Coal seam floor aquifer water-preserved coal mining classification method

• Main Authors: GAO YING, ZHAO RUI, JIANG ZEQUAN, MA LIQIANG, QIN TIANTIAN, HUA ZHAOLAI, FAN LIMIN, JI RUIJUN, LI TAO
• Format: Patent
• Language: Chinese; English
• Published: 21.06.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; EARTH DRILLING; ELECTRIC DIGITAL DATA PROCESSING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; MINING OR QUARRYING; PHYSICS; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS; SHAFTS; TUNNELS

The invention discloses a coal seam floor aquifer water-preserved coal mining classification method which comprises the following steps: S1, exploring and drilling a floor aquifer on a coal mining working face, and measuring hydrological parameters and excretion parameters of the aquifer planned to be protected; s2, predicting a bottom plate water inflow value Q2 of the coal face; s3, the length A and the width B of the coal face are predicted, the coal face is divided into N units, N is one-bit rounding of A/B, and the water level drop depth S of the unit closest to the drainage point is obtained through simulation calculation with a hydrological numerical simulation method; s4, the post-mining water level Y2 of the coal face and the attenuation water inflow q of the coal mining drainage point are predicted, and S5, according to the comparison result of the post-mining water level Y2 and the drainage point weighted average elevation Y1 or the comparison result of the attenuation water inflow q of the coal mi