【作者】 刘泽；

【导师】 朱川曲；

【作者基本信息】 湖南科技大学 ， 采矿工程， 2008， 硕士

【摘要】 沿空留巷技术是煤矿开采及回采巷道支护技术的一项重大改革,对提高煤炭资源回收率、降低巷道掘进率、缓减采掘紧张关系和实现矿井集约化生产有显著效果,但是沿空留巷围岩松软破碎,受到两次采动影响,巷道围岩稳定性难以控制。本文针对沿空留巷围岩变形大、力学特性存在较大变异的特点,采用理论研究、数值模拟和实例分析等综合研究手段和方法,运用工程结构可靠性理论、岩石力学和弹塑性力学以及计算机技术等理论,围绕沿空留巷巷内锚杆支护、巷旁高水速凝材料充填支护方式的结构可靠性进行了比较系统的分析,取得了如下成果:1、根据沿空留巷围岩活动规律,建立了沿空留巷围岩结构力学模型,系统地研究了沿空留巷围岩稳定性控制的原理与方法。2、建立了沿空留巷巷内锚杆支护、巷旁高水速凝材料充填支护的结构可靠性和系统可靠性分析模型。3、分析了可靠度计算的各种方法,针对沿空留巷支护极限状态方程的高度非线性,采用蒙特卡罗法计算沿空留巷支护结构可靠度。4、基于蒙特卡罗法研制了计算沿空留巷支护结构可靠度计算辅助软件,提高了工程设计的效率,开辟了沿空留巷支护结构可靠度计算的新途径。5、采用数值计算方法模拟了基于可靠性设计的沿空留巷支护方案的支护效果,验证了沿空留巷支护结构可靠性判别准则和所采用的结构可靠度计算系统的合理性和可行性。更多还原

【Abstract】 Gob-side entry retaining support technology is a graveness reform of supporting technology in coal mine, it is distinctly beneficial to increasing the extraction rate, reducing the roadway drayage rate、easing the intense relationship between mining and drivage and intension production. But gob-side entry will serve a long time and be infected twice by mining, the stability of its surrounding rock is hard to be controlled. Aiming at the characteristic of the big surrounding rock deformation and the variance of the mechanical characteristic, adopted synthetical research means including theoretic study、numerical simulation、mathematical analysis and engineering examples, analysised the stability of the bolt supporting and the supporting zone filled with high-water rapid hardening materials from the angle of system engineering by the theories of engineering structures stability theory, system stability theory, rock mechanics, elastic-plastic mechanics and computer technology, the following results were gotten in this paper:1. According to the surrounding rock moving regulation of gob-side entry retaining, its mechanical model was established, the principle and methods to control the stability of the surrounding rock is gotten.2. The stability model of bolting and filling body and the systemic stability model of this supporting structure were established.3. The calculation methods of stability were analyzed. Aimed at the high nonlinear limit state equation of supporting structure, the merits and details of Mente-carlo method were studied.4. Based on Mente-carlo method, software aimed to calculate its stability was developed which started a new approach of supporting structure stability calculation.5. The effect of supporting project designed based on the stability analysis was simulated by FLAC 2D, the stability judgment rules to the gob-side entry retaining supporting structure and the rationality and feasibility of the calculation system adopted in this paper were validated.更多还原