金属矿山
金屬礦山
금속광산
METAL MINE
2015年
7期
21-24
,共4页
充填采矿%盘区矿柱%回采顺序%采场稳定性%数值模拟
充填採礦%盤區礦柱%迴採順序%採場穩定性%數值模擬
충전채광%반구광주%회채순서%채장은정성%수치모의
Filling mining%Panel pillar%Mining sequence%Stope stability%Numerical simulation
针对某金属矿长期处于大规模充填体下开采的现状，对-300 m各盘区回采期间的稳定性进行了数值模拟，分析不同方案的采场开采过程中顶板应力、位移等指标的变化规律，并综合分析比较了各方案的回采安全性与经济效益。分析结果表明：将E101采场作为永久性连续盘区时，回采至中期采场顶板处产生1．14 MPa的最大拉应力和75 mm的最大位移；开采后期采场顶板处产生2．30 MPa的最大拉应力和92 mm的最大位移；开采后期采场顶板的抗拉安全系数为1．53；整个顶板岩体稳定性较好，确定将E101作为盘区永久矿柱。根据盘区永久矿柱的位置，提出了4种盘区回采顺序，分析比较不同开采方案的顶板、直接顶板、矿壁及充填体稳定性，确定了从矿体中央连续永久盘区矿柱E101采场向两侧分盘区开采的回采顺序。
針對某金屬礦長期處于大規模充填體下開採的現狀，對-300 m各盤區迴採期間的穩定性進行瞭數值模擬，分析不同方案的採場開採過程中頂闆應力、位移等指標的變化規律，併綜閤分析比較瞭各方案的迴採安全性與經濟效益。分析結果錶明：將E101採場作為永久性連續盤區時，迴採至中期採場頂闆處產生1．14 MPa的最大拉應力和75 mm的最大位移；開採後期採場頂闆處產生2．30 MPa的最大拉應力和92 mm的最大位移；開採後期採場頂闆的抗拉安全繫數為1．53；整箇頂闆巖體穩定性較好，確定將E101作為盤區永久礦柱。根據盤區永久礦柱的位置，提齣瞭4種盤區迴採順序，分析比較不同開採方案的頂闆、直接頂闆、礦壁及充填體穩定性，確定瞭從礦體中央連續永久盤區礦柱E101採場嚮兩側分盤區開採的迴採順序。
침대모금속광장기처우대규모충전체하개채적현상，대-300 m각반구회채기간적은정성진행료수치모의，분석불동방안적채장개채과정중정판응력、위이등지표적변화규률，병종합분석비교료각방안적회채안전성여경제효익。분석결과표명：장E101채장작위영구성련속반구시，회채지중기채장정판처산생1．14 MPa적최대랍응력화75 mm적최대위이；개채후기채장정판처산생2．30 MPa적최대랍응력화92 mm적최대위이；개채후기채장정판적항랍안전계수위1．53；정개정판암체은정성교호，학정장E101작위반구영구광주。근거반구영구광주적위치，제출료4충반구회채순서，분석비교불동개채방안적정판、직접정판、광벽급충전체은정성，학정료종광체중앙련속영구반구광주E101채장향량측분반구개채적회채순서。
Based on the present mining situation that a metallic ore under the large-scale backfill body has been mined for a long period of time,numerical simulation on the stability of the stope during mining process at-300 m of each panel zone was made to analyze the changing rules of the roof stress,displacement and other indicators during mining process and compre-hensively compare the recovery safety and economic benefits of each program. The results show that:when E101 stope is con-sidered as a permanent consecutive penal pillar,the maximum tensile stress of 1. 14 MPa and maximum displacement of 75 mm are generated at roof in the middle period;the maximum tensile stress of 2. 30 MPa and maximum displacement of 92 mm are generated at the end of mining,meanwhile the roof tensile safety factor is 1. 53. The entire roof rock stability is good,so E101 panel is determined as the permanent pillar. According to the position of the permanent penal pillar, four panel stoping se-quences are proposed. After comparing the roof stability,immediate roof,wall and backfill of different mining plan,the mining sequence from the permanent pillar stopes E101ly extending to two side is determined.
