Jinggong coal mining involves a complex process that transitions from surface operations to underground extraction. As an underground operation, it faces more challenging natural conditions. The main hazards in coal mining include five major disasters: gas, coal dust, roof collapse, fire, and water ingress. 1. Mine Ventilation. Since coal mining takes place underground, the air from the surface is often contaminated with harmful gases and dust as it flows through the working areas. Additionally, heat from geothermal activity, human labor, and machinery causes the temperature and humidity of the underground air to rise significantly. This creates uncomfortable and potentially dangerous working conditions, making mine ventilation essential for maintaining safe and healthy environments. 2. Gas and Dust Hazards. During the coal extraction process, gas and dust are released. Under certain conditions, these substances can lead to explosions, causing serious injuries or even fatalities and significant property damage. Moreover, coal dust can cause long-term health issues such as pneumoconiosis (coal workers' lung disease) and silicosis, which severely affect miners' quality of life. 3. Roof Collapse Disasters. In underground mining, the weight of the overlying rock layers can cause the roof to collapse if not properly managed. Poor maintenance or improper support systems can result in dangerous roof falls, posing a serious threat to miners' safety. 4. Mine Fires. Fire is another critical hazard in coal mining. A mine fire can lead to the loss of valuable coal resources, disrupt mining operations, and increase the risk of gas and coal dust explosions, thereby worsening the overall disaster situation. 5. Water Ingress. During both the construction and operation of a mine, water from surface sources or groundwater can enter the mine through various pathways. To prevent this, mines implement drainage and water control measures. However, if water inflow exceeds the capacity of the drainage system or if old water-filled voids or karst water are encountered during mining, it can lead to flooding, endangering both personnel and equipment. This website solemnly declares: This article is a reprint from online media, and the views expressed do not necessarily reflect those of this site. If any news articles or comments infringe on your legal rights, please contact us immediately, and we will address the issue promptly.
Diamond grinding head: A kind of stone material, ceramic materials and other non-metallic materials of grinding tools, especially involving a with diamond alloy grinding tools for grinding body, it includes substrate and a mill body, in which several mill body clearance to fixed to the substrate, the grinding surface of the grinding head grinding body also set a clearance, among them, the substrate is best by a certain toughness of adhesive materials, The abrasive body is preferably made of diamond alloy material. The utility model has the characteristics of high grinding performance, simple manufacture, low cost, high grinding quality and can be applied to large-scale grinding
Through the processing of various workpiece, to achieve grinding, grinding, polishing effect; According to the use, mainly divided into the following types of grinding head:
1.grinding class: mainly installed in the grinding machine grinding head, the workpiece for grinding, grinding, grinding, processing can be divided into rough grinding and fine grinding.
2.grinding class: generally used for grinding the burr of the workpiece, or the workpiece surface precision is not high processing. Use grinding machine, electric, pneumatic and other tools to high-speed operation to achieve the effect of grinding.
3.polishing class: specially for surface finish (roughness) processing and use of higher requirements, is the need for separate processing process.
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