Investigation and Application of Pressure Relief Scope of Driving Roadway along Goaf in Wu No.8 Coal Seam of Pingdingshan No.1 Coal Mine  

作　　者：LIYongming 

机构地区：[1]OutburstPreventionDepartmentofNo.1CoalMineofPingCoalCo.,Ltd.,PingdingshanHe’nan467000,China

出　　处：《外文科技期刊数据库(文摘版)工程技术》2022年第2期198-203,共6页

摘　　要：China is the country most seriously affected by coal and gas outburst accidents, which not only has the largest number of outburst mines, but also has a large number of outburst times and intensity. China's annual total number of outburst and average intensity of outburst are far higher than the average level of major coal-producing countries in the world. In order to prevent coal and gas outburst accidents, China actively adopts coal mine outburst prevention measures, but the coal mine outburst prevention cost in China is as high as 50-60 yuan /t, which brings great economic pressure to coal mines. During coal seam mining and roadway excavation, on the one hand, when the mining work destroys or disturbs the original gas balance state in the stratum, the high gas in the coal seam will desorb and drift to the space with lower air pressure, and enter the goaf;On the other hand, mining causes the stress redistribution of surrounding rock in stope and changes the structure of coal and rock mass, and then changes the accumulation mode and migration form of gas in coal and rock mass, forming a certain width of outburst elimination area. In order to reduce the cost of outburst prevention and make rational use of outburst elimination belt, many coal and gas outburst mines in China adopt gob-side entry driving. However, the protection effect and scope of mined-out areas to surrounding solid coal are still unclear, and the Detailed Rules for Prevention and Control of Coal and Gas Outburst requires that mining activities in coal seams must take measures to eliminate outburst danger. Therefore, it is urgent to scientifically investigate and study the scope of pressure relief protection in solid coal along the gob side, so as to provide scientific basis and technical support for driving along the gob side, improve the utilization rate of resources, ensure safety in production, and have good economic and social benefits.

关 键 词：driving along goaf gas control eliminate outburst pressure relief protection range 

分 类 号：TB[一般工业技术]