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A study of falls of roof and coal in Northern Colorado

A study of falls of roof and coal, Rock Springs Coal District, Sweetwater County, Wyo.

Places of occurrence of injury from falls of roof

Studies of roof movement in coal mines.

Studies of roof movement in coal mines.

Measurement of pressures on rock pillars in underground mines.

Measurement of pressures on rock pillars in underground mines.

Studies of roof movement in coal mines.

Cooling mine air during summer months to prevent roof falls

The microseismic method of predicting rock failure in underground mining.

The microseismic method of predicting rock failure in underground mining.

Control of roof and prevention of accidents from falls of rock and coal

Suspension roof support.

Roof movement study of mechanized retreating longwall operation, Lancashire no. 15 mine, Bakerton, Cambria County, Pa.

Cementation of bituminous-coal-mine roof strata.

Roof-span studies in limestone

Method of determining the strength of a mine roof

Cementation of bituminous-coal-mine roof strata :injection of epoxy and polyester-type resins

Use of sonic techniques in exploring coal-mine roof strata :a progress report

Survey of practices in controlling roof at intersections and junctions in underground coal mines

The combined effects of friction and suspension in bolting bedded mine roof

The effect of suspension in bolting bedded mine roof

Geologic factors causing roof instability and methane emission problems :the Lower Kittanning coalbed, Cambria County, Pa.

Investigation of longwall gateroad roof support characteristics at Powhatan No. 4 Mine :instrumentation plan

The relation of geology to mine roof conditions in the Pocahontas No. 3 coalbed

Geologic structures in coal mine roof

Correlation of LANDSAT and air photo linears with roof control problems and geologic features

Kettlebottoms :their relation to mine roof and support

Geologic factors in coal mine roof stability :a progress report

Ultrasonic convergence measurements

Recognizing signs of excessive loading in underground coal mines

Factors affecting respirable dust generation from longwall roof supports

Coal mine air tempering :effectiveness, design, and roof support

Coal mine roof instability :categories and causes

A short-term evaluation of compressible stoppings used in trona mines

Shield mechanics and resultant load vector studies

Cutter roof failure :an overview of the causes and methods for control

Critical-load studies of a shield support

Shield-loading studies at an eastern Appalachian minesite

Analysis of cutter roof failure induced by clastic dikes in an underground coal mine

Arch canopy design procedure for rehabilitation of high-roof-fall areas

Roof and rib fall accident and cost statistics :an in-depth study

The character of five selected LANDSAT lineaments in southwestern Pennsylvania

Detection of roof instability by monitoring the rate of movement

Factors affecting strength and stability of wood cribbing :height, configuration, and horizontal displacement

Application of stereoscopic (3-D) slides to roof and rib hazard recognition training

Strain energy as a basis for optimizing roof truss installations in bedded roof

Horizontal and vertical load transferring mechanisms in longwall roof supports

Roof truss contact forces

Laboratory assessment of alternative longwall stabilization materials


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