临界距离 meaning in English

critical distance
threshold distance

Hereby the safety of the combined mining of thin seams under the close gob water was evaluated
根据分析的结果评价了临界距离老空水下薄煤层联合开采的安全性。
The traffic zone split is studied deeply . the research regards the critical distance of medium - long distance trip as the centroid distance between the two adjoining traffic zones , and uses this critical distance as the equivalent diameter to estimate the area of the traffic zone
对快速路系统规划的交通小区划分进行了深入研究，提出将大城市中长距离出行的这一界定值作为相邻两交通小区形心之间的距离，用这一临界距离值作为交通小区的等价直径值来估算小区规模。