深部开采底板岩层损伤破裂实测

Measurement of Damage and Fracture of Floor Strata in Deep Mining

本文采用数值计算和钻孔双端封堵测漏法对11301工作面底板损伤破裂深度进行现场实测。通过计算公式对底板破坏深度进行预算,在现场实测设计观测孔时,主要对底板破坏深度在10m～17m范围内的损伤区域进行控制研究;结合预算结果确定探测方案,方策结果表明,实测底板损伤破坏深度为12.9m。综合分析经验公式、数值模拟、现场实测得出来的底板损伤破裂深度,确定底板破坏深度13m左右是可信的。

In this paper,the damage and fracture depth of 11301 working face floor is measured by numerical calculation and two-end sealing leak detection method.The damage depth of the floor is estimated by calculating formula,and the damage area of the floor is controlled and studied in the range of 10m to 17m when the observation hole is designed.The detection scheme is determined according to the result of the budget,and the result shows that the measured damage depth of the floor is 12.9m.It is credible to determine the floor failure depth of 13m after the comprehensive analysis of the empirical formula,numerical simulation and the measured damage and fracture depth of the floor.