A new model to predict roadheader performance using rock mass properties

Yazdani–Chamzini, Abdolreza; Siamak, Haji Yakhchali

doi:10.1007/s12404-013-0109-4

Cited by 19 publications

(6 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different investigators have proposed several performance prediction equations for roadheaders (Gehring, 1989;Bilgin et al, 1990;Rostami et al, 1994;Copur et al, 1998;Thuro and Plinnin-ger, 1999;Göktan and Güneş, 2005;Tumac et al, 2007;Ocak and Bilgin, 2010;Ebrahimabadi et al, 2011;Abdolreza and Yakhchali, 2013;Kahraman and Kahraman, 2016;Kahraman et al, 2019). Using these models, net cutting rate (NCR) is calculated.…”

Section: Introductionmentioning

confidence: 99%

Evaluating machine utilization times for roadheaders used in coal mines: Regression and artificial neural network analyses

Kahraman,

Rostami,

Dibavar

2023

Bilimsel Madencilik Dergisi

View full text Add to dashboard Cite

Roadheaders are extensively utilized for tunnel heading rock engineering applications all over the world. To create a work plan and calculate costs, it is critical to forecast roadheader performance as precisely as possible. Machine utilization time (MUT) is required for the calculation of daily advance rate of roadheaders. This paper investigates the values of MUT for roadheaders used in underground coal mines. The performance measurements were conducted on fifty different locations for axial machines and thirty-nine different locations for transverse machines. MUT values vary from 15 % to 37.5 % with an average of 26.3 % for axial roadheaders, and vary from 6.9 % to 37.9 % with an average of 18.4 % for transvers roadheaders. The average MUT is 25.4% for all measurements. The percentage of average support time approximately equals to the average MUT. Multiple regression and artificial neural network models were also developed for estimating MUT. Concluding remark is that the determined MUT values and the derived estimation models for roadheaders will be very useful for coal miners.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaluating machine utilization times for roadheaders used in coal mines: Regression and artificial neural network analyses

Kahraman,

Rostami,

Dibavar

2023

Bilimsel Madencilik Dergisi

View full text Add to dashboard Cite

show abstract

“…A number of studies have proved the possibility of obtaining ultra-fine-grained structure by SPD methods [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Study of Surface Layer Hardening after Treatment Complex Tool

Mitrofanova

2020

SSP

View full text Add to dashboard Cite

The results of experimental studies of the thin surface layer of samples made of steel 45 after treatment with surface plastic deformation (SPD) multiradius roller (MR-roller) are presented. On the basis of the apparatus of the mechanics of technological inheritance, taking into account the effect of the solidified body, a model of the process according to the scheme of multiple loading-unloading of metal, taking into account the phenomenology of the SPD process and the properties of the material, is created. Distributions of parameters of the stress-strain state in the deformation centre are obtained, the parameters of roughness and microhardness of the surface layer are investigated.

show abstract

“…Abdolreza J.T estimated the effect of tungsten ball rolling (Ø20 mm) on the microstructure of the surface layer of stainless steel AISI 316L [5]. X-ray analysis and transmission electron microscopy revealed the presence of ultrafine and nanoscale equiaxial grains with an average size of 200 Nm and 70 Nm and random orientations.…”

Section: Introductionmentioning

confidence: 99%

The Study of Multiradius Roller Running Process

Krechetov

Mitrofanova

2019

MATEC Web Conf.

View full text Add to dashboard Cite

The results of theoretical and experimental studies of the surface of the sample of steel 45 after surface plastic deformation (SPD) with multi-radius roller (MR-roller) is shown. The goal of this study is to expand the technological capabilities of the method of SPD through the use of a new design of the deforming tool developed at the Department of Engineering Technology of KuzSTU. The advantage of the MR-roller (Patent RU № 2557377) over the traditional tool for SPD (single-radius roller) is the possibility of creating a large hydrostatic pressure in the deformation zone, without destroying the surface layer of the processed material. The research technique included finite element modeling (FEM), microhardness measurement, metallographic studies of the sample structure. As a result of the study, some regularities of the process of hardening by a multi-radius tool with high hydrostatic pressure and a large number of quasi-monotonic deformation sites were revealed. The results indicate a significant hardening without metal destruction and the formation of nanoscale grains, which allows to improve the properties of rolled products in the application of high operating loads.

show abstract

A new model to predict roadheader performance using rock mass properties

Cited by 19 publications

References 5 publications

Evaluating machine utilization times for roadheaders used in coal mines: Regression and artificial neural network analyses

Evaluating machine utilization times for roadheaders used in coal mines: Regression and artificial neural network analyses

Study of Surface Layer Hardening after Treatment Complex Tool

The Study of Multiradius Roller Running Process

Contact Info

Product

Resources

About