Technology and method of mining support along gob-side entry retaining

Abstract

A mining support method for gob-side entry retaining, including the first step, reinforcement of mining entry retaining or reinforcement of excavation retaining entry; second step, advance support of side ends of entry retaining in mining face The advance support method is the same during mining, and the advance support adopts a beam and a single hydraulic prop. The differences are as follows: First, the advance support length is 5 meters longer than the length required by the regulations when the roadway is retained, that is, during normal mining. 25 meters, and 30 meters when retaining roadway mining; the second is that the one-shaped beam is changed from the original vertical direction to the horizontal direction, that is, the original direction along the roadway is changed to the direction along the working face; the third step, the mining face 1# ‑3# double net support on the top of the frame; the fourth step is to retain the roadway support; the fifth step is to form a natural false side on the goaf side of the roadway; , the falling gangue naturally rolls down on end 1 # -3 # The diamond-shaped net behind the frame falls naturally under the weight of the overlying rock.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a mining support method for gob-side entry retaining. Background technique [0002] For gobside entry retention, currently there are high water and ultra-high water filling, concrete pouring, steel pipe concrete plus single anchor cable, masonry gangue bags, material stones, concrete blocks, metal shed plus monomer, support dense monomer plus Wooden piles and other entry retention techniques, but the above-mentioned entry retention techniques have shortcomings, among them, high water and ultra-high water filling, pouring concrete, steel pipe concrete plus single anchor cable, masonry gangue bag, material stone, concrete block entry retention technology , its disadvantages are: first, the operating environment is operated in the goaf behind the mining face, the operating safety ring is poor, and the safety factor is relatively low; second, it requires a large amount of labor; ...

AI Technical Summary

Problems solved by technology

[0002] For gob-side entry retention, currently there are high water and ultra-high water filling, pouring concrete, steel pipe concrete plus single anchor cable, masonry gangue bag, material stone, concrete block, metal shed plus monomer, support dense monomer plus Wooden stacks and other entry retaining technologies, but the above-mentioned entry retaining technologies have shortcomings. Among them, high water and ultra-high water filling, pouring concrete, steel pipe concrete plus single anchor cable, masonry gangue bags, material stones, and concrete block entry retaining technologies , its disadvantages are: first, the operating environment is operated in the goaf behind the mining face, the operating safety environment is poor, and the safety factor is relatively low; second, it requires a large amount of labor; is relatively high cost

[0003] In addition, high-water and ultra-high-water filling and pouring concrete filling technology have other disadvantages. First, the roof of the filling operation area needs to be supported and reinforced; second, modeling is required; third, filling equipment is required; fourth, Affect the recovery output, the process is complicated

Concrete-filled steel tube + single anchor cable + gangue bag, masonry gangue bag, material stone, and concrete block roadway retaining technology have the following disadvantages: labor-intensive workers and many transportation links

The disadvantages of lane retention technologies such as metal sheds plus monomers, densely supported monomers and wooden stacks are: the amount of monomers and wood used is large, the amount of damage to monomers and sheds is large, the amount of roadway maintenance and repairs in the later period is large, and the recovery of sheds is complex. The utilization rate is low, and plastic treatment is required, and the sealing effect on the goaf is not good

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