Fully mechanized caving face supporting top coal gas extraction system
A fully mechanized caving face and gas drainage technology, which is applied in the direction of gas discharge, mining equipment, earthwork drilling, etc., can solve the problems of long gas drainage time, drilling length limitation, production and excavation impact, and achieve economical and Significant social benefits, increased operating rate and output, and reduced gas overrun
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[0039] Such as figure 1 , figure 2 and image 3 As shown, the top-coal and gas extraction system of the present invention includes a hydraulic support, a top beam 1 is provided on the top of the hydraulic support, and a groove 7 is provided in the middle of the top beam 1 along the length direction. An overhead main pipe 2 is provided, and a drainage hole 3 communicating with the groove 7 is arranged on the top beam 1 , and the extraction hole 3 and the overhead main pipe 2 are connected through an overhead branch pipe 4 .
[0040] The top beam 1 can be made in one piece, or a reinforcing convex plate can be set on the left and right sides of the top beam 1, and a groove 7 with a width of about 300 mm and a depth of about 30 mm is formed between the upper surface of the top beam 1 and the two reinforcing convex plates. It plays the role of less air leakage in the extraction, and the concave area is a loose air-permeable area, and the extraction hole 3 is arranged at a certa...
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