History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c12.s1.t6.8

v1.c12.s1.t6.8

Another stope 20-30 m across about 2 m high on average, with only occasional pillars is found. In this stope fireset holes are found both lateral, and in the floor and also in the roof. Timber props have been used both to hold up roof flakes and to stablise waste on the slope. Shallow trenches have been dug to convey water inflows to the path, and there are wooden launders for a similar purpose. One launder measured 5 m long u-section 30 x 30 cm. A radio carbon age of one launder gives 1920 years before present.