Results 91 to 100 of about 24,051 (297)

Multiple injection techniques to stimulate complex fracture networks in coal reservoirs: A case study on gas disaster reduction of subsurface coal mine in southwest China

Deep Underground Science and Engineering, EarlyView.
An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang, Farui Shi, Jun Lu, Minghui Li, Cunbao Li, Heping Xie   +5 more
wiley   +1 more source

Sedimentology of the Mid-Visean limestones of the southern part of the Askrigg Block, North Yorkshire

, 1984
The earliest Carboniferous deposits, resting with profound unconformity on Lower Palaeozoic rocks, have been mapped across their entire outcrop area on the Askrigg Block.
Scott, Gillian
core   +1 more source

Gaborlet‐guided sparse filtering: A novel intelligent method for lithology identification by vibration signals while drilling

Deep Underground Science and Engineering, EarlyView.
The flowchart illustrates rock specimen testing, vibration signal acquisition, and feature extraction with Gaborlet and sparse filtering for classification. Abstract Traditional lithology identification methods mainly rely on core sampling and well‐logging data.
Jian Hao, Danqi Zhang, Zhenqi Song, Jinrui Wang, Qi Wang, Heqing Liu   +5 more
wiley   +1 more source

Carbonate Sedimentation and Diagenesis of Pleistocene Limestones in the Bermuda Islands [PDF]

, 1961
NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. The Recent carbonate sediments in the Bermuda Islands consist largely of skeletal fragments of marine organisms.
Gross, Meredith Grant
core   +1 more source

Dynamic geo‐hydrogeological monitoring‐driven situational awareness for real‐time floor water inrush risk prediction in deep mining

Deep Underground Science and Engineering, EarlyView.
The fused data extracted from the distributed monitoring system as the data basis, combined with dynamic geological data, are imported into a deep learning model. As the geological conditions of mining and excavation change, the risk of water inrush at the working face is retrieved in real time.
Yongjie Li, Huiyong Yin, Fangying Dong, Tao Wu, Chao Zhang   +4 more
wiley   +1 more source

Descripción, Clasificación y Aspectos Geológicos de las Zonas Kársticas de Costa Rica Description, Classification and Geological Aspects of the Karstic Regions of Costa Rica

Revista Geológica de América Central, 2011
En Costa Rica el fenómeno kárstico afecta principalmente a rocas carbonatadas, constituyendo 0,85% del territorio nacional, con un área aproximada de 430 km².
Andrés Ulloa, Teresita Aguilar, Carlos Goicoechea, Ronald Ramírez   +3 more
doaj  

Performance assessment of a potential underground thermal storage facility: Case study of the closed mine Prosper‐Haniel in the Ruhr coal mining area in Germany

Deep Underground Science and Engineering, EarlyView.
This study demonstrates the feasibility of an underground closed‐loop thermal storage facility at a post‐mining site, intended for seasonal heat energy storage. Its principal design shows water flow directions in winter and summer (1, 2), heat pumps (3), an upper water reservoir (4), and connecting pipes (5).
Dmytro Rudakov, Oleksandr Inkin
wiley   +1 more source

Palaeomagnetism of Upper Cretaceous limestones from the Munster Basin, Germany [PDF]

, 1979
Marine, mainly flat-lying sediments of Late Cretaceous age are exposed throughout a wide area of the Munster Basin (NW-Germany). During the Cenomanian, Turonian, and Campanian fine-grained, grey, marly to pure limestones were deposited.
Heller, F., Channell, J.E.T.
core   +1 more source

Strengthening the historical constructions made of limestone by treating with silicic acid based material

MATEC Web of Conferences, 2018
The paper a comparative study of limestones treated with the composition Oxal NK100 for increasing the durability of the limestones in historical buildings and the other limestones without any additives to investigate the effect of the composition Oxal ...
Sabri Mohanad, Korneeva Elena
doaj   +1 more source

Upper bound limit analysis of coral reef limestone cavern roof stability incorporating a tension‐shear failure mechanism with tensile‐strength cut‐off

Deep Underground Science and Engineering, EarlyView.
For the roof of coral reef limestone caverns, a novel tension‐shear composite failure mechanism was developed. The most critical tensile crack model was identified using a hybrid optimization algorithm, and the stability of the cavern roof was analyzed accordingly.
Dongsheng Xu, Chenxu Li, Chuantan Hou
wiley   +1 more source