Inquiry

geophysical intrument for coal mine

China Hydro-geophysical Instruments Manufacturers and

Hydro-geophysical Instruments Hydro-geophysical Instruments are intrinsic safety designed for water-bearing/intruding structure detection in the gas or coal dust explosive dangerous environment of underground coal mine. YCS2000A

Learn More

PDF) A Guide for Applying Geophysics to Coal Mining

2015/02/01 · Like many old abandoned coal mine sites, the study area lacks adequate mine records that show the extent of the underground coal mining activities that took place in the area in the late 1930s

Learn More

PDF Geophysical Methods in Exploration and Mineral

Magnetometers have been used to trace burned-out coal seams, particularly pyrite-bearing coal. During combustion, pyrite may oxidize to magnetite, which then can be traced using surface or airborne magnetic measurements. If the burned seam is still hot, geothermometry and infrared sensing methods may be used.

Learn More

China Velocity Seismic Geopone 8Hz for Coal Mine Seismic

Geopone String, Geophone Array, Land Geophone manufacturer / supplier in China, offering Velocity Seismic Geopone 8Hz for Coal Mine Seismic Exploration and Masw and Nearsurface, Ert Cables for Abem Terrameter Lund Imaging System, Low Frequency Hydrophone 4Hz for Underwater Longitudinal Seismic Survey and so on.

Learn More

CHAPTER 8.5: Geotechnical Instrumentation

Geotechnical Instrumentation 553 simple, and robust. Alternatively, scribe systems (Table 8.5-1) use tungsten carbide knives differentially spaced around the core barrel to continuously mark the core as it enters the bar-rel. Scribe

Learn More

Nine Competitive Industries | Geophysical Instrument

It mainly produces more than 20 kinds of geophysical instruments, for instance the devices for detection of water-bearing anomaly in underground mine roadway in roof and floor, side wall, and front space of excavation, the small structure, and the mine water condition monitoring and control.

Learn More

Detection of Underground Voids in Ohio by Use of Geophysical

Abandoned underground coal-mine voids are an important source of water supply for some communities in eastern Ohio (Crouch and others, 1980). In other areas, acid mine drainage from mine voids affects water quality Abstract 1

Learn More

China Drill Rig manufacturer, Directional Drilling, Coal Mine

We are mainly engaged in basic application research on coal geology, hydrogeology, engineering geology, geophysical instrument and exploration, drilling technology, geo-technical engineering, environmental engineering, coal bed methane resources assessment and development and other disciplines.

Learn More

Detection of Underground Voids in Ohio by Use of

Abandoned underground coal-mine voids are an important source of water supply for some communities in eastern Ohio (Crouch and others, 1980). In other areas, acid mine drainage from mine voids affects water quality Abstract 1

Learn More

Seismic Coal Exploration | ScienceDirect

Thus, to reduce mining costs it is essential to delineate the geology prior to mining. Today, the only effective geophysical tool to detect and to map minor faults in front of the coal cutter is in-seam seismics using channel, or so called seam waves. The techniques are well established and successfully applied for more than two decades.

Learn More

China Hfmt Series Geophysical Instrument Detector for

Portable Locator Scanner Detector, Gold Mine Finder for Mining, Portable Multi-Function Mine Diamond Locator manufacturer / supplier in China, offering Hfmt Series Geophysical Instrument Detector for Underground Metal Detection, Hf856A Hydraulic Rotary Drilling Machine Bridge Piling Rig, Hf220y Hydraulic Multi-Functional Core Borehole Deep Water Well Drilling Rig and so on.

Learn More

Use of an automatic resistivity system for detecting

article{osti_6287233, title = {Use of an automatic resistivity system for detecting abandoned mine workings}, author = {Peters, W R and Burdick, R G}, abstractNote = {A high-resolution earth resistivity system has been designed and constructed for use as a means of detecting abandoned coal mine workings.

Learn More

Coal Exploration and Geophysical Logging, with Insitu

Initially a coal seam can be core-drilled and the core recovered for study. After a hole is drilled and the core is recovered, the hole is geophysically logged using a gamma/gamma (slim density) geophysical tool. This geophysical tool is small enough to be lowered down the center of the drill rods.

