Study on pressure-relief effect and protection scope of long-distance lower protective seam mining based on similar physical simulation and PFC<sup>3D</sup>.

Sci Rep · 2026 · PMC13194712 · PMID 41933063

Europe PMC DOI

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closest p

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The sentences

an obvious trendno p-value reported

10 d,e), the high‐density regions show an obvious trend of transverse migration (0°–18°, 162°–198°, and 342°–360°).

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an increasing trendno p-value reported

13 , the expansion deformation rate curve exhibits an increasing trend from the coal seam boundary toward the center, with a maximum value of 19‰.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.

Study on pressure-relief effect and protection scope of long-distance lower protective seam mining based on similar physical simulation and PFC&lt;sup&gt;3D&lt;/sup&gt;.

The sentences

Study on pressure-relief effect and protection scope of long-distance lower protective seam mining based on similar physical simulation and PFC<sup>3D</sup>.