•ARMPS is used for any development mining, retreat mining, and most bleeder pillar analyses. •ALPS is used only for the tailgate corner of longwall panels. •AMSS is for multiple seam interactions, and it incorporates ARMPS and ALPS evaluations.
Read MoreAbstract. Retreat mining is one of the pillar recovery methods to increase the mining yield. This method has a lot of technical considerations because the coal seam or the roof recovers the pillar under relatively weak condition. Retreat mining is also a method of mining as soon as possible using continuous miner and slowly collapsing the goef.
Read MoreThe Analysis of Retreat Mining Pillar Stability (ARMPS) and the LaModel programs have been used successfully in the U.S. for designing safe pillar recovery operations for many years.
Read MoreGet this from a library! Analysis of Retreat Mining Pillar Stability (ARMPS) : version 4.0 for Windows.. [National Institute for Occupational Safety and Health.;]
Read MoreIn the Analysis of Retreat Mining Pillar Stability (ARMPS), Analysis of Longwall Pillar Stability (ALPS) and LaModel programs, the magnitude of the abutment loading adjacent to a gob area is calculated using an "abutment angle" concept, and the extent of the abutment loading
Read MoreThe Analysis of Retreat Mining Pillar Stability (ARMPS) program can be used to help size pillars to carry both development and abutment loads (Mark and Chase, 1997). ARMPS has been calibrated by back-analysis of hundreds of pillar recovery case histories. The database has recently been expanded to include more deep-cover
Read MoreAnalysis of Retreat Mining Pillar Stability 2010. Download. Related Papers. A new method for risk assessment of pillar recovery operation. By Mostafa Sharifzadeh. 34th International Conference on Ground Control in Mining Geotechnical Risk Management to Prevent Coal Outburst in Room and Pillar Mining.
Read MoreRetreat mining of the L3 panel was also simulated in the area of the instrumentation site at the mid-pillar location between crosscuts 12 and 13. A comparison with the single-seam case, calibrated using the LaModel deep cover pillar retreat calibration technique, is seen in Fig. 13 .
Read Moreretreat mining (Pariseau, 1985). would provide objective measurements of ground movement An important objective of t he current analysis was to verify around the shaft in response to pillar mining and would also the adequacy of the rock properties s cale factors and thus to test warn of any potential threat to shaft stability, independently of
Read More@article{osti_171672, title = {Analysis of retreat mining pillar stability}, author = {Chase, F E and Campoli, A A and Mark, C}, abstractNote = {Preventing pillar squeezes, massive pillar collapses, and bumps is critical to the safe and efficient recovery of coal during room-and-pillar retreat mining. To help prevent these problems, the U.S. Bureau of Mines (USBM) has developed the …
Read MoreThe Analysis of Retreat Mining Pillar Stability (ARMPS) program was developed by the National Institute for Occupational Safety and Health (NIOSH) to help the United States coal mining industry to design safe retreat room-and-pillar panels. ARMPS calculates the magnitude of the in-situ and mining …
Read MoreAt least one third of all retreat mining roof fall fatalities occurred during the recovery of the final stump. New Ground Control Theory. Maintain Global Stability with Pillar Design. Maintain Local Stability with Roof Support ~450 ft ~450 ft. The Crandall Canyon mine disaster was
Read MoreLongwall Retreat of Gate Road Pillars. Download NOW! Author: J. M. Listak. Publisher: ISBN: ... Effects of Various Longwall Chain Pillar Configurations on Gate Road Stability. Download NOW! Author: ... Category: Gate roads (Mining) Page: 17. View: 530. Gate roads (Mining) 1985 by . The Effects of a Retreating Longwall on a Three-entry Gate Road ...
Read More"The Analysis of Retreat Mining Pillar Stability (ARMPS) program was developed by the National Institute for Occupational Safety and Health (NIOSH) to help the U.S. coal mining industry to design safe retreat room and pillar panels. ARMPS calculates the magnitude of the in-situ and mining-induced loads by using geometrical computations and ...
Read MoreLongitudinal longhole retreat is a branch of the generic mining method known as sublevel stoping. For longitudinal retreat the long axis of the stope is along (or parallel) to the strike of the orebody. It may also be referred to as bench stoping or sublevel benching. Three variations of this mining method are avoca, eureka, and creeping cone ...
Read MoreAnalysis of Retreat Mining Pillar Stability. The design recommendations will now take into account the panel width as well as the depth of cover in determining acceptable pillar designs for retreat mining. These improvements provide a more realistic assessment of the ground behavior in retreat mining and enhance the capability to analyze some ...
Read MoreAbstract. Pillar extraction, (also referred to as retreat mining; pillar recovery; stooping; pillar robbing; and bord and pillar second workings) is the practice of forming a series of pillars and then partially or totally extracting some or all of the pillars, usually with mining operations retreating out of a panel. There are a number of basic pillar extraction methods, with numerous ...
