Roadside gangue mixture filling and gob-side entry retaining method for large-dip angle coal seams
A technology of large inclination and empty entry retaining, applied in filling, earthwork drilling, safety devices, etc., can solve problems such as high labor intensity and deformation of fence nets, and achieve good effects, small repairs, and good safety.
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[0017] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0018] The specific steps of the method for filling gob-side entry retention with gangue beside a large-inclination coal seam entry according to the present invention are as follows:
[0019] a. First, foam cement, suspending agent, thickener, and water are prepared on the ground in a mass ratio of 3:1:0.7:9 to form a coagulation slurry, and then the coagulation slurry is packed into a filling bag and sealed, then used The mine car is transported to the underground until it is standby in the section mining roadway 6;
[0020] b. When working on the working face, as the hydraulic support 5 of the mining face is pushed forward by a cut depth of 0.8m, a roadway blocking gangue support support 1 is erected at the side of the mining roadway at the back of the mining face near the goaf, The center distance is 0.8m, and I-shaped steel anti-fall and anti-skid pill...
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