Gob-side entry retaining adjoining rock stabilizing method based on lateral rock formation pre-splitting control
A stabilizing method and technology of retaining entry, which is applied in earthwork drilling, ground mining, mining equipment, etc., and can solve problems such as shortening the action time of surrounding rock in entry entry
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[0034] The present invention will be further explained below in conjunction with the accompanying drawings.
[0035] exist figure 1 , 2 In the production system shown in . On the coal seam 1 is the direct top 5, and the uppermost layer of the production system is the old top 10.
[0036] This embodiment relates to a method for fully unloading the roof of the gob-side entry retaining, which can pre-crack the roof stratum to ensure that it breaks outside the wall, so that the old roof strata outside the wall can be loosened and pre-cracked, which can improve the overlying strata of the gob-side entry retaining The movement form can slow down the supporting pressure of surrounding rock in gob-side entry retaining, and shorten the time of mining stress action. The steps of this method are as follows:
[0037] (1) 50-100m ahead of the working face, and construct a drilling field 9 in the side coal wall of the mining side of the roadway;
[0038] (2) Construction of group I dri...
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