Fractured rock mass roadway combined active and passive support method

Abstract

The invention discloses a fractured rock mass roadway combined active and passive support method. The fractured rock mass roadway combined active and passive support method comprises the steps that the mine rock joint fissure fracture development condition is observed on site, the thickness of concrete is determined, and a drilling position of an anchor rod hole is arranged and marked; according to a calculation result, peripheral anchor rod holes are drilled, resin anchor rods are fixed into the anchor rod holes through an anchoring agent, the depth of anchor rods entering mine rock is 2-3m,and the anchor rods exposes from the surface of a roadway by 0.5-1m; steel wire meshes are inserted to exposed rod bodies of the anchor rods from being closely attached to the mine rock every other 0.1-0.2m in a penetrating mode, and at least more than two layer of steel wire meshes are formed; steel plates are fixed to anchor rod positions of the outer layers of the steel wire meshes from bottomto top, and meanwhile, geotechnical cloth is laid on the inner surfaces of the steel plates; during construction, the steel plates are fixed while the concrete is poured in surrounding space of the steel plates layer by layer until construction of a whole roadway cross section is completed; and the steel plates are connected and reinforced through steel bars between the longitudinal direction andthe transverse direction. The fractured rock mass roadway combined active and passive support method is simple in process, high in safety, and saved in engineering materials.

Description

technical field [0001] The invention relates to the technical field of underground mining engineering, and more particularly, to a combined active and passive support method for broken rock roadway suitable for broken rock roadway support. Background technique [0002] In the underground mining of metal mines, roadway engineering is the main engineering structure of the mine. Therefore, the underground roadway controls the economic lifeline of the entire mining enterprise, and good roadway quality is a favorable condition to ensure the economic benefits of the mine. At present, in mines with extremely developed joints and fissures, due to the poor quality of rock mass, the phenomenon of slats and roofs falling over in the roadway is easy to occur, which affects the normal production of the mine. [0003] At present, in view of the development of joints and fissures, layered and broken rock mass, mainly steel arches, bolts (cables), concrete prefabricated parts and other str...

AI Technical Summary

Problems solved by technology

There are generally disadvantages such as long construction period, high cost, and high labo

Images