Sentence examples for pillar method from inspiring English sources
Mine operators started using the "room and pillar method" -- carving the supporting pillars in a regular grid to allow space between them for roads and buildings.
It is a variant of the bord and pillar method of mining.
In China, engineering geological disasters are frequently encountered in the underground mining sites where room and pillar method is used.
About 93% of underground production is achieved by Bord & Pillar method, mostly by conventional hand section with a low productivity of about 0.87 tonnes per man shift.
No.3 seam of 11.5 m thickness of GDK No.10 incline was developed by conventional board and pillar method and depillared by Blasting Gallery method.
In Singareni Collieries Company Ltd. (SCCL), about 60% of coal is locked up in standing pillars formed by Bord and Pillar method (Internal Reports on BG method in the SCCL).
Finally, after a comparison carried out based on the effective factors, between the four mining methods including area mining, room and pillar, cut and fill and stope and pillar methods, the stope and pillar mining method was selected as the most suitable method to this mine.
Stone mines in the Eastern and Midwestern United States make use of the room-and-pillar method of mining to extract relatively flat-laying sedimentary formations.
The paper presents the results obtained thanks to the C.A. approach in an underground gypsum quarry (Italy), exploited by conventional rooms and pillars method by drilling and blasting.
The exploitation of the granite, which is used in the ceramic industry, was carried out by the rooms and rib pillars method.
An important method of sub-surface mining is the room-and-pillar method.
