Construction method of walling and filling combined gob-side entry retaining wall body
It is a combination technology of retaining an empty entryway, which is applied in the direction of filling, earthwork drilling, safety devices, etc., and can solve problems such as inability to effectively control and timely cut off the direct roof, difficulty in timely and effective support of the roof, and poor applicability of formwork mining height changes. , to achieve the effect of avoiding spontaneous combustion of leftover coal, wide applicability, and small impact
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[0031] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0032] The construction method of the masonry filling combined type gob-side retaining wall of the present invention: firstly prefabricate concrete piers of standard size on the ground, transport the cured concrete piers to the underground construction site for standby; In the rear part, immediately behind the hydraulic support 12 of the mining face, dense pillars 10 with a row spacing of 800×300mm are erected to support the upper coal seam direct roof 3 and coal seam old roof 2, and under the common support of the adjacent coal body 13, the working 14 spaces are reserved in the mining roadway at the rear of the face. The dense pillars 10 are composed of a beam and four individual pillars 11 arranged on the beam; under the cover of the dense pillars 10, inside the two rows of individual pillars 11 close to the two sides of the dense pillars 10, concrete pie...
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