破碎矿体充填采矿法水压支柱护顶技术及其支护特性
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摘要
为了解决深井破碎矿体开采中的支护问题,在两步骤回采充填采矿法中采用水压支柱进行护顶。工业试验表明,第一次加压后水压支柱的初始支撑力为9.4~13.2 MPa,支柱工作阻力在前3d内减小较快,之后缓慢减小;支柱高度均随支护时间的延长而缓慢下降,3d后顶板相对稳定。结果显示,水压支柱技术能有效提高破碎矿体开采过程的采场稳定性。
To solve the supporting problems in mining of fractured deep ore-body,hydraulic props are introduced to support the stope roof in two-step backfill mining.The industrial trial results show that the initial supporting pressures of each prop are 10~14MPa after first pressure loading.The supporting resistances decrease dramatically before day 3and decrease gently afterwards.In addition,prop heights decrease gently in the time frame of supporting,and the stope roof tend to be relatively stable after 3days.The trial demonstrate that the roof support with hydraulic prop can effectively enhance the stope stability within the fractured ore-body during mining.
To solve the supporting problems in mining of fractured deep ore-body,hydraulic props are introduced to support the stope roof in two-step backfill mining.The industrial trial results show that the initial supporting pressures of each prop are 10~14MPa after first pressure loading.The supporting resistances decrease dramatically before day 3and decrease gently afterwards.In addition,prop heights decrease gently in the time frame of supporting,and the stope roof tend to be relatively stable after 3days.The trial demonstrate that the roof support with hydraulic prop can effectively enhance the stope stability within the fractured ore-body during mining.
引文
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[5]黄仁东,余健,戴兴国,等.金属矿缓倾斜薄矿脉深井开采临时支护新技术应用[J].中国矿业,2004,13(4):51-54.
[6]WANG X,YANG Z,FENG J,et al.Stress analysis and stability analysis on doubly-telescopic prop of hydraulic support[J].Engineering Failure Analysis,2013,32:274-282.
[7]王远高.会泽铅锌矿8号矿体岩体质量评价[J].采矿技术,2008,8(2):19-20.
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[2]余健,吴爱祥,彭炳根,等.快速让压水压支柱系统支护性能研究[J].黄金,1998(7):17-20.
[3]Juárez-Ferreras R,González-Nicieza C,Menéndez-Díaz A,et al.Measurement and analysis of the roof pressure on hydraulic props in longwall[J].International Journal of Coal Geology,2008,75(1):49-62.
[4]吴爱祥,韩斌,阳雨平,等.水压支柱支护特性及其在深井开采中的应用[J].中南工业大学学报,2002,33(6):563-566.
[5]黄仁东,余健,戴兴国,等.金属矿缓倾斜薄矿脉深井开采临时支护新技术应用[J].中国矿业,2004,13(4):51-54.
[6]WANG X,YANG Z,FENG J,et al.Stress analysis and stability analysis on doubly-telescopic prop of hydraulic support[J].Engineering Failure Analysis,2013,32:274-282.
[7]王远高.会泽铅锌矿8号矿体岩体质量评价[J].采矿技术,2008,8(2):19-20.
[8]吴广宇.单体液压支柱在会泽铅锌矿的应用研究[D].长沙:中南大学,2011.