Study on Strata Behavior Regularity of 1301 Face in Thick Bedrock of Wei - qiang Coal Mine

2017 2nd International Seminar on Advances in Materials Science and Engineering

Gu, Shuancheng^1 ; Yao, Boyu^1

Xi'An University of Science and Technology, Shaanxi Xi'an

710054, China^1

关键词: Average Distance;    First weighting;    Mining face;    Pressure step-change;    Strata behavior;    Working face;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/231/1/012108/pdf
DOI  :  10.1088/1757-899X/231/1/012108

来源: IOP

【 摘 要 】

In order to ensure the safe and efficient production of the thick bedrock face, the rule of the strata behavior of the thick bedrock face is discussed through the observation of the strata pressure of the 1301 first mining face in Wei qiang coal mine. The initial face is to press the average distance of 50.75m, the periodic weighting is to press the average distance of 12.1m; during the normal mining period, although the upper roof can not be broken at the same time, but the pressure step is basically the same; the working face for the first weighting and periodical weighting is more obvious to the change of pressure step change, when the pressure of the working face is coming, the stent force increased significantly, but there are still part of the stent work resistance exceeds the rated working resistance, low stability, still need to strengthen management.