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18
2019-12
Control Measures of Spontaneous Combustion Fire in Coal Mine Goaf-Yikuang Science and Technology
In the process of mining in fully mechanized working face, air leakage in goaf leads to spontaneous combustion of remaining coal and gangue in oxidation and self-heating state, especially in coal seam group mining mines. Before mining in lower coal seam, water is released from overlying goaf, and a large amount of water and gas replacement provides oxygen supply conditions to accelerate oxidation of residual coal. Roof goaf in lower coal seam caving, fissures in upper and lower coal seam goaf and lower coal seam goaf lead to increase air leakage channels, causing spontaneous combustion, this leads to low oxygen and CO overrun in the lower mining face, which can not be mined normally, especially in the goaf of each working face with strip-type arrangement without isolated coal pillar. Goaf fire has the following remarkable characteristics: ① fire hidden, it is difficult
2019-12-18
18
2019-12
Measures to Prevent Coal and Gas Outburst Accidents-Yiguang Science and Technology
1. It is strictly prohibited to use caving coal mining method, hydraulic coal mining method and informal coal mining method in outburst coal seam, and it is strictly prohibited to use pneumatic pick to drop coal in the mining face of outburst coal seam. 2. Within the influence range of concentrated stress in the same section of the same outburst coal seam, two working faces shall not be arranged for mining or tunneling. 3. When the roof and floor of the outburst coal seam are excavated into the rock roadway, the geological data must be verified regularly, and the construction dynamics and dangerous rock changes must be grasped in time to prevent the outburst coal seam from being penetrated by mistake. 4. Before blasting coal in the mining face with outstanding danger, all eye holes without charge shall be filled with incombustible materials, and the filling depth shall not be less than the blasting hole depth.
2019-12-18
18
2019-12
30 more miners killed! We will never know which comes first, tomorrow or the accident!
Recently, local officials in the Democratic Republic of the Congo (DRC) announced on the 15th that a gold mine in Haut-Uélé province in the northeast of the country recently collapsed, killing at least 30 people. Officials from Haut-Uélé province told the media on the same day that due to heavy rain, a local gold mine collapsed on the 13th, and a number of miners who were working underground were buried. As of the 15th, search and rescue personnel have found 30 bodies, and the number of victims may continue to rise. The mining industry in the Democratic Republic of the Congo (DRC) is the pillar of the national economy, and the eastern region is rich in minerals, but illegal mining has been repeatedly banned, leading to frequent mining accidents. The government has shut down a number of artisanal mining farms this year.
2019-12-18
18
2019-12
Silence! Five dead, 13 trapped! State-owned coal mine flooding accident latest progress...
Today, the reporter learned from the third press conference of the "12.14" flooding accident in the Cunninghamia lanceolata Coal Mine of Sichuan Coal Group that under the unified command of the headquarters, the drainage plan was optimized through the consultation of rescue experts. The 220 m3/h drainage equipment was replaced by 550 m3/h drainage equipment, which accelerated the drainage speed. The water level in the accident area dropped from 138.71m at 13:00 today to 134.08m at 16:00. At the same time, as of 16:00 today, a new person was found dead, the number of victims increased to 5, and the number of missing persons was 13. In order to speed up the work progress, in the original 11 rescue teams and fir trees.
2019-12-18
16
2019-12
Coal power is still irreplaceable in China
1 Preface China's coal power is currently in a very embarrassing situation. In terms of energy conservation, it is best to make coal and electricity cogeneration, cold, heat and electricity cogeneration, and the energy utilization rate can be increased to 80%; in terms of coal saving, it is best to build a single unit with a million kilowatts of ultra-supercritical units.
2019-12-16
16
2019-12
China News Service, November 28. The website of the State Coal Mine Safety Supervision Bureau today released the ''Notice of the State Coal Mine Safety Supervision Bureau on Carrying out Centralized Coal Mine Safety Rectification "(hereinafter referred to as the ''Notice''), and decided to start a three-month period from now on Centralized coal mine safety rectification. The "Notice" pointed out that the key contents of the centralized rectification of coal mine safety include over-capacity, over-strength and over-quota organization of production, over-issuance of production targets by superior companies to their coal mines, and over-assault and brute-force in some areas with better coal storage conditions. Over-layer cross-border mining and illegal mining of security coal pillars, with false drawings, false seals and other conceal the production of the operation site
2019-12-16
16
2019-12
At 14:30 on October 21, a transportation accident occurred in the underground mining face of Shanxi Jiexiu Dafosi Wangyuan Coal Industry Co., Ltd., and one person died;
2019-12-16
16
2019-12
A reporter from the Beijing News visited the scene and combed through the exclusively obtained archives and found that the coal mine involved in the incident has had a monthly record of gas overrun since April this year, and employees have been injured frequently. At 1526 hours on December 14, 2019, a water penetration accident occurred in the transportation Shimen at the boundary of N24 mining area in the Cunningwood Coal Mine of Sichuan Coal Group. A reporter from the Beijing News learned at a news briefing held on the morning of the 15th that a total of 347 people on duty entered the well. After the accident, 329 people came out of the well safely. As of 17:00 on the 15th, the accident killed 4 people and lost contact with 14 people. After the accident, including the Furong group company rescue team
2019-12-16
13
2019-12
History can never be forgotten! Don't forget history, we are self-improvement!
Today, 82 years ago, the Japanese invaders captured Nanjing, more than 40 days of bloody massacre, more than 300,000 compatriots were killed ...... December 13, the sixth Nanjing Massacre victims# National Memorial Day#, we pay homage in the name of the country, together to watch peace! Forwarding this microblog, the nickname will light up Zijin grass, don't forget history, we are self-improvement!# Memorial Day#
2019-12-13
