Proc Longwall USA Conf Pittsburgh, Pennsylvania, 9/13-15/88 Indus Pres Inc Aurora Colorado 1988 :168-185
This U.S. Bureau of Mines paper presents the results of a 2-yr study intended to characterize the structural response of longwall gateroad systems situated in a deep western coal mine subjected to known geologic, overburden, and mining conditions. Data from extensive field instrumentation, numerical modeling analyses, and documented observations in the respective headgates and tailgates obtained from two-, three-, and four-entry systems throughout the mining cycle are presented. Specific conclusions inferred from the study suggest that the more entries driven and the wider the span of the gateroad, the more overall areal loading imposed on a gateroad system, resulting in a marked increase in roof falls. Although there are an infinite number of combinations of gateroad configurations that could conceivably be used, the fact remains that one western coal operator, mining under deep cover, has invested considerable time, effort, and capital to successfully evolve, through firsthand mining experience, a system that minimizes ground control problems for site-specific geologic and overburden conditions.
Proc. Longwall USA Conf, Pittsburgh, Pennsylvania, 9/13-15/88. Indus. Pres., Inc., Aurora, Colorado, 1988, Pp 168-185