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本文叙述荷兰戴次夫特大学力学实验室的一项研究结果,该项研究的目的是控制高压状态下的井下巷道围岩的破碎过程。模型实验表明,如果通过人工使巷道周围一定厚度的岩石圈弱化和卸压,该巷道围岩移近量将会大大减小。通过井下现场试验证实,巷道周围管状卸压岩体可以支承周围岩基的严重应力偏移,因而巷道实际上并未受到破坏。作者希望本文介绍的实验过程不仅有助于提高深部煤炭开采的经济性,而且扩大其开采范围。
This article describes the results of a study conducted by the Mechanics Laboratory at Day-Deep University in the Netherlands, which aims to control the crushing process of the surrounding rock in underground tunnels under high pressure. The model experiment shows that if the thickness of the lithosphere surrounding the tunnel is weakened and relieved by artificial means, the amount of surrounding rock movement in the tunnel will be greatly reduced. Through the downhole field test, it is confirmed that the tubular pressure relief rock mass surrounding the tunnel can support the serious stress migration of the surrounding rock foundation, so the tunnel has not actually been destroyed. The authors hope that the experimental procedure presented in this article will not only help to improve the economics of deep-seated coal but will also expand the scope of its exploitation.