近距离上行开采工作面受下部工作面影响区域研究

Research on the Influence Area of Lower Mining Face to Close Distance Upward Mining Face

以翟镇煤矿6202E工作面上行开采为工程研究背景,通过理论分析和现场矿压观测得到了上部工作面受下部工作面开采的影响区域,研究表明,越靠近采空区中部,岩层破断程度越大,而在采空区边界,由于煤柱支撑作用,岩层破断程度较低;当6202E工作面的运输巷布置于6403E运输巷以外20m煤柱区时,上部边界内影响区为17. 1m,运输巷边界外影响区为17m,可有效地避免应力影响;轨道巷布置于6403E轨道巷采空区以里2m,内影响区为15. 3m,外影响区为18. 4m,可采用架棚支护,控制围岩的移近量和移近速度。

We take the upward mining of the 6202E working face in Zhaizhen Coal Mine as the engineering background,through theoretical analysis and on-site pressure observation,the influence area and degree of the upper working face on the mining of the lower working face are obtained. The research shows that,the closer to the middle of the goaf area,the greater the degree of rock breaking,and at the boundary of the goaf area,the lower the degree of rock breaking due to coal pillar support. When the transport roadway of the 6202E working surface is placed in the 20 m coal column area outside the 6403E face roadway,the influence area within the upper boundary is 17 m,and the influence area outside the transport roadway boundary is 17 m,which can effectively avoid the stress impact;the track lane is placed at 2 m from the 6403E track lane goaf area,the internal impact area is 15. 3 m,and the external impact area is 18. 4 m. The shed support can be used to control the proximity of the surrounding rock and the converging velocity.