【摘要】 以顾桥矿断层为例,探索断层破碎带岩巷分步联合支护技术.顾桥矿南翼胶带机大巷掘进过程中遇断层破碎带,高地应力环境引起软弱破碎围岩体加速蠕变,造成原支护方案失效.分析构造带附近巷道围岩控制的难点及其支护机制,对顾桥矿南翼胶带机大巷掘进过断层破碎带支护优化方案,提出采用分步联合支护设计理念,基于西原体流变模型,确定了合理二次支护时机;最终顺利通过了断层破碎带,并取得了理想的支护效果.针对构造带附近巷道支护,提高围岩的完整性对巷道围岩的控制至关重要,支护过程中的适度让压,可使各种支护手段在时间和空间上有效结合,最终充分发挥并提高围岩的自身承载能力.更多还原

【Abstract】 With the fault broken belt at Guqiao Coal Mine as an example,this paper studies the fractional step and combined support technique of rock roadway. There are fault fracture zones in the sealing- tape machine main roadway of the south limb in Guqiao Mine,and high ground stress deduced the rapid creep of weak broken wall rock,giving rise to the failure of the original support scheme. This paper also analyzes the difficulties of controlling entry stability for structure belt and its support mechanism,and in accordance with the optimized scheme for the Guqiao Mine,the design idea for fractional step and combined support was proposed.Based on the west protomer rheological model,the rational secondary support opportunity is confirmed. It goes through the fault fracture zone with the width. Moreover,the ideal support effect is obtained. Regarding the roadway support around structural belt,it is vital to improve the integrity of the surrounding rocks for the control of roadway rocks,with the proper yield during the process of support. The variety of support method can be combined effectively in time and space,and ultimately the carrying capacity of the surrounding rocks could be fully developed and improved.更多还原