摘要
程潮铁矿的矿体随着开采深度的增加而逐渐西移,导致选矿车间下保安矿柱所占矿量不断增多,故拟采用联合开采方法回收-430^-500m阶段矿体:充填法回收选矿车间下预留保安矿柱;无底柱分段崩落法开采保安矿柱以外的其他矿体。为了研究联合开采时回采顺序对地表稳定性的影响,采用数值模拟方法得到不同回采顺序下地表监测点的垂直位移,确定地表沉降最小且施工组织容易的回采顺序组合为最优方案,即充填法采用"中-左-右"以及无底柱分段崩落法采用"左-右-中"的回采顺序。模拟开采结果表明,在该回采顺序方案下,选矿车间区域的地表稳定性、充填采场及隔离矿柱的安全性均满足要求。
The location of ore body in Chengchao Iron Mine moves westward gradually with the in-crease of mining depth,which results in the ever-increasing ore quantities reserved for safety pillars under the dressing plant.So it is planned to stope the ore body ranging from -430^-500 m using combined mining:safety pillars under the dressing plant are recycled by filling method and the other ore body in the same district stoped by non-pillar sublevel caving method.To study the influence of combined mining sequence on the ground surface stability,the vertical displacement values of surface monitoring points are obtained by numerical simulation in different stoping sequences.The scheme causing the minimum ground settlement and being convenient for construction organization is chosen as the best one,i.e.,stoping sequences of filling and non-pillar sublevel caving methods are “middle→left→right”and “left→right→middle”,respectively.Simulation results show that,in the best sto-ping sequence,both the stability of ground surface around the dressing plant and the safety of filling stope and partition pillars meet the requirements.
出处
《武汉科技大学学报》
CAS
北大核心
2016年第2期107-111,共5页
Journal of Wuhan University of Science and Technology
关键词
回采顺序
联合开采
采场稳定性
地表沉降
数值模拟
stoping sequence
combined mining
stope stability
ground surface settlement
numerical simulation
