论文部分内容阅读
以新型让压锚杆的研发及其在煤矿系统大变形巷道中的成功应用为基础,提出了在交通隧道软岩大变形支护过程中应采用“及时支护、强支护与让压支护”三者相结合的基本原则,即保持一定支护阻力维持围岩稳定的同时,允许支护体系产生一定的位移,以达到支护、让压及卸载多重并举的功能。并据此设计了由让压锚杆、喷射砼、让压控制器及钢拱架等组成的让压支护体系。通过探讨让压锚杆的基本作用机理,对让压支护系统的各组成构件、关键技术等问题深入分析,提出了让压支护系统中构件间的组合方式,指出了今后需解决的关键技术问题:即保持让压支护系统变形协调性及稳定性,确定围岩自由变形量、围岩-支护共同变形量及恒阻让压量三者之间的关系,科学设定起始让压荷载及保持构件恒阻让压特性等。同时建议未来依托合适的工程背景开展让压支护系统的现场试验研究,进一步验证该系统的可靠性与适宜性。
Based on the research and development of a new type of compression bolt and its successful application in the large deformation tunnel of coal mine system, it is proposed that the method of “timely support, strong support and let pressure Support ”the three basic principles, that is, to maintain a certain degree of support resistance to maintain the stability of the surrounding rock while allowing the support system to produce a certain displacement in order to achieve support, so that pressure and unloading multiple functions simultaneously. Based on this, a pressure relief support system composed of pressure bolt, spray concrete, pressure controller and steel arch is designed. By discussing the basic mechanism of the pressure bolt and analyzing the components and key technologies of the pressure support system, the ways to make the components in the pressure support system are put forward, and the key to be solved in the future is pointed out. Technical problems: to maintain the deformation of the support system for the coordination and stability, to determine the free rock mass deformation, rock mass - the total amount of deformation and constant pressure to allow the relationship between the pressure, the scientific set start Let the pressure load and keep the components constant pressure to keep pressure characteristics. In the meantime, it is suggested to carry out on-the-spot experimental research on pressure relief support system based on appropriate engineering background to further verify the reliability and suitability of the system.