大范围缓倾斜矿体采区开采应力响应规律研究

Study on the stress response law of mining in mining area of the large-scale gently inclined orebody

随着开采向深部推进,地压显现越来越明显,相应地对地压控制的要求也会越来越高。为了更好地控制地压,需要变被动控制为主动控制,合理的回采顺序即是一种主动控制地压的方法。目前三宁矿业挑水河磷矿井下采用沿盘区短轴逐个回采的工艺,运用数值模拟的手段研究该回采顺序的位移、应力和塑性区,并得出相应的规律,可为下一步优化回采顺序提供理论基础。

With the mining advancing to the deep, the ground pressure would become more and more obvious, and correspondingly the requirements for the ground pressure control would be higher and higher. In order to better control the ground pressure, the passive control should be changed into active control, and a reasonable stoping sequence was a method of actively controlling the ground pressure. At present, the process of one by one mining along the short axis of the panel was used in the underground of the Tiaoshuihe phosphate mine from Sanning Mining. The method of numerical simulation was used to study the displacement, stress and plastic zone of the stoping sequence, and the corresponding laws were obtained, which could provide theoretical basis for optimizing the stoping sequence in the next step.