本文選題：地下開(kāi)采多層礦床　切入點(diǎn)：安全開(kāi)采　出處：《武漢科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：多層排列礦床在開(kāi)采過(guò)程中，不同礦層的開(kāi)采均對(duì)其鄰近礦層形成應(yīng)力擾動(dòng)，原巖應(yīng)力場(chǎng)的多次擾動(dòng)給礦山安全開(kāi)采、地壓管理、采準(zhǔn)工程布置等帶來(lái)許多不利影響。 合理的階段高度、礦層回采順序是預(yù)防和降低多層礦床相鄰礦層間擾動(dòng)影響的有效途徑之一。通過(guò)對(duì)多層排列礦床相鄰礦層相互擾動(dòng)影響特征進(jìn)行分析，建立了安全開(kāi)采階段高度與礦層間距、巖石移動(dòng)角和礦層傾角等賦存因素之間的解析關(guān)系式，在此基礎(chǔ)上對(duì)礦層間距、巖石移動(dòng)角和礦層傾角進(jìn)行了單因素影響規(guī)律分析。先開(kāi)采上層礦體后采下層礦體時(shí)的安全開(kāi)采階段高度H隨礦層間距a、上層礦體下盤巖石移動(dòng)角γ1的增大而增大，，隨下盤礦層傾角α2的增大而減小。先開(kāi)采下層礦體后采上層礦體時(shí)的安全開(kāi)采階段高度h隨礦層間距a、上盤礦層傾角α1、下層礦體上盤巖石移動(dòng)角β2的增大而增大。通過(guò)對(duì)礦層間距、礦體傾角、巖石移動(dòng)角進(jìn)行多因素正交極差分析，安全開(kāi)采階段高度H各因素影響程度由高向低依次為下盤礦層傾角α2、礦層間距a、下盤巖石移動(dòng)角γ1，安全開(kāi)采階段高度h各因素影響程度由高向低依次為礦層間距a、上盤礦層傾角α1（上盤巖石移動(dòng)角β2）。 依據(jù)不同賦存條件下多層礦床安全開(kāi)采階段高度取值規(guī)律及特點(diǎn)，分類探討了不同賦存條件下多層礦床同時(shí)從上至下開(kāi)采、先開(kāi)采上層礦體后采下層礦體和先開(kāi)采下層礦體后采上層礦體時(shí)礦體分層、分段、階段開(kāi)采方式選擇及同階段相鄰兩礦層的安全回采順序，探討了適用于不同賦存條件下多層礦床安全開(kāi)采的采礦方法。研究基于多層礦床開(kāi)采時(shí)的相互擾動(dòng)建立了安全開(kāi)采階段高度與多層礦床賦存特征的關(guān)系式，為多層礦床的安全開(kāi)采提供了分析參考依據(jù)。
[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.

【學(xué)位授予單位】：武漢科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD802

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本文編號(hào)：1608834