摘要
斜井井筒是特殊的地下工程结构,直接连通地面和井下,承担着矿井运煤、运料、通风和行人的重要任务,是煤矿安全高效生产的一个重要环节。但斜井井筒围岩富水区分布一直是影响斜井稳定性的一个重要因素。基于此,为了探清小保当煤矿斜井井筒围岩富水区的分布情况,本文采用探地雷达探测的方法,分别对小保当一号煤矿和二号煤矿的主斜井井筒、副斜井井筒围岩富水区进行探测。首先,利用探地雷达稳定电流在不同介质下电流传播的差异性对斜井井筒进行探测。将探测到的雷达数据经过信号处理,得到细节较好且便于判断的剖面图。然后,通过剖面图大致圈定井壁后方围岩不良地质体的范围。随后与现场实测渗水区域进行对比分析,排除其他不良地质体(如地层交界处、围岩岩性变化交界处、壁后空区、断层和裂隙等地质构造),从而得到围岩潜在的富水区分布情况。实践表明,应用此方法判别井筒围岩富水区和实际钻孔勘探相比误差较小,能相对准确地得出富水区分布。本文研究可为煤矿井筒稳定性防护提供重要参考和有力支撑。
The inclined shaft,a special underground engineering structure,is directly connected to the surface and the underground.It is burdened with the important tasks of coal transportation,material transportation,ventilation and pedestrian passage in the mine,and constitutes an important link in the safe and efficient production of the coal mine.However,the distribution of water-rich areas in the surrounding rock of the inclined shaft has always been a significant factor influencing the stability of the inclined shaft.Based on this,in order to clarify the distribution of water-rich areas in the surrounding rock of the inclined shaft of Xiaobaodang Coal Mine,in this paper,the ground penetrating radar detection method is employed to detect the water-rich areas in the surrounding rock of the main inclined shaft and the auxiliary inclined shaft of Xiaobaodang No.1 Coal Mine and No.2 Coal Mine respectively.Firstly,the inclined shaft is detected by taking advantage of the difference in current propagation of the stable current of the ground penetrating radar in different media.The detected radar data are subjected to Mining Magazine,2024,33(7):226-233.signal processing to obtain profile diagrams with better details and easier judgment.Then,the range of unfavorable geological bodies in the surrounding rock behind the shaft wall is roughly delineated through the profile diagrams.Subsequently,a comparative analysis is conducted with the actually measured water seepage areas on the site to eliminate other unfavorable geological bodies(such as stratigraphic junction,surrounding rock lithology change junction,empty areas behind the wall,fault and fracture and other geological structures),thereby obtaining the potential distribution of water-rich areas in the surrounding rock.Practice indicates that the error of applying this method to distinguish the water-rich areas in the surrounding rock of the shaft is relatively small compared with the actual drilling exploration,and the distribution of water-rich areas can be obtained relati
作者
梁旭
LIANG Xu(Shaanxi Xiaobaodang Mining Co.,Ltd.,Shenmu 719300,China)
出处
《中国矿业》
北大核心
2024年第7期226-233,共8页
China Mining Magazine
基金
北京市自然科学基金项目资助(编号:8212032)
国家自然科学基金项目资助(编号:52104155,51904302)。
关键词
探地雷达
斜井稳定性
不良地质体
富水区
超前探测
ground penetrating radar
inclined shaft stability
unfavorable geological body
water-rich area
advanced detection
