A gob-side retaining method for mining roadways suitable for thin and medium-thick coal seams
A technology for mining roadways and thick coal seams, which is applied to mining equipment, earthwork drilling, fillings, etc., can solve problems such as poor isolation of gobs, mismatched shrinkable performance, and insufficient support resistance, etc., to reduce roadway support. maintenance cost, increase coal recovery rate, and reduce the effect of coal pillar loss
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[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0017] like figure 1 As shown, the method for retaining roadway along the goaf of the mining roadway provided by the invention comprises the following steps:
[0018] 1) Using the floor rock 3 obtained undercover in the mining roadway 2 as raw material, with appropriate cement as the cement, build a flexible isolation body 4 next to the roadway near the goaf 6 side.
[0019] 2) Drill energy-concentrating blast holes on the hard old roof above the goaf 6. The blast holes are located outside the isolation body 4, and the roof on the side of the goaf 6 is blasted and cut down so that the overlying rock layer 8 forms a "masonry beam". "structure.
[0020] 3) After the separator 4 and the cut-off top plate 5 are stabilized, a layer of foaming agent 9 is sprayed on the surface of the separator 4 .
[0021] In a preferred embodiment, the undercover length...
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