A method for judging the feasibility of residual coal mining in the middle of compound residual mining area
A discrimination method and technology for residual mining areas, applied in data processing applications, instruments, calculations, etc., can solve the problem of no systematic report on the recoverability evaluation of residual coal in composite residual mining areas, achieve huge market economic benefits, and be easy to master and apply. , the effect of creating market economic benefits
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[0029] In the early coal recovery process, due to the limitation of geological conditions and mining equipment, many mining methods such as caving method and knife column method were adopted, so a large number of "upper knife column-bottom caving" composite residual mining areas were formed. Whether the residual coal in the central part of the residual mining area can be safely mined mainly depends on the distance between coal seams and the damage range caused by mining the upper and lower coal seams. Specific steps are as follows:
[0030] Step 1: Carry out drilling and coring in combination with the geological columnar map of the mining area, clarify the composition of the rock formations between the upper and lower coal seams in the composite residual mining area, and carry out unified labeling. Generally, the rock formations of different layers are layered with natural layers boundaries.
[0031] The second step: Combined with the basic theory of elastoplasticity, the max...
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