A county employee died when he was crushed between two heavy equipment compaction vehicles.

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2004 ◽  
Author(s):  
R. E. Miller ◽  
N. T. Lowe ◽  
R. Thompson
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2021 ◽  
Vol 11 (10) ◽  
pp. 4342
Author(s):  
Yeanjae Kim ◽  
Jieun Baek ◽  
Yosoon Choi

A smart helmet-based wearable personnel proximity warning system was developed to prevent collisions between equipment and pedestrians in mines. The smart helmet worn by pedestrians receives signals transmitted by Bluetooth beacons attached to heavy equipment, light vehicles, or dangerous zones, and provides visual LED warnings to the pedestrians and operators simultaneously. A performance test of the proposed system was conducted in an underground limestone mine. It was confirmed that as the transmission power of the Bluetooth beacon increased, the Bluetooth low energy (BLE) signal detection distance of the system also increased. The average BLE signal detection distance was at least 10 m, regardless of the facing angle between the smart helmet and Bluetooth beacon. The subjective workload for the smartphone-, smart glasses-, and smart helmet-based proximity warning system (PWS) was evaluated using the National Aeronautics and Space Administration task load index. All six workload parameters were the lowest when using the smart helmet-based PWS. The smart helmet-based PWS can provide visual proximity warning alerts to both the equipment operator and the pedestrian, and it can be expanded to provide worker health monitoring and hazard awareness functions by adding sensors to the Arduino board.


2021 ◽  
Author(s):  
Anne Fischer ◽  
Zhuoran Li ◽  
Stephan Kessler ◽  
Johannes Fottner

1988 ◽  
Author(s):  
Jack Bruss
Keyword(s):  

2016 ◽  
Vol 11 (1) ◽  
pp. 203 ◽  
Author(s):  
Dio Putera Hasian

Bureau of mining heavy equipment maintenance at PT. Semen Padang have task in maintenance mine heavy equipment with preventive maintenance although breakdown maintenance. Part inventory is needed to make this activity work properly. If stockout happened will have the impact to PT.Semen Padang mining and production activity. To solve this problem, minimum-maximum inventory control policy is used to give an optimum value of inventory mine heavy equipment. This research is focused in filter and lubricant inventory because they have high demand rate. Data consumption filter and lubricant from January until December 2010 is used in this research. The service level that used is 95%. The result is quantity optimum inventory mine heavy equipment at filter and lubricant with application part inventory of mine heavy equipment. Because it can keep stockout although excess inventory.Keywords: stockout, optimum, inventory


INFOMATEK ◽  
2017 ◽  
Vol 18 (2) ◽  
pp. 97
Author(s):  
Buki Tarigan

Abstrak: Bucket teeth adalah komponen attachment yang sering digunakan pada heavy equipment salah satunya yaitu bucket wheel excavator, yang fungsinya untuk material handling. Prinsip kerja bucket wheel excavator adalah continuous excavators, namun dalam pengoperasinnya bucket teeth sering terjadi kendala yang dapat mengganggu proses produksi. Salah satu kendala yang sering terjadi adalah keausan pada bucket teeth. Bucket teeth harus mempunyai ketangguhan dan kekuatan bahan yang tinggi, sehingga dapatmempengaruhi life time dari komponen tersebut dan mengurangi down time. Dalam penelitian ini akan dibahas mengenai karakterisasi material bucket teeth pada BWE (Bucket wheel excavator) dengan menggunakanmetoda pengamatan metalografi, pengujian komposisi kimia, dan pengujian kekerasan yang berguna untuk mengetahui harga kekerasan pada bucket teeth dengan, demikian dapat memberi informasi kepada industri lokal dan perusahaan yang menggunakan bucket teeth mengenai spesifikasi material yang cocok untuk pembuatan bucket teeth. Adapun hasil pengujian metalografi, analisa komposisi kimia bucket teeth adalah termasuk material baja paduan sedang yang mengandung silicon, mangan dan krom yang mempunyai sifat tangguh, tahan korosi dan tahan aus. Diliahat dari struktur mikro dan kekerasan mempunayai struktur martensit temper dan harga kekerasanya rata-rata 468 BHN. Dengan adanya porositas dan permukaan specimen yang kasar dapat diperkirakan bahwa proses pembuatan bucket teeth menggunakan proses pengecoran (casting), dan diikuti dengan pengerasan (hardening) dan temper


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