scholarly journals INFLUENCE OF JET FAN INSTALLED ON A CUTTER-LOADER ON AIR DRAG IN VERY LONG LONGWALL PANELS

2021 ◽  
Vol 2 (4) ◽  
pp. 32-40
Author(s):  
Stanislav A. Pavlov
Keyword(s):  
Longwall Mining ◽  
Air Flow ◽  
Mining System ◽  
Air Drag ◽  
Longwall Panel ◽  
Jet Fan ◽  
Forced Air ◽  
Volume Method ◽  
Method Show ◽  
Roof Support

The article presents studies into aerodynamic processes in very long longwall panels. The computations in ANSYS using the finite volume method show that air drag in longwalls varies versus position of the longwall mining system in the panel. Enhancement of ventilation efficiency in longwalls requires reduction in air drag. The longwall air drag is governed by the air drags of the powered roof support and cutter-loader. The latter have very large dimensions which are technologically unchangeable. For this reason, it is necessary to ensure forced air flow to by-pass the cutter-loader in the longwall panel. The estimate of advantages of the proposed method for the air drag reduction in very long longwall panels is presented. The method consists in increasing air flow rate in the longwall with the help of an axial jet fan mounted on the cutter-loader.

scholarly journals A Step-by-Step Procedure for Tests and Assessment of the Automatic Operation of a Powered Roof Support

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 697
Author(s):  
Dawid Szurgacz ◽  
Sergey Zhironkin ◽  
Michal Cehlár ◽  
Stefan Vöth ◽  
Sam Spearing ◽  
...  
Keyword(s):  
Automatic Control ◽  
Occupational Safety ◽  
Longwall Mining ◽  
Mining Operation ◽  
Primary Objective ◽  
Operating Conditions ◽  
Mining System ◽  
Step Procedure ◽  
Roof Rocks ◽  
Roof Support

A powered longwall mining system comprises three basic machines: a shearer, a scraper (longwall) conveyor, and a powered roof support. The powered roof support as a component of a longwall complex has two functions. It protects the working from roof rocks that fall to the area where the machines and people work and transports the machines and devices in the longwall as the mining operation proceeds further into the seam by means of hydraulic actuators that are adequately connected to the powered support. The actuators are controlled by a hydraulic or electro-hydraulic system. The tests and analyses presented in the developed procedure are oriented towards the possibility of introducing automatic control, without the participation of an operator. This is important for the exploitation of seams that are deposited at great depths. The primary objective was to develop a comprehensive methodology for testing and evaluating the possibility of using the system under operating conditions. The conclusions based on the analysis presented are a valuable source of information for the designers in terms of increasing the efficiency of the operation of the system and improving occupational safety. The authors have proposed a procedure for testing and evaluation to introduce an automatic control system into the operating conditions. The procedure combines four areas. Tests and analyses were carried out in order to determine the extent to which the system could be potentially used in the future. The presented solution includes certification and executive documentation.

scholarly journals EXPERIMENTAL APPROACH TO ASSESS EVAPORATIVE COOLING UNDER FORCED AIR FLOW

2017 ◽  
Vol 34 (1) ◽  
pp. 171-181 ◽  
Author(s):  
L. G. G. Rodrigues ◽  
E. I. B. Parisotto ◽  
B. A. M. Carciofi ◽  
J. B. Laurindo
Keyword(s):  
Experimental Approach ◽  
Air Flow ◽  
Evaporative Cooling ◽  
Forced Air

scholarly journals Study for Effective Cooling of Ni-MH Battery Module Using Forced Air Flow

2011 ◽  
Vol 14 (4) ◽  
pp. 253-260
Author(s):  
Chi-Yeong Ahn ◽  
Tae-Sin Kim ◽  
Jun-Bom Kim
Keyword(s):  
Air Flow ◽  
Forced Air ◽  
Battery Module ◽  
Mh Battery

scholarly journals The Roof Support Load Analysis for Pre-Driven Recovery Room Parameters Design

2020 ◽  
Vol 174 ◽  
pp. 01029
Author(s):  
Danil Zorkov ◽  
Alexey Renev ◽  
Konstantin Filimonov ◽  
Rinat Zainulin
Keyword(s):  
Formation Process ◽  
Recovery Room ◽  
Strain Condition ◽  
Stress Strain ◽  
Characteristic State ◽  
Roof Collapse ◽  
Longwall Panel ◽  
Load Analysis ◽  
Roof Support

Submitted by generalized experience entry longwall into pre- driven recovery room (PDRR) in foreign and Russian mine.Submitted by research characteristic state parameters of the roof at failed entry. Give a classification of roof collapse at the entrance longwall into PDRR.On the example of longwall panel 5а-10-18 mine Raspadskaya reviewed formation process of stress-strain condition in area for PDRR. Has been modeled process of entry longwall into PDRR in the conditions of heavy roof. Determine the expected load on the anchor and standing support, installed in the PDRR. Assessed the load on the longwall shield. When calculating the loads was taken into account the following parameters: width pre-driven recovery room, number of standing support in the PDRR and especially its placement, the rate of entry longwall into PDRR.

scholarly journals LFuji-air dataset: Annotated 3D LiDAR point clouds of Fuji apple trees for fruit detection scanned under different forced air flow conditions

Data in Brief ◽  
2020 ◽  
Vol 29 ◽  
pp. 105248 ◽  
Author(s):  
Jordi Gené-Mola ◽  
Eduard Gregorio ◽  
Fernando Auat Cheein ◽  
Javier Guevara ◽  
Jordi Llorens ◽  
...  
Keyword(s):  
Air Flow ◽  
Point Clouds ◽  
Flow Conditions ◽  
Apple Trees ◽  
Fuji Apple ◽  
Forced Air ◽  
3D Lidar
Sign in / Sign up

Export Citation Format

Share Document