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23
2021-07
Summary of various coal mine (mine) accidents nationwide since 2021
1. At about 09:30 on January 6, 2021, a general vehicle injury accident occurred in Inner Mongolia Alxa League Ningfa Mining Co., Ltd., resulting in one death. 2. 17:30 on January 9, 2021, a roof accident occurred at the 5106 working face of Jeddah Coal Mine of Qianwei Sanzhong Jeddah Coal Industry Co., Ltd., Leshan City, Sichuan Province, causing a worker to be injured on the spot, and the injured were rescued by the hospital. died. 3. 21:40 on January 9, 2021, one roof accident occurred in Wangjiata Coal Mine of Inner Mongolia Xinneng Mining Co., Ltd., killing one person. 4. 10 January 2021 at 13:00
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2021-07
On July 6, 2021, one transportation accident occurred in Qipan well Coal Mine (East District) of Guoneng Mengxi Coal and chemical Co., Ltd., killing one person.
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2021-07
At about 3 o'clock on July 9, 2021, a side gang collapsed during the construction and support of the coal coil of Hancun Coal Mine of Xiayang Town Tianhushan Energy Industry Co., Ltd., Yongchun County, causing a miner to be crushed. The injured were rescued and sent to hospital by the on-site personnel, but the injured died due to ineffective rescue.
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On July 15, 2021, a flooding accident occurred in Haojialiang Coal Mine in Yulin, Shaanxi Province.
CCTV reporter Wu Chengxuan learned from Yulin City, Shaanxi Province that at 15:00 on July 15, a flooding accident occurred in the Haojialiang Coal Mine in Yuyang District, Yulin City, and some people were trapped. The local area is currently undergoing emergency rescue. [National Mine Safety Supervision Bureau] On July 15, 2021, a roof water and sand penetration accident occurred in the fully mechanized working face of Huarui Haojialiang Mining Co., Ltd., Yuyang District, Yulin City, Shaanxi Province, causing 5 people to be trapped and are currently under intense rescue. According to preliminary understanding, the mine is a local state-owned holding enterprise with a production capacity of 1.2 million tons/year. The cause of the accident is subject to further investigation. All mining enterprises should draw lessons from the accident, draw inferences from one another, and be serious.
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2021-07
Large hole groove drill pipe gas drainage drill pipe beneficial mine technology
In view of the drilling problems such as gas concentration exceeding the limit, hole collapse in soft coal seam and mines that need to improve gas drainage efficiency, the research and development team has conducted several experiments. The research and development need not be limited to small-sized gas drainage screen pipes such as 32mm and 36mm. The inner diameter of large hole drill pipe reaches 64mm, and 60mm gas drainage screen pipe can be used. The gas drainage screen pipe uses high density polyethylene, high toughness and extrusion resistance, thus improving gas drainage efficiency, it can reduce the cost of operation for you and improve the overall work efficiency.
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2021-07
Large hole drill pipe gas drainage drill pipe beneficial mine technology
Configuration of integrated construction scheme for large hole drill pipe gas drainage drill pipe drilling and drainage: product name, diameter, unit quantity remarks large hole groove drill pipe Φ89mm root/meter 200 diamond open closed drill Φ120mm only 2 gas drainage screen Φ60mm 200 screen suspension Φ120mm only 2 rear water tail Φ89mm only 2 mine dust collector set 1 this scheme can be applied to existing hydraulic crawler drilling rigs of customers without additional purchase, air (water) cooling and dust reduction shall be adopted, and dust collection by drilling and pipe laying shall be carried out simultaneously. Operating instructions: 1. Diamond open and close drill bit and Chase
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2021-07
Gas pumping amplification through hole drill pipe beneficial mining technology grooving drill pipe
Large hole drill pipe
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2021-07
In order to ensure the drilling of drilling pipe with large hole groove and avoid drilling accidents caused by rock burst, drilling holding and hole collapse deformation, it is strictly forbidden to stop the drilling pipe for a long time when it is in the hole. All materials shall be prepared and placed at the drilling rig site to avoid sticking accidents caused by long waiting time. 2. When the drill pipe with large hole groove is withdrawn, it should be ensured that the withdrawal is not more than three drill pipes to reverse the drill for 1-3 minutes to ensure the hole formation and smooth withdrawal of the drill pipe. 3. When the drill pipe is used repeatedly, it should be cleaned and maintained. Use a brush to evenly apply the special thread grease for geological drill pipes distributed by our company, which can effectively avoid thread damage and thread seizure.
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2021-07
Walking into the Revolutionary Holy Land to Revisit the Red Classic Beneficiary Science and Technology to Warmly Celebrate the 100 Anniversary of the Founding of the Communist Party of China
2021-07-19
