近距离煤层同采巷道混合布置参数分析

Mixed Layout Parameters of Simultaneous Mining Roadways in Close Multiple-seam

为探讨近距离煤层同采时回采巷道的布置方式与参数,分析了近距离煤层回采巷道不同布置方式的优缺点及适用条件,根据泉店煤矿东翼11采区的地质赋存条件及矿井生产现状,确定其近距离煤层回采巷道采用混合布置方式。依据上煤层开采后采空区边缘与下煤层巷道之间的弹塑性分布区与应力梯度分布状况,以及巷道围岩表面变形量,分别确定下煤层上巷相对上煤层上巷向上平错20m,下煤层下巷相对上煤层下巷向上平错10m。在泉店煤矿东翼11采区首采面进行近距离煤层同采巷道混合布置的应用与实测,现场实测表明巷道变形量得到有效控制,说明其同采巷道布置合理。

In order to get reasonable layouts and parameters of simultaneous mining gateroads in close multiple-seam,advantages,disadvantages and application conditions of different gateroad layouts in close multiple-seam were analyzed in this study.Setting the east wing No.11 mining section of Quandian Mine as the analytical goal,this paper shows that mixed layout methods in its close multiple-seam should be applied based on its geological conditions and production situations.According to the elastic-plastic distribution area and the stress gradient between gob edge in upper seam and gateroads in lower seam as well as the surrounding rock deformation of the roadways,it was determined that the tailgate in lower seam should have a horizontal heave of 20 mupward in relation to tailgate in upper seam,and headgate in lower seam should have a horizontal heave of 10 mupward in relation to headgate in upper seam.Field application and measurement of mixed-layout gateroads were also conducted at the first mining panel in east wing No.11 section of Quandian Mine.The results show that the deformation of gateroads is effectively controlled,testifying the reasonability of the layout of simultaneous mining gateroads.