| Belt conveyor is a kind of continuous conveying mechanical device which takes conveyor belt as traction and load-bearing component.It is the main conveyor of the main conveying system of each mining head and roadway in the mine.Because the coal mine roadway has the characteristics of narrow space,uneven floor,continuous advancing and moving of coal mining face,short service life of roadway and so on.With the improvement of coal mining mechanization and the acceleration of working face advancement,the operation quality of main transport equipment is an important link.Belt conveyor has the advantages of long transport distance,large transport capacity,small working resistance,easy installation,low power consumption and less wear and tear.With the abnormal change of mine geological conditions and the continuous improvement of mine mechanization,its shortcomings are also obvious.The main two points are as follows: 1.Inclined roadway has certain requirements for roadway inclination when it is transported upward.Once the inclination angle is greater than 18 degrees,coal(gangue)may slide down and cannot be pulled up.When the belt active drum stops rotating,the slope is large and the resistance is high.Small,coal(gangue)will slide on its own,unable to control goods,and the phenomenon of buried belt accumulation occurs;2.Belt conveyor generally has a long transport distance,only one operator left in the nose,can not find the abnormal stopping problem of belt in time.This paper mainly studies the monitoring problem and protection system of underground belt conveyor in coal mine,and analyzes the underground transportation device of coal mine.Belt conveyor is one of the widely used and relatively simple transportation device,and is an important equipment in current coal mining.In particular,modern large-scale mines are widely used in the face of mining,major transportation lanes,ground transportation and other production links.It has the advantages of large transport volume,complex working environment and long transport distance.So belt conveyor has important economic value in modern coal mine production.But the coal mine in the mining process,coal transportation,it also exists some problems,belt conveyor will happen some faults,exist the problems of the belt conveyor transport not only inefficient,serious when still can cause the belt running deviation,and the severe leak coal lead to mechanical and electrical accidents such as fault belt,burning motor,make the belt conveyor stoppage,coal mine normal circulation homework to bring huge negative impact and economic losses.According to this problem,relevant researchers studied corresponding detection system and protection control system,conducted wireless real-time monitoring of the transportation process of belt conveyor in underground coal mine,and protected it to ensure the safe operation of belt conveyor and ensure the working efficiency of underground mining. |
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