School of Mechanics and Civil Engineering,China University of Mining and Technology (Beiing) National Key Lab of
Deep Geomechanics and Underground Engineering Dayang Mine, Shanxi Lanhua Sci-Tech Venture Company
Limited

为了解决构造区破碎围岩巷道的支护问题,以兴业煤矿主斜井为研究背景,采用工程地质分析、数值模拟、理论计算和现场监测相结合的方法,对巷道变形破坏特征、变形破坏机理和支护对策进行了研究。研究结果表明:巷道变形破坏受围岩性质、地质构造、水、采空区、支护形式等多种因素的影响,其变形力学机制确定为ⅠAB CⅡA DⅢA B C复合型变形力学机制。通过变形力学机制转化,提出了"锚网索喷+底角锚杆+全断面注浆"耦合支护方案。数值模拟及现场工业试验结果显示,在此支护方案下,实现了支护体与围岩的耦合,经120天的监测结果显示,相比原支护方案,顶底板、两帮移近量分别由原来的380、345.7 mm降至46.7、36.9 mm。

In order to solve the support problems of roadway with broken surrounding rock in the structure zone,based on the mine main inclined shaft of Xingye Mine as the study background,an engineering geological analysis,numerical simulation,theoretical calculation and site monitoring and measuring combined method were applied to the study on the deformation failure features ,deformation failure mechanism and support countermeasures of the roadway. The study results showed that the deformatio n failure of the roadway was affected by the surrounding rock property,geological structure,water,goaf,support method and several factors and the deformation mechanics mechanism was determined as I ABC I ADIABCcomplex type deformation mechanics mechanism. With the deformation mechanics mechanism transformed,a " bolt / stee | mesh 1 anchor 1 shotcrete + floor corner bolt + full sectional grouting" coupling support method was provided. The numerical simulation results showed that under the supp ort plan,the coupling of the support mass and the surrounding rock was realized.The monitoring and measuring results of 120 days showed that in comparison with the pre vious support plan,the convergence between the roof and floor and between the two sidewalls was reduced from the previous 380 and 345. 7 mm to 46.7 and 36.9 mm ind ividually. the surrounding rock deformation was effectively controlled.

国家自然科学基金资助项目(51479195；51404278)；