当前岩石力学研究中若干关键问题的思考与认识

DISCUSSION ON SEVERAL KEY ISSUES IN CURRENT ROCK MECHANICS

本文对当前岩石力学发展中的若干关键问题提出自己的看法和建议。其中,首先涉及到高地应力对软弱围岩稳定性和硬质围岩的稳定性问题。第二方面涉及节理裂隙岩体和某些非线性软弱围岩及支护的研究。这其中涉及到复杂岩体的破裂机制和施工过程的影响。第三方面对模型试验方法的作用做了论述,并建议应着重在数值分析效果不佳的问题上采用模型试验。第四方面对于数值分析方法存在的问题做了评述,指出它们分别适用的条件、存在的问题和可能解决的途径。特别指出当前非连续介质分析法不能解算大工程问题的解决思路,还对复杂岩体的本构关系、今后研究的思路提出建议。最后对其他几个热点和难点问题谈了认识和建议,包括工程岩体稳定性的判据、应发展非确定性方法作为围岩稳定性判据,及用非连续分析法分析节理岩体进行真正裂隙网络固流耦合模型的渗流问题研究等。

In this paper,the author put forward some views and suggestions on several key problems in the development of current rock mechanics. Firstly,the stability of soft and hard surrounding rock under high geostress was discussed. Secondly,the jointed and fractured rock masses,the nonlinear weak surrounding rock and its support were studied,which dealt with the fracture mechanism of complex rock mass and the influence of construction process. Thirdly,the role of model test method was discussed,and the model test was proposed to be mainly applied when the numerical analysis failed to give reasonable results. Fourthly,the problems existing in the numerical analysis method were discussed,and the applicable conditions,the existing problems and the possible solutions were described. A clue to tackle the problem that the current discontinuous analysis method cannot solve large engineering problems was presented. For complex constitutive relation of rock mass,the research idea for the future were proposed. Finally,the author put forward his own idea and suggestions on several other hot and difficult problems,including the idea of nondeterministic analysis method as the surrounding rock stability criterion and the discontinuous analysis method of seepage problems for the true stress-water couple model of jointed rock mass.