Grouting treatment method for strip mining goaf
A goaf and grouting technology, which is applied in mining equipment, earth square drilling, filling, etc., can solve problems such as difficult to grasp the long-term stability of striped coal pillars, imperfect technology, and difficult governance, and achieve a good society and economic value, the number of drilling holes is small, and the effect of easy promotion
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[0024] Accompanying drawing is a kind of specific embodiment of the present invention.
[0025] The strip mining goaf grouting treatment method of the present invention comprises the following steps:
[0026] Step 1: Borehole 1 location and layout planning: within the control range of the determined strip goaf 2 (the width of the goaf is generally 40m~80m) on the surface, the designed borehole 1 is located at the distance between both sides of the goaf 2 12m from the coal wall, arranged in double rows; drill holes 1 are arranged in groups of two, the distance between two holes in a group is 30m, and the distance between groups is 60m. The arrangement of the above-mentioned boreholes 1 avoids the dangerous areas of insufficient collapse and natural accumulation on the side of the coal wall and the long-term vulnerability of the coal wall to the erosion of mined-out water, and focuses on protecting the coal pillar, strengthening the plastically damaged area of the coal pillar,...
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