Research on the Deformation Characteristics and Support Technology of a Bottom Gas Extraction Roadway under Repeated Interference

<div>Layout chart of displacement observation point. (a) The position relation between observation points and coal roadway and mining face. (b) Crossing method for observing surface displacement of bottom gas extraction roadway.</div>

Advances in Civil Engineering

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Figure 16

Figure 16: Research on the Deformation Characteristics and Support Technology of a Bottom Gas Extraction Roadway under Repeated Interference 