隐伏煤矿岩溶区地面塌陷隐患探测技术  

Detection technology of hidden danger of ground collapse in karst area of concealed coal mine

作　　者：祝进兵 Zhu Jinbing(China Railway Wuhan Survey and Design Institute Co.,Ltd.,Wuhan 430000,China)

机构地区：[1]中铁武汉勘察设计院有限公司,湖北武汉430000

出　　处：《能源与环保》2023年第8期80-86,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：湖北省科技计划项目(2007B10201008)。

摘　　要：为提升隐伏煤矿岩溶区地面塌陷隐患综合探测效果,对隐伏煤矿岩溶区地面塌陷隐患综合探测进行研究。首先,归纳出的最大动模量随动应变衰减公式,确定土体模量衰减程度,采用微动法获取隐伏煤矿岩溶区地面体积模量和剪切模量的转换函数,采集地下特征频率与塌陷隐患覆盖间关系,确定塌陷隐患覆盖层厚度,并从波速形态确定塌陷隐患位置;根据电阻率异常波动结果确定软土层与溶洞的分布位置,根据高密度电阻率法获取隐伏煤矿岩溶区地面塌陷隐患位置,综合2种方法能够探测出隐伏煤矿岩溶区地面塌陷隐患。试验结果表明,该方法能够探测出研究区域中存在多个波速异常和电阻率值异常的区域,属于隐伏煤矿岩溶中塌陷隐患(岩溶发育、软土层和溶洞位置)。综合分析后,圈出易于出现塌陷的区域,针对该区域的情况,提出注浆法的改善治理措施。In order to improve the comprehensive detection effect of hidden danger of ground collapse in karst areas of concealed coal mines,this paper studied the comprehensive detection of hidden danger of ground collapse in karst areas of concealed coal mines.Firstly,the attenuation formula of the maximum dynamic modulus following the dynamic strain was summarized to determine the attenuation degree of the soil modulus attenuation.The micro motion method was used to obtain the conversion function of the ground bulk modulus and shear modulus in karst area of concealed coal mine,collect the relationship between the underground characteristic frequency and the cover of the potential collapse hazard,determine the thickness of the cover layer of the potential collapse hazard,and determine the location of the potential collapse hazard from the wave velocity form.The distribution position of soft soil layer and karst cave was determined according to the abnormal fluctuation results of resistivity,and the the location of hidden ground collapse hazards in karst areas of concealed coal mines was obtained according to high-density resistivity method,the hidden danger of ground collapse in karst area of concealed coal mine can be detected by combining the two methods.The experimental results indicate that this method can detect multiple areas with abnormal wave velocity and resistivity values in the study area,which belongs to the hidden danger of collapse in karst areas of concealed coal mines(karst development,soft soil layers,and cave locations).After comprehensive analysis,circle the areas prone to collapse,and propose improvement and control measures for the grouting method based on the situation of the area.

关 键 词：隐伏煤矿岩溶区 地面塌陷隐患 综合探测 微动法 高密度 电阻率法 

分 类 号：P642.5[天文地球—工程地质学]