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Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: In this quarter, the field, theoretical and programming works have been performed toward achieving the research goals set in the proposal. The main accomplishments in this quarter included: (1) two more sets of field tests have been conducted in an underground coal mine, (2) optimization studies of the control parameters have been conducted, (3) method to use torque to thrust ratio as indicator of rock relative hardness has also been explored, and (3) about 97% of the development work for the r… more
Date: September 15, 2004
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: Roof bolting is the most popular method for underground openings in the mining industry, especially in the bedded deposits such as coal, potash, salt etc. In fact, all U.S. underground coal mine entries are roof-bolted as required by law. However, roof falls still occur frequently in the roof bolted entries. The two possible reasons are: the lack of knowledge of and technology to detect the roof geological conditions in advance of mining, and lack of roof bolting design criteria for modern roof… more
Date: April 15, 2002
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: Roof bolting is the most popular method for underground openings in the mining industry, especially in the bedded deposits such as coal, potash, salt etc. In fact, all U.S. underground coal mine entries are roof-bolted as required by law. However, roof falls still occur frequently in the roof bolted entries. The two possible reasons are: the lack of knowledge of and technology to detect the roof geological conditions in advance of mining, and lack of roof bolting design criteria for modern roof… more
Date: July 15, 2003
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: Roof bolting is the most popular method for underground openings in the mining industry, especially in the bedded deposits such as coal, potash, salt etc. In fact, all U.S. underground coal mine entries are roof-bolted as required by law. However, roof falls still occur frequently in the roof bolted entries. The two possible reasons are: the lack of knowledge of and technology to detect the roof geological conditions in advance of mining, and lack of roof bolting design criteria for modern roof… more
Date: October 15, 2001
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: Roof bolting is the most popular method for underground openings in the mining industry, especially in the bedded deposits such as coal, potash, salt etc. In fact, all U.S. underground coal mine entries are roof-bolted as required by law. However, roof falls still occur frequently in the roof bolted entries. The two possible reasons are: the lack of knowledge of and technology to detect the roof geological conditions in advance of mining, and lack of roof bolting design criteria for modern roof… more
Date: April 15, 2003
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: In this quarter, the research effort is to develop the drill control unit (DCU) that acquire, store drilling parameters and control the drilling operation. The relevant publications have been reviewed and the methodology developed by previous researchers has been evaluated using the collected data in our laboratory and field tests conducted prior to the start of this project. Numerical modeling for exploring roof bolting mechanism has been started.
Date: April 15, 2001
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: In this quarter, the field, theoretical and programming works have been performed toward achieving the research goals set in the proposal. The main accomplishments in this quarter included: (1) one more field test has been conducted in an underground coal mine, (2) optimization studies of the control parameters have been conducted, (3) the relationship among feed pressure, penetration rate and rotation rate seems to be a good indicator for estimating rock strength when both penetration rate and… more
Date: April 15, 2005
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: A one-year non-cost extension has been granted for this project. In this quarter, the field, theoretical and programming works have been performed toward achieving the research goals set in the proposal. The main accomplishments in this quarter included: (1) laboratory tests have been conducted, (2) with the added trendline analysis method, the accuracy of the data interpretation methodology will be improved and the interfaces and voids can be more reliably detected, (3) method to use torque to… more
Date: April 15, 2004
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: Roof bolting is the most popular method for underground openings in the mining industry, especially in the bedded deposits such as coal, potash, salt etc. In fact, all U.S. underground coal mine entries are roof-bolted as required by law. However, roof falls still occur frequently in the roof bolted entries. The two possible reasons are: the lack of knowledge of and technology to detect the roof geological conditions in advance of mining, and lack of roof bolting design criteria for modern roof… more
Date: July 15, 2002
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: In this quarter, the field, theoretical and programming works have been performed toward achieving the research goals set in the proposal. The main accomplishments in this quarter included: (1) laboratory tests have been conducted, (2) with the added trendline analysis method, the accuracy of the data interpretation methodology will be improved, (3) method to use torque to thrust ratio as indicator of rock relative hardness has also been explored, and (3) about one half of the development work … more
Date: October 15, 2003
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: In this quarter, the field, theoretical and programming works have been performed toward achieving the research goals set in the proposal. The main accomplishments in this quarter included: (1) one more field test has been conducted in an underground coal mine, (2) optimization studies of the control parameters have been conducted, (3) method to use torque to thrust ratio as indicator of rock relative hardness has also been explored, and (4) about 98% of the development work for the roof geolog… more
Date: January 15, 2005
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: Roof bolting is the most popular method for underground openings in the mining industry, especially in the bedded deposits such as coal, potash, salt etc. In fact, all U.S. underground coal mine entries are roof-bolted as required by law. However, roof falls still occur frequently in the roof bolted entries. The two possible reasons are: the lack of knowledge of and technology to detect the roof geological conditions in advance of mining, and lack of roof bolting design criteria for modern roof… more
Date: July 15, 2001
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: Roof bolting is the most popular method for underground openings in the mining industry, especially in the bedded deposits such as coal, potash, salt etc. In fact, all U.S. underground coal mine entries are roof-bolted as required by law. However, roof falls still occur frequently in the roof bolted entries. The two possible reasons are: the lack of knowledge of and technology to detect the roof geological conditions in advance of mining, and lack of roof bolting design criteria for modern roof… more
Date: January 15, 2002
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: Roof bolting is the most popular method for underground openings in the mining industry, especially in the bedded deposits such as coal, potash, salt etc. In fact, all U.S. underground coal mine entries are roof-bolted as required by law. However, roof falls still occur frequently in the roof bolted entries. The two possible reasons are: the lack of knowledge of and technology to detect the roof geological conditions in advance of mining, and lack of roof bolting design criteria for modern roof… more
Date: October 15, 2002
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: Roof bolting is the most popular method for underground openings in the mining industry, especially in the bedded deposits such as coal, potash, salt etc. In fact, all U.S. underground coal mine entries are roof-bolted as required by law. However, roof falls still occur frequently in the roof bolted entries. The two possible reasons are: the lack of knowledge of and technology to detect the roof geological conditions in advance of mining, and lack of roof bolting design criteria for modern roof… more
Date: January 15, 2003
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
open access

Evaluation of Roof Bolting Requirements Based on In-Mine Bolter Drilling Progress Report

Description: In this quarter, the field, theoretical and programming works have been performed toward achieving the research goals set in the proposal. The main accomplishments in this quarter included: (1) laboratory tests have been conducted, (2) with the added trendline analysis method, the accuracy of the data interpretation methodology will be improved and the interfaces and voids can be more reliably detected, (3) method to use torque to thrust ratio as indicator of rock relative hardness has also bee… more
Date: January 15, 2003
Creator: Peng, Syd S.
Item Type: Refine your search to only Report
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