采矿与安全工程学报 ›› 2016, Vol. 33 ›› Issue (1): 102-108.

• 论文 • 上一篇    下一篇

近距离煤层开采对卸压区采场围岩应力演化过程研究

  

  1. 安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,能源与安全学院,安徽 淮南 232001
  • 收稿日期:2014-04-02 出版日期:2016-01-15 发布日期:2016-03-01
  • 作者简介:刘增辉(1975—),男,山西省芮城市人,副教授,博士后,从事岩石力学与采矿工程方面的研究。
  • 基金资助:

    国家自然科学基金项目(51174005);国家自然科学基金委员会与神华集团有限公司联合项目(51174255);高等学校博士学科点专项科研基金项目新教师类(20123415120006);高校优秀青年人才支持计划重点项目(gxyqZD2016085);安徽高校省级自然科学研究重点项目(KJ2013Z293);安徽省博士后研究人员科研活动经费项目(DG082)

Mining affect of close distance coal seam to surrounding rock stress evolution of coal face in distressed zone

  • Received:2014-04-02 Online:2016-01-15 Published:2016-03-01

摘要: 为了研究近距离煤层开采围岩应力演化特征,以淮北海孜煤矿的 8煤层 762工作面和 9煤层首采 962工作面的地质和开采条件为研究背景,建立了三维数值计算模型,对 762和 962工作面开采造成的围岩应力相互影响进行了研究。结果表明:762 工作面开采对底板卸压应力基本是以线性降低,在 962工作面下平巷形成卸压; 762工作面长度缩短对 962工作面的解压效果降低,同时 762工作面侧向底板集中应力和 962工作面的超前支承压力相互叠加;通过在回采巷道内测试煤岩体的电磁辐射脉冲数,验证了采动影响下围岩应力演化。

关键词: 近距离煤层, 采动应力演化, 电磁辐射

Abstract: To study stress evolution characteristics of surrounding rock in mining process of close dis- tance coal seams, according to the geological and mining conditions of 762 working face of No.8 coal seam and 962 working face of No.9 coal seam in Haizi coal mine, Huaibei mining group, three-dimensional numerical model was established to study the interaction of surrounding rock stress between the mining operation of 762 and 962 working faces. The results show that floor relief stress of 762 working face exhibits a nearly linear decrease, and forms relief zone in the headgate of 962 working face. The length shortening of 762 working face reduces the distressing effect to 962 working face, and the floor lateral concentration stress of 762 working face and the abutment pressure of 962 working face are superimposed. The pulse numbers of electromagnetic radiation monitored in gateways verifies the mining stress evolution of surrounding rock.

Key words: close distance coal seam, mining-induced stress development, electromagnetic emission