Improvement of drum shearer coal loading performance

Xuan, Nguyen Van; Gabov, V. V.; Задков, Д. А.

doi:10.17580/em.2018.02.06

Cited by 8 publications

(7 citation statements)

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“…The contact strength is usually obtained by the experimental method, which is expressed by the ratio of the load Pi on the indenter of the special testing machine and the surface area S under the indenter. Due to the error, it needs to be measured and averaged multiple times [10].…”

Section: Coal and Rock Cutting Mechanics (1) Coal Rock Strengthmentioning

confidence: 99%

Nonlinear Vibration Characteristics Identification of Drum - Rocker System of Shearer Based on Artificial Intelligence

2022

AJCIS

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As the core component of coal interception and coal loading, the spiral drum of coal shearer directly affects the working efficiency of coal shearer and the quality of coal. In the past research on shearing force of shearer drum, there are many problems and deficiencies in research methods and theoretical analysis. Therefore, based on the actual production conditions and the original drum model parameters, a simulation model of shearer drum cutting coal wall is established to simulate the dynamic process of coal cutting, and the research on the nonlinear vibration performance of the shearer rocker system affects its stability. The key issue of the performance and service life is therefore important to study the nonlinear vibration characteristics of the rocker system. This paper mainly studies the nonlinear vibration characteristics of the rocker system. In this paper, based on ANSYS software, the model analysis of the rocker arm shell and the traction part shell is carried out. Harmonic response analysis was carried out on the housing of the traction part, and its response under sinusoidal excitation of different frequencies was obtained. The lateral vibration acceleration and swing angle acceleration of the shearer body are 0.0098 2 / s mm and 0.0074 2 s rad , respectively. The larger the average cutting impedance of coal rock, the greater the lateral acceleration of each part of the shearer under the oblique cutting condition, the greater the fluctuation, and the direction changes with time. The average cutting impedance of coal rock has a great influence on the front drum and front rocker of the shearer. The experimental results show that the study of nonlinear vibration characteristics provides a reference for the optimization of the shearer's structural strength and the improvement of its resistance to shock and vibration.

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Section: Coal and Rock Cutting Mechanics (1) Coal Rock Strengthmentioning

confidence: 99%

Nonlinear Vibration Characteristics Identification of Drum - Rocker System of Shearer Based on Artificial Intelligence

2022

AJCIS

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“…At present, there are two main mining methods of the thin coal seam: blasting mining and mechanical mining (Nguyen et al., 2018; Wang et al., 2011). Blasting mining refers to the mining of coal by means of drilling and blasting, this method has low efficiency and poor safety.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation on coal loading process of shearer drum based on discrete element method

Tian

Jing

Zhao

et al. 2021

Energy Exploration & Exploitation

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The drum is the working mechanism of the coal shearer, and the coal loading performance of the drum is very important for the efficient and safe production of coal mine. In order to study the coal loading performance of the shearer drum, a discrete element model of coupling the drum and coal wall was established by combining the results of the coal property determination and the discrete element method. The movement of coal particles and the mass distribution in different areas were obtained, and the coal particle velocity and coal loading rate were analyzed under the conditions of different helix angles, rotation speeds, traction speeds and cutting depths. The results show that with the increase of helix angle, the coal loading first increases and then decreases; with the increase of cutting depth and traction speed, the coal loading rate decreases; the increase of rotation speed can improve the coal loading performance of drum to a certain extent. The research results show that the discrete element numerical simulation can accurately reflect the coal loading process of the shearer drum, which provides a more convenient, fast and low-cost method for the structural design of shearer drum and the improvement of coal loading performance.

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“…It creates environmental issues in terms of land degradation, air and water pollution, etc. [3][4][5][6]. In addition to economic benefits, mining entails significant environmental impacts, including disruption to natural landscapes and ecosystems [7].…”

Section: Introductionmentioning

confidence: 99%

Backfill of a Mined-Out Gold Ore Deposit with the Cemented Rubber-Cord and Waste Rock Paste: Environmental Changes in Aqueous Media

Danilov¹,

Matveeva²,

Korelskiy³

et al. 2021

J. Ecol. Eng.

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Assessment of the dynamics of changes in the physical and chemical properties and morphological composition of the filling mixture as well as the identification of the elements capable of migrating into the environment is an important part of assessing the environmental efficiency of such an environmental measure during the filling of mined-out space of an ore deposit. During scientific research, the environmental safety mined-out space filling technology at the gold ore deposit by the mixture of rock waste, cement and crushed car tires was investigated. The authors carried out a set of laboratory studies and created a physical model of groundwater infiltration. Under laboratory conditions, this model allowed the experiment to evaluate the migration of elements and substances from the filling mixture into the environment to assess the risks of secondary pollution. The potential hazard of element migration from the backfill mixture into the environment was determined as a result of testing the backfill mixture on a bench with washing using the model solution that emits drainage water. During research, it was revealed that under the conditions of an ore deposit, the filling mixture components transformation would not lead to hazardous hydrochemical and hydrogeochemical areas or pollution stream formation.

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Improvement of drum shearer coal loading performance

Cited by 8 publications

References 0 publications

Nonlinear Vibration Characteristics Identification of Drum - Rocker System of Shearer Based on Artificial Intelligence

Nonlinear Vibration Characteristics Identification of Drum - Rocker System of Shearer Based on Artificial Intelligence

Numerical simulation on coal loading process of shearer drum based on discrete element method

Backfill of a Mined-Out Gold Ore Deposit with the Cemented Rubber-Cord and Waste Rock Paste: Environmental Changes in Aqueous Media

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