Table 1 Case histories of groundwater inrush disaster treatment in mine tunnels via aggregate pouring in China
Coal mine | Time of accident occurrence | Groundwater resources and pathway | Pressure (MPa) | Flowrate (m3/h) | Time of aggregate pouring | Aggregate consumption (m3) | Cement grouts (× 103 kg) | Sealing effect (%) |
|---|---|---|---|---|---|---|---|---|
Longmen coal mine, Henan | 11 December 1994 | Cambrian karst aquifer, through a geologic structure | 3.0 | 2,200.0 | 20 June–22 August 1994 | 3100.5 | 757.0 | 97.1 |
Renlou coal mine, Anhui | 4 March 1996 | Ordovician karst collapsed column | 5.0 | 11,854.0–34,570.0 | 25 April–25 May 1996 | 129.9 | 15,032.0 | 85.0–90.0 |
Wucun coal mine, Henan | 15 November 1999 | Ordovician karst aquifer intersected by faults and collapsed column | N/A | 2,145.0, 2,378.0 (maximum) | 18 January to 10 March 2000 | 1,535.0 | 3,182.6 | 97.0–100.0 |
Dongpang coal mine, Hebei | 12 April 2003 | Ordovician karst collapsed column | 5.0 | 7,000.0 | 10 May–11 June 2003 | 42,837.0 | 26,396.0 | 98.7 |
Sanshuping coal mine, Shaanxi | 7 August 2011 | Ordovician karst aquifer | 3.0 | 8,000.0, 13,200.0 (maximum) | 15 October–9 November 2011 | 25,716.0 | 60,383.0 | 98.7 |
Taoyuan coal mine, Anhui | 2 February 2013 | Karst collapsed column | N/A | 30,000.0 | 24 February–16 May 2013 | N/A | 220,843.0 | 100.0 |
Panji coal mine No. 2, Anhui | 25 May 2017 | Ordovician karst collapsed column | N/A | 3,024.0 | 20 June–27 July 2017 | 21,141.0 | 15,349.0 | 100.0 |
Yiliang Mining Company, Yunnan | 2 March 2019 | Permian Maokou and Qixia Formation aquifers | N/A | 1,650.0 | 15 June–30 October 2019 | 3900.0 | 910.0 | 98.0 |