Combined 25 Fai greenrock walls altogether , there are 20 in the coal seam recoverable range among them.
共组合25条辉绿岩墙，其中20条分布在煤层可采范围内。
3
Dongliang district of 'diabase which is the product of Jurassic-cretaceous Himalayan period. The property of the rock is Fai greenrock and they invades in the way of a high Angle rock wall.