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HE 20.7131:8665
|
Probability of encountering coalbed discontinuities during vertical and horizontal borehole drilling |
1 |
|
HE 20.7131:8669
|
Degasification of the Mary Lee coalbed, Brookwood, Ala |
1 |
|
HE 20.7131:8675
|
Degasification study from an air shaft in the Beckley coalbed |
1 |
|
HE 20.7131:8702
|
Electromagnetic surface fields due to a magnetic dipole buried in a three-layered earth |
1 |
|
HE 20.7131:8828
|
Vertical magnetic noise in the voice frequency band within and above coal mines |
1 |
|
HE 20.7131:8838
|
Water in fusion an effective and economical longwall dust control |
1 |
|
HE 20.7131:8841
|
Control of longwall gob gas with cross-measure boreholes (upper Kittanning coalbed) |
1 |
|
HE 20.7131:8843
|
Use of a sodium silicate gel grout for plugging horizontal methane-drainage holes |
1 |
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HE 20.7131:8844
|
A short-range locator system for detecting trapped miners |
1 |
|
HE 20.7131:8861
|
Assessment of methane hazards in an anomalous zone of a Gulf Coast salt dome |
1 |
|
HE 20.7131:8869
|
Apparent earth conductivity over coal mines as estimated from through-the-earth electromagnetic transmission tests |
1 |
|
HE 20.7131:8879
|
Influence of overlying strata on methane emissions in a northern West Virginia coal mine |
1 |
|
HE 20.7131:8880
|
Simulation of methane flows in noncoal mines |
1 |
|
HE 20.7131:8886
|
New bag nozzle to reduce dust from fluidized air bag machines |
1 |
|
HE 20.7131:8888
|
Overlap probability for short-period-delay detonators used in underground coal mining |
1 |
|
HE 20.7131:8985
|
Methane control on longwalls with cross-measure boreholes (Lower Kittanning coalbed) |
1 |
|
HE 20.7131:8986
|
Measuring formation pressures and the degree of gas drainage in a large coalbed gas drainage field |
1 |
|
HE 20.7131:8987
|
Reducing hazards in underground coal mines through the recognition and delineation of coalbed discontinuities caused by ancient channel processes |
1 |
|
HE 20.7131:9013
|
Comparisons between cross-measure boreholes and surface gob holes |
1 |
|
HE 20.7131:9060
|
Clay veins their occurrence, characteristics, and support |
1 |