Results 11 to 20 of about 164 (122)

Simultaneous Operations of Pregrouting and Shaft Drilling in Shaft Construction

Advances in Civil Engineering, 2020
In shaft construction, conducting shaft drilling and pregrouting simultaneously is expected to speed up the sinking rate and save the cost. Reasonable determination of the spatial locations of the drilled shaft and grouting holes and proper defining of ...
Zhipeng Xu, Xuhai Feng, Shengsheng Li, Liming Fan, Changwu Liu   +4 more
doaj   +2 more sources

Current situation and development trend of mechanized shaft driving in frozen shaft [PDF]

Meitan kexue jishu
In view of the energy occurrence structure of “rich coal, poor oil and little gas” in China, and the situation that coal will occupy the dominant position of energy consumption for a long time,The development history of frozen shaft mechanized drilling ...
Xiangsheng CHEN, Heng WANG, Zhaoyang SONG, Hanqing CHEN, Xi CHEN, Hang DING, Lei WANG   +6 more
doaj   +2 more sources

Research on vertical structure stability before cementing ultra-deep wellbore by drilling method

Meitan xuebao
To address the problem of vertical stability of ultra-deep wellbore by drilling method, firstly, the results of the equation of critical height of equal section for non-full counterweighted water drilled wellbore are compared with the results of the ...
Renliang SHAN, Tianyu HAN, Guoye JING, Jie TAN, Weijie LI, Dongjie QIAO, Zhenyu XU, Xinpeng FU   +7 more
doaj   +2 more sources

Diagnosis of the production cycle in the small shaft sinking.

, 2022
Shaft sinking is a classic activity in underground mines. In shafts with small cross-section or in mines with low mechanization indices it is common to use hand pneumatic drills and blasting by explosive gelatin in cartridges, employing natural draft ...
Neuppmann, Pedro Henrique, Silva, José Margarida da, Luz, José Aurélio Medeiros da   +2 more
core   +1 more source

Research and application progress of key technologies of drilling method for deep and thick water-bearing weakly cemented bedrock in western China

Meitan kexue jishu
The drilling method has been successfully applied in the shaft construction of deep water-bearing weak cemented bedrock in the west, which shows the development direction of less people, safety, green and intelligent well construction technology.
Hua CHENG, Zhishu YAO, Chuanxin RONG, Zongjin WANG, Jian ZHU, Longhui GUO, Xiaoyun WANG, Bao XIE   +7 more
doaj   +1 more source

The analysis of shaft sinking progress as a function of technical and organizational parameters

, 2019
In underground mines, where the deposit is located at considerable depths, mining shafts are key excavations. The project of making the deposit available requires selection of appropriate shaft sinking technology adapted to geological and hydrological ...
Bołoz, Łukasz, Łukasz Bołoz
core   +1 more source

Theoretical Analysis of the Vertical Stability of a Floating and Sinking Drilled Wellbore Using Vertical Elastic Supports

Applied Sciences
This study addresses the calculation of vertical stability for shaft walls during floating and sinking processes in deep vertical shaft drilling in Western China.
Zhiwei Zhang, Hua Cheng, Xiaoyun Wang, Bao Xie, Mingrui Sun   +4 more
doaj   +1 more source

Excavation and drilling at a spent-fuel test facility in granitic rock [PDF]

, 1981
Funding for a project to test the feasibility of safe and reliable storage and retrieval of spent fuel from a commercial nuclear reactor was approved by the Department of Energy on June 2, 1978. By May 28, 1980, 11 spent-fuel assemblies had been emplaced
Patrick, W.C., Mayr, M.C.
core   +1 more source

Miniaturized Bidirectional Thermal Stimulation System Integrated With an Electrode Array for Recording Neural Activities

Advanced Science, EarlyView.
This study presents a miniaturized bidirectional thermal stimulation system integrated with an electrode array enabling real‐time, bidirectional modulation and simultaneous recording of neural activity through localized heating and cooling. By monolithic integration of the Peltier element and with a silicon neural probe, the innovative system allows ...
Zoia Naumkina, Kanghwan Kim, Wesley Charles Smith, Keuntae Kim, Shinwoo Lee, Jiwan Woo, Il‐Joo Cho   +6 more
wiley   +1 more source

Pre‐Curved Everting Robots With Embedded Steering Intelligence Fabricated by CO2 Laser Welding

Advanced Intelligent Systems, EarlyView.
Design and experimental demonstration of a laser welded growing robot for anatomically guided navigation. The robot follows an aortic arch phantom entering the branchiocephalic branch through steering by design. The figure shows the physical phantom setup, CAD defined weld geometry and full robot eversion.
Brandon Saldarriaga, Panagiotis Kalozoumis, Panagiotis Vartholomeos, Carlo Seneci, Kawal Rhode, Christos Bergeles   +5 more
wiley   +1 more source