School of Resources and Safety Engineering, China University of Mining and Technology ( Beijing)

为揭示特大断面碎裂厚煤层巷道破坏机制,并对围岩进行有效控制,运用Winkler弹性地基梁理论,建立了巷道顶板弹性基础梁力学模型,推导出了煤巷顶板下沉量、顶板岩梁弯矩的特征函数公式,分析了顶板下沉量、顶板岩梁弯矩随巷道跨度的变化关系,并在东坡煤矿进行现场应用。现场实践表明:依据该模型计算结果,选用新型预应力桁架锚索支护系统进行现场巷道维护,有效解决了碎裂厚煤层巷道的围岩控制问题,证明了该模型的合理性。

In order to reveal the failure mechanism of cracked thick coal seam roadways with ultra large section and effectively control its surrounding rock, the Win kler elastic foundation beam theory was applied to establish the elastic foundation beam mechanical model of roadway roof. Besides, characteristic function formula of t he subsidence of coal roadway roof and roof rock beam moment was obtained. In addition, the variation relationship between roof subsidence and roof rock beam mom ent was analyzed, and was applied in Dongpo Mine. The field practice showed that when the new type of pre- stressed truss anchor cable support system was used. On the basis of this calculation result of the model, the surrounding rock control problem of cracked thick coal seam roadways was effectively solved, and the practice resul t proved the rationality of the model.

国家自然科学基金资助项目(51234005)；国家重大基础研究发展计划(973计划)资助项目(2010CB226800)；中央高校基本科研业务费专项资金资助项目(2010YZ02)；