Search U.S. government technical reports digitized or harvested by TRAIL.
Experimental studies on the origin and accumulation of coalbed gas
Grouting horizontal drainage holes in coalbeds
A fail-safe control system for a mine methane pipeline
Long-term rock noise plotting techniques
Three coal mine gob degasification studies using surface boreholes and a bleeder system
Practical ignition problems related to intrinsic safety in mine equipment :four short-term studies
Reinforcement mechanisms of untensioned full-column resin bolt
Control of methane by ventilation of shafts during raise drilling
Methane drainage study using an underground pipeline, Marianna mine 58
Drilling a horizontal coalbed methane drainage system from a directional surface borehole
Laboratory testing of chemical oxygen self-rescuers for ruggedness and reliability
Preliminary evaluation of bit impact ignitions of methane using a drum-type cutting head
Control of longwall gob gas with cross-measure boreholes (upper Kittanning coalbed)
Novel coal-cutting bits and their wear resistances
Kettlebottoms :their relation to mine roof and support
Mechanical properties of some portland cement concretes made with coal and coal waste as aggregates
Geologic factors in coal mine roof stability :a progress report
Evaluation of the safety of one-hour compressed oxygen self-rescuers--results of destructive testing
Performance comparison of oxygen self-rescuers
Delayed blasting tests to improve highwall stability :a progress report
Effect of turbulence on vortex-shedding air-velocity transducers
Fire tests of five-gallon containers used for storage in underground coal mines
An overview of research on explosionproof enclosures
Remedial and strata replacement techniques on longwall faces :a report on the state of the art
Coal mine air tempering :effectiveness, design, and roof support
Electrostatic sensitivity, strength, and no-fire current of short-delay detonators
Anchorage capacities in thick coal roofs
Safety aspects of pneumatic transport
Coal mine roof instability :categories and causes
Bureau of Mines research into reducing materials handling injuries
Effects of millisecond-delay intervals on vibration and airblast from surface coal mine blasting
Delayed blasting tests to improve highwall stability :a final report
Firing delay characteristics of instantaneous and seismic detonators
Gas equilibrium in sealed coal mines
Short-delay blasting in underground coal mines
Evaluating ventilation parameters of three coal mine gobs
Protective structures for low-coal shuttle car operator
Coal mine hazard detection using in-seam ground-penetrating-radar transillumination
Clay veins :their occurrence, characteristics, and support
Probe-hole drilling :high-stress detection in coal
Evaluation of high-pressure front-mounted water jets for frictional-ignition suppression
Laboratory testing of the CSE SR-100 self-contained self-rescuer for ruggedness and reliability