关键词: 淮南矿区, 强烈采动影响, 厚锚固层, 锚固梯度, 围岩控制

Abstract: In recent years, the Huainan mining area has gradually entered deep mining, and engineering and technical problems such as high rock stress, complex environment, weak and fractured rock, poor stability, and severe deformation have become increasingly prominent. The limitations of traditional support technologies are becoming increasingly apparent. Therefore, it is imperative to explore new tunnel rock control technologies and solve the technical problems of deep coal tunnel support. This article is based on the geological conditions of Pansan Mine in Huainan Mining Area. Theoretical analysis, numerical simulation, industrial experiments, on-site measurements, and other methods are used to conduct a systematic and in-depth study on the problem of controlling the surrounding rock of coal tunnels under the influence of deep strong mining. The characteristics of the surrounding rock of deep strong mining coal tunnels in Huainan Mining Area are analyzed, mainly including large burial depth, large changes in lithology, large tunnel sections, multiple composite roofs, and low coal strength, Based on the occurrence characteristics of surrounding rocks in coal tunnels in Huainan mining area, the technical difficulties in controlling deep strong mining coal tunnels were analyzed; In response to the technical difficulties in controlling the surrounding rock of the deep strong mining coal roadway in the Huainan mining area, an integrated collaborative control technology system of "stress optimization, surrounding rock modification, and anchoring reinforcement" has been established, and an innovative integrated surrounding rock control technology of "top cutting pressure relief, grouting reinforcement, and thick anchoring layer reinforcement" has been innovated; Industrial experiments were conducted on the 2121 (3) transportation channel. During the mining process of the tunnel, the maximum cumulative deformation of the two sides of the transportation channel was 436.6mm, and the maximum relative displacement of the bottom plate was about 390.1mm, which is less than 50% of the deformation under the original support method; The shallow rock layer of the 2121 (3) transportation trough roof has separation and crack development within the range of 1.5~1.8m. The integrity of the deep roof rock layer is good, and it has good bearing performance, which can effectively maintain the stability of the tunnel. This verifies that the technical system has good maintenance and control effects on the stability control of the surrounding rock of the deep strong dynamic pressure coal tunnel.