By researching microbial characteristics of tobacco straw overburden to determine which season and which collocation ratio was the most suitable for decomposition of the tobacco straw overburden.
The ratio of overburden of the north part to no. 6 line is calculated.
以6号勘探线北部为例计算了剥采比。
3
The statistical results show that the clays have high water contents, and the ratio of their vane test strength vs. the effective overburden pressure ranges from 0.2 to 0.4.