Under　the　engineering　background　of　the　First　Mine　of　Yili　in　Xinjiang　Municipality,　the　physical　model　test　was　designed　and　the　method　of　failure　mechanism　of　the　surrounding　rock　of　oblique　laneway　in　thick　gravel　stratum　with　water　was　found.　The　test　simulation　of　the　failure　process　of　the　surrounding　rock　under　progressive　load　and　seepage　condition　was　carried　out　successfully.　Finally　the　model　test　results　of　the　progressive　failure　process　of　the　surrounding　rock　under　seepage,　the　laws　of　the　stress　of　surrounding　rock　and　the　pressure　of　the　bracket　and　their　displacement　during　the　collapse　were　analyzed.　The　results　show　that　roof　separation　phenomenon　of　thick　gravel　bed　is　evident　under　the　condition　of　uncoupled　support　and　seepage.　Subsidence　of　roof　surrounding　rock　is　bigger　than　roadways　sides.　The　loading　on　supports　increases　obviously,　meanwhile　because　of　the　decreased　tolerance　of　surrounding　rock　and　then　the　intension　turns　to　be　lower　significantly,　the　supports　pressure　increases　soon,　the　supports　instability　easily.　The　pressure　of　the　soil　on　roof　has　the　most　obvious　and　biggest　change　under　gradually　loading,　followed　with　the　two　sides.