Abstract
 Modeling Flow Paths through Mine Tunnels Using Cost Path Analyses Track: Mining and Geosciences Author(s): Joseph Giacinto, Paul Petzrick, Leonard Rafalko For a proposed cement grout injection project, a model was developed using Spatial Analyst to estimate the path of grout along the slope of a mine tunnel floor network in an abandoned coal mine. The grout, consisting of coal combustion by-products (CCPs), would be injected through boreholes drilled into the mine voids to prevent and mitigate land subsidence. After the tunnels fill with grout, the grout dries and hardens providing previously missing structural support to prevent tunnel collapse and the resulting land subsidence above. The model was developed to better understand the required distribution of boreholes to stabilize land over a proposed technology business park. Given initial proposed injection points on the surface, the model offers an effective means to visualize the potential grout path through the mine tunnel network and efficiently adjust CCP injection points to fill mine voids and return otherwise uninhabitable land to productive use. Joseph Giacinto Envieomental Resources Management 200 harry truman suite 400 annapolis , MD 21401 US Phone: 410 266 0006 Fax: 410 266 8912 E-mail: joseph.giacinto@erm.com Paul Petzrick Maryland Power Plant Research Program Building B-3, Tawes State Office Bldg. Annapolis , MD 21401 US Phone: 1 410 260 8669 E-mail: PPETZRICK@dnr.state.md.us Leonard Rafalko ERM 200 Harry S Truman Parkway, Suite 400 Annapolis , MD 21401 US Phone: 410 266 0006 E-mail: lenny.rafalko@erm.com |
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