水平下向分层充填采矿法开采缓倾斜矿体的地压应力分析
수평하향분층충전채광법개채완경사광체적지압응력분석
SIMPLE ANALYSIS ON THE EARTH STRESS OF MINING SLOW- DECLINING OREBODIES USING THE METHOD OF DOWNWARD HORIZONTAL LAYERING BACK- FILL MINING AND THE COUNTER- MEASURES THEREOF