Introduction
Coal pick is one of the vulnerable parts in coal mining and roadway excavation machinery, and it is the main tool for coal crushing. Durability and service life of other related components.
Coal picks are divided into two types: knife-shaped picks and pick-shaped picks. The shank of the pick is cylindrical, and is fixed on the tooth seat with a spring ring, which is very convenient for disassembly and assembly. The structure is simple, it can be clicked to plan coal, the cutting depth is large,
Details
Introduction of coal pick
Coal pick is one of the vulnerable parts in coal mining and roadway excavation machinery, and it is the main tool for coal crushing. Durability and service life of other related components.
Coal picks are divided into two types: knife-shaped picks and pick-shaped picks. The shank of the pick is cylindrical, and is fixed on the tooth seat with a spring ring, which is very convenient for disassembly and assembly. The structure is simple, it can be clicked to plan coal, the cutting depth is large, it can be automatically sharpened during operation, the tooth head is always kept sharp, and the load of the shearer is relatively stable.
At present, coal mining enterprises mainly use pick-type picks, which can be divided into two categories: coal-mining picks and rock-drilling picks. The cutting and crushing process of coal and rock is the main process of coal mining work. According to the mechanical properties, the cutting and crushing process can be roughly divided into four stages: deformation stage, crack stage, compaction and nucleation stage, crack propagation and cracking stage. In each cycle, the four processes are completed instantaneously. Dividing the four processes according to their characteristics can also be simplified into two stages.
The first stage is the energy storage stage, elastic and plastic deformation occurs, a crack is formed and a compacted core is formed, which is a fracture in the form of a crack;
The second stage is the cracking stage. On the basis of one stage, the Hertzian cracks around the cone hole expand and collapse along the bedding and joint weak surfaces of the coal rock mass under the action of the cantilever beam loading system. broken form. The key task of coal mining industry is to mine coal resources, which not only facilitates our life, but also ensures sufficient resource supply in daily life. The development of coal mining industry is closely related to machinery, which directly affects the quality and efficiency of coal mining.
Today, let’s talk about the classification of coal mining accessories – coal picks. According to the different machinery used, coal picks can be divided into shearer picks, roadheader picks, rotary drilling rig picks, etc. Different picks have different functions.
One: Coal mining pick shearer The shearer is designed according to the coal mining machinery, the high strength hardness and wear resistance enable the shearer shearer to cut the harder ore, speed up the mining speed and improve the work efficiency .
Two: Roadheader coal pick Roadheader coal pick is similar to a shearer pick and has the same mining effect, but cuts harder rock. Used in conjunction with roadheaders, it is suitable for roadway excavation, and its strength is higher than that of shearers. The design of this part is similar to the shearer, but its design shape is different. It mainly has a brocade and a pickaxe, so it can cut better.
Three types: rotary drilling rig coal pick rotary excavator pick is used for rotary drilling rigs of various pile drivers. Its design is different from shearer and roadheader picks, and its function is also different. Mainly used for deep mining. Since some coal mines are not on the surface, it is necessary to use a rotary drilling rig for mining, so as to effectively mine and improve the overall work efficiency.
