Curtain grouting construction method for treating mined-out areas
A goaf treatment and curtain grouting technology, which is applied to mining equipment, earthwork drilling, filling, etc., can solve high safety requirements and achieve the effect of reducing raw material costs
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[0042] A construction method for treating curtain grouting in gobs, the method is composed of the following steps:
[0043] 1) Construction preparation before drilling, the preparation work is as follows:
[0044] 1-1) Construction platform: Channel steel or I-steel welding is used to form a construction platform with a large support surface, and it is connected with the overall bolt of the drilling rig frame to ensure the construction stability requirements during high mast operations.
[0045] 1-2) Drilling equipment configuration: The burial depth of coal mine goaf is generally large and the stratum is complex, so the rotary drilling rig or down-the-hole drilling rig with a power of more than 11KW and a torque of not less than 1110N.m is generally used for drilling.
[0046] 1-3) Drilling equipment: according to the different lithological characteristics of the overburden (loam layer, pebble layer, bedrock section, etc.) The drill pipes are selected according to the actual...
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