回采巷道底臌力学原理及控制研究新进展

分析了国内外回采巷道底臌力学原理及控制技术方面的研究成果.传统的底臌控制研究均围绕巷道底板进行,难以从根本上解决回采巷道底臌控制问题.通过现场试验及理论分析认为,回采巷道底臌的主要影响因素是工作面超前支承压力,回采巷道底臌主要来自底板破碎岩层的峰后变形,而顶板、两帮的变形对底臌亦产生重要影响,因此,回采巷道的底臌控制与巷道围岩整体稳定性有关,在提高巷道围岩整体稳定性的同时,加固帮、角可较好地控制回采巷道的底臌.参47.

New development of mechanism and control technique study of extraction opening floor heave

The new study results of mechanical principle and control technique of extraction opening floor heave are introduced in this paper. The traditional study of floor heave is apt to center around the floor strata, it is difficult to solve the problem of floor heave control. On the basis of field test and theory analysis, it is proposed that the abutment pressure of working face is the main effect factor of extracting opening floor heave, the floor heave come mainly from slump along crack of breaking rock, at the same time, the deformation of sides and roof produce important effect to heave floor. Therefore the floor heave control has relationship with the integer stability of the surrounding rock,it is important to raise stability of surrounding rock of extraction opening, the floor heave can be basically controlled by reinforcing sides and corners.47refs.