The transportation of raw coal is a very important link in the actual mining process of coal mine. And fully ensuring the safety of raw coal transportation plays a very important role in the smooth development of the whole mining operation. In the current coal mining enterprises for raw coal transport process, the occurrence of safety accidents is very frequent, so it is necessary to carry out in-depth analysis of the common faults of a large number of moving belt conveyor in the process of coal transport.
1. Common fault analysis of belt conveyor
1.1 Belt stop
Belt conveyor in the process of starting and running, often because the load is too large or the belt is too long and lead to the belt roller idling or belt skid caused by belt stop running fault, the occurrence of this fault will have a huge impact on the overall operation efficiency of the coal mine belt conveyor.
1.2 Belt deviation
Belt running deviation of coal mine belt conveyor is very common in the process of actual operation a failure form, the emergence of the belt running deviation of belt conveyor and the service life of the actual impact, severe cases may even lead to coal mining to stop production, but also can produce serious casualties accident, bring huge economic losses to the enterprise. The main reasons for the belt deviation are as follows: First of all, there are various problems in the belt conveyor itself, if the belt conveyor main drum and conformity drum axis error is larger; It is very easy to appear the phenomenon of belt deviation; Secondly, in the process of belt conveyor installation, the installation and construction system between different parts will be affected by a variety of factors and lead to deviation, such as roller and conveyor belt center is not vertical, wire rope high and low uneven condition, are very easy to lead to belt deviation fault; Again, in the process of underground cargo transportation or equipment maintenance, the attention of the operator is not focused and the cargo is placed seriously to one side, which is very easy to lead to the phenomenon of belt deviation.
1.3 Belt Failure
In the actual operation of the belt conveyor, if the belt tension is too large, the joint has not been effectively fixed, or the belt use time is too long, it is very easy to lead to conveyor belt failure.
1.4 Belt slip
In the actual operation of the belt conveyor, if the conveying belt leaves the roller part of the tension is insufficient, so that the initial tension of the belt itself is too small, in this case, it will lead to the belt skid fault. In addition, if there is too much dust in the tail of the belt conveyor, or the accumulation of a large amount of coal dust, in the process of equipment maintenance, maintenance and repair personnel did not clean up in time, it will lead to increased resistance of the equipment in the actual operation process, which is also very prone to belt skid fault. If the relative height of the equipment in the actual operation process to meet the actual work needs, will make the actual operation efficiency of the belt conveyor in a higher state, which will form a huge impact on the lower belt, leading to the deflection of goods on the belt conveyor phenomenon, and then cause the belt slip fault.
2. Analysis of common fault handling measures of coal mine belt conveyor
2.1 Belt deviation troubleshooting analysis
In the actual running process of belt conveyor deviation fault is very common, the relevant staff should timely fix the relevant key parts of the belt conveyor. And in the actual maintenance process, strictly in accordance with the belt conveyor maintenance sequence to carry out. First of all, we should strictly check the belt conveyor transmission part, and then strictly check the various parts along the belt conveyor and the actual transmission direction, and timely find that the belt parts of the deviation problem are corrected in time, so as to fully ensure the normal operation of the belt conveyor. If the belt conveyor in the middle part of the phenomenon of running off, the relevant staff must be timely for the actual position of the support rod timely adjustment, so as to achieve effective solution to the fault. The operator should observe the belt transportation and actual running condition in time to ensure that the belt deviation completely disappears. In the actual process of running off fault processing, maintenance personnel must fully ensure that the processing process will not affect the other parts of the belt conveyor, and in the actual process of adjusting the two sections of the wheel and shaft, in strict accordance with the way of moving to drive the other end. If the belt deviation appears in the position of the driving drum, it must be timely calibrated for the bearing base position of the drum.
Once the belt conveyor in the actual operation process of belt fracture fault, the relevant staff must be timely replacement of the belt to deal with. In addition, the broken belt can be reconnected to fully ensure the normal operation of the belt conveyor. If the belt fracture phenomenon is caused by too much tension, the relevant staff must be reasonable adjustment for the belt tension, to fully ensure that the belt tension can meet the actual transportation needs, and will not cause damage to the belt itself. In addition, the damaged belt joint should be removed in time and replaced, so as to fully ensure the normal operation of the belt conveyor. At the same time, can also be adjusted by adjusting the supporting series or in a reasonable position to install the corresponding anti-deviation protection device to achieve effective prevention of belt fracture fault, for some serious aging phenomenon of the belt should be replaced in time, in order to fully ensure the safe operation of the belt conveyor.
For belt tearing fault, the relevant staff must be timely repair for the funnel, so as to effectively avoid belt conveyor in the actual operation process due to stone falling from the damaged position caused by belt damage. In addition, the relevant staff can also set up the corresponding tear monitoring device on the belt, to achieve the effective prevention and treatment of the belt tear fault, so as to avoid the belt conveyor in the actual operation of the belt tear fault.
2.4 Trouble shooting measures for belt skid
In view of the belt skid fault, the relevant operators must further increase the initial tension of the device, at the same time, but also can not affect the normal operation of the situation, to minimize the load of the belt conveyor, in order to fully ensure the belt transport and achieve safe operation. When equipment appear belt creep phenomenon, homework can also make full use of heavy hammer to reasonable to add the belt tensioning device with moving, through to the tensioning stroke can be adjusted to further increase the tension, tension or make full use of the propeller hydraulic tensioning method can realize the belt conveyor of sliding.the efficiently. In addition, the relevant staff must be in view of the belt conveyor for timely maintenance, strict implementation of regular inspection for belt, belt in effectively solve problems and, in view of the serious aging belt for timely replacement, at the same time also can be equipped with corresponding skid protection device, or appropriate sensing device is installed, For the conveyor belt and the operation of the process of running speed information timely collection, through processing after the timely discovery of fault location and effective treatment, on this basis can fully ensure the belt conveyor to achieve normal operation.
In the process of production and mining of coal mining enterprises, belt conveyor is a very important production equipment, but it often appears various faults in the actual operation process, which brings serious influence to the production and mining of coal enterprises. So must be in the light of the faults of the belt conveyor for effective control, was able to fully guarantee the belt conveyor is in good condition, in addition, the relevant work personnel and in the light of the fault type of the belt conveyor, take reasonable and effective solutions, in order to ensure the conveyor as well as the realization of the safe operation, and promote to improve the economic benefits of the enterprises.