From the excavation to the scrapping of the mining roadway, the process of redistribution of surrounding rock stress caused by mining will be experienced, and the deformation of surrounding rock will continue to grow and change. Taking the return face of the working face affected by the mining of adjacent sections as an example, the deformation of the surrounding rock has to go through five stages: (1) Roadway impacting stage (2) The impact of the tunneling phase (3) Mining impact stage (4) Mining impact stability stage (5) Secondary mining impact stage See Table 6-1 for the general rule of the ratio of the speed of the top and bottom of the roadway in each impact stage. Table 6-1 The law of the movement of the top and bottom plates in different mine pressure zones in the mining area Mine pressure zone The speed of the top and bottom plates in each belt is close to /mm/d Ratio of the amount of each belt I Tunneling Impact Zone II No mining impact zone The violent zone ranges from a few millimeters to tens of millimeters per day, and the stability period is generally <1 in most cases, 0.2 to 0.5, and sometimes to about 1. III mining affects the zone before impact zone III 1 IV mining affects the stability zone V secondary mining influence zone From a few millimeters to a dozen millimeters per day Generally 20 to 30, a few cases up to 40 to 60
Accelerator TMTM-80GE is a type of sulfur-based rubber accelerator designed to improve the curing and physical properties of rubber products. It is known for its high level of activity and dispersion, making it ideal for applications that require fast curing and improved performance. The accelerator is typically used in the production of a wide range of rubber products, including tires, hoses, gaskets, and seals. It is also designed with safety features to ensure the protection of workers and equipment. Overall, Accelerator TMTM-80GE is an important component in the production of high-quality rubber products.
Accelerator TMTM-80GE is known for its high level of activity and dispersion, allowing for fast curing and improved physical properties of rubber products. It is designed for use in a variety of rubber applications, including tires, hoses, gaskets, and seals. The accelerator is also known for its safety features, ensuring the protection of workers and equipment. Additionally, it is a sulfur-based compound, which is commonly used in the rubber industry. Overall, Accelerator TMTM-80GE is a reliable and effective component in the production of high-quality rubber products. TMTM Accelerator,TMTM Rubber Accelerator,Accelerator TMTM-80GE,TMTM-80GE F500,Pre-dispersed Rubber Accelerator TMTM-80 GuangDong DuBa New Material Technology Co.,LTD , https://www.gddubachem.com
After impact zone III 2
Most cases <1, sometimes up to 1~2
From ten to twenty millimeters per day, up to thirty millimeters
10 to 15%
50 to 60%
5 to 8%
20 to 25%