非对称开采时矿柱岩爆的准则与前兆

CRITERIONS AND FOREWARNING OF ORE PILLAR ROCK BURSTS IN ASYMMETRIC MINING

本文建立了非对称开来时矿柱岩爆问题的简化力学模型，用计算机符号运算求出了模型的理论解。在此基础上讨论了岩爆准则与前兆，并进一步讨论了岩爆发展过程与前兆规律。文献[1]、[2]、[3]及本文的工作表明，各种条件下的矿柱岩爆问题都具有非恒定变形速率的特点，因此顶板下沉速率趋于无穷作为矿技岩爆前兆具有普遍性。

A simplified mechanical model for the ore pillar rock burst on the conditions of asymmetricmining is established in this paper and its theoretical solutions are solved out through the computer symboliccomputation. Based on these, the criterion and forewarning of rock burst are discussed. Furthermore, theevolution process and forewarning law of rock burst are strudied. References [1], [2], [3] and this paperindicate that all the problems of ore pillar rock burst on various conditions have the characteristics of nonstational deformation rate. So, it bears universality that the roof descending rate tending to infinity can betaken as the forewarning of ore pil1ar rock bursts