Room-and-pillar mine workings subjected to high level horizontal stress

فصل «Room-and-pillar mine workings subjected to high level horizontal stress» از کتاب «Mine Planning and Equipment Selection 1998» بر «معدن‌کاری زیرزمینی مس» در حوزه «زمین‌شناسی، اکتشاف و معدن‌کاری مس» تمرکز دارد. مباحث اصلی آن شامل هدف‌گذاری اکتشاف و مدل کانسار است. این فصل برای تفسیر کانسار، هدف‌گذاری اکتشاف، ارزیابی ذخیره و تصمیم‌گیری زمین‌شناسی کاربرد دارد و ارتباط میان نظریه، انتخاب روش، شاخص‌های عملکرد و محدودیت‌های صنعتی را روشن می‌کند.

A problem of interaction between room-and-pillar panel, exploited in so called roof deflection technology, with overburden strata subjected to high level stress was analyzed numerically. A numerical experiment modeling a real three-dimensional mine layout was performed, using various boundary condition sets defined by different directions and values of horizontal load. Using the finite element method, the successive problems were solved and stress/deformation states were assigned to the respective boundary conditions. The presented approach was utilized for mine conditions encountered in one of the Polish underground copper mine, where research on three-dimensional stress field had been conducted in the past.