How is Yueqing agate mined?

The Yueqing agate mine must be mined professionally. The diameter of the hole is about 1.5 meters, and the depth of the hole is about 30 meters. It is vertical when looking in from the hole. Outside the hole, one end of a thumb-thick hemp rope is firmly tied to a windlass, and the other end is tied to a large basket that extends into the hole. end. He was carried deep into the mine with a big basket in his arms. After reaching the bottom of the cave, there was a parallel passage. The flintman followed the lead and used an iron drill to chisel off pieces of agate stone and transported them out in a basket. First use a shovel or iron drill to dig into the earth or rock. When you dig to a depth of more than half a person, you need to use a windlass to transport the earth or stones. There are staggered 'dimples' on the walls of the mine, which are used for pedaling. place.