主运输大巷小倾角贯穿主斜井支护技术研究

Study on Support Technology for Mine Main Transportation Roadway Perforated Through Mine Main Inclined Shaft with Low Inclination Angle

为保证主运输大巷掘进过程中小倾角安全贯穿主斜井,采用现场分析和ABAQUS数值模拟的手段,对主运输大巷小倾角贯穿主斜井综合掘进与支护技术进行研究。结果表明:将主斜井与主运输大巷采取分段掘进与支护的措施,针对贯穿主斜井期间不同区段分别采取锚网(索)喷支护、工字钢支架和钢筋混凝土联合支护、高性能锚网架喷支护、高性能预应力螺纹钢锚杆、预应力锚索、金属网、钢筋托梁、底板梁复合支护等措施;并对主斜井不同区段分别采取预应力锚索预加固、底板梁与底板锚杆联合预加固、矿用工字钢支架进行加固、高性能锚网架喷预加固措施。该支护措施保证了主运输大巷安全掘进及主斜井围岩稳定,实现了主运输大巷顺利小倾角贯穿主斜井。

In order to ensure a mine main transportation roadway safely perforated through a mine main inclined shaft with a low inclination angle during the heading process,a site analysis and a ABAQUS numerical simulation means were applied to study on the comprehensive heading and support technology of the mine main transportation roadway perforated through a mine main inclined shaft with a low inclina-tion angle.The study results showed that the measures to divide the mine main inclined shaft and the mine main transportation roadway into different sections for heading and supporting.According to the mine main transportation roadway perforated through different section of the mine main inclined shaft,a bolt-steel mesh(anchor)-shotcreting support,H steel support and reinforced concrete combined support,high performance bolt-steel mesh-support-shotcreting support,high performance pre -stress thread steel bar bolt,pre -stress anchor,steel mesh,reinforced bar beam,floor beam complex support and other measures were individually conducted.In the different sections of the mine main inclined shaft,a pre-reinforcement with pre-stress anchors,pre-reinforcement combined with floor beam and floor bolt and mine H steel support were applied to the reinforcement and high performance bolt-steel mesh-support-shotcreting pre-reinforcement.The support measures could ensure a safety heading of the mine main transportation roadway and the surrounding rock stability of the mine main inclined shaft and could realize the mine main transportation roadway successfully perforated through the mine main inclined shaft with low inclined angle.