The effective mining method at small piece section of superhigh and complicated seam is explored.
探索有效的特厚复杂结构煤层小块段的开采方式,可提高效益,降低消耗,开采简单,便于生产。
In order to provide scientific parameters for ore deposit reserve calculation small block weight multivariate linear regression equation was established with regression analysis of mathematic geology starting from the original measurement data of small block weight samples of the Xitieshan lead and zinc deposit.
从锡铁山铅锌矿床小块体重样品原始测定数据入手,运用数学地质中的回归分析,建立了本矿床的小块体重多元线性回归方程,为矿床储量计算提供了科学参数。
Two methods for drip irrigation scheduling for cash crop cultivation in greenhouses and small-scale farmlands are presented in this paper.
介绍了适合日光温室、塑料大棚等设施栽培和小块农田经济作物栽培滴灌灌溉计划制定的2种方法。