The paper presents prediction of wear of roadheader picks using numerical simulations. Estimation of wear has been included into the numerical model of rock cutting based on the discrete element method. The amount of wear is calculated using the 1. Introduction1. Introduction. The longitudinal shaft roadheader is the mainstream fully mechanized roadheader in coal mine at present, and the movement track of its cutting head directly affects the surface topography of the roadway. The study shows that the surface roughness of roadway will affect the propagation characteristics of electromagnetic wave of wireless communication in the coal mine.
This paper uses the method of numerical simulation of cutting process of cutting pick and cutting head and gets the cutting load rule at different properties of coal and rock. Numerical simulation method can take an integrated consideration of the characteristics of coal and rock to the impact of the cutting process, which greatly improves the cutting test results. Cutting - Idioms by The Free DictionaryDefinition of cutting in the Idioms Dictionary. cutting phrase. What does cutting eion mean? Study on Roadheader cutting load at different properties of coal and rock. AE signals during laser cutting of different steel sheet thicknesses. Cutting trajectory planning of sections with complex May 15, 2018 · Li, X, Huang, B, Ma, G Study on roadheader cutting load at different properties of coal and rock. Scientific World Journal 2013 ; 2013:1 8 . Google Scholar
To investigate the mechanical behavior and load torque of the cutting head in the rock fragmentation process, a numerical model was developed based on fracture mechanics and finite element method. And then, rock fragmentation and factors influencing the force of cutting head were investigated. The good agreement of variation characteristics of cutting torque between experimental results and Prediction of roadheaders' performance using artificial Oct 01, 2015 · Performance prediction is an important issue for successful roadheader application and generally deals with machine selection, production rate and bit consumption. The main aim of this research is to investigate the cutting performance (instantaneous cutting rates (ICRs)) of medium-duty roadheaders by using artificial neural network (ANN) approach. Roadheader - definition of roadheader by The Free DictionaryStudy on Roadheader cutting load at different properties of coal and rock With the slower pit-bottom excavation work being completed in June 2010, one of those machines, the roadheader, was deployed in the west to join a continuous miner. Pike River Coal
Figure 7:Study on Roadheader Cutting Load at Different Properties of Coal and Rock The needle penetration index to estimate the performance Nov 27, 2018 · The point load index tests and XRD analysis were conducted on the samples. Point load index test. The point load tests were performed on the prismatic samples (Fig. 6) prepared dry cutting with diamond saw, since core samples could not be prepared for the UCS tests due to the weakness of the samples. The tests were repeated at least seven times Study on Roadheader Cutting Load at Different Properties The Scientific World Journal (2013-01-01) . Study on Roadheader Cutting Load at Different Properties of Coal and Rock