摘要
以相邻工作面作为研究对象,采用现场实测的方法,对15202工作面侧向支承压力分布规律和15204工作面超前支承压力分布规律进行了分析,结果表明:超前动压影响范围在60 m左右,超前支承压力最大峰值在煤壁前方9 m^10 m范围内,实测煤体破裂区范围0 m^2 m,塑性区宽度7.4 m^8 m;由侧向支承压力分布规律得到侧向支承压力在6m处出现转折,而其峰值在9.5 m以外,由内外应力场理论可推断在6 m侧向顶板发生断裂,即内应力场影响范围为6 m。
The adjacent working face was studied. The method is the field test. The abutment pressure distribution law of the lateral of 15202 working face and the advance support pressure distribution law of 15204 working face were analyzed. The results are that: the advanced dynamic pressure range around 60 m. The maximum peak abutment pressure in front of the coal wall is in the range of 9 m-10 m. The measured range of the rupture of coal body is 0 m-2 m. The width of the plastic zone is 7.4 m-8 m m. According to the abutment pressure distribution law, the side abutment pressure in 6 m turning and the peak beyond is 9.5 m. From the internal and the external stress field theory can be inferred to occur in the 6 m side of roof fracture.
出处
《能源与节能》
2015年第8期128-129,共2页
Energy and Energy Conservation
关键词
相邻工作面
侧向支承压力
超前支承压力
adjacent working face
side abutment pressure
advance support pressure