(1) Empty field mining method. It is characterized in that during the mining process, the goaf is mainly supported by the retained or permanently retained pillars, and the goaf is always empty. Generally used when the ore and surrounding rock are very stable.
(2) Caving mining method. It is characterized in that, with the mining of ore, it is planned to fill the goaf with the cover rock and the upper and lower rock of the collapsed ore body, and timely control the ground pressure of the goaf and the treatment of the goaf. It is generally used under the condition that the surrounding rock of the ore body is unstable and the surface is allowed to fall.
(3) Mining and mining law. It is characterized in that during the mining process, some ore collected in the goaf is temporarily retained, so as to support the pillar to support the goaf. Generally, the ore is relatively stable, and it is not easy to be oxidized, bonded and spontaneously burned, and the ore body surrounding rock is moderately stable.
(4) Filling mining method. The utility model is characterized in that, in the mining, the goaf supports the goaf by means of the artificial support body formed by filling the filler, the pillar or the filler and the filler. It is mainly used for ore bodies with high value of mining ore, high recovery rate, convenient filling materials, no surface subsidence and special complex geological conditions.
Self-propagating Wear Resistant Pipe
The editor shared today what the ceramic self-propagating wear-resistant pipe manufacturers are like. First of all, I will recommend a good manufacturer and then talk about the products. Jiangsu Jianghe is a manufacturer specializing in the production of this pipe. Years old, the products produced are not only of good quality, but also of favorable price, timely delivery, and can meet the various requirements of customers. I think these are the conditions that all customers need. The ceramic self-propagating wear-resistant pipe manufacturer is actually a sintered ceramic wear-resistant pipe, which is an integral casting product. The outer steel pipe is made of Q235 material, which is light in weight, can be cut and welded, and is easy to install and use.
Self-Propagating Wear Resistant Pipe,Self-Propagating Ceramic Pipe Fitting,Seamless Steel Pipe Fittings,Resistant Alloy Composite Pipe
Jiangsu Jianghe Machinery Manufacturing Co., Ltd. , https://www.jhceramiclinedpipe.com