Roof sinking Generally speaking, the relative displacement of the top and bottom plates exposed from the coal wall to the edge of the goaf is relatively close. In S, sometimes for the sake of comparison, this index is often converted into the amount of ceiling for unit height and unit propulsion, that is, how many mm per meter of height per meter. The figure below shows the close-up curve of the top and bottom of the working face, 1 is the absolute sinking curve of the top plate; 2 is the relative moving amount (sinking) curve of the top plate; 3 is the lifting curve of the bottom plate. 2. Roof sinking speed Refers to the amount of displacement of the top and bottom plates per unit time, calculated in mm/h. 3. Deformation and damage of the pillar 4. Roof crushing It is often expressed as a percentage of the area of ​​the area in the area. 5. Local topping Refers to the partial collapse of the top plate of the working face. 6. The top surface of the working face is cut along the coal wall, or it is called a large area. It means that the working surface is cut by the top plate along the working surface, and the other is also the coal wall piece, the pillar is inserted into the bottom plate, and the bottom plate is lifted. Tungsten carbide welding rope is a type of welding filler material that is used for hardfacing applications. It is made by combining tungsten carbide particles with a binding material, such as nickel or cobalt, to create a rope-like form. Welding Rope,Ctc Sctc Welding Rope,Cast Tungsten Carbide Welding Rope,Spherical Tungsten Carbide Welding Rope Luoyang Golden Egret Geotools Co., Ltd , https://www.lyshieldcutters.com
Tungsten carbide is known for its exceptional hardness and wear resistance, making it ideal for applications where the welded surface needs to withstand extreme abrasion and impact. The welding rope is typically used in industries such as mining, oil and gas, construction, and agriculture.
When the tungsten carbide welding rope is heated during the welding process, the binding material melts and fuses the tungsten carbide particles to the base metal, creating a hard and durable surface. This helps to extend the lifespan of equipment and machinery by protecting it from wear and tear.
Tungsten carbide welding rope can be applied using various welding processes, including manual metal arc welding (MMA), gas tungsten arc welding (GTAW), and flux-cored arc welding (FCAW). The choice of welding process depends on the specific application and the equipment available.
Overall, tungsten carbide welding rope offers a cost-effective solution for protecting and repairing high-wear surfaces, making it a popular choice in industries where durability and longevity are essential.
What are the indicators of mine pressure manifestation?
In the actual production process, the working face often has the following series of mine pressure phenomena, and it is customary to use these phenomena as indicators to measure the degree of mine pressure.