跨采动压大变形巷道缓冲层支护技术研究

Research on Support Technology for Soft Roadway with Multiple Span Mining

随着矿井开采条件日趋复杂,巷道围岩变形控制越来越困难,严重制约着矿井的高产、高效。针对东滩煤矿跨采动压大变形巷道围岩地质条件,提出了一种新的锚网喷-缓冲层-U形钢联合支护方案及其配套施工方法。现场实践与测试表明:采用本支护方案后,围岩变形最大值达到30 mm,而后变形逐渐趋于稳定,且整体稳定性好,能够满足生产和安全需要,对类似条件下的巷道支护有一定的推广应用价值。

With the growing complexity of mining conditions, roadway deformation control more difficult, which is seriously restricting the efficient development of the mine. Based on the geological conditions of Dongtan mining for the large deformation dynamic pressure roadway, an anchor spray-buffer layer-U steel joint support programs and supporting construction method were proposed. Field tests show that with this support scheme, surrounding rock deformation reaches a maximum 30 mm,then the deformation gradually stabilized, and it has good overall stability, can meet the security and production needs of the roadway, which have certain application value under similar conditions.