铜矿峪矿自然崩落法地压控制及地压区矿量回收技术

针对自然崩落法采动影响大、地压显现严重等特点，以铜矿峪矿自然崩落法为研究对象，结合矿山主副层开采的现状，对自然崩落法开采过程中、矿体底盘的应力演变进行数值模拟，并对主副层交界处的应力及塑性区进行分析。针对极端条件下的副层高分层地压区矿量回收，提出了下部重开底部结构，中部强制崩落、上部自然塌落的接矿方案。模拟及实践结果证明：由于压力拱式的结构使得副层底部结构处于高应力区域，尤其在主副层采场贯通的前后，为此应提前加强副层底部结构出矿或采用深孔实施泄压工程。其次，对于地压区显现剧烈区域，可以等地压稳定后进行疏通治理或重造底部结构进行下水平接矿。

Ground Pressure Control and Mineral Recovery Technology in Ground Pressure Area of Tongkuangy Mine Natural Caving Method

According to the characteristics of natural caving method such as large mining influence and serious ground pressure.In this paper,the natural caving method of Tongkuangyu Copper Mine is taken as the research object,combined with the current status of the mining of the main and auxiliary layers of the mine,the numerical simulation of the stress evolution of the ore body chassis during the natural caving method mining,and the stress at the junction of the main and auxiliary layers and plastic zone analysis.Aiming at the recovery of the amount of ore in the sub stratified high pressure ground pressure zone under extreme conditions,an ore joining scheme is proposed in which the lower part reopens the bottom structure,the central part is forced to collapse,and the upper part naturally collapses.The simulation and practical results prove that the bottom structure of the auxiliary layer is in a high stress area due to the pressure arch structure,especially before and after the main and auxiliary layer stopes are penetrated.Therefore,the bottom structure of the auxiliary layer should be strengthened in advance or deep holes should be used to discharge pressure engineering.Secondly,for areas where the geopressure area appears to be severe,you can wait for the geopressure to stabilize and then dredge or rebuild the bottom structure to carry out horizontal ore connection.