金川二矿区地下巷道变形监测分析及应用

金川矿山地下工程围岩的工程地质条件差，地压活动强烈，尤其是处于采矿动态环境中巷道的失稳更为严重。通过对二矿区地下巷道的长期变形监测，结合现场工程地质调查研究，综合分析了采准巷道的失稳主要受采动因素和岩体结构因素的影响。提出二次支护与巷道破坏后的重新支护宜强不宜弱的论点与地压控制措施，为后续采矿的顺利进行提供科学依据。

INTERPRETATION OF DEFORMATION MONITORING OF UNDERGROUND ROADWAYS AND ITS APPLICATION TO NO.2 DIGGINGS OF JINCHUAN MINE

The complexity of engineering condition at Jinchuan nickel mine is well known in China and abroad. The engineering geology condition of surrounding rock masses is very bad there. The activity of ground stress is highly intensitve. Especially the instability of tunnels located in the dynamic environment of mining is very serious. Based on the field investigations and deformation monitoring of underground tunnels at No.2 diggings of Jinchuan mine in long term,the main instability reasons of mining tunnels are synthetically analyzed. The main factors of influencing stability of tunnel are the activity of mining and the rock mass structure. It is pointed out that strong second support is better than limp one. Some measures to control stress are also given. The presented results will provide scientific instructions for the future mining.