Learn More

Experimental study of coal burst risk prediction using

The sustainable and clean mining of coal is essential for Australia and the world as coal is a key energy source. However, with the increase of mining depth, many coalmines are facing potential coal burst hazards as deep mining always associated with high gravitational stress and complicated geology.

Learn More

Coal mining - Choosing a mining method | Britannica

Coal mining - Coal mining - Choosing a mining method: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam depends on many technological, economic

Learn More

PDF A Geophysical Investigation of Near Vertical Boreholes in

A Geophysical Investigation of Near Vertical Boreholes in the Roof of an Underground Tunnel in a Coal Mine Patrick Mah, P.Geo DMT Geosciences Ltd., Calgary, Alberta, Canada Brian Wong, P. Eng Teck Coal Ltd., Sparwood, British Columbia, Canada Torsten Gorka,Dipl. Geol. DMT Co., KG, Essen, Germany ABSTRACT

Learn More

World's biggest mine: Inside US coal

Barack Obama’s pledge to cut carbon emissions has not stopped North Antelope Rochelle mine in Wyoming. In fact, production is booming - and climate change is

Learn More

Mining Geophysics

Mining Geophysics. For over 50 years, Canada has led the world in the field of geophysical exploration for minerals. This prominence is natural because Canada has a large land mass and has one of the highest potentials for the discovery of mineral resources. Copper, lead, zinc, iron, gold and potash are among these resources.

Learn More

Coal Exploration and Mining Geology

Geological science and associated technology are used to find and evaluate the coal resources that will be used to meet these needs, a process referred to as coal exploration, and to assist in designing and operating effective systems for coal mining (coal mining geology), preparation and utilization tasks.

Learn More

IHI Underground Coal Mine Fire Mitigation: Geophysical

Mining began in early 1900’s • Fire first reported in 1948 • 1975; US Bureau of Mines completed surface seal • Colorado Inactive Mines Reclamation Program (IMRP) conducts three drill and grout projects – 1990’s: Phase I-1994, Phase II-1995, & Phase III-1999 • 2000– 2010 IMRP conducts surface fire management projects.

Learn More

Geophysical Methods & Applications

Subsurface Surveys, an applied geophysics company, uses a variety of geophysical methods to solve engineering, geological, environmental and forensic problems. The methods and instruments we use are chosen to meet the specific needs of our clients and accommodate the existing field conditions. Geophysical Areas Covered • Seismic Refraction

Learn More

Geophysics & Exploration Instruments | Instrumentation GDD

Instrumentation GDD Inc. is a world leader in high-tech geophysical instrumentation for mining and exploration geophysics, groundwater exploration, geotechnical investigations and other related fields. Since 1976, GDD has developed, manufactured and sold a wide range of Electromagnetic (EM) and Resistivity/Induced Polarization geophysical instruments.

Learn More

Home - Robertson Geo

From the Arctic to Australia, from coal mines to windfarms, energy developments to sky-reaching superstructures, Robertson Geo technologies have been used to acquire quality geophysical data from over 160 countries around the globe.

Learn More

Detection of Abandoned Underground Coal Mines by Geophysical

DETECTION OF ABANDONED UNDERGROUND COAL MINES BY GEOPHYSICAL METHODS by HRB-Singer, Incorporated Environmental Sciences Branch Science Park State College, Pennsylvania 16801 for the ENVIRONMENTAL PROTECTION AGENCY and the PENNSYLVANIA DEPARTMENT OF ENVIRONMENTAL RESOURCES Project 14010 EHN April 1971 For salo by the Superintendent of Documents, U.S. Government Printing Office, Washington

Learn More

Geophysical Method For Coal Exploration

Velseis Pty Ltd, Australia Seismic reflection is a valuable geophysical tool for accurate and cost-effective imaging of coal seams and is of significant importance to the economics of coal mining in Australia. J., and Mller, G., 1978, Computation of synthetic. Live Chat.

Learn More

CDC - Mining Project - Coal Pillar and Entry Stability - NIOSH

The stability of coal mine entries cannot be properly analyzed without also considering pillar stability. It is widely understood that coal pillars interact with the surrounding strata. Excessive rib sloughage can lead to increased opening spans which could impact the stability of the mine roof.

Learn More