and numerical simulation ...
Liu Yingjie, Wang Xiaomou
doaj   +1 more source

Some key problems on estimation of height of water-conducting fractured zone for thick coal seam top coal caving

矿业科学学报
The height of water-conducting fractured zone is an important indicator for ensuring safe mining of coal resources under water bodies. In view of the problems and deficiencies to quote empirical formula for top coal caving in thick coal seams, the basis ...
CUI Ximin, CHE Yuhang, SUN Shuaihui, LI Peixian, SUN Hao, XU Zhihua, YUAN Debao, JIANG Jinbao, ZHAO Yuling, MALINOWSKA A   +9 more
doaj   +1 more source

Экологические аспекты добычи и обогащения калийных солей на горно-обоготительных комбинатах [PDF]

, 2017
В статье дается характеристика производства калийных удобрений, рассматривается принцип работы горно-обогатительных комбинатов. Особое внимание уделяется процессу обогащения калийных солей, поскольку он представляет собой угрозу для окружающей среды.The ...
Грачева, Н. В., Копейкина, А. А., Сеимова, Г. В.   +2 more
core  

Research progress on intelligent coal caving theory and technology

Gong-kuang zidonghua
The longwall top-coal caving technology is an effective method for extracting thick and ultra-thick coal seams, and it has become a hallmark technology in China's coal mining industry.
WANG Jiachen, YANG Shengli, LI Lianghui, ZHANG Jinwang, WEI Weijie   +4 more
doaj   +1 more source

Break Even Analysis of Mining Projects [PDF]

, 2010
The economics of the resources industry are unique. All mining is subject to uncertainties not applicable to other industries. Every mine is different. Industry economics are difficult to quantify and categorize. Information is very costly.
Ahmad , F, Chauhan, H K
core  

Characterization and simulation of the coal-rock boundary equation on the upper and lower sides of the inclined coal caving opening

Meitan kexue jishu
In order to explore the top coal release law of the fully mechanized top coal caving face under different inclination angles, taking the 0291 fully mechanized caving face of Tangshan Mine as the research background, a comprehensive research approach ...
Guanghua ZOU, Jiannan YANG, Shufang GUAN, Zhigang JIANG, Mingqiang WANG, Haoyu SHI   +5 more
doaj   +1 more source

Requirements for the conceptual design of advanced underground coal extraction systems [PDF]

Conceptual design requirements are presented for underground coal mining systems having substantially improved performance in the areas of production cost and miner safety. Mandatory performance levels are also set for miner health, environmental impact,
Gangal, M. D., Lavin, M. L.
core   +1 more source

Experimental research on overlying strata movement and fracture evolution in pillarless stress-relief mining [PDF]

, 2015

core   +1 more source