1、外文原文：Modeling and Simulation of the Underground Mining Transportation System（XU LEI）Abstract: The system simulation is a study hotspot in large underground mines system engineering field. In view to the fact that the underground transportation is a large and complex system, we set Datun horizontal t
2、ransportation coal mining system as the research object in Xuzhou district, discreting event simulation theory, a transportation system model for certain transportation parameters. Through adjusting some transportation parameters, confirming the best distribution, thus analyzing the transportation s
3、ystem efficiency, carrying on a scientific evaluation on the transportation capacity system. Keywords: underground mine; the system simulation; transportation system. 1 IntroductionThe system simulation is a new subject which is based on auxiliary system design and management decision-making. The ne
4、w technology has been widely used in mechanical manufacturing, material processing, transportation, military deployment, flight training, business services, computer, communication, mining engineering system analysis and design works. We use it to carry on reality system test, which can help us accu
5、rately evaluate the operation system performance. We can judge various advantages and disadvantages of running options without interfering with the actual system in the cases, making timely solution decisions. The large underground mining transportation system, as a mining arterie, is a large and co
6、mplex system. Using transportation system simulation technology to study them, we can obtain good economic benefits. Such as one Open-pit mine in U.S, analysing the broken system of forklift trucks under different numbers by SIMAN language simulation; One underground mine in South Africa, using simu
7、lation technology to do a feasibility simulation research on the gangue-rock shipment system of a new mine to determine the number of crusher and the capacity of adhesive tape machine, it leads to saving at least 4.4 million dollars investment. Because domestic underground mining level of automation
8、 transportation system isnt enough, the application of this technology has not come into widely used. This article takes Datun horizontal transportation coal mining system as the research object which is based on PLC control system, adopting discrete event systems simulation principle to build the s
9、ystem simulation model, so as to demonstrate its transportation capability. 2Profiles of mining transportation systemDatun coal gangue is mainly transferred by each sneak well and transportation flat, finally danger out by different levels. With the decline in the middle of production and limited su
10、rface, the transportation level is the lowest of the whole east, most of the mine gangue is transported through this level, and because of its unique geographical position, we hope it can afford a certain amount of transportation capacity of the other mines, and therefgangue we urgently needs to mak
11、e a scientific evaluation for the entire production system, so as to provide reliable basis for the optimization of transportation line. This level is shown in figure 1 below. Fig. 1. Transportation route schemes.This transportation system is a monorail transportation system, the gangue which is exp
12、loited from each stope enter 7, 8, 9, 10 (7 to 10) sneak wells group through their respective transportation level roadway or slipping to level 1360 meters through sneak wells group. Then transferring to fallway by the track transportation. The wasted gangue is uninstalled in the pit position, gangu
13、e continue to arrive via tracks mill. According to the scene material, wasted gangue rate is 25%. As can be seen from the graph, whether gangue of 7-10 sneak wells group or 25 to 27 sneak wells groups are required to pass through tracks 2, 3, 4 and rail track rails 5 (tracks 2-5). So, tracks 2-5 are
14、 the main bottleneck of the whole transportation system. 3 Model buildingFig. 2. Logic structure.The system is a discrete event system. According to the discrete event simulation principle: We can look the train as sports entity; Each pack, unloading track respectively means competition resources; W
15、heel-dreven and transfer station stand for queue waiting sites, queuing rules are first come first serve. Producing entities equal to the train number, after the entity is uninstalled, going back to the install mine dot through the original path, and then execute transportation tasks, so as to keep
16、on circulating in the system. Using events at fostering both propulsion simulation clock steps, simulating transportation system operation. According to actual condition, at the same time, transfer station can only stay a train. Every track (between two transfer stations) will only make a train operate. In order to make the whole line operate well, not occuring car accident, Waiting for the heavy truck(or empty car) of transfer station, only when it enter t
