Solid and cement composite filling coal mining method

Abstract

The invention discloses a solid and cementing body composite filling coal mining method, and relates to the technical field of coal mining methods. The method comprises the steps that digging is conducted on a working face coal conveying lane, a material filling lane and a cutting hole; solid filing equipment is erected; a lane filling pipe and a working face filling pipe are paved; the lane filling pipe and the working face filling pipe are connected; a working face is propelled; pushing and dense filling are conducted on goaf solid materials; cementing body material filling is conducted in solid filling materials; the working face filling pipe is closed; solid-cementing body filling coal mining operation of the next cycle is conducted. The solid and cementing body composite filling coal mining method can overcome the defect that an overall push dense effect is poor in the solid filling coal mining method, the detect that paste material filling and high water material filling can not achieve effective roof contacting can be overcome, roof settling before filling is effectively made up, and the filling body and surrounding rock deformation is accurately controlled.

Description

technical field [0001] The invention relates to the technical field of coal mining methods, in particular to a solid and cemented body composite filling coal mining method. Background technique [0002] Coal accounts for about 65% of my country's total primary energy consumption. According to the composition of my country's proven energy reserves and the current energy consumption structure, coal will still be the most important energy source in my country in the foreseeable future. About 90% of my country's coal production is underground mining. Underground coal mining not only destroys the ecological environment of mining areas, damages surface buildings (structures), but also brings serious safety hazards. The fundamental way to solve these problems lies in the improvement of mining space. Reasonable handling. The filling method of coal mining can effectively release the "three downs" of coal pressing and improve the recovery rate of coal resources. At the same time, th...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a solid and cement composite filling coal mining method, which can avoid the disadvantage of poor overall pushing and compacting effect in the solid filling coal mining method, and can avoid filling and Filling with high-water materials can not be effectively connected to the roof, effectively making up for the sinking of the roof before filling and accurately controlling the deformation of the filling body and surrounding rock

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