ABSTRACT
The monitoring and forecasting of ground pressure activities is an important part to control ground pressure. It can fully reveal the routines of ground pressure activities, and provide accurate and reliable monitoring & analytical data and relevant information to decision makers of production. That is conducive to make reasonable arrangements and ensure ongoing safety for the production. The current monitoring system makes a supervision on rock movement activities, rock stress, and deformation of rock stability, supplemented by patrol surveillance. By doing this, it can give a prediction and judgment after grasping the true conditions of rock cracking, damage, rock bursts, pillar peeling and other cases. As there is obvious precursors before the failure of the goaf, and the damage is progressive (Ma & Xie 2013). It is with important significance to establish a sound monitoring and forecasting system of ground pressure activities for
1 INTRODUCTION
Pangushan Bismuth & Tungsten Mine is the only production site of Pangushan Jiangxi Tungsten Industry Co., Ltd. The Mine is located 33 kilometers south of the city of Yudu County, Jiangxi Province, and it’s under the administrative jurisdiction of Pangushan Town in Yudu County of Jiangxi. Composed by three sets of veins, the mine is developed with joints, and there are seven groups of distributed faults. In June 1966 and July 1967, destructive activities of ground pressure occurred in the upper part of the mine, causing serious losses. After it was converted to deep mining since the 1990s, ground pressure activities occurred frequently, and in the mid-sections of 535 m-485 m and 485 m-335 m, the active blocks in vertical goaf are big enough to pose serious threats.
