摘要
回采顺序不同,其相邻矿层间的扰动影响差别很大,直接关系到矿床的安全开采。分析扰动影响高度对同阶段相邻矿层安全回采顺序的影响,当2层矿体同时从上至下开采、先开采上层矿后采下层矿和先开采下层矿后采上层矿时,探讨2矿层的超前关系及安全回采顺序。研究表明,不同赋存条件下的倾斜—急倾斜多层矿床都可以采用从上至下分层并行开采。在岩石移动角γ1为60°~75°、矿层倾角α2≤γ1＋5°、矿层间距a〉15 m或γ1为45°~60°、α2≤γ1＋25°、a〉20 m这2种赋存条件下,可以采用从上至下分段并行开采。在γ1为45°~60°、α2≤γ1＋10°、a〉5 m或γ1为45°~60°,α2≤γ1＋20°、a〉10 m这2种赋存条件下,2层矿体先开采上层矿后采下层矿,只能按分层或分段下向开采,上层矿开采最大可超于下层矿11个分层或1个分段;在γ1为60°~75°、α2≤γ1＋5°、a〉15m或γ1为45°~60°、α2≤γ1＋25°、a〉20 m这2种赋存条件下,层矿开采最大可超于上层矿6个分层或1个分段。研究结果可为多层矿床阶段内开采顺序提供定量参考依据。
Different mining sequence leads to the more difference of disturbance effect between adjacent seams,which directly relates to the safety of ore body mining. The impact of disturbance effect height on safe mining sequence between adjacent seams in the same stage was analyzed. The safe mining sequence and relationship in advance were discussed when two layers of ore body were mined from top to bottom at the same time or the lower ore was mined after the upper ore or the upper ore was mined after the lower ore. The study showed that tilt-steeply inclined multilayer ore body with different occurrence conditions can be mined in parallel layer by layer from top to bottom. The ore body can be mined in parallel piecewise from top to bottom when the rock movement angle（ γ1） is between 60° and 75° and ore body dip（ α2） meets α2≤γ1＋5° and the spacing of mine stratums（ a） meets a〉15 m or the rock movement angle（ γ1） is between 45° and 60° and ore body dip（ α2） meets α2≤γ1＋25° and the spacing of mine stratums（ a） meets a〉20 m. When the rock movement angle（ γ1） is between 45°and 60° and ore body dip（ α2）meets α2≤γ1＋10° and the spacing of mine stratums（ a） meets a〉5 m or the rock movement angle（ γ1） is between 45°and 60°and ore body dip（ α2） meets α2≤γ1＋20° and the spacing of mine stratums（ a） meets a〉10 m,the lower ore should be mined after the upper ore as layer or segment from top to bottom. The upper ore can be mined 11 layers or 1 sublevels ahead of the lower ore. When the rock movement angle（ γ1） is between 60° and 75° and ore body dip（ α2） meets α2≤γ1＋5° and the spacing of mine stratums（ a） meets a〉15 m or the rock movement angle（ γ1） is between 45° ~60° and ore body dip（ α2） meets α2≤γ1＋25° and the spacing of mine stratums（ a） meets a〉20 m,the lower ore can be mined 6 layers or 1 sublevel ahead of the upper ore. This study can provide quantitative reference basis for mining sequence of multilayer deposits in a stage.
出处
《金属矿山》
CAS
北大核心
2015年第7期11-15,共5页
Metal Mine
基金
国家自然科学基金项目(编号:51204127)
湖北省科技支撑计划项目(编号:2014BCB033)
关键词
多层矿床
安全回采顺序
阶段高度
岩石移动角
矿层倾角
矿层间距
Multilayer deposits
Safety mining sequence
Stage height
Rock movement angle
Ore body dip
Spacing of mine stratums
