NOTICE:
1. The stability of the whole rock mucking loader operation.
The operation stability of rock mucking loader has a great influence on its working power and safety. Compared with the horizontal axis type roadheader, the vertical axis type rock loader needs to achieve the same stability, and the component demand is increased by about 20%. When the roadheader is working, it may roll over, roll back, rotate along the straight axis, track slip and other instability phenomena. Adding fuselage component can improve the stability of TBM, but on the one hand, it will add cost, on the other hand, it will make TBM simply sink in the wet and low-lying environment.
According to statistics, during the working process, 26% of the rock mucking loading machine stops due to the lack of stability in the spatial direction, and 20% of the machine stops due to the breakdown of the motor. The whole tunnel mucking machine stability of rock loader directly affects the normal work of other executive organizations, so it is of great significance to enhance the whole machine stability of the roadheader, improve the mechanical function of the roadheader, enhance its working efficiency, and reduce faults.
2. Star wheel loading organization action coordination.
Loading organization is one of the primary work organizations of rock mucking loader. Its function is to collect and rake the coal and rock broken by cutting organization to the central conveyor. The size of loading ability depends on the selection of loading organization parameters, which directly determines the production ability of the whole machine. Therefore, it is necessary to improve and perfect the loading organization of roadheader.
3. Inductive factors of cutting head and pick.
The pick is the key part of the roadheader, and its data and manufacturing technology will have a great impact on the function of the roadheader. With the development of the application scale of roadheader, the demand of pick hardness and fatigue strength is increasing. At present, most of the cutting teeth of domestic roadheader are made of cemented carbide, such as 35CrMnSiA, whose defect is brittleness.
Because of the complexity of the geological conditions of the working strata of the roadheader, the pick is required to have high hardness, outstanding impact resistance and wear resistance, and then to ensure that the roadheader has a safe working ability when cutting quartz rich rock. Not only the raw material of the pick is very important, but also the shape of the pick and the placement of the cutting head can not be ignored. Pick pick is widely used because of its excellent self sharpening and impact resistance. The placement method of cutting head directly affects the stability and working power of the whole rock mucking loading machine.
4. Power of the rock mucking loading machine.
At present, the power of rock mucking loading machine used in China is relatively small, while that of roadheader used in developed countries ranges from 200kW to 300kW, with the highest value close to 500kW. The power is too small to cut harder rock and improve working power. Therefore, China needs to strengthen the development of high-power rock loader. In order to show the function of roadheader better, it is necessary to reserve a certain amount of power. From the current development trend of rock loader, the high-power roadheader will inevitably become the main type of mine.
