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我矿马槽滩矿区缓倾斜中厚磷矿床的形态较特殊,由成矿条件与倒转背斜构造所决定,形成正、反两层矿,倾角分别为8～23°和18～25°,厚度一般为7～12米,矿石中等稳固,f=8～13。正层矿直接顶为砂质白云岩,中稳至不够稳固,f=10～13;底板为花斑白云岩,有较大起伏的浸蚀面,与含磷层呈嵌入式平行不整合接触。反层矿顶底板岩石情况则与正层矿相反。面对矿体产状变化大,正层矿底板呈波状起伏(参见图1),反层矿顶板则形同驼峰突起,矿层尖灭、薄化和膨大比较常见,并受断裂破坏影响等不利因素,我矿经过近二十年来的探索实践,在努力做好生产地质勘探工作的基础上,遵循“因矿择法”原则,针对不同的矿体类型,选择应用浅孔房柱法、底盘漏斗采矿法或其变形方案,较好地
The moderately-inclined medium-thick phosphate deposit in the Mabantan Mining Area in our mine has a special shape determined by the metallogenic conditions and reversal anticline structure, forming the positive and negative strata mines with dip angles of 8-23 ° and 18-25 °, respectively , The thickness is generally 7 ~ 12 meters, medium stable ore, f = 8 ~ 13. The immediate top of the main strata is sandy sandy dolomite, which is stable enough to be stable, f = 10 ~ 13; the bottom plate is a plaque dolomite with a large undulating erosion surface, which is embedded and parallel unconformity with the phosphorus-bearing layer . The top rock of the anti-layer mine is opposite to that of the main rock. In the face of large changes in the orebody shape, the floor of the main strata is undulating (see Figure 1), and the top of the anti-layer strata is the same as the hump protuberance. The pinchout, thinning and swelling of the ore layer are more common and are adversely affected by the fracture damage Factors, I mine after nearly 20 years of exploration and practice, in efforts to do a good job on the basis of geological exploration, follow the “due to mining method” principle, for different types of ore bodies, choose to use shallow hole column method, chassis Funnel mining method or its variants, better