Study On Strata-pressure Behavior At Surrounding Rock Of The Greater Mining Height

Based on the pressure monitoring of the large mining height stope, physical simulation experiment of structure and movement of strata overlying laboratory stope and numerical analysis of mine pressure on large mining height stope, this paper presents a study of large mining height control characteristics and rule of surrounding rock in detail. In addition, some works were analysed to study parameter optimization of improving the recovery rate of large mining height. In the research on induced mining pressure with large mining height, this paper analysed the character of the large mining height stope on-site mining pressure and summarizes the rules of sterss distribution of supported surrouding rocks and load-bearing in large mining height system. In the research on rule of structure and movement of strata overlying and the large mining height stope,2D and3D physical simulation experiments were conducted to analysed movement of strata and overlying the large mining height stope. In the experiment, white digital bulk spot related method was introduced as a means monitoring displacement of2D physical simulation experiment, and the roof strata structure and movement rules in mining process are studied in detail. In the data research about large mining height parameters's impact on mining pressure, workface length, width, height and mining speed were taken into account to study the characteristics of the stope mining pressure display respectively. Through on-site monitoring, laboratory experiment and numerical analysis, this paper take the characteristics of surrounding rock control of large mining height into account comprehensively, put forward for parameters optimization of increasing mining recovery rate in large mining height.