松软矿体系指具有疏松性或粘结性和可塑性的矿体。由于这种矿体松软、不稳定,节理较发育,所以一般不用爆破,用风镐或手镐即可直接落矿,但在开采时,顶板压力大,坑道维护困难,坑木难于回收,矿石损失相当大。因此,研究改进开采方法是非常必要的。目前苏州瓷土矿、海城滑石矿采用如下几种开采方法:1.留矿柱的分层崩落采矿法采用这种采矿法,主要采区运输巷道均设置于脉外底盘岩石内,并沿脉外运输巷道间隔 A loose ore body means an orebody that is loose or cohesive and malleable. As this ore body is soft and unstable, the joints are relatively developed. Therefore, it is generally not demolished, and can be directly demolished with picks or picks. However, when the mining is carried out, the pressure of the roof is large and the maintenance of the tunnel is difficult and the pit is difficult to recover. The loss is quite large. Therefore, it is necessary to study and improve the mining method. Current Suzhou clay, Haicheng talc mine using the following mining methods: 1. Retaining columns of the subsidence mining method using this mining method, the main mining area are set in the transport tunnel outside the veins within the rock, and along the pulse Outside transport lane interval