Results 71 to 80 of about 844 (164)

Medicine for the Material World

Archaeometry, Volume 68, Issue 3, Page 434-439, June 2026.
ABSTRACT It is clear that many of the inorganic materials of antiquity have been used both as medicines for human ills and also as agents in technological processes. This paper speculates that there might have been a stronger link between these two functions in the past, based on the concept of “active agents”—materials that are efficacious at curing ...
A. M. Pollard
wiley   +1 more source

Application of drill-monitoring for chargeability assessment in sublevel caving

, 2019
Currently, the charging procedure for sublevel caving mining is carried out with no prior information of the rock mass condition. Thus, engineers are blindsided to unexpected rock conditions and ill-prepared to address issues associated with collapsing ...
Johansson, Daniel,, Schunnesson, Håkan,, Navarro, Juan,, Sanchidrián, José Ángel,, Ghosh, Rajib,, Segarra, Pablo,   +5 more
core   +1 more source

Prioritizing bat roosts for conservation with a global multicriteria bat roost priority index based on community science

Conservation Biology, Volume 40, Issue 3, June 2026.
Abstract Prioritization in conservation is crucial for the development of efficient and effective decision‐making policies. For many decades, the importance of some species and their habitats has been assessed and applied in conservation legislation, but bats and their diurnal roosts have ofbeen overlooked.
David López‐Bosch, Krizler Tanalgo, Xavier Puig‐Montserrat, Ferran Páramo, Eric Marín, Carles Flaquer, Adrià López‐Baucells   +6 more
wiley   +1 more source

Study on Prevention and Control Measures of Water–Sand Inrushes Based on Adaptive Adjustment of Mined Thickness

, 2023
There have been frequent occurrences of water–sand inrushes in underground mines due to irregular mining activities under thick loose gravel layers.
Jun Wang, Ye Lian, Tao Li, Qin Liu
core   +1 more source

Rule-based expert system to assess caving output ratio in top coal caving.

PLoS ONE, 2020
Coal mining professionals in coal mining have recognized that the assessment of top coal release rate can not only improve the recovery rate of top coal, but also improve the quality of coal.
HaiYan Jiang, Qinghui Song, Kuidong Gao, QingJun Song, XieGuang Zhao   +4 more
doaj   +1 more source

Feasibility study and optimal coal drawing process for fully mechanized caving in close-distance extra-thick coal seams

Gong-kuang zidonghua
Research on optimal coal drawing parameters for working faces with significant variation in seam thickness, where the thickness exceeds the standard mining height in close-distance coal seams, has been limited.
ZHANG Wei, GAO Peng, CUI Bo, Asihaer·Niyazibieke, PAN Weidong   +4 more
doaj   +1 more source

Research and application of top coal caving characteristics at end of fully mechanized caving working face in hard and thick coal seam with super large mining height

Meitan xuebao
Fully-mechanized caving mining with super-large mining height is an effective method for safe and efficient mining of thick and extra-thick coal seams. Aiming at the problem of poor top coal caving ability at the end of fully-mechanized caving mining in ...
Ying MA, Shijun LIU, Ziyan MA, Duanzhi MA   +3 more
doaj   +1 more source

Rib stability: A way forward for safe coal extraction in India [PDF]

, 2017
Ensuring rib stability during pillar extraction is of prime importance in bord and pillar (B&P) method of underground coal mining with caving. Rib stability has been assessed here by way of assessing factor of safety (FOS), a ratio of the strength of rib
Awanindra, Singh P, Satyendra, Singh K, Harshit, Agrawal   +2 more
core   +1 more source

Study on development height of water-conducting fracture zone in overlying strata based on borehole permeability coefficient variation

Meikuang Anquan
As coal resources continue to be depleted, mining faces are gradually extending to deeper levels, where they are confronted with complex geological conditions such as high-pressure confined water and high in-situ stress, leading to an increasing risk of ...
Junpeng YANG, Kai BIAN, Cunjin LU, Ming YUAN, Junbin CHANG, Xiaofeng YANG   +5 more
doaj   +1 more source

Ege linyitleri işletmesi (ELİ) Eynez yeraltı ocağı mekanize uzunayak panosu tavan kömürü üretiminin sayısal modellemesi

, 2013
Boren;DEMiR Export;et al;metso Expect results;Outotec;TMMOB Maden Muhendisleri Odasi23rd International Mining Congress and Exhibition of Turkey, IMCET 2013 -- 16 April 2013 through 19 April 2013 -- Antalya -- 105453Effective caving of top coal is the ...
Ünver, Bahtiyar, Bayram, Fatih, Yaşıtlı, Nazmi Erhan, Kavaklı, Nevzat   +3 more
core