High sulphur deposits with spontaneous firing tendency and under river deposits are restricted to develop due to its technical conditions,especially for the small deposits.

• 有自燃趋势的高硫矿床与赋存于河谷下的矿床,由于开采技术条件复杂,限制了该类资源的及时开发利用,尤其是一些小型矿产资源。