Results 101 to 110 of about 9,068 (173)

FLAC3D Simulation of Caving Mechanism and Strata Fracture Response in Underground Mining

Mining
This paper presents an innovative numerical approach to simulating the progressive caving of rock mass in the overburden and floor during longwall mining.
Mahdi Saadat, Mattin Khishvand, Andrew Seccombe   +2 more
doaj   +1 more source

Powered Roof Support – Rock Strata Interactions on the Example of an Automated Coal Plough System

Studia Geotechnica et Mechanica, 2018
The study summarises the operating characteristics of the powered roof support (shield) used in an automated plough system. Investigated longwall support units were controlled automatically or by section engineers and positioned in the ‘saw tooth ...
Herezy Łukasz, Janik Dariusz, Skrzypkowski Krzysztof   +2 more
doaj   +1 more source

Coal/rock interface detection by sensitized pick, part A [PDF]

In order to increase the operating margins of the detector for safe, reliable operation under difficult in-mine conditions the transmitted signal strength was increased to provide additional signal margin for in-mine conditions and the transmitter ...
Erkes, J. W., Wu, P. T. K.
core   +1 more source

Study on the new layout pattern about the gob‐side entry under dynamic pressure and its surrounding rock stability control

Energy Science & Engineering
Though the recovery rate of coal resources can be effectively improved by adopting the gob‐side entry longwall face, which is also easy to cause tension between mining and excavation.
Meng Wang, Wenyu Wang, Yalong Xu, Guoliang Xie, Jianyun Qin, Honglin Liu, Sijiang Wei, Qingyun Xu   +7 more
doaj   +1 more source

Mechanical analysis of the structure of longwall mining hydraulic support. [PDF]

Sci Prog, 2020
Li T, Wang J, Zhang K, Zhang C.
europepmc   +1 more source

Coal-rock interface detector [PDF]

, 1979
A coal-rock interface detector is presented which employs a radioactive source and radiation sensor. The source and sensor are separately and independently suspended and positioned against a mine surface of hydraulic pistons, which are biased from an air
Crouch, C. E., Jones, E. W., Rose, S. D.
core   +1 more source

Strata behavior in longwall mining at greater depths [PDF]

, 2012
This thesis presents the overview of problems of underground coal mining at greater depth and reserve position of coal in India. Various strata control issues relate to stress distribution around the longwall panels at depths approaching 900m in ...
Singh, Deepanshu
core  

Applicability of siberian placer mining technology to Alaska [PDF]

, 1991
The result of Perestroyka and Glasnost has been an awakening of potential for cooperation between East and West. Nowhere has that been better demonstrated than between Alaska and Magadan Province, USSR. This report summarizes a one year effort financed
Barker, J.C., MacDonald, Rocky, Skudrzyk, F.J., Walsh, D.E.   +3 more
core  

Calculation of periodic roof weighting interval in longwall mining using finite element method [PDF]

, 2013
B Singh, Behdeen Oraee-Mirzamani, BHG Brady, E Hoek, E Hoek, GSP Singh, Kamran Goshtasbi, M Monjezi, Mehran Gholinejad, ML Jeremic, Navid Hosseini, PR Sheorey, R Trueman   +12 more
core   +1 more source

Report of activities of the advanced coal extraction systems definition project, 1979 - 1980 [PDF]

During this period effort was devoted to: formulation of system performance goals in the areas of production cost, miner safety, miner health, environmental impact, and coal conservation, survey and in depth assessment of promising technology, and ...
Isenberg, L., Lavin, M. L.
core   +1 more source