Roadside support method of short-distance coal seam roadway

Abstract

The invention discloses a roadside support method of a short-distance coal seam roadway. The short distance coal seam roadway includes the steps of firstly, determining the basic mechanical parameters of surrounding rock; secondly, determining the excavation volume of two sides of the roadway; thirdly, excavating the roadway, to be more specific, excavating according to the excavation volume of the two sides of the roadway; fourthly, determining a roadside support structure which comprises a plurality of roadside support units and a plurality of grouting anchoring rods, wherein the roadside support units and the grouting anchoring rods are arranged in a staggered manner; fifthly, performing roadside surrounding rock support construction; sixthly, excavating the next section and performing roadside surrounding rock support construction; seventhly, repeating the sixth step until all the short-distance coal seam roadway is excavated and the roadside surrounding rock support construction is completed. The roadside support method has the advantages that the method is simple in steps, reasonable in design, convenient to implement and good in use effect, the reserved excavation volume of the two sides of the roadway is determined according to the surrounding rock deformation conditions of the short-distance lower coal seam roadway, and the grouting anchoring rods and the roadside support system are coordinated to achieve effective roadside support.

Description

technical field [0001] The invention belongs to the technical field of roadway construction, and in particular relates to a roadside support method for a roadway in a short-distance coal seam. Background technique [0002] In recent years, with the gradual depletion of medium-thick coal seam resources, the mining of short-distance thin coal seam groups (also known as short-distance coal seam mining) has become one of the inevitable trends in the development of coal resources today. It is generally considered that the distance between coal seams is very close, and the coal seam has significant mutual influence during mining; generally refers to the coal seam whose distance between coal seams is less than 30m. Due to the small distance between coal seams in close coal seams, affected by the concentrated pressure formed by the coal pillars left behind after mining the upper coal seam, the surrounding rock deformation is severe. The large amount of deformation of the side coal ...

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Problems solved by technology

[0003] From the above content, we can see that many achievements have been made in the research on the deformation and support of coal seam mining roadway under close distance, but they are all carried out by numerical simulation and on-site measurement, and are determined based on engineering analogy or construction experience. The excavation, support scheme and parameters are very random and blind

Due to the significant difference in the stress environment of the mining roadway under the short-distance goaf compared with that of the single coal seam roadway, the existing research results on the deformation and support of the single coal seam roadway are not applicable to the mining roadway under the short-distance goaf

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