Post room-and-pillar mining is a combination of room-and-pillar mining and cut-and-fill stoping mining, whereas step room-and-pillar mining is a variation of room-and-pillar mining in which the footwall of an inclined ore body is adapted for use of trackless equipment.
The invention discloses pillar-combinations for mining methods, it is characterized in that pillars of a house structure is used for top, the bottom of stope, and with pillars of a house structure and open-stope method, shrinkage method or avalanche method use in conjunction, to obtain six kinds of underground combinations for mining methods: promptly move towards the segmentation pillars of a .
Combination of complementary data mining methods for geographical characterization of extra virgin olive oils based on mineral composition Food Chem . 2018 Sep 30;261:42-50. doi: 10.1016/j.foodchem.2018.04.019.
There are different methods of mountaintop removal coal mining, including the box-cut method, steep-slope method, cross-ridge method, and a few others. Mountaintop removal involves several steps, as described below. The vegetation and topsoil of the mountaintop are removed first.
In order to reach this fact, the results of two methods U-statistics and Mahalanobis distance for discerning geochemical distributions have been combined with three Data Mining methods K-NN, naïve Bayes, and decision tree. At last, the combination between them and decision tree method would be introduced as the most powerful approach. 2.
2) Room (Bor d)-and-Pillar mining (or con tinuous mining) method It is the most common supported pillar method, designed and used primarily for mining flat-lying