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Longwall mining activities alter the exsisting ground stress field, this changed stress field is known as induced stress. Extraction of coal by longwall mining induces a redistribution of stresses causing the rocks near the mining excavation to accomodate a redistributed load. Effective and efficient longwall mining is dictated by the […]
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The book contains twelve chapters. After a brief introductory chapter, we review current general practices in underground mine layouts, roof control, and common ground control failures, and then proceed to a chapter-by-chapter discussion of the state-of-the-art of coal mine ground control technology.
2. GROUND MOVEMENT MONITORING Various modes of instrument operation exist, namely: Mechanical: often provide the simplest, cheapest and most reliable methods of detection, transmission and readout. Mechanical movement detectors use a steel rod or tape, fixed to the rock at one end, and in contact with a dial gauge or electrical system at the other.
Mining Product: Ground Control Software Toolbar. Keywords: Analysis methods Ground control. Original creation date: August 2005. Authors: NIOSH. ... Installing the Ground Control Toolbar will also install the following NIOSH Ground Control analysis packages: Analysis of Horizontal Stress Effects in Mining (AHSM), Analysis of Longwall Pillar ...
Ground Control Monitoring: A Comprehensive Guide for Mine Operators on Instrumentation and Data Acquisition Currently Used by the National Institute for Occupational Safety and Health (NIOSH) Advanced Search. Select up to three search categories and corresponding keywords using the fields to the right.
Ground control is one of the four subsystems of underground mining. It covers not only roof control, but also rib control, floor control, pillar design, shield design, overburden failures and ...
Photogrammetry in underground mining ground control — Lucky Friday mine case study DJ Benton et al. 588 Deep Mining 2017, Perth, Australia found that 63.6% of fatalities were caused by ground falls (Seymour et al. 2013). Methods by which falls of ground can be mitigated, or at least reliably anticipated, are therefore a key mining safety concern.
Ground control technicians or technologists who work with the specialists and install and collect data from ground monitoring instrumentation and perform quality control tests on ground support systems. Using external consulting engineers. ... The mine ground control program should list: all ground support systems (including components and ...
9.16. Discussions 311. References 315. This chapter summarizes recent advances in coal mine ground control technology and practice from the operator's perspective. While …
44th International Conference on Ground Control in Mining. Our vision is to create a forum to promote communication among researchers, consultants, regulators, manufacturers, and mine operators to expedite solutions to ground control problems in mining. ... Ground Instrumentation and Monitoring Studies; Subsurface Subsidence; New Ground Control ...
32nd International Conference on Ground Control in Mining Instrumentation of a Roof Bolter Machine for Void Detection and Rock Characterization Soheil Bahrampour, Bahrampour,Ph.D. S. Student Jamal Rostami, Associate Rostami, J. Professor Ali Naeimipour, Ph.D. Naeimipour, A. Student Pennsylvania StateC.University Collins, State College,S.PA ...
Ground Control Aspects: Maintaining a straight face has inherent ground control advantages in terms of being able to maintain an even goaf edge and not having to stop and perform straightening cuts. There is also the opportunity of being able to maintain a different face profile purely for ground control reasons. In Australia, under heavy ground
Ground Control 0 Comment As bord and pillar workings are developed roof support becomes a major consideration and operating cost item. Support requirements vary considerably and are dependent on the physical conditions in the seam, which are often depth dependent, and the length of time that the workings are required to be serviceable.
This paper describes recent developments in mining ground control instrumentation and software that are providing a significant contribution to preventing falls of …
Ground Control Instrumentation - a Manual for the Mining Industry. information circular published in 1985. Statements. instance of. publication. 1 reference. stated in. NIOSHTIC-2. title. Ground Control Instrumentation - a Manual for the Mining Industry (English) 1 reference. stated in. NIOSHTIC-2.
This includes recording rainfall, potable water and raw water, as well as ground water pumped from mining activities. The methods used can vary, but the most commonly used measurement technologies are electromagnetic flowmeters and ultrasonic clamp-on flowmeters, as well as ultrasonic level sensors set up for open channel flow measurement at ...
Access the research from past conference proceedings, starting in 1981 through 2024. Hear from industry thought leaders about research, developments, and advancements in ground control science at this years conference. Engage in open-forum discussions with the authors of some …
Quality in ground control. Ground control is defined as the ability to predict and influence the behaviour of a rock mass in the vicinity of underground or open pit mining excavations. It consists of recognition of ground conditions, geotechnical mine design, mining activities (drilling, blasting and support), and monitoring of rock mass ...
Kidston Mine QLD: Provision of geotechnical team, instrumentationand monitoring of major pit wall failure. • Yallourn Mine, Vic: Instrumentationand monitoring of ground water and slope movements. • Anglesea Mine, Vic: Instrumentation and monitoring of ground water and slope movements, ongoing geotechnicalstability assessments. increase ...
For critical and super critical mining subsidence situations, the goaf load trinagle will reach the surface boundary, for this situation the load on the pillar equation becomes, for w/h >= 2 tan f The respective average pillar stress for these two conditions are given by:
Longwall mining activities alter the exsisting ground stress field, this changed stress field is known as induced stress. Extraction of coal by longwall mining induces a redistribution of stresses causing the rocks near the mining excavation to accomodate a redistributed load.
ABSTRACT. As mining operations increase in scale and mines go progressively deeper, the geotechnical input into mine design is of importance. This book covers topics in geotechnical instrumentation and monitoring, …
ground failures leading to mineworker injuries and fatali-ties. Advancing the science behind ground control relies heavily on conducting mutually beneficial research at par-ticipating …
This Bureau of Mines manual is intended to provide a better understanding of ground movement and the technology available for measuring it, The manual deals with convergence, strata separation, lateral roof movement, stress, and support load in underground mines. The instruments that measure these ground control parameters are described in detail. Step-by …
Field experience and technical expertise has made AME renown in rock mechanics and ground control. Pillar design and stability analysis for underground single and multiple seam mining operations. Design of pillars, entries, headers, panels, submains, and mains to maximize safe mineral extraction. ... Ground Instrumentation.
This report by the Bureau of Mines, U.S. Department of the Interior, presents several practical and inexpensive types of rock mechanics instrumentation for ground control around longwall panels. Application of these critical parameters, determined by this instrumentation, to the design and modification of rational longwall-mining systems is also discussed. In order to …
Ground Control in Mining. Submission status. Closed. Technological advances in field instrumentation and monitoring, computer modeling, laboratory testing, ground control support systems, development of deeper mines, slope, …
While overall safety in U.S. coal mines has improved dramatically in the last. 50 years, fatality rates continue to exceed other major industrial sectors (fig. 1). Fatalities due to ground falls …