韩家湾煤矿浅埋煤层综采面过切眼相似模拟实验研究

文章针对韩家湾煤矿浅埋煤层2403综采面回采时遇到如何过旧切眼的问题,进行了相似模拟实验,通过压力传感器实时监测和全站仪读取测点位移研究了综采面直接推过不同支护下的切眼的过程中支架载荷变化、支承压力变化及上覆岩层运动情况。研究结果表明:在对旧切眼适当支护后综采面直接推过该切眼是可行的。

The Research on Similarity Simulation Experiment of Fully-Mechanized Coalface Passes through the Open-off Cut in Shallow Coal Seam in Hanjiawan Coal Mine

Hanjiawan Coal Mine of North Shaanxi Mining Co. Ltd. drove open-off cut (old) developing gateways of section 2403 after encountering erosion zone, and then continued excavating forward to clarify the range of the erosion zone. After excavated 25m erosion zone, the seam was found being recovery normal, and drove a new open-off cut nearby recoverable boundary, got about 700 000t coal. Then the problem is resulted, i.e. No. 2403 fully-mechanized coalface how to pass through the old open-off cut. Could fully-mechanized coalface pass directly through the old open-off cut? We take the similar simulation experiment to study the support loading change, abutment pressure distribution and overburden movement by real-time detection in pressure sensors and record value of displacement of measuring points by means of the electronic total station in the period of fully-mechanized coalface passed directly through the old open-off cut. The experiment results shows that the fully-mechanized coal face passes directly through the old open-off cut is feasible after supporting it properly.