多层矿床安全开采阶段高度研究

发布时间：2018-03-14 00:35

本文选题：地下开采多层矿床　切入点：安全开采　出处：《武汉科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：多层排列矿床在开采过程中，不同矿层的开采均对其邻近矿层形成应力扰动，原岩应力场的多次扰动给矿山安全开采、地压管理、采准工程布置等带来许多不利影响。合理的阶段高度、矿层回采顺序是预防和降低多层矿床相邻矿层间扰动影响的有效途径之一。通过对多层排列矿床相邻矿层相互扰动影响特征进行分析，建立了安全开采阶段高度与矿层间距、岩石移动角和矿层倾角等赋存因素之间的解析关系式，在此基础上对矿层间距、岩石移动角和矿层倾角进行了单因素影响规律分析。先开采上层矿体后采下层矿体时的安全开采阶段高度H随矿层间距a、上层矿体下盘岩石移动角γ1的增大而增大，，随下盘矿层倾角α2的增大而减小。先开采下层矿体后采上层矿体时的安全开采阶段高度h随矿层间距a、上盘矿层倾角α1、下层矿体上盘岩石移动角β2的增大而增大。通过对矿层间距、矿体倾角、岩石移动角进行多因素正交极差分析，安全开采阶段高度H各因素影响程度由高向低依次为下盘矿层倾角α2、矿层间距a、下盘岩石移动角γ1，安全开采阶段高度h各因素影响程度由高向低依次为矿层间距a、上盘矿层倾角α1（上盘岩石移动角β2）。依据不同赋存条件下多层矿床安全开采阶段高度取值规律及特点，分类探讨了不同赋存条件下多层矿床同时从上至下开采、先开采上层矿体后采下层矿体和先开采下层矿体后采上层矿体时矿体分层、分段、阶段开采方式选择及同阶段相邻两矿层的安全回采顺序，探讨了适用于不同赋存条件下多层矿床安全开采的采矿方法。研究基于多层矿床开采时的相互扰动建立了安全开采阶段高度与多层矿床赋存特征的关系式，为多层矿床的安全开采提供了分析参考依据。
[Abstract]:In the process of mining, the exploitation of different strata is the stress disturbance to the adjacent strata. The multiple disturbances of the original rock stress field bring many adverse effects to the mining safety, the ground pressure management and the layout of the project.
Reasonable stage height, seam mining sequence is one of the effective ways to prevent and reduce the impact of disturbance between adjacent ore deposit layers. The multilayer arrangement of adjacent seam deposit mutual disturbance characteristics analysis, established the safety mining stage height and layer spacing, analytical relation between rock moving angle and angle seam occurrence factors. On the basis of the seam spacing, rock seam dip angle and movement are analyzed influence of single factor. The safety mining stage height H upper orebody mining exploitation first after Lower Orebody with seam spacing a, upper footwall rock movement angle increases with the increase of 1, with lower seam and decreased with the increase of angle 2 the first stage of safety mining. Mining of lower orebody mining after the upper orebody height h with seam spacing a, upper seam dip angle of 1, the lower hanging rock orebody movement angle beta 2 increase Large increases. The seam dip angle of orebody, spacing, multi factor analysis of the orthogonal experiment of rock movement angle, the impact of various factors of safety mining height of H from high to low in turn angle seam footwall 2, seam spacing a, footwall rock movement angle gamma 1, influence degree of various factors by mining stage height h high to low seam spacing a, upper seam dip angle of 1 (on the rock movement angle of 2).
According to the existing conditions of multilayer deposit safety mining stage height value rules and characteristics, classification of different occurrence conditions and multilayer deposits from top to bottom to upper orebody mining, mining and mining after lower orebody mining of Lower Orebody mined first upper orebody ore layer, sub stage mining method selection and adjacent to the same stage two seam safe stoping sequence, discusses the method for mining safety mining deposits in different conditions of multi layered mining. The research on the relationship between the mutual disturbance of established safety mining and multi stage height based on the characteristics of ore deposit, provides the analysis reference for safe mining of multilayer deposits.

【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD802

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