采矿与安全工程学报
採礦與安全工程學報
채광여안전공정학보
JOURNAL OF MINING AND SAFETY ENGINEERING
2013年
4期
573-577,582
,共6页
岩质坡体%参数敏感性%稳定性%安全系数变化率
巖質坡體%參數敏感性%穩定性%安全繫數變化率
암질파체%삼수민감성%은정성%안전계수변화솔
rock slop%parameter sensitivity%slop stability%change rate of safety coefficient
为了获得地下采矿对岩质坡体稳定性的影响规律,采用数值模拟方法,结合正交试验,分别就开采过程中煤层厚度、开采深度、采空区的面积、工作面与坡体的相对位置以及煤层倾角等因素变化对坡体稳定性的影响过程及其敏感性进行了分析。结果表明,采矿活动对坡体稳定性的影响随采空区面积和煤层厚度的增加而增加,随煤层倾角以及采空区与坡体距离增大而减小,开采深度对坡体稳定性的影响表现在先增加后降低,当深度在200~250 m 时开采对坡体稳定性的影响最大。在满足生产需求的条件下,控制采空区面积是减少开采对坡体稳定性影响的最有效手段。
為瞭穫得地下採礦對巖質坡體穩定性的影響規律,採用數值模擬方法,結閤正交試驗,分彆就開採過程中煤層厚度、開採深度、採空區的麵積、工作麵與坡體的相對位置以及煤層傾角等因素變化對坡體穩定性的影響過程及其敏感性進行瞭分析。結果錶明,採礦活動對坡體穩定性的影響隨採空區麵積和煤層厚度的增加而增加,隨煤層傾角以及採空區與坡體距離增大而減小,開採深度對坡體穩定性的影響錶現在先增加後降低,噹深度在200~250 m 時開採對坡體穩定性的影響最大。在滿足生產需求的條件下,控製採空區麵積是減少開採對坡體穩定性影響的最有效手段。
위료획득지하채광대암질파체은정성적영향규률,채용수치모의방법,결합정교시험,분별취개채과정중매층후도、개채심도、채공구적면적、공작면여파체적상대위치이급매층경각등인소변화대파체은정성적영향과정급기민감성진행료분석。결과표명,채광활동대파체은정성적영향수채공구면적화매층후도적증가이증가,수매층경각이급채공구여파체거리증대이감소,개채심도대파체은정성적영향표현재선증가후강저,당심도재200~250 m 시개채대파체은정성적영향최대。재만족생산수구적조건하,공제채공구면적시감소개채대파체은정성영향적최유효수단。
To obtain the influence of underground mining activity on rock slop stability, by using nu-merical simulation and orthogonal experiment, the influencing process of main factor changes ( e.g. coal seam thickness, mining depth, goaf size, relative position between coal face and slop, coal seam dip an-gle) on rock slop stability and the parameter sensitivities during mining process were analyzed in this paper. The results show that the influence degree of mining activity on rock slop stability increases with the increase of goaf size and coal seam thickness, and decreases with the increment of coal seam dip an-gle and relative position between coal face and slop. Meanwhile, the influence of mining depth on slop stability firstly increases, then decreases, while mining in the depth between 200~250m.most influence the slop stability. When meeting the production demands, the goaf size control is the best method to re-duce the influence of mining activity on rock slop stability.