Siudv On Floor Heave Mechanics And Bolting Technology For Roadways With Depth Of More Than One Kilometer And High Stress

In accordance with the situation that characteristics of adjacent rock largedeformation, two-ribs asymmetry deformation and severe floor heave of roadwayswith depth of more than one kilometer and high stress, and in the engineeringbackground of Xin-wen Hua-feng coal mine, methods of field monitoring, laboratorytest, theoretical analysis, numerical simulation, and underground test are adopted toproceed systematically research. Adjacent rock of roadways with depth of more thanone kilometer and high stress is divided into several regions, rock mass structuremechanical models of each region are established, deforming formula anddestruction criteria of each region structure rock mass are deduced, and adjacent rockstructural rock mass each region is an interacting uniform body of roadways withdepth of more than one kilometer. When roof and ribs are supported, it must becontrolled to floor heave. Type of stress floor heave is mostly in roadways withdepth of more than one kilometer and high stress, and structural deformation accountfor vast majority, method of whole section prestressed anchor grouting reinforcementto control roadway deforming is put forward, and roadway adjacent as a whole to bea strong force supporting body is madden. Resin anchoring agent has beensuccessfully applied to backplane anchor cable anchorage, speed of floor anchorwire installation is increased, and rapid construction of pretensioned anchor wire andgrouping are realized. Floor drilling pump suction reverse circulation drilling tooland complete construct technology are developed, and problems in the process offloor anchoring-hole drilling are solved. The research results are applied in practice,and adjacent rock control problems of roadways with depth of more than onekilometer and high stress are solved.