Read MoreThe Analysis of Retreat Mining Pillar Stability (ARMPS) program has been used to evaluate room and pillar retreat mining layouts since it was first released in the mid 1990s. After the Crandall Canyon mine disaster focused attention on the importance of pillar design, ARMPS became an essential component in most Roof Control Plans developed by ...
Read MorePreventing pillar squeezes, massive pillar collapses, and bumps is critical to the safe and efficient recovery of coal during room-and-pillar retreat mining. To help prevent these problems, the U.S. Bureau of Mines (USBM) has developed the Analysis of Retreat Mining Pillar Stability (ARMPS) computer program.
Read MorePillar design for room-and-pillar retreat mining was pursued next. Before 1994, pillar recovery operations had been associated with about 25% of all roof fall fatalities underground; in addition, at least 12 massive pillar collapses had occurred, . The analysis of retreat mining pillar stability (ARMPS) was developed as a first step towards ...
Read MorePillar Retreat Coal Mine in Southwest ia William Jennings Conrad Thesis submitted to the faculty of the ia Polytechnic Institute and State University in partial fulfillment of the requirements for the degree of Master of Science In Mining & Minerals Engineering Erik C. Westman, Chairman Mario G. Karfakis Kramer D. Luxbacher
Read MoreMining Product: ARMPS - Analysis of Retreat Mining Pillar Stability. ARMPS (Analysis of Retreat Mining Pillar Stability) is software for designing pillars for room-and-pillar retreat mining. ARMPS calculates stability factors based on estimates of the loads applied to, and the load-bearing capacities of, pillars during retreat mining operations.
Read MoreThe National Institute for Occupational Safety and Health (NIOSH) first developed the Analysis of Retreat Mining Pillar Stability (ARMPS) program to help the U.S. coal mining industry to design retreat room and pillar panels. Similar to other pillar design methodologies, ARMPS determines the adequacy of the design by comparing the estimated in ...
Read Moreo Precautions for the Use of the Analysis of Retreat Mining Pillar Stability (ARMPS) Computer Program – April 7, 2008 . Pending Actions: • Future Program Information Bulletins . o. Guidelines for Use of Numerical Modeling, Type of Information to be Provided in Roof Control Plan Submittals . o. Guidelines for Use of LaModel Computer Modeling ...
Read MoreRelated abbreviations. The list of abbreviations related to ARMPS - Analysis of Retreat Mining Pillar Stability
Read More8.7.3.2 ANALYSIS OF RETREAT MINING PILLAR STABILITY (ARMPS) Required by MSHA for permitting of underground coal mines, used for designing pillars for room-and-pillar retreat mining. Calculates the stability factor (SF) from estimated pillar loads and load-bearing capacity within a given design. 8.7.3.3 ANALYSIS OF RETREAT MINING PILLAR ...
Read MoreGlobal stability is addressed through proper mine design. Local stability is addressed through the installation of roof bolts, use of standing support such as mobile roof supports or posts, and an adequately sized final pillar stump. 9 In room-and-pillar retreat mining …
Read MoreResults of the first method, Analysis of Retreat Mining Pillar Stability (ARMPS), were well below NIOSH recommendations. The second method, a finite element analysis of the mining plan, indicated a decidedly unsafe, unstable situation in the making even without pillar recovery.
Read MoreBarrier pillars have a high width-to-height ratio, typically greater than about 10, and contain panel pillars with a low width-to-height ratio, typically in the 0.5 to 2 range. It is a noncaving room-and pillar method in that panel pillars are not meant to fail during retreat mining.
Read MoreR. Kayne Retreat mining advances away from the entrance to the mine, then works its way back to the front. Retreat mining is the last phase of a common type of coal mining technique referred to as room and pillar mining. In room and pillar mining a mining machine known as a "continuous miner" bores a network of chambers or "rooms" into a coal seam, leaving behind an unexcavated pillar ...
Read MoreRetreat mining is the removal of pillars in the underground mining technique known as room and pillar mining. In the first phase of room and pillar mining, tunnels are advanced into the coal or ore body in a rectangular pattern resembling city streets. Pillars are left between tunnels to support the weight of …
Read MoreARMPS-HWM is a modification of Analysis of Retreat Mining Pillar Stability (ARMPS) software for designing web and barrier pillars for Highwall Mining (HWM). ARMPS-HWM calculates stability factors based on estimates of the loads applied to, and the load-bearing capacities of, web and barrier pillars used in highwall mining operations.
Read MoreBooks about Ground Control Ramifications and Economic Impact of Retreat Mining on Room and Pillar Coal Mines. Language: en Pages: 402. Proceedings of the 37th International Conference on Ground Control in Mining. Authors: Brijes Mishra, Ted Klemetti, Heather Lawson, Michael Murphy, Kyle Perry ...
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