1, two 90,000 yuan grade electric SUV listed On March 28th, Chery Automobile's pure-electric compact SUV, the Tiggo 3xe, was officially launched. The Tiehu 3xe's new vehicle length and width were 4200/1760/1570mm, and the wheelbase was 2555mm. Its NEDC's integrated operating range can ......
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After the local site underground explosion or combustion occurs, the deposition of coal dust explosion were raised and spread rapidly. In order to break and control the explosion that has already occurred and prevent it from continuing to expand, it is necessary to adopt explosion-proof measures to ......
Why NB-IoT wireless smoke alarm can quickly replace the wired smoke, mainly for several reasons. One reason: wired smoke alarm needs wiring, wiring design, wiring workload, operation trouble, the installation location must be designed and installed according to the wiring, installation is not con ......
1 Introduction Coal mine production safety accident-prone, has been troubled by the development of coal mine enterprise security is a major problem. Over the years, due to the implementation of the planned economic system of state-owned coal mines, in order to achieve a smooth transition from the p ......
I. Safety technical measures for personnel to enter the coal side operation 1. Strictly implement the system of knocking and helping. When personnel enter the coal side to carry out work, they must arrange the operation of more than 2 people, and designate one person (experienced old worker) to mon ......
As long as there is a coal (rock) layer in a mine, gas is discovered, and the mine is a gas mine. Gas mines must be managed in accordance with mine gas levels. The mine gas rank is divided according to the relative gas emission of the mine, the absolute gas emission of the mine and the gas emission ......
I. Overview 9104 tape transport trough north roadway from opening, now boring 530 meters, is about to be affected by adjacent coal mining 9102 Mining Face, in order to ensure safety, especially the development of the following technical safety measures. Second, safety technical measures 1. After ......
Due to the long stoppage time of the 2201 working face, the pressure on the working face increases sharply, but the safety valve of the hydraulic support does not open. To prevent the damage of the bracket, this measure is specially formulated. The specific matters are as follows: I. Overview: The ......
In order to ensure the safe operation of the conveyor, the following safety technical measures should be taken: 1. The rotating part of the belt conveyor and the tensioning device should be equipped with a protective cover or railing. The passage that needs to span the tape should be installed with ......
About CBM Coalbed methane, commonly known as coal mine gas, is an unconventional natural gas that is mainly in the state of adsorption and is produced and stored in coal-bearing strata. Its composition is basically the same as that of conventional natural gas (methane content is more than 95%, calo ......