There are several methods for blending, but the common way is to lay layers of different batches of ore on a bed, and then cut slices vertically through the bed.

混匀的方法有多种，但常用的方法是把不同批次的矿石一层层地铺成料堆，然后从料堆垂直切取。

youdao

Lambic-style beers can take years of aging and careful blending of multiple batches before they're ready to drink.

WSJ: The Sour and the Glory of Beer