A Method for Reinforcement of Thin Coal Pillars between Multi-lane and Down-Trough Lanes

Abstract

The invention discloses a multi-lane along-groove inter-lane thin coal pillar reinforcing method comprises drilling on a coal pillar side of one lane, penetrating a coal pillar, penetrating in a rib material, then hanging meshes on two sides of the coal pillar, adding a steel belt, exerting pre-tightening force on the rib material, locking, integrally connecting the meshes and the steel belt, and exerting lateral pressure of the coal pillar. The multi-lane along-groove inter-lane thin coal pillar reinforcing method uses the rib material which directly penetrates in the coal pillar to lock and control the coal pillar, improves lateral restraint on the coal pillar, enables the coal pillar to be in a three-direction stress state, improves strength of the coal pillar and capability of counterbalance extracting influences, reduces the width of the coal pillar between lanes and waste of coal resources, is strong in practical applicability, and has strong popularization and application values.

Description

technical field [0001] The invention belongs to the technical field of reinforcement of thin coal pillars between lanes in multiple lanes along grooves, and in particular relates to a method for strengthening thin coal pillars in lanes along grooves in multiple lanes. Background technique [0002] When coal mines are mined underground, it is necessary to set up and down troughs on both sides of the coal mining face. For the setting of double-lane upward troughs and double-lane downward troughs, the two outer troughs (auxiliary return air trough, auxiliary transport trough After serving the coal mining of this working face, it also needs to serve the mining of its adjacent working face. After the mining of one working face is completed, its transportation chute will collapse and be scrapped, but its auxiliary transportation chute must be used as the slack of the other working face. slot used. Therefore, it is necessary to ensure the stability of the auxiliary transport chut...

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Problems solved by technology

[0003] The present invention provides a method for reinforcing thin coal pillars between lanes along troughs in multiple lanes, aiming to solve the problem of ensuring the auxiliary transport along troughs and auxiliary return air along troughs on the working face by increasing the width of coal pillars between two lanes at present. The stability of the working face during mining, but the wide coal pillar, more coal pressure, waste of coal resources, the roadway is located in the stress-increased area after mining, and maintenance is difficult

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