Elk Creek Geotechnical Program Agapito Associates, Inc. (AAI) has been involved in long-term geotechnical investigation and design at the Oxbow Mining, LLC, Elk Creek Mine, dating back to the pre-development phase. Services provided by AAI include horizontal stress measurement, numerical modeling of seam interaction, rock mechanics testing, and mine-wide roof and floor characterization. Future mining involves [...]
Overcoring Stress Determinations
Instrumentation Installation The field work at the Kimballton Mine in Ripplemeade, Virginia, includes NX sample coring of the roof and floor of the 15E level of the mine, USBM-method overcore stress measurements, and installation of Geokon mupltiple-position borehole extensometers (MPBXs). An NX sample core hole was drilled through the ore zone and into the footwall [...]
Carbondale, Illinois Agapito Associates, Inc. (AAI) was commissioned by Southern Illinois University at Carbondale (SIUC) to measure the three-dimensional in-situ stress state using the overcoring method and CSIRO Hollow Inclusion Stress Cells (HI cells) at three Peabody Energy coal mines: the Foidel Creek Mine, Twentymile Coal Company, located in Oak Creek, Colorado; the Francisco Mine [...]
A longwall feasibility study was performed, including review of geologic and geotechnical data, determination of longwall panel orientation, gateroad design, mains, barrier pillars and start-up/recovery rooms, and shield capacity. In-situ stress measurements and strength testing were performed, and a ventilation analysis was conducted. Agapito Associates, Inc. (AAI) conducted geotechnical investigations in support of the planned construction [...]
ExxonMobil—Upstream Research Company Since 2007, AAI has mobilized drilling equipment to the Upstream Research Company’s (URC) Colony Mine ten times for a variety of tasks. Core drilling underground has been done with AW, BW44, BQ, HQ3, and 6-inch-thin kerf coring tools. Core drilling from the surface has been done with HQ3 and HX coring tools. [...]
HDR Engineering AAI completed the drilling and overcore stress measurement under contract to HDR Engineering, Inc., of the Carolinas (HDR) at the Duke Energy (Duke) Keowee Dam Spillway located at the Oconee Nuclear Station near Seneca, South Carolina. The principal purpose of the program was to drill observation core holes and measure the two-dimensional stress [...]
Dominion Generation AAI completed drilling, foundation permeability, and unconfined compressive strength/density testing along with an instrumentation program on behalf of Dominion Generation (Dominion) at the Roanoke Rapids concrete dam. The principal purpose of the program was to drill core holes in various sections of the concrete dam, install geotechnical instrumentation, and complete permeability testing on [...]
Acres International Agapito Associates, Inc. was contracted to perform all aspects of an overcoring stress determination project designed by Acres International. The object of the project was to determine the current stress condition in specific areas of the Robert Moses Niagara Power Project dam and power generation facility, and to provide a summary report. The [...]
West Elk Mine—Somerset, CO AAI has provided underground geotechnical engineering services to Mountain Coal Company’s West Elk Mine since the 1980s. Services include installation of geotechnical instrumentation, in-situ stress measurements, laboratory rock properties testing, periodic ground control reviews, pillar and barrier sizing analysis, shield size specification, geotechnical characterization for shaft design, subsidence evaluation, and geological [...]
U.S. Bureau of Reclamation In August 2003, Agapito Associates, Inc. was contracted to supply the specialized equipment and personnel required to make overcore USBM BDG method stress determinations at the USBR Seminoe Dam, located near Rawlins, WY. AAI provided the USBR with a summary report of the stress determinations and details of the overcoring activities. [...]
Gannett Fleming In April 2007, Agapito Associates, Inc. (AAI) mobilized to Roanoke Rapids, North Carolina, to provide core drilling services, complete stress determinations using the USBM BDG method, make borehole images, and install instrumentation for Gannett Fleming at Dominion Generation’s Roanoke Rapids Dam. Tasks included: Drill two 6-inch-diameter core holes vertically through the dam [...]
Geotechnical Evaluation and Longwall Feasibility AAI performed geotechnical and economic evaluations for the feasibility study of longwall mining at the Trapper Mine for Mencon, LLC. A geotechnical evaluation was conducted for the purpose of (1) identifying geotechnical hazards to longwall mining and (2) establishing geotechnical parameters for mine design. The tasks of the geotechnical program [...]
