双鸭山铁矿诱导冒落法试验研究
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摘要
针对双鸭山铁矿北区急倾斜破碎中厚矿体实际生产中存在的采准、切割工程难以形成,采场安全条件极差,损失、贫化大等问题,提出了切割巷+斜排炮孔拉槽、两端退采的诱导冒落法开采方案.给出了适合该类矿体的诱导工程参数,分析研究了其冒落进程、冒落块度,并预算了崩矿损失率、贫化率,依此在双鸭山铁矿S5采场进行试验.跟班标定表明,回采初期,回收率较高,冒落块度良好,与分析情况基本吻合;诱导区顶板冒透后,混岩率呈交替上升趋势变化,其现象与爆破块度及凿岩巷道位置有关.该法回收指标较好,可有效解决急倾斜破碎中厚矿体开采难题.
The cutting roadway,the broached groove of oblique blasthole and both ends retreat mining of the induced caving method was proposed due to difficult stope preparation and cutting engineering,poor stope safety conditions and high loss and dilution of the steeply inclined and fractured medium thick orebody in Shuangyashan iron mine. The suitable parameters to induce orebody caving were given. The caving process and the lumpiness of caving block were analyzed and the loss rate and dilution rate of caving ore were estimated based on the No.S5 stope in Shuangyashan iron mine. According to results of the regular shift recordings,the recovery rate was higher and the degree of the caving block was good in early recovery period,which was consistent with previous analyses. The rock mixing rate increased along with cycle changes after complete caving,and the phenomenon was associated with the position of the drilling of roadway and the lumpiness of blasting blocks. The recovery indexes of this method are good and the mining problems of the steeply inclined and fractured medium thick orebody can be effectively solved.
The cutting roadway,the broached groove of oblique blasthole and both ends retreat mining of the induced caving method was proposed due to difficult stope preparation and cutting engineering,poor stope safety conditions and high loss and dilution of the steeply inclined and fractured medium thick orebody in Shuangyashan iron mine. The suitable parameters to induce orebody caving were given. The caving process and the lumpiness of caving block were analyzed and the loss rate and dilution rate of caving ore were estimated based on the No.S5 stope in Shuangyashan iron mine. According to results of the regular shift recordings,the recovery rate was higher and the degree of the caving block was good in early recovery period,which was consistent with previous analyses. The rock mixing rate increased along with cycle changes after complete caving,and the phenomenon was associated with the position of the drilling of roadway and the lumpiness of blasting blocks. The recovery indexes of this method are good and the mining problems of the steeply inclined and fractured medium thick orebody can be effectively solved.
引文
[1]常帅.双鸭山铁矿北区采矿方法研究[D].沈阳:东北大学,2008.(Chang Shuai.The research of mining methods in north region of Shuangyashan iron mine[D].Shenyang:Northeastern University,2008.)
[2]Zhang Z X,Xu Y,Kulatilake P H S W,et al.Physical model test and numerical analysis on the behavior of stratified rock masses during underground excavation[J].International Journal of Rock Mechanics&Mining Sciences,2012,49(1):134-147.
[3]Wei X J,Gao M Z,Lyu Y C,et al.Evolution of a mining induced fracture netw ork in the overburden strata of an inclined coal seam[J].International Journal of Mining Science and Technology,2012,22(6):779-783.
[4]Ren F Y,Sow T A M,He R X,et al.Optimization and application of blasting parameters based on the“pushingw all”mechanism[J].International Journal of Minerals,2012,19(10):879-885.
[5]曹建立,任凤玉.诱导冒落法处理时采空区散体垫层的安全厚度[J].金属矿山,2013,43(3):45-48.(Cao Jian-li,Ren Feng-yu.Research of dispersions bedding’s safety thickness in processing deposits w ith induced caving[J].Metalmine,2013,43(3):45-48.)
[6]Shabanimashcool M,Li C C.Numerical modelling of longw all mining and stability analysis of the gates in a coal mine[J].International Journal of Rock Mechanics&Mining Sciences,2012,51:24-34.
[7]JiránkováE,PetroV,ancer J.The assessment of stress in an exploited rock mass based on the disturbance of the rigid overlying strata[J].International Journal of Rock Mechanics&Mining Science s,2012,50:77-82.
[8]Xu X L,Zhang N,Tian S C.Mining-induced movement properties and fissure time-space evolution law in overlying strata[J].International Journal of Mining Science and Technology,2012,22(6):817-820.
[9]曹建立,任凤玉,张晋军,等.分段卸压崩落法导流放矿实验研究[J].东北大学学报(自然科学版),2011,32(8):1186-1189.(Cao Jian-li,Ren Feng-yu,Zhang Jin-jun,et al.Experimental study on diversion draw ing by stress-relieve sublevel caving method[J].Journal of Northeastern University(Natural Science),2011,32(8):1186-1189.)
[10]Zhou C B,Yao Y K,Guo L W,et al.Numerical simulation of independent advance of ore breaking in the non-pillar sublevel caving method[J].Journal of China University of Mining and Technology,2007,17(2):295-300.
[2]Zhang Z X,Xu Y,Kulatilake P H S W,et al.Physical model test and numerical analysis on the behavior of stratified rock masses during underground excavation[J].International Journal of Rock Mechanics&Mining Sciences,2012,49(1):134-147.
[3]Wei X J,Gao M Z,Lyu Y C,et al.Evolution of a mining induced fracture netw ork in the overburden strata of an inclined coal seam[J].International Journal of Mining Science and Technology,2012,22(6):779-783.
[4]Ren F Y,Sow T A M,He R X,et al.Optimization and application of blasting parameters based on the“pushingw all”mechanism[J].International Journal of Minerals,2012,19(10):879-885.
[5]曹建立,任凤玉.诱导冒落法处理时采空区散体垫层的安全厚度[J].金属矿山,2013,43(3):45-48.(Cao Jian-li,Ren Feng-yu.Research of dispersions bedding’s safety thickness in processing deposits w ith induced caving[J].Metalmine,2013,43(3):45-48.)
[6]Shabanimashcool M,Li C C.Numerical modelling of longw all mining and stability analysis of the gates in a coal mine[J].International Journal of Rock Mechanics&Mining Sciences,2012,51:24-34.
[7]JiránkováE,PetroV,ancer J.The assessment of stress in an exploited rock mass based on the disturbance of the rigid overlying strata[J].International Journal of Rock Mechanics&Mining Science s,2012,50:77-82.
[8]Xu X L,Zhang N,Tian S C.Mining-induced movement properties and fissure time-space evolution law in overlying strata[J].International Journal of Mining Science and Technology,2012,22(6):817-820.
[9]曹建立,任凤玉,张晋军,等.分段卸压崩落法导流放矿实验研究[J].东北大学学报(自然科学版),2011,32(8):1186-1189.(Cao Jian-li,Ren Feng-yu,Zhang Jin-jun,et al.Experimental study on diversion draw ing by stress-relieve sublevel caving method[J].Journal of Northeastern University(Natural Science),2011,32(8):1186-1189.)
[10]Zhou C B,Yao Y K,Guo L W,et al.Numerical simulation of independent advance of ore breaking in the non-pillar sublevel caving method[J].Journal of China University of Mining and Technology,2007,17(2):295-300.
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