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A Review and Evaluation of Pillar Design Criteria for Use in Evaporite Mines

其他書名	N.S. MDA : Final Report
出版	Canada-Nova Scotia Cooperation Agreement on Mineral Development, 1993
URL	http://books.google.com.hk/books?id=xNA9jwEACAAJ&hl=&source=gbs_api

註釋The literature on pillar design in mining was reviewed to identify methods proposed for use in evaporites that might be adapted for the application. Since the majority of empirical design formulae were developed from observations in coal mines and involve the width and height of the pillar and constants related to the strength of the coal mass, a survey of salt and potash mines was conducted to establish a relevant data base of pillar design and pillar performance. This information, augmented by some case histories from the literature, was used to test the applicability of several of the empirical design methods. Applicable rock mass strength constants were determined for evaporite pillar design using the equations of Holland and Bieniawski, in addition to one new relationship. The Canadian Salt Co. mine at Pugwash, Nova Scotia was used to test the proposed design formula. A series of convergence stations was established in the mine to assess the stability of existing pillars.