Study on pick arrangement of shearer drum based on load fluctuation

Du, Chenglie; Liu, Songyong; Cui, Xinxia; Li, Ti-jian

doi:10.1016/s1006-1266(08)60065-6

Cited by 22 publications

(10 citation statements)

References 2 publications

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“…The adjustment amounts for the drum rotating speed and hauling speed are decided by the electromechanical characteristic of the cutting transmission system and the drum load characteristic. The drum load is influenced by both the drum rotating speed and the hauling speed [18,23,24]. The coordination control of the drum rotating speed and hauling speed will be investigated in further study.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Electromechanical dynamic analysis for the cutting transmission system of the unmanned long-wall shearer under variable speed process

Liu¹,

Qin²,

Liao³

2017

J. vibroeng.

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The drum shearer is one of the main equipments of the long-wall mining system. A typical condition to adjust the hauling and drum speeds is when the drum load exceeds the allowable value due to the hardness increase of the coal seam. Two schemes are utilized in this condition herein: (1) increasing the drum speed directly and maintaining the hauling speed; (2) decreasing the hauling speed firstly, then increasing the drum speed, finally increasing the hauling speed to the original value. The electromechanical dynamic model is firstly constructed for the Cutting Transmission System, and then the electromechanical dynamic analysis is conducted with both schemes, discovering that: the first scheme is quicker but may bring instability; the second is stable but slower; the resonance in frequencies obtained in different meshing conditions can be excited at the same time. At last, some advices are given for the development of the speed control strategies and mechanical design of the unmanned long-wall shearer.

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Section: Discussionmentioning

confidence: 99%

“…To simplify the calculation, the mean load is used to reflect the trend of the realistic drum load. This simplification can be found in a lot of literature [20][21][22][23], in which the cutting forces are usually the mean cutting force.…”

Section: Calculation Of the Mean Drum Loadmentioning

confidence: 99%

Electromechanical dynamic analysis for the cutting transmission system of the unmanned long-wall shearer under variable speed process

Liu¹,

Qin²,

Liao³

2017

J. vibroeng.

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“…Consequently, drum width of the shearer is found to be equal to 0.8 m on the basis of the low strength of C1 coal and drum diameter of 1.5 m. Du et al (2008) presented a mathematical relation between pick arrangements and drum fluctuation loads, drum rotary speeds and haulage speeds according to coal cutting theory. Pick arrangements and number of loader vanes influence drum rotary and haulage speed (Du et al, 2008).…”

Section: Drum Structure Parameters or Dimensionsmentioning

confidence: 99%

Selection of a Practicable Shearer Loader Based on Mechanical Properties of Coal for Parvadeh 1 Mine / Wybór wrębiarko-ładowarki w oparciu o właściwości mechaniczne węgla w kopalni parvadeh 1

Bakhtavar¹,

Shahriar²

2013

Archives of Mining Sciences

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Obtaining the maximum productivity with minimum energy consumption in coaling faces, directly depends on selection of the suitable shearer loader machine with the most effective and fitness picks for it and also their arrangement on cutter head. In order to select appropriate shearer loader machine, some in-situ tests have been carried out on C1 coal seam of Parvadeh1 long wall mine located in east of Iran. Studying of the mechanical properties of C1 coal seam demonstrates an extremely low strength of coal. Thus, it was concluded that a kind of two drums shearer (model EL600) with the conical picks can be effectively worked.Keywords: Shearer loader, mechanical properties, C1 coal seam, long wall, Parvadeh1Zapewnienie maksymalnej wydajności pracy w rejonie przodka połączonego z minimalnym zużyciem energii związane jest z wyborem odpowiedniego rodzaju urządzenia (wrębiarko-ładowarki), zapewniającego optymalną ilość i układ noży wrębowych. W celu wyboru optymalnej maszyny urabiającej, przeprowadzono badania in situ w złożu węgla C1 w kopalni Parvadeh 1 we wschodnim Iranie, gdzie wydobycie prowadzi się metodą ścianową. Badanie właściwości mechanicznych węgla C1 wykazało, że jest to węgiel o niskich parametrach wytrzymałościowych. Stwierdzono, że do urabiania tego typu węgla optymalnym rozwiązaniem będzie zastosowanie dwóch wrębiarek bębnowych (model EL600) wyposażonych w stożkowe noże wrębowe.Słowa kluczowe: wrębiarko-ładowarka, właściwości mechaniczne, pokład węgla C1, wydobycie ścia-nowe, Parvadeh 1

