在浦市磷矿投产初期,对于顶板不够稳固的缓倾斜薄矿体,曾采用单分层长壁式崩落法开采。实践表明,该采矿法在我矿的地质和采矿技术条件下,无法有效地控制采空区的地压活动,难以确保采矿工作面的安全,以及技术经济指标的不断改善。为此,经过近两年的实践,将原用采矿法改为壁式崩落留柱法,效果较好。 In the early stage of Pfu phosphorite production, for the gently sloping thin ore body with unstable roof, single-layer longwall caving mining was adopted. Practice shows that the mining method can not effectively control the underground pressure in goaf under the conditions of geology and mining technology in my mine, it is difficult to ensure the safety of mining face and the continuous improvement of technical and economic indicators. To this end, after nearly two years of practice, the original mining method to wall collapse stay column method, the effect is better.