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针对煤矿大断面回采巷道的薄层状顶、底板条件和受构造及采动影响较大的情况,分别采用悬吊理论、自然平衡拱理论、组合梁理论、加固拱理论分析计算,采用工程类比法分析,明确了支护重点为巷道顶板,并得出了巷道锚杆支护参数。对支护参数的对比分析和应用实践表明,组合梁理论对巷道支护设计的指导性较差,采用其他3种支护理论和工程类比相结合的方法可以较好地指导大断面煤巷的支护设计。
Aiming at the conditions of the top and bottom of thin-walled mining roadway with large cross-section in coal mines and the great influence on the structure and mining, the paper adopts suspension theory, natural balance arch theory, composite beam theory and reinforced arch theory to analyze and calculate, Analysis of law, clearly support the key points for the roadway roof, and reached the roadway bolt support parameters. The comparative analysis and application practice of the support parameters show that the composite beam theory has poor guidance to the roadway support design. By using the other three kinds of support theories and engineering analogy, it can well guide the large section of coal roadway Support design.