Construction technology of No.3 rescue borehole in Hushan mine disaster， Shandong province

Abstract:

At 2 pm. on January 10，2021， an explosion occurred at 240m underground of Hushan gold mine of Shandong Wucailong Investment Co.， Ltd. in Qixia City， Yantai， Shandong， resulting in 22 workers trapped underground. The Accident Emergency Rescue Headquarters deployed four rescue boreholes in the first batch. The 6th Geological Brigade of Shandong Bureau of Geology and Mineral Exploration and Development undertook the construction task of No.3 rescue hole. The construction scheme of “DTH hammer drilling+high-precision inclinometer+casing wall protection and water stop” was adopted to quickly drill to 521m. Then， cooperate with the national mine emergency rescue geodetic survey team to complete the remaining 60m construction task by using directional drilling technology. The first one penetrated the roadway and received a response from the trapped miners underground. This successful rescue has created a new model of relay drilling rescue and provided reference ideas for mine rescue work.