大采高综采工作面初采期间顶板活动规律监测分析研究  

Monitoring and analysis of roof movement law during initial mining of fully mechanized face with large mining height

作　　者：金峰 李岩 杨国强[5] 王宾昌 王元杰 陈法兵 JIN Feng;LI Yan;YANG Guoqiang;WANG Binchang;WANG Yuanjie;CHEN Fabing(China Coal Energy Group Co.,Ltd.,Beijing 100120,China;China Coal Engineering Mining Research Institute Co.,Ltd.,Beijing 100013,China;Coal Mining Branch,China Coal Research Institute,Beijing 100013,China;Coal Mining and Designing Department,Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China;China Coal Shanxi Yulin Energy and Chemical Co.,Ltd.,Yulin 719000,China)

机构地区：[1]中国中煤能源集团有限公司,北京100120 [2]中煤科工开采研究院有限公司,北京100013 [3]煤炭科学研究总院开采研究分院,北京100013 [4]天地科技股份有限公司开采设计事业部,北京100013 [5]中煤陕西榆林能源化工有限公司,陕西榆林719000

出　　处：《煤炭工程》2023年第3期63-67,共5页Coal Engineering

摘　　要：为了研究榆横矿区特大型矿井大采高综采工作面顶板活动规律,基于微震监测技术构建井上下微震联合监测台网,对大海则煤矿首采工作面初采期间初次来压、周期来压、“单面见方”以及推采速度四个影响因素影响条件下的顶板活动规律进行了研究,研究结果表明:顶板破裂峰值一般超前初次来压1天;顶板破裂频度(频次)与周期来压具有持续的相关性;当来压强度小于17000 kN时,顶板破裂强度(能量)与周期来压相关性较弱;工作面“单面见方”前26 m时出现顶板破裂频度峰值,顶板活动在“单面见方”16 m后逐渐趋于稳定,单面见方时顶板破裂高度达到最大值;当工作面推采速度≤1.6 m/d时,顶板破裂强度(微震能量、频次)始终处于极低的水平;当工作面推采速度为2.4~6.4 m/d时,顶板破裂逐渐增强,破裂强度(微震能量、频次)上限增加明显;当工作面推采速度≥7.2 m/d时,顶板破裂强度(微震能量、频次)的下限具有明显增加。In order to further understand the roof movement law of fully mechanized mining face with large mining height in Yuheng mining area,based on the microseismic monitoring technology,a joint monitoring of surface and underground microseismic monitoring network is constructed.,the roof movement law under the influence of four influencing factors including initial pressure,periodical pressure,“single side square”and mining speed in the first working face of Dahaize Coal Mine is studied.The results show that the peak of roof breakage is generally 1 day ahead of the first weighting;Continuous correlation between frequency of roof rupture and periodic weighting;The correlation between roof fracture strength(energy)and periodic weighting is weak when weighting strength is less than 17000 kN;The peak value of roof rupture appeared at 26 m before“single side square”,and the roof activity gradually stabilized after 16 m;When mining speed is no more than 1.6 m/d,the roof fracture is always at a low level;when mining speed is 2.4~6.4 m/d,the roof fracture gradually increases,and the upper limit of fracture strength increases obviously.When mining speed is more than or equal to 7.2 m/d,the lower limit of roof fracture strength is significantly increased compared with that in the medium-speed mining.

关 键 词：初采期间 微震监测 初次来压 周期来压 推采速度 

分 类 号：TD325[矿业工程—矿井建设]