Abstract:Pulang copper mine is exploited by natural caving method, and the unreleased ore bodies pile up on the bottom structure, which is easy to cause the crushing damage of the pillar and threaten the stability of the bottom structure. The stress distribution of the bottom structure in the mining process can be timely grasped by using the ground pressure monitoring technology, and the stress concentration area of the bottom structure can be locked. Then, by studying the relation between ore drawing amount and the stress distribution of bottom structure, the ore drawing plan at each ore drawing port can be optimized and balanced, and the stress distribution of bottom structure can be adjusted, so as to reduce the damage of stress concentration on the bottom structure.