Results 91 to 100 of about 9,646,321 (185)

Research on failure characteristics of floor heave and support technology in coal roadway

Gong-kuang zidonghua, 2019
In view of problem of floor heave failure in coal seam roadway, taking 53082 roadway of a mine as the research object, the stress state, displacement distribution and failure form of surrounding rock during the roadway excavation were analyzed and ...
ZHANG Yuxu, WANG Ke
doaj   +1 more source

New Shop Floor Control Approaches for Virtual Enterprises [PDF]

The virtual enterprise paradigm seems a fit response to face market instability and the volatile nature of business opportunities increasing enterprise’s interest in similar forms of networked organisations.
José Barata, Luís Ribeiro
core  

Research on Mechanism and Control of Floor Heave of Mining-Influenced Roadway in Top Coal Caving Working Face

, 2020
The stability of the surrounding rock is the key problem regarding the normal use of coal mine roadways, and the floor heave of roadways is one of the key factors that can restrict high-yield and high-efficiency mining.
Yanlei Kang, Zeyang Wang, Xuan Wu, Huicong Xu, Xingping Lai, Pengfei Shan   +5 more
core   +1 more source

Numerical Studies of the Floor Heave Control Method in Gob-Side Entry Retaining in Deep Coal Mines

Geotechnics
In the case of pillarless coal mining, the floor uplift reaches 60–80% of the total vertical convergence in gob-side entry, while total convergence often exceeds 1.0 m.
Ivan Sakhno, Svitlana Sakhno, Oleksandr Kyrsanov, Serhii Bashynskyi, Oleksandr Nosach, Liubov Shaidetska, Denys Darmostuk   +6 more
doaj   +1 more source

Experimental Study on Anti-Shear Properties of Floor Heave Control Anchor of Deep Soft Rock

, 2011
With the increase of Chinese mining depth, the deformation of deep soft rock is an increasingly serious problem, such as floor heave. The shear experiments of the different types of anchor were carried out. The results show that the anti-shear properties
Hai Yan Ju, Kai Hua Zeng, Chun Guang Wang   +2 more
core   +1 more source

Frost heave control measures for the frozen double-line tunnel undercrossing an operation station

Meitan xuebao
Aiming at the frost heave characteristics of long-distance and large-section underground freezing projects in cities, the double-line tunnel of Shanghai Metro Line 18 undercrossing an operation station was select as an example,a three-dimensional ...
Xiangsheng CHEN, Hang DING, Fangzheng LI, Xi CHEN, Wei GAO, Heng WANG, Lei WANG, Hanqing CHEN   +7 more
doaj   +1 more source

Method for controlling the floor heave in mine roadways of underground coal mines

Mining of Mineral Deposits, 2022
Ivan Sakhno, Iaroslav Liashok, Sakhno Svitlana, Isaienkov Oleksandr   +3 more
openaire   +1 more source

Numerical Simulation Study on Crosscut Roadway Floor Heave Control

Academic Journal of Engineering and Technology Science, 2023
openaire   +1 more source

Study on the Mechanisms of Floor Heave in Roadways and Control Strategies via Grooving and Pressure Relief

Processes
With the increasing depth of mining operations, roadways experience higher ground stress and pronounced deformation. Elevated in situ stress leads to a continuous rise in vertical stress on surrounding rock. The excavation of roadways and working faces further redistributes the stress field, resulting in more frequent and severe floor heave. To address
Li, Tongxi, Hao, Bingyuan, Shi, Chaoyao
openaire   +1 more source

Heave prediction techniques and design consideration on expansive soils

, 1990
Civil Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia Phone: +(966-1)467‑77038 Email: adhowian@ksu.edu.saExpansive soil has been responsible for many structural damages that result in great ...
Abdulmohsin W. Dhowian, Dhowian, Abdulmohsin W.   +1 more
core   +1 more source