Tunneling and supporting method for roadway in soft filling body

Abstract

The invention discloses a tunneling and supporting method for a roadway in a soft filling body, roadway tunneling equipment is formed by refitting an excavator, an excavator bucket of the excavator is replaced by a milling cutter to serve as roadway non-explosive tunneling and excavation equipment, and roadway supporting equipment is composed of a movable supporting section, a movable supporting long pipe and a plurality of supporting standard knots. The movable support section is a temporary support of a tunneling face, the support standard section is a permanent support of a roadway, and the movable support long pipe is a temporary support of an empty roof area between the movable support section and the support standard section. According to the designed excavation and support step pitch, an excavator provided with a milling cutter is adopted to excavate the roadway in the soft filling body, excavation is stopped when the roadway is excavated forwards by one excavation and support step pitch, a carry-scraper is adopted to discharge slag, the roadway is supported, and excavation is continued after supporting is completed. The method has the advantages of safe tunneling operation, small disturbance damage to the filling body, high tunneling speed, high efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of roadway excavation in underground mines, and particularly relates to a method for excavating a roadway in a soft filling inner body. Background technique [0002] The backfill mining method has the advantages of safe mining operation, low mining loss rate and dilution rate, reduction of overburden and surface subsidence and deformation, reduction of tailings and waste rock and other mining and solid waste surface storage, etc., and has become the most mainstream and application. The widest range of mining methods. As the backfill mining method is used more and more widely in the field of underground mining and the frequency is getting higher and higher, with the increase of the backfill mining area and the progress of the backfill mining in many backfill mining mines, more and more mines in the operating area are The empty area is filled, and the upper and lower walls or the top and bottom of the ore bod...

AI Technical Summary

Problems solved by technology

[0003] Using the traditional drilling and blasting method for excavation, the explosion of explosives will generate a large amount of high-temperature and high-pressure gas, stress waves, and vibration shocks in an instant, which will often cause damage to the surrounding filling body. Protection operations bring new hidden dangers, and at the same time increase the amount of work

Compared with the traditional drilling and blasting method, the non-explosive mechanical excavation has obvious advantages in protecting the surrounding rock or filling body around the roadway, reducing the damage to the surrounding rock or filling body caused by manual excavation, controlling the quality of the section forming, and reducing the amount of support engineering. However, at present, the cantilever roadheader equipment used in non-explosive mechanical excavation often requires a one-time investment of 5 to 6 million. The initial investment is too huge. , limiting its promotion and application

[0004] In view of the above problems, it is necessary to invent a roadway excavation method in the soft filling body, which has solved the safety problem of roadway excavation in the weak filling body

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