近距离采空区下特厚煤层综放工作面矿压规律  

Strata Behavior Regularity of Fully Mechanized Top Coal Caving Mining Face of Extra-thick Coal Seam Under Close Goaf

作　　者：戴文祥 孔令海 邓志刚[2,3] 赵善坤 DAI Wenxiang;KONG Linghai;DENG Zhigang;ZHAO Shankun(Tashan Mine,China Coal Datong Energy Co.,Ltd.,Datong 037000,China;Mine Safety Technology Branch of China Coal Research Institute,Beo'ing 100013,China;National Key Lab of Coal Resources High Efficient Mining and Clean Utilization(China Coal Research Institute),Beijing 100013,China)

机构地区：[1]中煤大同能源有限责任公司塔山煤矿,山西大同037000 [2]煤炭科学技术研究院有限公司安全分院,北京100013 [3]煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院),北京100013

出　　处：《煤矿安全》2018年第12期212-215,220,共5页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51304117;51704165);国家重点研究发展计划资助项目(2017YFC0804203);中煤科工集团科技创新基金重点资助项目(2014ZD008)

摘　　要：为得到极近距离采空区下15 m以上特厚煤层综放工作面矿压规律,以中煤大同塔山煤矿3-5#煤层首采工作面为工程背景,通过微震监测和支架阻力实测,综合研究得到:受极近距离采空区的影响,工作面上覆岩层表现出"缓沉运动"的特点;工作面推进过程中的整体来压强度较小,支架来压步距离散性较大、规律性不强;工作面来压期间动载系数平均1.19～1.22,矿压表现为准静压特点,支架工作状态较稳定。In order to obtain strata behavior regularity of fully mechanized top coal caving mining face in the extra-thick coal seam below 15 m in the very short-distance goaf, the first workface of 3-5#coal seam in China Coal Energy Datong Tashan Coal Mine is taken as the engineering background, and through the use of microseismic monitoring technology and hydraulic support working resistance monitoring technology, the study obtained the following results: under the influence of overlying coal seam mining, the overburden strata shows the characteristics of "slow movement"; the overall compressive strength is small during the mining process of the working face, and the periodic weighting distance of the support is greater and the regularity is not strong;the working face strata appears as quasi-static pressure, and the working condition of the support is relatively stable. The dynamic load factor of the support during the periodic weighting is 1.19 to 1.22. The results could provide reference for safe and efficient mining of fully mechanized caving mining face in ectra-thick seam under similar conditions.

关 键 词：近距离采空区 特厚煤层 综放开采 矿压规律 微震监测 支架工作阻力 

分 类 号：TD323[矿业工程—矿井建设]