State-of-the-art techniques for backfilling abandoned mine voids

Journal Article · Fri Jan 01 00:00:00 EST 1993 · Information Circular - United States, Bureau of Mines; (United States)

OSTI ID:7251176

Walker, J S ^[1]

---

1. Bureau of Mines, Pittsburgh, PA (United States)

Abandoned underground mine openings are susceptible to collapse because of the mining methods used, the character of the overburden, and the typically large, wide entries with minimal roof support. The final effect of the collapse of the underground workings is surface subsidence. To reduce the probability of subsidence, methods to backfill the mine void with various types of materials have been developed. This US Bureau of Mines report describes the available technologies for subsidence abatement and discusses their operation and application. The basis of these abatement methods is the replacement of the mined material with mine waste. Backfilling of mine voids is the most common method of stabilization used to abate subsidence and protect surface structures. Hydraulic flushing and grouting, using remote methods from single or multiple boreholes, are the most often-used methods for the placement of backfill material. Other subsidence abatement techniques are available and may be more appropriate under different conditions. These other techniques include pneumatic stowing, either by in-mine or remote methods, and various point support methods that do not completely fill the mine void and are used for the protection of small areas of the land surface and surface structures. 21 refs., 14 figs.

• OSTI ID: 7251176
• Journal Information: Information Circular - United States, Bureau of Mines; (United States), Vol. 9359; ISSN 0096-1914
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ABANDONED SHAFTS
GROUND SUBSIDENCE
COAL MINES
REMEDIAL ACTION
BACKFILLING
HYDRAULIC TRANSPORT
LAND RECLAMATION
STOWING
UNDERGROUND DISPOSAL
MANAGEMENT
MINE SHAFTS
MINES
SHAFT EXCAVATIONS
TRANSPORT
UNDERGROUND FACILITIES
WASTE DISPOSAL
WASTE MANAGEMENT
012031* - Coal
Lignite
& Peat- Underground Mining- Strata Mechanics & Control- (1987-)