Results 81 to 90 of about 34,329 (209)

The detection and tracking of mine-water pollution from abandoned mines using electrical tomography [PDF]

, 2009
Increasing emphasis is being placed on the environmental and societal impact of mining, particularly in the EU, where the environmental impacts of abandoned mine sites (spoil heaps and tailings) are now subject to the legally binding Water Framework and ...
Chambers, J.E., Klinck, B.A., Kuras, O., Meldrum, P.I., Ogilvy, R.D., Palumbo-Roe, B., Wilkinson, P.B.   +6 more
core  

Study of borehole stability of volcanic rock formation with the influence of multiple factors

Journal of Petroleum Exploration and Production Technology
Borehole instability in igneous rock formation has attracted more and more attention in recent ten years. In order to understand the mechanism of wellbore instability in igneous formation, a borehole stability model is established by applying the thermal,
Mingming Zhang, Jinglin Wen, Zhiming Xu, Zhiwei Xu, Jiang Feng, Xingdong Zhao   +5 more
doaj   +1 more source

Study on Rock Characteristics of Borehole Wall during Supercritical Carbon Dioxide Drilling

Shiyou jixie, 2022
Borehole instability seriously affects the drilling production. Studying the influence of supercritical carbon dioxide on the rock characteristics of drilling borehole is beneficial to ensure the borehole stability.
Meng Zhaofeng
doaj  

Horizontal borehole azimuth optimization for enhanced stability and coal seam gas production

Rock Mechanics Bulletin
Horizontal boreholes have been widely used to extract natural gas from coal seams. However, these boreholes can encounter severe instability issues leading to production interruption.
Erfan Saber, Qingdong Qu, Saiied M. Aminossadati, Yiran Zhu, Zhongwei Chen   +4 more
doaj   +1 more source

Limit of crustal drilling depth

Journal of Rock Mechanics and Geotechnical Engineering, 2017
Deep drilling is becoming the direct and the most efficient means in exploiting deep mineral resources, facilitating to understanding the earthquake mechanism and performing other scientific researches on the Earth's crust.
Y.S. Zhao, Z.J. Feng, B.P. Xi, D. Yang, W.G. Liang, Z.J. Wan   +5 more
doaj   +1 more source

Investigation of Borehole Stability in Malmberget

, 2012
Sublevel caving method is generally selected for large ore bodies with steep slope. This method is based on the gravity flow of the ore to get better recovery. Due to the continuous caving as the mining goes deeper, fractures of hanging wall occur consequently and thus it collapses into the cave.
openaire   +2 more sources

The measurement of long period and secular deformation with deep borehole tiltmeters [PDF]

Two clusters of instruments were emplaced in fractured bedrock in eastern Massachusetts in 1970 and 1975. The intrasite agreement at tidal periods was about two percent, but there is no agreement at longer periods.
Cabaniss, G. H.
core   +1 more source

GeoTechnical Investigations for the Dalton Highway Innovation Project As A Case Study of the Ice-Rich Syngenetic Permafrost [PDF]

, 2010
INE/AUTC 11 ...
Dillon, Matthew, Kanevskiy, Mikhail, O’Donnell, Jonathan, Shur, Yuri, Stephani, Eva   +4 more
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Status and Outlook for Research on Geothermal Heating Technology

Zhileng xuebao, 2021
Geothermal energy is widely used in building heating owing to its stability, large reserves, and wide distribution. Beginning from the classification of geothermal energy heating technology, this paper elaborates on the basic concepts, development ...
Wang Fenghao, Cai Wanlong, Wang Ming, Gao Yuan, Liu Jun, Wang Zhihua, Xu Han   +6 more
doaj  

Physical and mechanical characterization of the soft pyroclastic rocks forming the Orvieto cliff [PDF]

, 2002
The paper describes the results of laboratory and in situ investigations carried out on weak pyroclastic materials which could be encountered during engineering activities in volcanic regions.
RIBACCHI, Renato, ROTONDA, Tatiana, TOMMASI P   +2 more
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