دانلود رایگان
دانلود رایگان Hard rock drilling technique with abrasive water jet assistance
Hard
rock
drilling
technique
with
abrasive
water
jet
assistance
مقاله
پاورپوینت
فایل فلش
کارآموزی
گزارش تخصصی
اقدام پژوهی
درس پژوهی
جزوه
خلاصه
WATER AND ABRASIVE JETTING, AND …
WATER AND ABRASIVE JETTING, AND MECHANICAL TECHNIQUES EXPEDITE HARD ROCK DRILLING. A comparison of approaches for rapidly drilling small-diameter (25-50 mm) and near-surface holes along a short-radius (30 m) arc, in a variety of hard rock types, is described.
Abrasive Water Jet - an overview | ScienceDirect …
Abrasive Water Jet Machine (AWJM) can be used for machining wide range of softer as well as harder materials of large thickness for different applications. Some of the typical applications [67] are as follows: (a) AWJM is used for cutting metallic sheet of titanium, aluminum, stainless steel, high tensile strength steel, super alloy, etc. for aircraft industry, rolling stock industry ...
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5. Experimental results and discussions
Combined drilling of hard rock with abrasive water …
A new kind of drilling method with abra- sive water jet and mechanical bit was developed by Tang because the dense "boss" in the hole bottom of hard rocks requires a more efficient drilling...
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5. Experimental results and discussions
link.springer.com
In order to improve the rock breaking efficiency of hard rock tunnel boring, many innovative rock breaking methods have been proposed (e.g., the water jet cutting, the high-power laser cutting, the impact-rotary drilling, and the undercutting method). However, most of the methods are not applicable to TBMs due to some structural reasons. Aiming on this problem, a free-face-assisted rock ...
NIOSHTIC-2 Publications Search - 10009163 - An …
The U.S. Bureau of Mines has patented an abrasive-enhanced waterjet rock drill. Drilling occurs through the action of a 10,000-psi, 20- gpm waterjet containing 20 lb/min of entrained abrasives. This 10,000-psi drill has drilled hard rock with an unconfined compressive strength of 73,000 psi.
A COMPARISON OF WATER JET, ABRASIVE JET AND ROTARY …
Abrasive jet drilling (abrasive water jet and abrasive slurry jet) Figure 1. ... approaches was compiled from the literature and from drilling tests of all four techniques in black granite ... This drill was not used to drill hard rock at the time, however more recently the.
Combined drilling of hard rock with abrasive water …
A new kind of drilling method with abra- sive water jet and mechanical bit was developed by Tang because the dense "boss" in the hole bottom of hard rocks requires a more efficient drilling...
Hard rock drilling technique with abrasive water jet ...
A new kind of hard rock mechanical drilling technique with the abrasive water jet assistance is developed for this issue, and the abrasive water jet is introduced to erode the “boss” for a “pilot...
Hard rock drilling technique with abrasive water jet ...
A new kind of hard rock mechanical drilling technique with the abrasive water jet assistance is developed for this issue, and the abrasive water jet is introduced to erode the “boss” for a “pilot...
Abrasive-Enhanced Water-Jet Drill for Hard Rocks
Abrasive-Enhanced Water-Jet Drill for Hard Rocks LI BRARY SPOKAN E RESEARCH CENTER RECEIVED SEP 5 tS89 us. BUREAU OF MINES E. 31 5 MONTGOMERY AVE., SPOKANE, W A 99207, By George A. Savanick and Walter G. Krawza UNITED STATES DEPARTMENT OF THE INTERIOR
link.springer.com
In order to improve the rock breaking efficiency of hard rock tunnel boring, many innovative rock breaking methods have been proposed (e.g., the water jet cutting, the high-power laser cutting, the impact-rotary drilling, and the undercutting method). However, most of the methods are not applicable to TBMs due to some structural reasons. Aiming on this problem, a free-face-assisted rock ...
link.springer.com
In order to improve the rock breaking efficiency of hard rock tunnel boring, many innovative rock breaking methods have been proposed (e.g., the water jet cutting, the high-power laser cutting, the impact-rotary drilling, and the undercutting method). However, most of the methods are not applicable to TBMs due to some structural reasons. Aiming on this problem, a free-face-assisted rock ...
Hard rock drilling technique with abrasive water jet ...
A new kind of hard rock mechanical drilling technique with the abrasive water jet assistance is developed for this issue, and the abrasive water jet is introduced to erode the “boss” for a “pilot...
Mechanism of rock breaking by pick assisted with …
In the rock breaking progress, the resistant force results in tools failure and the low cutting efficiency, thus, it is necessary to reduce the failure of tools and enhance the efficiency of cutting and drilling. In this paper, different configuration modes of water jet were presented to solve this issue. Moreover, the symmetrical pre-split finite element models for rock breaking by pick ...
A COMPARISON OF WATER JET, ABRASIVE JET AND ROTARY …
Abrasive jet drilling (abrasive water jet and abrasive slurry jet) Figure 1. ... approaches was compiled from the literature and from drilling tests of all four techniques in black granite ... This drill was not used to drill hard rock at the time, however more recently the.
Combined drilling of hard rock with abrasive water …
A new kind of drilling method with abra- sive water jet and mechanical bit was developed by Tang because the dense "boss" in the hole bottom of hard rocks requires a more efficient drilling...
Abrasive-Enhanced Water-Jet Drill for Hard Rocks
Abrasive-Enhanced Water-Jet Drill for Hard Rocks LI BRARY SPOKAN E RESEARCH CENTER RECEIVED SEP 5 tS89 us. BUREAU OF MINES E. 31 5 MONTGOMERY AVE., SPOKANE, W A 99207, By George A. Savanick and Walter G. Krawza UNITED STATES DEPARTMENT OF THE INTERIOR
Improvement of Disc Cutter Performance by Water …
This article deals with the problem of assisting disc cutters by means of high-velocity jets of water, with the aim of increasing the excavation rate while improving the working conditions, with particular reference to wear. The results of an experimental research undertaken at the Waterjet Laboratory of the University of Cagliari on a medium–hard abrasive rock clearly show that a higher ...
Effect of Abrasive Feed Rate on Rock Cutting …
Rock cutting with an abrasive waterjet system has been attempted in mining and construction fields. In abrasive waterjet cutting, the overall operating cost depends on the cost of the consumed abrasive. For this reason, it is important to identify an optimum abrasive feed rate for cost and performance efficiency. In this study, the concept of the abrasive/water ratio in volume (i.e., mixing ...
Universal Method for the Prediction of Abrasive …
01/12/2017 · Thus, hard rocks under normal conditions are always brittle, whereas most metals are ductile. 3. Method to predict abrasive waterjet performance. Although the destruction of hard rock is considered to be the main application for AWJ in mining, this technology can also be used (as mentioned above) to cut non-rock materials.
NIOSHTIC-2 Publications Search - 10007262 - …
This drill can cut through hard rocks with moderate-pressure jets; e.g., rocks with a compressive strength of 73,000 psi can be drilled with a 10,000-psi abrasive jet. In addition to drilling holes, the drill can cut deep, narrow kerfs; collar a hole at any angle; drill through rubble; and chamber holes.
Drilling Technique - an overview | ScienceDirect …
Subhash Shah, in Abrasive Water Jet Perforation and Multi-Stage Fracturing, 2018 9.3.3 Hydrothermal Jet Drilling Procedures The steps involved in the hydrothermal jet drilling technique are as follows: fuel, oxygen, and cooling water are injected into the down-hole reaction chamber along different conduits.