基于角位移临界值的顶板裂隙带高度研究
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摘要
顶板导水裂隙带是煤层顶板水进入工作面的重要通道.根据工作面采空区的空间形态和超限应力、有限空间的特点,采用岩层角位移临界值为判据,得出了导水裂隙带高度计算公式,并且将理论计算值与任楼煤矿实测数据进行了对比,验证了该公式正确可靠.通过该公式分析表明:采高与导水裂隙带高度的线性相关、碎胀系数、角位移值临界值越小,导水裂隙带高度越大,其中采高和碎胀系数权重较大.
The fractured zone through which water flows is one of the important passages where roof crevice water enters the working face.The spatial pattern of the goaf and the characteristic overstress and limited space were used to formulate a criterion for deducing the height of this water-flow fractured zone.The criterion was based on the critical value of rock angular displacement.The formula is correct and reliable compared to measured data obtained from the Renlou coal mine.The formula shows that the height of the water-flow fractured zone is linearly related to the mining height,the coefficient of bulk,and the critical value of rock angular displacement.As these decrease the height of the water-flow fractured zone increases.The mining height and coefficient of bulk have more influence on the height of the fractured zone through which water flows.
The fractured zone through which water flows is one of the important passages where roof crevice water enters the working face.The spatial pattern of the goaf and the characteristic overstress and limited space were used to formulate a criterion for deducing the height of this water-flow fractured zone.The criterion was based on the critical value of rock angular displacement.The formula is correct and reliable compared to measured data obtained from the Renlou coal mine.The formula shows that the height of the water-flow fractured zone is linearly related to the mining height,the coefficient of bulk,and the critical value of rock angular displacement.As these decrease the height of the water-flow fractured zone increases.The mining height and coefficient of bulk have more influence on the height of the fractured zone through which water flows.
引文
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[2]宋振琪,蒋宇静.煤矿重大事故预测和控制的动力信息基础的研究[M].北京:煤炭工业出版社,2003:18-25.
[3]王边富.综放采场覆岩破坏高度的实测方法及应用[J].矿业安全与环保,2005,32(3):31-33.WANG Bian-fu.Actual method of failure height of o-verburden stratum in a fully mechanized caving stopeand its application[J].Mining Safety&Environmen-tal Protection,2005,32(3):31-33.
[4]汪华君.覆岩导水裂隙带高度的微地震(MS)监测研究[J].煤炭工程,2006(3):74-76.WANG Hua-jun.Research on micro seismic monito-ring and measuring at top level of water conductedcracking zone in overburden rock[J].Coal Engineer-ing,2006(3):74-76.
[5]张兴民.微地震技术在煤矿“两带”监测领域的研究与应用[J].煤炭学报,2000,25(4):334-338.ZHANG Xing-min.The research and application ofmicroseismic technology in mine fractured and cavingzones monitoring[J].Journal of China Coal Society,2000,25(4):334-338.
[6]程学丰.煤层采后围岩破坏规律的声波CT探测[J].煤炭学报,2001,26(2):34-36.CHENG Xue-feng.Sound-wave CT detection for fail-ure patterns of surrounding rock after mining[J].Journal of China Coal Society,2001,26(2):34-36.
[7]刘盛东.高密度电阻率法观测煤层上覆岩层破坏[J].煤炭科学技术,2001,29(4):41-46.LIU Sheng-dong.High density electric resistancemethod applied to monitor and measure overburdenfailure above seam[J].Coal Science and Technolo-gy,2001,29(4):41-46.
[8]国家煤炭工业局.建筑物、水体、铁路及主要井巷煤柱留设与压煤开采规程[M].北京:煤炭工业出版社,2000:225-235.
[9]施龙青.华丰井田4煤层顶板砾岩水突出影响因素分析[J].中国矿业大学学报,2010,39(1):26-31.SHI Long-qing.An analysis of factors effecting wa-ter inrush from the number 4 coal seam roof conglom-erate in the Huafeng coal mine sctual[J].Journal ofChina University of Mining&Technology,2010,39(1):26-31.
[10]黄炳香.采动覆岩破断裂隙的贯通度研究[J].中国矿业大学学报,2010,39(1):45-49.HUANG Bing-xiang.Research on through degreeof overlying strata fracture fissure induced by min-ing[J].Journal of China University of Mining&Technology,2010,39(1):45-49.
[11]XU Jin-peng,SUI Wang-hua.Study and applicationon utilizing angular displacement to monitor failureof coal seam floor[C]//GE Shi-rong.6thInterna-tional Conference on Mining Science and Technolo-gy,Amsterdam:Elsevier Ltd Publishing,2009.
[12]孙希奎.淄博矿区工作面底板稳定性规律及监控方法研究[D].北京:中国矿业大学资源与安全工程学院,2009.
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