废弃小窑掩埋井井筒探测及封堵技术探讨

A Discussion about the Shaft Detection and Plugging Technique for the Buried Shaft of Abandoned Small Coal Mine

废弃小窑由于长期荒废无人治理,井口被工业废渣及建筑垃圾等杂物充填、掩埋,导致井筒确切位置难以确定。若未对井筒有效回填封堵,在动载或地震等外力作用下,井壁可能出现破损,特别是冲积层段内出现损坏后,流砂将通过井壁溃入井下,导致井筒附近地基被淘空以致地表出现变形,给行人及周边建筑物带来极大的安全陷患。为此,通过分析废弃小窑井筒物理特性,针对性地提出了掩埋井井筒探测及封堵技术及思路。

Abandoned for a long term,the shaft heads of small coal mines are stuffed and buried by industrial waste and construction wastes,so it is difficult to find the exact location of the mine shaft. If not plugged and backfilled efficiently,walls of the pit will be damaged by the dynamic load or earthquake. Especially when the inner side of the drift bed is damaged,the quick sand will flow and burst into the mine,which would cause surface deformation resulted from scouring ground around the shaft. Thus,the hidden safety risks may emerge for the passerby and buildings around. By analyzing the physical character of the long-term abandoned small coal pit,the idea for shaft detection and plugging technique of the buried pit are proposed.