Coal spontaneous combustion discovered sooner, more easily extinguished. Therefore, understanding and mastering the initial signs of coal spontaneous combustion and timely identification and judgment is of great significance for fire prevention. The initial signs of spontaneous combustion of coal a

Mine fires are based on “prevention.” The general technical measures for preventing mine fires are as follows: non-combustible support materials are used. Wellhead rooms, derricks and wellhead buildings, inlet shafts, return shafts, flat rafts, downhole yards at major production levels,

I. Techniques for prevention and control of subsidence The prevention and control technology of subsidence damage can be considered from two aspects; (1) the control of mining subsidence, that is, through reasonable selection of mining methods and techniques, rational arrangement of mining face, ad

Gas explosion coal mine disaster is the most serious accidents, with a strong destructive, sudden, often causing heavy casualties and property losses, is the first major "killer" mine. Judging from the national situation (according to relevant statistics), 74% of the major accidents in whi

MKZ is Lincoln's luxury midsize sedan, which is currently imported into the domestic market for sales. China Netcom learned from the AQSIQ Defective Product Management Center that some MKZ's steering wheel fixing bolts have insufficient tightening torque, which causes the steering wheel to

In 2015, the State Council issued the "Made in China 2025", clearly mentioning the goals that need to be gradually realized in the next decade, and achieving its grand goals will inevitably circumvent the mining industry. At present, the informationization and intelligence of the mining i

Core Tip: On the eve of the Spring Festival, the Ministry of Finance and other four departments jointly issued a notice to adjust the subsidy policy for new energy vehicles and to encourage the use of high-performance power batteries. The change in policy has strengthened the role of market optimi

Coal mine fire is one of the top five mine disasters. In the event of a fire in the mine, the fire develops at a fast speed, the control is complicated, and the scope of the impact is relatively wide. It is easy to cause casualties and property losses, and even cause coal dust, gas explosion or coal

(1) Size and arrangement of grouting pipe: 1. Grouting pipe use specification: Φ20×3000 grouting pipe for over-excavation over 500mm, over-excavation less than 500mm and Φ20×2500 grouting pipe for bottom plate, grouting pipe row spacing is 2m×2m, error ±100mm, exposed length 10

According to statistical data, the overall import vehicle market: In April 2018, after the reduction of the tariff rate, the import vehicle manufacturers slowed the pace of import in order to avoid operating risks. The auto customs import volume was 85,000 units, a year-on-year decrease of 7.9%. .

According to China Voice "Yangguang News", during the APEC Leaders' Meeting in November, a number of car companies will provide services for the summit. The conference vehicles will be in place this week. The products are divided into hybrid vehicles and pure electric vehicles. There

During the daily use of the crusher , the instrument will be worn out and the service life will be shortened. However, daily maintenance and maintenance will reduce the wear of the machine. So how do you routinely maintain and maintain the crusher? Today, Xiaobian summarizes some of the daily mainte