The types are: 1. PercussiveDrilling2. Rotary Drilling. Method # 1. Percussive Drilling: In this method which is the oldest one ofdrilling, the hole is drilled by striking a number at short in intervals on the rock by a chisel-type tool and between the blows the tool is rotated slightly.
Get PriceAborehole mining methodcomprising driving a borehole, pumpingout a slurry, installation in said borehole a mining device with a hydromonitor and eductor, into a production zone under a lowdegree angle ltlt, waterjet cutting of rock, and creating a cavity said tool is positioned such that the hydromonitor is oriented at an angle to the horizontal plane
Borehole seismic techniquesinclude down-hole, cross-hole andseismictomography methodologies. Typical applications ofborehole seismic techniquesinclude: Calculation of elastic moduli and dynamic rock and soil properties; Vs30 calculations forseismicsite classification (National Building Code) Detection of faults, shear zones and voids;
Feb 10, 2004· Aborehole mining methodcomprising: a) driving at least one borehole, having walls, through a production interval so that within said interval said borehole is driven under a low-degree angle α to the horizontal plane, so that α>0, b) insertion of aminingdevice within said production interval with at least one water jet nozzle, located substantially at the bottom of said mining device, whereby said …
All techniques begin with the successful drilling of aboreholeto the top of the salt formation. The well is cased, or lined, with one or moreMining-Mining- Solutionmining: Natural brine wells are the source of a large percentage of the world’s bromine, lithium, and boron and lesser amounts of potash, trona (sodium carbonate), Glauber’s salt (sodium sulfate), and magnesium.
Geophysics GPR offers the full range ofboreholeimaging and geophysical logging tools. With the latest generation of acoustical and optical televiewer probes and acquisition equipment, we can provide high-resolution images and allow precise structural assessment for geotechnical studies.
Borehole MiningInternational. Inc. 50 YEARS in the business ofborehole mining. APPLICATION AREAS. BHM TOOL & EQUIPMENT. Other than the Tool, BHM requires some additional equipment such as rigs, pumps, pipes, hoses, foot clamps, other auxiliary equipment, etc.
The Bureau of Mines compared the feasibility ofminingdeep phosphate deposits by aborehole miningsystem withminingby proven conventionaltechniques. An economic comparison of theborehole miningsystem with conventional dragline and bucket wheel excavatorminingsystems was completed at variousminingdepths and production rates.
Borehole miningis done to mine many industrial materials like uranium, iron ore, quartz sand, gravel, gold, diamonds and amber. It is a remote controlled method of undergroundmining. It is also used in exploration, oil, gas, and water stimulation.
ABorehole Mining methodcomprising driving aborehole, into a production zone under a low-degree angle α (0<α<35°), installation in saidboreholeaminingdevice with a hydromonitor and eductor, water-jet cutting of rock, pumping-out a slurry, and creating a cavity. Said tool is positioned such that the hydromonitor is oriented at an angle β to the horizontal plane.
The actualborehole miningthen takes place at the selected point. The next step is to lower a casing column into thewellwith the shoe of the casing situated above the top boundary of the ore body production. The third step involves the lowering of theborehole miningtool into the drillwell.
Boreholeseismic surveys can be carried out in several different ways. The Down-hole technique consists of measuring the arrival of seismic waves emitted from the surface in increments down theborehole. The Cross-hole technique uses a seismic source located in an adjacentborehole. The receiver in both cases is a tri-axial geophone.
Feb 10, 2004· 3. Aborehole mining methodas claimed in claim 2, whereinminingof rock material is started at the top of said production interval followed by sliding said device down into saidborehole. 4. Aborehole mining methodas claimed in claim 1, wherein saidboreholeis driven sloping up, whereby said angle α resides in the range 0°<α<25°. 5.
Disclosed aremethodsfor solutionminingof evaporite minerals, such as trona, comprising drilling an accesswelland at least two lateral boreholes; injecting a fluid; circulating the fluid through the lateral boreholes with a controlled fluid flow; and collecting a pregnant solution.
