东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (9): 1322-1325.DOI: -

• 资源与土木工程 • 上一篇    下一篇

地下采场破碎岩体稳定性评价与参数优化

董金奎1，冯夏庭1，张希巍1，张忠辉1,2   

  1. (1东北大学深部金属矿山安全开采教育部重点实验室，辽宁沈阳110819；2山东黄金集团有限公司，山东济南250014)
  • 收稿日期:2013-04-03 修回日期:2013-04-03 出版日期:2013-09-15 发布日期:2013-04-22
  • 通讯作者: 董金奎
  • 作者简介:董金奎(1964-)，男，山东莱州人，东北大学博士研究生；冯夏庭(1964-)，男，安徽潜山人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51274055，51204030，51204031)；国家“十二五”科技支撑计划项目(2013BAB02B01，2013BAB02B03)；中央高校基本科研业务费专项资金资助项目(N110401003，N110501001).

Stability Evaluation and Parameter Optimization on the Fractured Rock Mass Around Underground Stope

DONG Jinkui1， FENG Xiating1， ZHANG Xiwei1， ZHANG Zhonghui1,2   

  1. 1. Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines， Northeastern University， Shenyang 110819， China； 2. Shandong Gold Group Co.Ltd.， Jinan 250014， China.
  • Received:2013-04-03 Revised:2013-04-03 Online:2013-09-15 Published:2013-04-22
  • Contact: ZHANG Xiwei
  • About author:-
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摘要： 以焦家金矿试验采场为工程依托，开展缓倾斜中厚破碎矿体采场稳定性分析.通过对焦家金矿-390m中段试验采场的工程地质调查、矿岩力学性质试验，获得了表征矿山岩体工程质量的多种指标；应用岩石质量Q分级和RMR分级系统，对试验采场岩体稳定性进行评价分析；基于修正的Mathews稳定图法和临界跨度设计法，对采场暴露面尺寸和最大跨度进行优化.分析认为，当回采进路跨度小于8m时即可保证采场的稳定性.将所得到的结果应用于现场工业试验，现场采用暴露面尺寸为75m×15m的进路进行回采，采用现场观测的手段进行回采过程的监测.结果表明，在回采过程中进路的顶板及围岩并未发生垮落及剥落现象，采场围岩稳定性良好.

关键词: Mathews稳定图, 采场稳定性, 岩体分级, 采场跨度, 临界跨度法

Abstract: The stope stability analysis of test stope in the gently inclined ore body with medium thickness was carried out in the Jiaojia Gold Mine， Shandong Province. By means of the engineering geologic investigation and rock mechanics experiments at the -390m level， many mechanical indexes which reflect the quality of engineering rock mass were acquired. On the basis of the mass data analysis， applying of “Q” and “RMR” rock mass quality classification， rock mass rating model was established. According to the rock mass rating model， together the revised Mathews stability graph and the critical span design method， maximum exposed surface size of stope and maximum span were obtained. Through this great amount of analysis， it will guarantee the stability of stope when the span of stoping drift is less than 8m. The result was applied to the industry test， there the exposed surface size is designed as 75m×15m， and the insitu observation is used to monitor the mining process. The monitoring indicated that the caving and spalling of roof or sidewall do not occurred during the mining，and the stability of stoping drift is guaranteed.

Key words: Mathews stability graph, stability of stope, rock mass classification, span of stoping drift, critical span method

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