A probabilistic method for predicting the formation of key blocks

Mining Science and Technology Pub Date : 1991-09-01 DOI:10.1016/0167-9031(91)91310-E

D.B. Tyler, R. Trueman, R.J. Pine

{"title":"A probabilistic method for predicting the formation of key blocks","authors":"D.B. Tyler, R. Trueman, R.J. Pine","doi":"10.1016/0167-9031(91)91310-E","DOIUrl":null,"url":null,"abstract":"<div><p>Probabilistic distributions have been fitted to joint mapping data obtained from South Crofty tin mine. This allowed a simple deterministic model of rock jointing to be developed. Using this model, key block analysis of the 380 Fm level footwall drive, of the No. 8 lode was carried out. The inherent limitations present in this simplified analysis are noted and the need for a probabilistic approach to key block formation is shown. The limitations of existing probabilistic methods of analysis are also examined. A different form of probabilistic analysis for key block determination has been developed using the computer code B3LHS. This method does not suffer from the inadequacies associated with other methods of probabilistic analysis.</p><p>A comparison was made between the results from B3LHS and deterministic key block analysis. It was found that this new model predicted the formation of more key block types than could be generated using the deterministic model. In addition, the probability of the formation of key blocks can now be determined. Threshold values have been suggested that link the probability of key block formation with the use of specialist or non specialist staff in the implementation of rock bolt support.</p></div>","PeriodicalId":100929,"journal":{"name":"Mining Science and Technology","volume":"13 2","pages":"Pages 145-156"},"PeriodicalIF":0.0000,"publicationDate":"1991-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0167-9031(91)91310-E","citationCount":"11","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mining Science and Technology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/016790319191310E","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 11

Abstract

Probabilistic distributions have been fitted to joint mapping data obtained from South Crofty tin mine. This allowed a simple deterministic model of rock jointing to be developed. Using this model, key block analysis of the 380 Fm level footwall drive, of the No. 8 lode was carried out. The inherent limitations present in this simplified analysis are noted and the need for a probabilistic approach to key block formation is shown. The limitations of existing probabilistic methods of analysis are also examined. A different form of probabilistic analysis for key block determination has been developed using the computer code B3LHS. This method does not suffer from the inadequacies associated with other methods of probabilistic analysis.

A comparison was made between the results from B3LHS and deterministic key block analysis. It was found that this new model predicted the formation of more key block types than could be generated using the deterministic model. In addition, the probability of the formation of key blocks can now be determined. Threshold values have been suggested that link the probability of key block formation with the use of specialist or non specialist staff in the implementation of rock bolt support.

查看原文本刊更多论文

预测关键区块形成的概率方法

对南克罗菲蒂锡矿联合测图数据进行了概率拟合。这使得一个简单的岩石节理确定性模型得以发展。利用该模型对8号矿脉380 Fm水平下盘驱进行了关键块体分析。指出了这种简化分析中存在的固有局限性，并指出了对关键区块形成的概率方法的必要性。现有的概率分析方法的局限性也进行了检查。使用计算机代码B3LHS开发了一种不同形式的概率分析来确定密钥块。这种方法没有其他概率分析方法的不足之处。将B3LHS分析结果与确定性键块分析结果进行了比较。结果表明，与确定性模型相比，该模型能够预测出更多的关键区块类型。此外，现在可以确定关键区块形成的概率。已经提出了临界值，将关键块体形成的概率与在实施锚杆支护时使用专家或非专业人员联系起来。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Mining Science and Technology

自引率

0.00%

发文量