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以土朱矿井煤仓硐室为例,运用损伤力学分析了巷道开挖效应;利用FLAC4.0数值模拟软件计算分析了大断面硐室围岩的稳定性,并建立了无支护和锚杆注浆联合支护两种模拟方案,两种方案模拟结果的对比显示锚注联合支护形式能够有效地加固围岩和控制围岩变形;通过工程类比法和FLAC数值模拟相结合对大断面硐室锚杆注浆联合支护方案进行了设计,确定了锚注联合支护参数,通过后期的现场观测,说明了锚杆注浆联合支护在大断面煤仓硐室支护中效果良好,能够保证硐室围岩的长期安全稳定.
Taking the coal bunker chamber of Tuju Mine as an example, the tunnel excavation effect was analyzed by using the damage mechanics. The stability of the surrounding rock of the large section chamber was calculated and analyzed by using FLAC4.0 numerical simulation software. Grouting combined support two kinds of simulation programs, the simulation results of the two programs show that the form of anchor and injection joint support can effectively reinforce the surrounding rock and control the deformation of surrounding rock; through analogy with engineering and FLAC numerical simulation of large cross-section Room grouting joint support program was designed to determine the anchor and grouting joint support parameters, through the late field observation shows that the anchor grouting joint support in large cross-section coal bunker with good results, To ensure the long-term safety and stability of rock chamber.