Results 31 to 40 of about 689,431 (233)

Effect of Water on Deformation of Mine Roadways

Journal of the Japan Society of Engineering Geology, 1988
The basic requirement of roadway in a mine is to provide sufficient height and cross section consistent with adequate support to meet the needs of accomodation of equipment, transport, personnel travel and ventilation. However, many roadways are deformed to the extent of needing maintenance, generally dinting, and in some cases requiring re-ripping.The
ICHINOSE, Masatomo, MATSUI, Kikuo
openaire   +2 more sources

Deformation and failure rules of underlying roadway of cross mining in ultra-thinness coal seam

Meikuang Anquan, 2021
Aiming at the problem of deformation and destruction of the overlying roadway of overhead-mining in very thin seam, the research methods of measuring the roadway loosening circle and 3D laser scanner to monitor the deformation of the roadway using ...
SONG Kanglei, WANG Hongtu, WAN Liangliang, SHU Cai
doaj   +1 more source

Rapid roadway drivage in coal mining

, 1985
A variety of equipment is being used for roadheading and tunneling in the mining industry. In United States drum-type continuous miners are used most extensively. In Europe and Canada mine roadways are driven mainly by roadheaders. The application of tunnel boring machines to coal mining is somewhat recent. Such machines are however being used on major
R K Singhal, D B Stewart
openaire   +1 more source

Research on mining damage characteristics of roadway support structure in high stress area

Gong-kuang zidonghua, 2021
There are fissures in the surrounding rock of the roadway in the high stress area, and the support structure is more likely to develop instability and damage due to mining.
CHANG Lizong, SU Xuegui, DU Xianjie, YANG Pengbo, GUO Maomao   +4 more
doaj   +1 more source

Mechanism and countermeasures of abandoned roadway collapse in three-roadway stope mining one side pillar

, 2021
In order to find out the reason of large area roof cutting and caving in abandoned roadway during the mode of mining one side pillar and three-roadway arrangement of 202 working face in Daning Coal Mine, based on the field observation and theoretical ...
HAN Shuyi, YANG Shuangsuo, BAI Yunlong, MA Jinmin, SHI Jinsong, HAN Junxiao, CHENG Lingyu
core   +1 more source

Mechanical properties and damage evolution mechanisms of polyurethane grouting materials for roadway reinforcement

Case Studies in Construction Materials
Chemical grouting reinforcement technology is a crucial method for enhancing the stability of roadway surrounding rock. This study focuses on a novel polyurethane-based composite polymer grouting material, systematically analyzing the mechanical response
Zijun Han, Hongtao Liu, Qinyu Liu, Jialu Liang, Xiaofei Guo, Yang Chen, Zhen Hao, Qiang Yao   +7 more
doaj   +1 more source

Real‐time lithology identification while drilling based on drill cuttings image analysis with ensemble learning

Deep Underground Science and Engineering, EarlyView.
A lithology identification while drilling method was developed, integrating an automated cuttings sampling system, a smart drilling rig, and an ensemble learning model. Underground trials achieved 97.42% accuracy in real‐time identification of cuttings lithology and composition, enhancing hazard management and supporting unmanned drilling technology in
Kun Li, Ting Ren, Ningping Yao, Jon Roberts, Haitao Song, Zhongbei Li, Xueqiu He, Liang Zhao   +7 more
wiley   +1 more source

Damage evolution and failure warning in early-age flexible-formwork concrete for underground support

Geohazard Mechanics
The evolution law of mechanical properties and damage characteristics of early-age flexible formwork filling concrete have a decisive influence on the stability control of surrounding rock of large deformation roadway.
Zijun Han, Hongtao Liu, Xiaofei Guo, Jialu Liang, Zhongjin Qiao, Chenxiao Cao, Lei Guo, Xiaogang Chen   +7 more
doaj   +1 more source

Use of Air-and-Water Spraying Systems for Improving Dust Control in Mines

Journal of Sustainable Mining, 2013
This article describes air-and-water spraying systems, designed at the KOMAG Institute of Mining Technology, used in longwall shearers, in roadheaders, at transfer points of conveyors and in roadways. The simple and lightweight design of roadway spraying
Dariusz Prostański
doaj   +1 more source

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