Results 101 to 110 of about 3,184,777 (174)

Modelling and performance of an active heave compensator for offshore operations

, 2007
The development of offshore oil and gas fields require the placement of different equipment on the sea floor. This is done by deploying the equipment from vessels operating in dynamic positioning on the surface.
Perez, Tristan, Tristan Perez, Steinmann, Paul, Paul Steinmann   +3 more
core   +1 more source

Properties of the self-expanding cement-based grouting material and its application

Results in Engineering
Aiming at the problems of large water-cement ratio and self-shrinkage of stone body in traditional cement-based grouting materials, the self-expanding cement-based grouting material was taken as the research object.
Shouqian Sheng, Dawei Yin, Xiao Qu, Hongfa Ma, Faxin Li, Xiushan Li   +5 more
doaj   +1 more source

Numerical studies of floor heave control by the rock bolts reinforcement technology in retained gob-side gateroad [PDF]

The effectiveness of modified rock bolts reinforcement technology for floor heave control in gob-side entry retaining was studied in this paper. A finite-element numerical simulation was used to analyse stress-strain state of surrounding rocks before and
Sakhno Svitlana, Sakhno Ivan, Cabana Edgar Caceres, Kamenets Viacheslav   +3 more
core   +2 more sources

ESTIMATION OF FLOOR HEAVE MECHANISM OF ROCK TUNNELS FOCUSED ON THE CHANGE IN WATER CONTENT

Journal of Japan Society of Civil Engineers, Ser. F1 (Tunnel Engineering), 2020
Keisuke SHIMAMOTO, Takeshi KAWAGOE, Kazuhide YASHIRO, Hiroaki KOBAYASHI, Atsumi ISOGAI   +4 more
openaire   +2 more sources

Study on Influencing Factors and Prediction of Tunnel Floor Heave in Gently Inclined Thin-Layered Rock Mass

In recent years, the construction of new railway tunnels worldwide has become increasingly challenging due to larger cross-sections, deeper burial depths, higher in situ stress, and more complex geological conditions.
Shunyu Wang, Tielin Chen, Hao Jiang, Xuexuan Yin, Rong Fan   +4 more
core   +1 more source

Floor Heave Control in Gob-Side Entry Retaining by Pillarless Coal Mining with Anti-Shear Pile Technology

The severe floor heave in gob-side entry retaining is the major restriction factor of the wide application of pillarless mining thin coal seams. Reinforcement and stress-relief floor heave control methods are the most promising.
Svitlana Sakhno, Ivan Sakhno, Krzysztof Zagórski, Anna Zagórska, Oleksandr Isaienkov, Krzysztof Skrzypkowski   +5 more
core   +1 more source

Rock Mass Bolting in Coal Mine Workings for Floor Heave Control

This article addresses the problem of floor heave in preparatory mine workings of the Karaganda Coal Basin and proposes technological solutions based on rock mass anchoring systems. Long-term field observations, supported by analytical interpretation and
Kainazarova Ainash, Piotr Małkowski, Nikita Ganyukov, Denis Akhmatnurov, Nail Zamaliyev, Vladimir Demin, Shulepin Andrey, Ravil Mussin   +7 more
core   +1 more source

Mechanism and control strategies of asymmetric floor heave under dynamic pressure in roof-cutting gob-side entry retaining: a case study. [PDF]

Sci Rep
Wang H, Liu K, Shao Z, Yang D, Zhang S, Wang S, Guo Z.   +6 more
europepmc   +1 more source

Sensitivity Analysis of Coal-Pillar Loading and Roadway Floor Heave in High-Intensity Longwall Mining: Implications for Pressure-Relief Design

Severe floor heave in gate roadways under high-intensity longwall mining is primarily controlled by mining-induced stress redistribution. Abutment pressure is preferentially transferred through the coal pillar into the floor, accelerating floor ...
Manchao He, Haosen Wang, Weiming Guan, Qian Qin, Fangcan Ji   +4 more
core   +1 more source

Set-Point Algorithms for Active Heave Compensation of Towed Bodies

, 2016
Active heave compensation is a technique used in marine applications to attenuate undesirable wave motions between a load and its host vessel. Motion attenuation is often achieved by reeling in or reeling out a cable tethering the load to the host vessel
Calnan, Clark
core