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“…Owing to the short development time of a bolter miner (Vierhaus and Rainer, 2002;Leeming et al, 2001), there have been few reports on its pick layout of a cutting head thus far, however, many scholars have conducted in-depth studies on other helical drums used in cutting equipment. For example, the cutting torque, cutting force, and load fluctuation coefficient have been applied as indexes, and the best pick layout scheme of a shearer was selected under different working conditions (Zhao and He, 2011;Li et al, 2014;Du et al, 2009). Based on an analysis of the vertical vibration characteristics of a continuous miner (Li et al, 2010) Qiao, Xia, Zaizheng Liu, Jinshu Liu, Ning and Wang, Journal of Advanced Mechanical Design, Systems, and Manufacturing, Vol.11, No.5 (2017) the drum load can effectively reduce the amount of vibration.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of bolter miner cutting head by using multicriteria decision-making approaches

Qiao

Xia

Liu

et al. 2017

JAMDSM

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A bolter miner is a new type of mining machinery with cutting and anchoring functions. Owing to its structural diversity, the cutting head performance of a bolter miner varies. However, there is still no effective method to evaluate the cutting head performance. Based on multi-aspect factors influencing the cutting head performance, the main factors such as the load fluctuation coefficient, mean torque, and specific energy were taken into account. Combined with the characteristics of multi-criteria decision-making approaches and the superiority of game theory in calculating the weight of the cutting performance indexes, an evaluation method based on the game-theory-extenics model is proposed. In addition, by combining the geological conditions of a particular coalmine, three pick layout schemes for the cutting head are compared, the final one of which was chosen through a performance evaluation. The results were successfully applied to the first shield bolter miner in China, and good results were obtained for engineering application. Keywords IntroductionThe traditional technology for coal lane tunneling is to cut in front using a cutting equipment and anchor at the back using a roof-bolter. The advancing speed of a cutting equipment is relatively quick, but the anchor work of a roof-bolter takes up too much time, leading to a serious imbalance in the excavation time. A bolter miner is a new type of mining machinery with cutting and anchoring functions, and can make the excavation and support stages progress synchronously, thereby improving the imbalance of the coal lane tunneling. The break up of coal-rock is completed using a front swingable cutting head. And the quality of its design directly affects the reliability, economy, and rapidity of the work being conducted. A cutting head is complex in structure and has a wide range of pick layouts, which have different geological adaptabilities. At the same time, how to select a cutting head with the best performance for the different working conditions has been widely studied by scholars both domestically and abroad Kang et al., 2016;Zhang et al., 2016).Differing from traditional cutting equipment, like a shearer or a roadheader, a bolter miner cutting head has no helical vane. And its difference in structure leads to a significant difference in mechanical properties between the cutting head and the helical drum (Ma, 2017;Gao et al., 2012). Owing to the short development time of a bolter miner (Vierhaus and Rainer, 2002;Leeming et al., 2001), there have been few reports on its pick layout of a cutting head thus far, however, many scholars have conducted in-depth studies on other helical drums used in cutting equipment. For example, the cutting torque, cutting force, and load fluctuation coefficient have been applied as indexes, and the best pick layout scheme of a shearer was selected under different working conditions (Zhao and He, 2011;Li et al., 2014;Du et al., 2009). Based on an analysis of the vertical vibration characteristics of a continuous miner (...

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Study on pick arrangement of shearer drum based on load fluctuation

Cited by 22 publications

References 2 publications

Electromechanical dynamic analysis for the cutting transmission system of the unmanned long-wall shearer under variable speed process

Electromechanical dynamic analysis for the cutting transmission system of the unmanned long-wall shearer under variable speed process

Selection of a Practicable Shearer Loader Based on Mechanical Properties of Coal for Parvadeh 1 Mine / Wybór wrębiarko-ładowarki w oparciu o właściwości mechaniczne węgla w kopalni parvadeh 1

Performance evaluation of bolter miner cutting head by using multicriteria decision-making approaches

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