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27
2021-09
Diagnosis of Stud Welding Difficult and Miscellaneous Disorders
Welding experts combined with 40 years of stud welding experience, put forward detailed solutions to some stud welding intractable diseases, and solve the stud welding production problem in your production! 1. For this welding position, due to gravity, the dissolved metal tends to flow to the lower side of the bolt during welding, resulting in uneven weld angle formation. The larger the bolt diameter, the greater the impact. Generally speaking, for this reason, vertical welding of bolts with a diameter of more than 10mm is not recommended. To obtain a satisfactory fillet forming basic requirements set the shortest welding time. A vertical weld will reduce the maximum size of the weld bolt for a given power source. must bear in mind
2021-09-27
27
2021-09
Coal Mine Gas and Coalbed Methane
Coal mine gas and coalbed methane coal mine gas has many hazards, the current management of coal mine gas is mainly through the extraction technology to control. In view of the general low permeability coal seam conditions in China, it is usually through the mining of protective layer, hydraulic fracturing, hydraulic cutting, hydraulic punching, controlled pre-splitting blasting, intensive drilling, gas phase fracturing and other technologies to increase permeability first, and then carry out coalbed methane extraction to control gas disasters. So what is the difference between the two concepts of coal mine gas and coalbed methane? Take a look at how the current standards define the two. 1. Coal mine gas (1) According to the National Energy Administration's "Eleventh Five-Year Plan for the Development and Utilization of Coalbed Methane (Coal Mine Gas)"
2021-09-27
27
2021-09
The new sharp tool of intelligent mine drilling is coming.
Huangling Mining No.1 Coal Mine: Intelligent Mine Drilling New Leg Comes
2021-09-27
27
2021-09
The industrial revolution has brought about earth-shaking changes in human life. The production of various machines makes us no longer rely on the forces of nature, but we also know that energy will not appear out of thin air, nor will it disappear in vain, but will transform its own form of expression. This is the law of conservation of energy. So the legendary "perpetual motion machine" does not exist, and our machinery also needs to consume energy to run. As a result, energy is becoming more and more important to human beings, and people even start wars in order to compete for energy. Today, our cities still rely on a variety of energy to run, people have been looking for the world's existence of energy, and now make
2021-09-27
27
2021-09
China Railway 25 engineering bureau strength ranking!
After decades of development, today's 25 engineering bureaus have already grown into strong enterprises in the construction of enterprises. However, the so-called strong is more powerful. Which of the 25 engineering bureaus is better is also a question that lingers in everyone's mind. Today we will find out. Objectively speaking, there are many factors to evaluate the strength of an enterprise, but this does not prevent us from analyzing it from a certain point. This paper intends to comprehensively evaluate these 25 engineering bureaus from the perspective of net profit, supplemented by factors such as the amount of newly signed contracts and operating income, and divide these 25 into four echelons, the specific ranking is as follows: the first echelon of China Railway Fourth Bureau
2021-09-27
21
2021-04
At 15:35 on March 27, 2021, a transportation accident occurred in the east wing track alley of Hulunbuir Husheng Mining Co., Ltd., Inner Mongolia, resulting in one death and one minor injury.
2021-04-21
21
2021-04
Notice of Shanxi Provincial Emergency Management Department Shanxi Provincial Local Coal Mine Safety Supervision and Administration Bureau on Ordering Shanxi Jindi Coal Coke Co., Ltd. Chiyu Coal Mine to Stop Production for Rectification Jin Emergency Letter [2021] No. 51 Luliang Emergency Management Bureau (Local Coal Mine Safety Supervision and Administration Bureau): On April 6, 2021, a safety accident occurred in Chiyu Coal Mine of Shanxi Jindi Coal Coke Co., Ltd. According to the "Notice of the General Office of the People's Government of Shanxi Province on Printing and Distributing the Provisions on Further Strengthening the Work of Coal Mine Safety" (Jin Zheng Ban Fa [2012] No. 34), the following handling decisions are made: The 1. ordered Shanxi Jindi Coal Coke Co., Ltd. Chiyu Coal
2021-04-21
21
2021-04
On March 31, 2021, an object strike accident occurred in the Peigou Coal Mine of Zhengzhou Coal Industry (Group) Yanghe Coal Industry Co., Ltd., killing one person.
2021-04-21
21
2021-04
Guiyang, April 13 (Reporter Li Wei) Jinsha County, Bijie City, Guizhou Province issued a notice on the 13th, saying that eight people were killed and one injured in the coal and gas outburst accident at Dongfeng Coal Mine in Jinsha County. At around 8:50 on April 9, a coal and gas outburst accident occurred in the Dongfeng Coal Mine in Jinsha County. After full rescue efforts, as of 15:27 on April 13, the rescue work was completed. At present, the wounded treatment, aftercare and accident investigation work is carried out in an orderly manner.
2021-04-21
21
2021-04
21 people trapped in a coal mine flooding accident in Xinjiang
The reporter learned from the emergency management department of the Xinjiang Uygur Autonomous Region that at about 18:10 on April 10, the Fengyuan Coal Mine in Quegou Town, Hutubi County, Changji Hui Autonomous Prefecture, Xinjiang, suffered a sudden flooding accident during the process of technical transformation, resulting in underground power outages and communication interruptions. According to preliminary understanding, 29 people were on duty underground at the time of the accident. So far, 8 people have been safely lifted into the well and 21 people have been trapped.
2021-04-21
