金川二矿区围岩-充填体应力场的本构关系

本文结合金川二矿区充填机理研究工作的长期实践,应用粘弹塑性理论和增量计算方法,论述了围岩、矿体、充填体三者共同吻合变形作用的本构关系,较好地解决了金川二矿区一号矿体下向大面积胶结充填体和岩体共同作用时围岩的稳定性问题,计算结果与现场观测的围岩变形位移基本符合。为二矿区一号矿体采用大面积下向胶结充填、沿走向连续回采而不留间隔矿柱回采提供了理论依据。本项成果已在金川二矿区应用并取得了明显的效益。

CONSTITUTIVE EQUATION ON STRESS FIELD OF WALLROCK-FILL IN JINGCHUAN''S No.2 MINING AREA

On the basis of long term research on filling support mechanism in Jingchuan Nickel Mine, a constitutive equation on coincidental deformation among wallrock, orebody and fill was established by using viscoelastop-lastic theory and increment calculation method with the equation, the problem of wallrock stability has been solved satisfactorily. It is shown that the predicted results were tallied with actually measured wallrock displacement. Taking these constitutive equations as a theoretical basis, a large scale of mining production has been conducted by using under cut-and-fill cement filling in No.1 orebody of Jingchuan's No.2 mining area , resulting in remarkable profits.