采空区对高速铁路的稳定性评价分析

为分析某采空区对铁路工程结构的影响,确定合理的安全距离。利用移动角理论对开采影响距离进行了预测,从采空区与铁路工程结构的空间相对位置建立数值模型,分析了露天开采和地下开采两种方式对铁路工程结构的影响。研究表明:依据理论计算结果,可知矿体开采引起的地面变形范围远小于该矿体露头距离线路最近距离。依据数值模拟结果,可知露天开采引起的围岩变形和衬砌位移均大于地下开采引起的位移,但两者都在规范范围之内,不会影响铁路工程结构安全。基于此,提出了一种新的铁路安全保护距离确定方法,对矿区高速铁路建设的规划、选线具有一定的实用意义。

Evaluation and analysis of the stability of the high speed railway in the mined out area

In order to analyze the influence of a mined out area on the railway engineering structure, and to determine the reasonable safe distance.The numerical model was established to simulate the situation between railway engineering structureand underlying goaf and analyze the influence of two ways of open pit mining and underground mining on railway engineering structure .The study shows that :Based on the theoretical calculation results,the range of ground deformation caused by ore body mining is much smaller than the nearest distance from the line of outcrop of the ore body.Based on the results of numerical simulation,The deformation of surrounding rock and lining displacement caused by open pit mining are larger than that of underground excavation, but both of them are within the scope of the specification, which will not affect the safety of railway engineering structure.Based on this, this paper puts forward a new method to determine the distance of railway safety protection, which has certain practical significance for the planning and line selection of high-speed railway construction in mining area.