中文摘要：

随着煤矿采深加大与延伸,普通锚网（索）喷支护较难维持厚层复合顶板大断面煤巷围岩稳定性。通过对大量复合顶板事故调查及其产生过程分析,获得了复合顶板事故失稳机制及控制方案,并在许厂煤矿4312皮带顺槽进行了支护技术现场实践,取得了较好的支护效果。研究结果表明：为有效控制复合顶板岩层离层与竖向拉伸裂隙产生,可施加锚索来实现减跨作用,采取高强预应力锚固顶板下位复合岩层来提高岩梁的整体抗弯刚度,以减小顶板岩梁产生的弯曲应力;高强预应力锚杆、锚索、钢带和钢筋梯组成的＂四位一体＂的组合支护技术可较好地解决厚层复合顶板大断面沿空煤巷围岩稳定难题。

英文摘要：

With the increasing and extending of coal mining depth,common anchor-net-spouting supporting is difficult to ensure the stability of coal roadway rock with thick compound roof and big section.Through survey and analysis of compound roof failure incidents,the accident instability mechanism and control scheme are obtained and practiced in 4312 belting crossheading of Xuchang mine,the field support effect is good.The results show that,in order to prevent the occurrence of roof separation and vertical tensile fractures,anchor cable can be applied for the decrease of span length of roof beam,anchoring the roof compound rock beams with high strength prestressed anchor cable and bolt can be implemented for the increase of integral bending stiffness,in these ways,the bending stress of roof rock beam can be decreased effectively.Combined support of high strength prestressed anchor-cable-strap-ladder can maintain the rock stability of gob-side roadway with thick compound roof and big section.