首采层开采对底板煤层影响规律分析

Analysis of influence of mining of first mining layer on floor of coal seam

为了分析首采层开采对底板煤层的影响规律,采用理论分析,分析了首采层开采对煤层破坏范围,研究了首采层开采对煤层工作面掘进和回采的影响,然后钻孔验证了1901运输巷反掘联络巷26.3 m打钻地质成果。研究得出:首采层工作面回采对下部9号煤层工作面产生影响为走向方向上内错19.8 m,倾向方向上内错8.42 m;首采层工作面回采对下部7号煤层影响范围为工作面范围内走向方向上内错9.42 m,倾向方向上内错3.93 m。研究为今后底板煤层的设计工作提出理论基础。

In order to clearly analyze the influence law of the first mining face on the coal seam,the theoretical analysis is used to analyze the damage extent of the first mining face to the coal seam,and the influence of the first mining mining on the coal mining face mining and mining is studied,then boreholes are drilled to verify the geological results of 26.3 m drilling in the back-excavation connection roadway of 1901 transport roadway.It is concluded that the influence of the first mining face on the lower No.9 coal seam is 19.8 m in strike direction and 8.42 m in inclination direction;the influence range of the first mining face on the lower No.7 coal seam is 9.42 m in strike direction and 3.93 m in inclination direction.The research provides a theoretical basis for the future design of floor coal seam.