• 论文
主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
上湾矿高强度开采地表裂缝发育规律实测研究
  • Title

    In-site surveying and study on development laws of surface cracks by high-intensity mining in Shangwan Mine

  • 作者

    戴华阳罗景程郭俊廷阎跃观张旺朱元昊

  • Author

    DAI Huayang LUO Jingcheng GUO Junting YAN Yueguan ZHANG Wang ZHU Yuanhao

  • 单位

    中国矿业大学(北京)地球科学与测绘工程学院,煤炭开采水资源保护与利用国家重点实验室

  • Organization
    College of Geoscience and Surveying Engineering,China University of Mining and Technology-Beijing State Key
    Laboratory of Groundwater Protection and Uilliation by Coal Mining
  • 摘要

    神东矿区上湾矿1-2煤层倾角小、厚度大、埋藏较浅、赋存稳定,采用宽工作面大采高综采技术,高强度开采对地表环境的影响也更加剧烈,为了掌握该矿地表裂缝发育规律,对12401工作面推进过程中切眼侧1 km范围观测区进行了地表裂缝实测研究。设计了地表裂缝分区分方向观测方案,采用手持GPS测量裂缝轨迹、钢尺测量裂缝宽度、铁钎测量裂缝深度。历时3个月,获得了回采工作面开切眼侧观测区的2303条裂缝的分布信息。研究结果表明:①分析确定了本矿地质采矿条件地表裂缝的拉伸、压缩、台阶、塌陷4种类型及其分区分布情况。②得出了地表裂缝的周期性发育规律和集中于采空区范围的分布规律,确定了裂缝分布主要参数。测得裂缝间距约10m,裂缝最大宽度0.7m,最大深度4~10m,最大长度298m,最大台阶高度0.45 m,切眼侧走向裂缝角76.0°,上山裂缝角86.0°,下山裂缝角84.7°。③在工作面沿走向推进过程中,地表周期性产生与推进方向垂直分布的主裂缝,经历“产生—扩展—收缩—稳定”约14d的发育过程,主裂缝宽度大于50mm,平均间距129m,相对于推进位置滞后角79.8°~87.1°。通过对上湾矿12401工作面开采地表裂缝的实测研究,为科学评价该矿地质采矿条件下地表采动损伤状况提供了依据。




  • Abstract
    In Shangwan Mine of Shendong Mining Area,coal seam occurrence is stable with small dip angle,large thickness smaller mining depth. With the adoption of wide working face and large-height fully-mechanized mining technology,the influence of high-intensity mining on surface environment is also more severe. Therefore, a high-intensity mining impact on the surface environment.In order to master the development rules of surface fractures under the geological and mining conditions of th is mine,the surface fractures in the observation area of 1 km on the side of the incision in the process of advancing the No. 12401 working face were measured. The obs ervation scheme of the surface cracks in different directions was designed. The trajectory of the cracks was measured by hand-held GPS ,the width of the cracks was m easured by steel ruler and the depth of the cracks was measured by iron rod. Three months later,the distribution information of 2 303 fractures in the observation area a t the side of the incisor was obtained. The results show that:①Four types of the surface fractures in the geological mining conditions of the mine,including stretching,c ompression,step and collapse ,and their zoning distribution,are analyzed and determined.②The periodic development rules of the surface fractures and the distributio n rules concentrated in the goaf range are obtained,and the main parameters of the fracture distribution are determined. The measured crack spacing is about 10 m,the maximum width of the crack is 0.7 m,the maximum depth is about4 ~ 10 m,the maximum length is 298 m,the maximum step height is0.45 m,the strike crack angle of th e side of the incision is 76.0° ,the up-dip crack angle is 86.0° ,and the down-dip crack angle is84.7°. ③During the process of advancing along the strike of the working fa ce,the main fractures that are distributed vertically with the direction of advancing occur periodically on the surface ,and they undergo a development process of " produ ction-expansion-compressionstability" for about 14 days. The width of the main fractures is greater than 50 mm,the spacing is about 129 m,and the lag angle is79.8° ~ 87.10. Based on the measured study of mining surface cracks in No. 12401 working face of Shangwan Mine,a basis for a scientific evaluation of surface mining damag e under the geological mining condition of the mine was provided.
  • 关键词

    ​高强度开采地表裂缝分布规律实测

  • KeyWords

    high-intensity mining; surface cracks; distribution law; field survey;

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