采矿与安全工程学报 ›› 2016, Vol. 33 ›› Issue (2): 220-225.

• 论文 • 上一篇    下一篇

关键层的复合效应及其对矿压显现的影响

  

  1. 1.安徽理工大学能源与安全学院,煤矿安全高效开采省部共建教育部重点实验室,安徽 淮南 232001; 2.中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏 徐州 221116; 3.安徽理工大学地球与环境学院,安徽 淮南 232001
  • 收稿日期:2014-09-16 出版日期:2016-03-15 发布日期:2016-04-22
  • 作者简介:付宝杰(1976—),男,内蒙古自治区赤峰市人,博士,讲师,从事采动岩体力学方面的研究。
  • 基金资助:

    国家自然科学基金项目(51574007,51421003);中国矿业大学深部岩土力学与地下工程国家重点实验室开放基金项目 (SKLGDUEK1509);山东科技大学校杰出青年基金项目(2014JQJH105);霍英东青年教师基金项目(141046)

Composite effect of key stratum and its influence on strata behaviors

  • Received:2014-09-16 Online:2016-03-15 Published:2016-04-22

摘要: 为分析相邻关键层组合运动对采场矿压产生的影响,揭示关键层复合效应产生的机理,利用并行电法测试技术系统研究了两关键层临近赋存顶板破坏特征及其破断规律,并通过与该测试段工作面矿压数据相互印证,确定关键层复合效应使采场来压步距呈一大一小周期性变化。由此,建立了该类型采场覆岩的空间结构模型,按该模型中关键块体结构关系计算得出的工作面支架工作阻力值与实测结果基本吻合,这为同类地质条件下采场围岩控制提供依据。

关键词: 关键层, 复合效应, 空间结构, 矿压显现

Abstract: In order to analyze the effect of movement of key neighboring strata on the pressure of longwall mining, and reveal the mechanism of the composite effect of key stratum, failure characteristics of two key neighboring strata and broken law have been studied by using electrical testing technology. And through making the characteristics verified by the pressure data in the test section, the paper has figured out that the stope pressure step is of a big and a small periodical change under the influence of the composite effect of key strata. Thus, the spatial structure model of the type of overlaying strata has been established. According to the structural relationship of key blocks in the model, the support working values of the working faces have been obtained, which have turned out to be in accordance with the measured results, and finally has offered basis of the control of surrounding rock under similar geological conditions.

Key words: key stratum, composite effect, spatial structure, strata behaviors