综放架后膏体充填空间实测与顶煤冒放性影响规律研究  

Study on Measurement of Paste Filling Space and Influence Law of Caving Property of Top Coal after Fully Mechanized Caving Support

作　　者：陈存强[1] 谭家贵 杨康 吕浩南 曹津铭 韩雨 白雨 顾雷雨 高利晶 CHEN Cunqiang;TAN Jiagui;YANG Kang;LYU Haonan;CAO Jinming;HAN Yu;BAI Yu;GU Leiyu;GAO Lijing(Mining Branch,Huaneng Yunnan Diandong Energy Co.,Ltd.,Qujing 655000,China;School of Mines,China University of Mining and Technology,Xuzhou 221116,China;Huaneng Coal Technology Research Co.,Ltd.,Beijing 100000,China)

机构地区：[1]华能云南滇东能源有限责任公司矿业分公司,云南曲靖655000 [2]中国矿业大学矿业工程学院,江苏徐州221116 [3]华能煤炭技术研究有限公司,北京100000

出　　处：《煤炭技术》2024年第7期53-57,共5页Coal Technology

基　　金：华能集团总部科技项目(HNKJ20-H36)。

摘　　要：针对综合机械化放顶煤开采中的矸石处置问题,提出了一种放顶煤架后膏体充填方法,设计了柳巷煤矿综放工作面采空区空洞现场监测方案,定性分析了5个方面对顶煤冒放性的影响,采用PFC^(2D)数值模拟方法,定量分析了充填高度对顶煤冒放性的影响。研究结果表明:倾向方向上工作面上部端头附近采空区空洞体积最大,走向方向上工作面刚推进到新位置时采空区空洞体积最大,支架顶梁后方空洞体积大于支架尾梁上方;充填高度从0增加至3 m时,顶煤放出率由92.56%降低至86.11%,降低了6.45个百分点,顶煤含矸率由13.94%降低至13.17%,降低了0.77个百分点,相比于顶煤含矸率,充填高度对顶煤放出率影响较大。研究可为类似地质条件综放架后膏体充填开采实现提供理论基础。Aiming at the problem of gangue disposal in fully mechanized top coal caving mining,propose a paste filling method after top coal caving frame,designs a field monitoring scheme for goaf cavity in fully mechanized top coal caving face of Liuxiang coal mine,qualitatively analyzes the influence of five aspects on top coal caving,and quantitatively analyzes the influence of filling height on top coal caving by PFC^(2D) numerical simulation method.The results show that the cavity volume in the goaf near the upper end of the working face is the largest in the tendency direction,and the cavity volume in the goaf is the largest when the working face is just pushed to a new position in the strike direction.The cavity volume behind the top beam of the support is larger than that above the tail beam of the support.When the filling height increases from 0 to 3 m,the top coal release rate decreases from 92.56%to 86.11%,which decreases by 6.45 percentage points,and the top coal gangue content decreases from 13.94%to 13.17%,which decreases by 0.77 percentage points.Compared with the top coal gangue content,the filling height has a great influence on the top coal release rate.The research can provide a theoretical basis for the realization of paste filling mining after fully mechanized caving under similar geological conditions.

关 键 词：放顶煤膏体充填开采 采空区 顶煤冒放性 现场监测 数值模拟 

分 类 号：TD823[矿业工程—煤矿开采]