In the test of the large diameter longhole mining of No.91 orebody at Tongkeng mine,the stress and the displacement of wall rock at the stope drilling chamber were monitored.

• 在铜坑矿91号矿体大直径深孔采矿法试验过程中，对采场凿岩硐室围岩的应力状态和岩移进行了监测。