关键词: 深基岩冻结井筒, 冻结孔涌水, 环状导水通道, 涌水机理, 环形截水巷

Abstract: Against the frozen hole in-rushing water hazards technical problems of deep freezing bedrock shaft in west area of china，based on the analysis of frozen tube annular water-transmitting channels formation and in-rushing water mechanism，a new technology to control deep freezing bedrock shaft frozen hole in-rushing water disasters thoroughly is innovatively presented which drives small section annular roadway in the stability rock stratum outside the frozen wall below the upper aquifer，probe and expose the frozen tube and then seal frozen hole in the annular roadway，concrete backfill in the annular roadway to form a annular confining bed，and cut off the annular water-transmitting channels thoroughly.Taking the shaft frozen hole in-rushing water disasters control project of Hujiahe coal mine for example，such means as theoretical analysis，field investigation，numerical simulation，field monitoring are applied to study the key parameters about reasonable rock stratum of annular roadway，the reasonable distance from shaft wall，section of roadway，mode of drive and support.The probing techniques of ground penetrating radar，electrical detection and pipe line locator are adopted to probe the position of frozen tube.The formation and subsidence monitor results indicated that the surrounding rock of roadway was stability.Engineering practice verified that the technique could control the frozen hole in-rushing water of deep freezing bedrock shaft thoroughly.

Key words: Deep freezing bedrock shaft, Frozen hole in-rushing water, Annular water-transmitting channels, Mechanism of in-rushing water, Annular roadway