Seismic study of coal mine bumps, Carbon and Emery Counties, Utah

Dunrud, C. Richard; Osterwald, Frank W.

doi:10.3133/ofr6445

Cited by 4 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The paper updates previous reports on seismic activity in the district (Dunrud and others, 1970;Barnes and others, 1969;Osterwald and Dunrud, 1966;Dunrud and Osterwald, 1965). A complete tabulation of the larger magnitude tremors that occurred during 1969-70 and a description of how they relate to mining are given in the appendix.…”

Section: Illustrationssupporting

confidence: 64%

“…ITie seismic monitoring network at Sunnyside, which also is described in earlier reports (Barnes and others, 1969;Osterwald and Dunrud, 1966;Maberry, 1966;Dunrud and Osterwald, 1965), consists of three basic seismometer stations about 12 miles apart arranged in a triangular fashion around most of the mine workings in the district (Bear Canyon,Sheep Canyon,. Hie Horse Canyon and Pasture Canyon stations provide supplementary control, and the Pasture Canyon station also serves as the central recording station.…”

Section: Seismic Monitoring Networkmentioning

confidence: 96%

See 1 more Smart Citation

Summary of seismic activity and its relation to geology and mining in the Sunnyside mining district, Carbon and Emery Counties, Utah, during 1967-1970

Dunrud¹,

Osterwald²,

Hernandez³

1973

Open-File Report

Self Cite

View full text Add to dashboard Cite

In the Sunnyside mining district, Utah, coal is mined under thick and variable overburden which is locally weakened by faults and other structural discontinuities. Stress changes and local stress concentrations produced by mining under these conditions often cause sudden and violent ruptures in the coal and surrounding rock mass. The strain energy released by this type of failure, which can produce shock waves and may discharge coal and rock with explosive force, is often a serious threat to life and property. These releases of strain energy are called bumps or bounces by miners if they occur in the coal, and rock bursts if they occur in the surrounding rock mass. Many of these releases are so violent that they generate seismic waves that can be felt, or at least detected by seismic instruments, miles from the site of the rupture, whereas others are smaller and can be detected only by those sensitive seismic instruments within a few thousand feet of the site of the rupture.In 1969 and 1970, about 27,000 and about 15,000 earth tremors, respectively, were recorded by the five-station seismic monitoring network that is located at the surface and encompasses most of the mine workings in the district. Of these totals, 512 and 524 earth tremors, respectively, were of sufficient magnitude (greater than 1.5 on the Richter scale) so that the hypocenters could be accurately located. In 1968 about 20,000 tremors were recorded, with 281 large enough to plot, but in 1967 over 50,000 were recorded, of which 540 were plotted.In this report we discuss the way in which seismic activity, geology, and mining are related or seem to be related for the period 1967 through 1970, with emphasis on the period 1969-70. We also suggest certain mining procedures which, based on studies during the period, might increase the safety and efficiency of mining operations in the Sunnyside district. A complete tabulation of the larger magnitude earth tremors which occurred during 1969-70 and descriptions of how they relate to mining are given in the appendix. Similar tabulations and descriptions for 1967 and 1968 are available in earlier reports (Barnes and others, 1969; Dunrud and others, 1970).

show abstract

Section: Illustrationssupporting

confidence: 64%

Section: Seismic Monitoring Networkmentioning

confidence: 96%

Summary of seismic activity and its relation to geology and mining in the Sunnyside mining district, Carbon and Emery Counties, Utah, during 1967-1970

Dunrud¹,

Osterwald²,

Hernandez³

1973

Open-File Report

Self Cite

View full text Add to dashboard Cite

show abstract

“…Scale is similar for C and D. indicate bump conditions) or by detecting the rate and location of seismic emissions 1. Bumps were more common during periods of increased seismic activity in the Sunnyside, Utah, area, particularly when large-magnitude tremors increased Dunrud and Osterwald, 1965;Osterwald and Dunrud, 1966;Dunrud and others, 1972) 2. Bumps also may be more common when there is a sudden increase, then decrease, of 10 15 FEET seismic events in a given area (Peng, 1978, p. 362) E. Rock bursts and bumps commonly occur: Buckled roof and floor (shown as fault in floor) (A) and arching failure (B) in the Sunnyside, Utah, area caused by high horizontal stresses (arrows), which were caused primarily by high abutment stresses in a room-and-pillar retreat section in the 1960's (the high stresses were caused by uneven pillar lines and leaving unmined pillars in the goaf, which in tum prevented as complete a stress transfer to the goaf as would have occurred if pillar lines were even and all pillars removed).…”

Section: Imentioning

confidence: 96%

Engineering geology applied to the design and operation of underground coal mines

Dunrud¹

1998

View full text Add to dashboard Cite

show abstract

“…The Sunnyside seismic monitoring network and procedures for locating earth tremor hypocenters (map positions and focal depths) were described previously (Barnes and others, 1969;Mabe'rry, 1966;Dunrud and Osterwald, 1965). Starting in 1968, the magnetic recording tapes have been analyzed at the recording site.…”

Section: Seismic Monitoring Networkmentioning

confidence: 99%

Seismic study of coal mine bumps, Carbon and Emery Counties, Utah

Cited by 4 publications

References 0 publications

Summary of seismic activity and its relation to geology and mining in the Sunnyside mining district, Carbon and Emery Counties, Utah, during 1967-1970

Summary of seismic activity and its relation to geology and mining in the Sunnyside mining district, Carbon and Emery Counties, Utah, during 1967-1970

Engineering geology applied to the design and operation of underground coal mines

Seismic activity in the Sunnyside mining district, Carbon and Emery Counties, Utah, during 1968

Contact Info

Product

Resources

About