The objective was to determine the optimumborehole miningplan and system forminingcoal seams less than 10 feet thick that pitch more than 25 degrees. Of themethodsconsidered, the double-drill method was selected for further study. This method uses a larger vertical hole for the pumping tool and a smaller slant hole for the cutting tool.
Geophysics GPR offers the full range ofboreholeimaging and geophysical logging tools. With the latest generation of acoustical and optical televiewer probes and acquisition equipment, we can provide high-resolution images and allow precise structural assessment for geotechnical studies.
These include devices to measure or determine induced polarization, magnetic susceptibility, and, hopefully, nuclear activation and the use of spectral analysis.Problems which theminingindustry believes are solvable withwellloggingmethodsinclude bulk assay and recognition of minerals adjacent to and retired from aborehole, delineation of ...
Jul 01, 2008· TheBorehole Hydraulic Coal Mining System(BHCMS) causes fragmentation of coal seams and removes coal slump through a drilled hole using high-pressure water jet. Then the mixture of coal and water as slurry are driven out of theboreholeby hydraulic or air-lifting method, and are separated at the surface.
boreholedefinition: 1. a deep hole made in the ground when looking for oil, gas, or water: 2. a deep hole made in the…. Learn more.
Borehole miningLast updated August 01, 2019Borehole miningtool and technology principle schematic.Borehole Mining(BHM) is a remote operated method of extraction of mineral resources through boreholes based on in-situ conversion of ores into a mobile form (slurry) by means of high pressure water jets (hydraulicking).This process can be carried-out from land surface, open pit floor ...
Oct 23, 2013· There are a variety ofdrilling techniqueswhich can be used to sink aboreholeinto the ground. Each has its advantages and disadvantages, in terms of the depth to which it can drill, the type of sample returned, the costs involved and penetration rates achieved.
Boreholepenetration of rock strata in the shallow subsurface is designed to recover representative samples for chemical and physical tests, to provide an access conduit for sophisticated indirect testing with geophysical sondes, or to provide a conduit to a specific subsurface horizon for extraction purposes.
Nov 01, 2020· As theminingequipment andtechniquescontinue to develop and upgrade, the new high-power directional drilling rig has been successfully researched and developed. With this, it is possible to replace RER with SDBR. This indicates a revolutionary breakthrough in mine gas controltechniques. 3.3.Boreholeconstruction
Step 1 – Hydro-geologists site theborehole. The very first thing that needs to be determined is where the water is, and how we’re going to get to it. That’s why we employ hydro-geologists who make use of a variety ofboreholedrillingmethodsto assess the geophysical properties of the underlying area.
Mar 04, 2018· In the former article, the Down the Hole and Top Hammer Drilling method was introduced. Today we will explain more onrotary drilling methodRotary Drilling Fundamentals Rotary drilling is a versatile method for blast hole drilling. It is the dominant method for holes larger than 203 mm (8”) diameter. In smaller holes, it is …
Boreholemaintenance specialist Geoquip Water Solutions outlines a number of investigation and treatment options forboreholeremediation when water yield starts to fall. Darren Hughes, from D HughesWellDrillers checking the images produced by the Laval R-CAM 1000 XLTboreholecamera to identify that aboreholewas collapsing
Jan 01, 2020· Another geologicalwell-logging tool used less commonly in the U.S. coal industry is sonic logging. Sonic logging requires fluid in theboreholeto transmit high-frequency sound waves through the fluid and the formation and displays the travel time of P waves versus depth . Traditionally, sonic logs have been used for porosity, permeability and ...
Borehole Geophysical Logging. In addition to the numerous surface geophysical services we provide, Hager-Richter also offers a full suite of down-hole geophysicalmethodsto meet our client’s specific needs.Borehole geophysical logginginvolves measuring the physical properties of the surrounding medium with a sensor located in aborehole.
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