Abstract

A semicontinuous process system consisting of a single‐bucket excavator, truck, crushing station, and belt conveyor is the main coal mining process system of a large‐scale hard coal open‐pit mine. Through analyzing the coal mining production process, the key issues of coal mining truck flow optimization are obtained. Statistical method of using triangular fuzzy numbers analyzes the key time parameters of coal mining truck flow. Taking one shift, the minimum expected value of number of trucks, as the objective function, the fuzzy expectation of the coal mining semicontinuous process system is established with the constraints of the truck flow continuity at the loading and unloading point, the production capacity of the electric shovel, the production capacity of the crushing station, coal quality, and coal mining production tasks. The truck flow planning model is solved using particle swarm intelligence algorithm. The simulation results show that the result of truck flow planning can effectively reduce truck number, truck dispatching number, transportation costs, and truck queuing. The fuzzy expected truck flow planning model established by the study is suitable for solving the problem of optimizing and matching the production capacity in the process which links electric shovel, truck, and crushing station. It can effectively improve the production efficiency of electric shovel mining, truck transportation, and crushing station.

Highlights

  • According to statistics, in 2018, there were about 450 openpit coal mines in China. e production scale of the largest open-pit coal mine was 35 million tons/year, and over 20 large-scale open-pit coal mines’ production was over 10 million tons/year. e total capacity of China’s surface coal mines is about 950 million tons/year, accounting for about 25% of the total capacity of coal mines

  • About 800 million tons of raw coal is transported through this process system every year. e coal mining semicontinuous process system is matched and coordinated by a single-bucket excavator, truck, crushing station, and belt conveyor to complete open-pit coal mining operations. e system is essentially a serial process, and the cooperation between the pieces of equipment will seriously affect the performance of the system, so it is important to study the optimization of coal mining truck flow in open-pit mines

  • For the time parameters of the total shovel loading time and the total unloading time of the truck, we count the fuzzy information, and the membership function takes a trigonometric function. erefore, the total shovel loading time and the total unloading time of the truck can be regarded as fuzzy variables, and the membership or credibility distribution can be obtained by the method of fuzzy statistics.Definition 1 e fuzzy number A belongs to the real number field R, and the membership function can be defined

Read more

Summary

Introduction

In 2018, there were about 450 openpit coal mines in China. e production scale of the largest open-pit coal mine was 35 million tons/year, and over 20 large-scale open-pit coal mines’ production was over 10 million tons/year. e total capacity of China’s surface coal mines is about 950 million tons/year, accounting for about 25% of the total capacity of coal mines. Most of the coal mining processes of medium- and large-scale open-pit coal mines use the semicontinuous process system with a single-bucket excavator, truck, semifixed crushing station, and belt conveyor. E specific process of this mining process system is as follows: a single-bucket excavator loads the coal in the stope to the truck to complete the mining and loading operation, and the truck transports coal to the designated semifixed crushing station according to the dispatch instruction to complete the transportation operation. About 800 million tons of raw coal is transported through this process system every year. E coal mining semicontinuous process system is matched and coordinated by a single-bucket excavator, truck, crushing station, and belt conveyor to complete open-pit coal mining operations. About 800 million tons of raw coal is transported through this process system every year. e coal mining semicontinuous process system is matched and coordinated by a single-bucket excavator, truck, crushing station, and belt conveyor to complete open-pit coal mining operations. e system is essentially a serial process, and the cooperation between the pieces of equipment will seriously affect the performance of the system, so it is important to study the optimization of coal mining truck flow in open-pit mines

The Truck Flow Problem of Coal Mining Operations
Key Parameters of Truck Flow Planning
Fuzzy Expected Traffic Flow Planning Model
Findings
Conclusion
Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.