X. Liu, S. Liu, and P. Tang, "Coal fragment size model in cutting process," Powder Technology, vol. 272, pp. 282-289, 2015.Liu X.H., Liu S.Y., Tang P.: Coal fragment size model in cutting process, In: Powder Te
In the confined spaces of underground mines, the exposure of over 10,000 miners in the U.S. to diesel exhaust and diesel particulate matter (DPM) is an occ
The preparation process of natural plungers is stated as follows step by step. Step 1: Plunger cutting. The geometrical parameters were determined according to corresponding standards of tests mentioned in the first section of this paper and then inputted into the Computer Numerical Control (CNC) sy...
The prediction model for maximum flyrock range is based on charge diameter as: Lmax ¼ 260 D2=3 Tb ¼ 0:1 Â D2=3 ð1Þ ð2Þ where Lmax is the maximum flyrock range (m), Tb is the size of the rock fragment (m), d is the diameter of explo- sive (inch). ...
X. Liu, S. Liu, and P. Tang, "Coal fragment size model in cutting process," Powder Technology, vol. 272, pp. 282-289, 2015.Liu X.H., Liu S.Y., Tang P.: Coal fragment size model in cutting process, In: Powder Technology, Vol. 272, 2015, pp.282-289....
In the mining industry, the use of continuous mining, longwall mining, and shortwall mining has been growing in relation to conventional mining. The former methods utilize high speed rotating bits to remove the coal from the working face, and this generates a wide range of fragment sizes. ...
As part of an effort to understand the mechanics of fine fragment formation in coal, which is important in studies of respirable dust due to mining, fracture toughness measurements and the strain energy density (SED) theory were applied to calculate the crush zone size under a cutting tool in...
Królowa Luiza Mine (Queen Luiza Mine): A fragment of the underground sections and sidewalk 510, forming part of the Wilhelm adit of the Królowa Luiza coal mine, are the oldest preserved coal workings in Poland. Główna Kluczowa Sztolnia Dziedziczna (Main Key Hereditary Adit): This is an...
n = n + 1. end while Postprocess the results and visualization. Sensors 2018, 18, 382 8 of 16 3.2. Flowchart of Cutting Pattern Method In order to identify the cutting pattern of the coal mining shearer effectively, the cutting sound signal of the shearer is collected and analyzed in ...
The samples were initially cut in a garden shredder followed by further homogenisation in a cutting mill (Retsch, Germany) using a 4-mm grate to a particle size of 0.5–1.0 mm. The samples were then oven dried at 70 ◦C for 72 h before processing. 2.2. Hydrothermal Carbonisation HTC ...