文献类型：期刊文献

中文题名：煤矿高水充填材料物理力学特性研究及工程应用

英文题名：Research and engineering application on physical and mechanical properties of coal mine high water fillingg materials

作者：吴少康 张俊文 徐佑林 宋治祥 范文兵 张杨 董续凯 陈志松 肖兵 张际涛

第一作者：吴少康

机构：[1]中国矿业大学(北京)能源与矿业学院,北京100083;[2]贵州理工学院矿业工程学院,贵州贵阳550003;[3]贵州大学矿业学院,贵州贵阳5550025;[4]贵州黔诚力锦科技有限公司,贵州贵阳550081

第一机构：中国矿业大学(北京)能源与矿业学院,北京100083

年份：2023

卷号：40

期号：4

起止页码：754-763

中文期刊名：采矿与安全工程学报

外文期刊名：Journal of Mining & Safety Engineering

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

基金：国家自然科学基金项目(52034009,51974319);越崎杰出学者项目(2020JCB01)。

语种：中文

中文关键词：高水材料;沿空留巷;巷旁充填;物理力学性能;充填工艺

外文关键词：high-water material;gob-side entry retained;roadside backfilling;physical and mechanical properties;filling process

摘要：为解决沿空留巷传统膏体、充填材料的充填开采成本高、施工工艺复杂、充填体支护强度达不到现场要求等问题,通过实验室试验对材料各方面物理力学性能进行研究,并应用于煤矿现场。研究表明,自主研发的高水材料具有流动性能好、增阻快、早期强度高及适应于煤矿现场环境等优点。主材料比例和初始水温对材料性能的影响大:当pH=11.8时,强度最大,超过或低于这一pH值时强度均减小;当初始水温达到18℃临界值时,试件反应后可达到的峰值温度为48℃,且材料强度在初期和后期的残余强度均可达到最佳,而当峰值温度高于或低于48℃时,材料性能呈下降趋势。材料强度受是否养护影响较大,试件长时间暴露在空气中会发生放碱现象,整体强度下降,养护与未养护下的材料强度相差2 MPa左右。研究得出高水材料巷旁充填的一整套体系,应用于煤矿现场,取得良好效果。
In order to solve the problems such as high cost of filling mining of traditional paste and filling material along gob retaining roadway,complex construction technology,and insufficient support strength of filling material to meet field requirements,laboratory tests on physical and mechanical properties of materials in all aspects and field application process are carried out.The independently developed high-water materials have the characteristics of good flow performance,fast resistance increase,high early strength and high adaptation to the coal mine site environment.Different proportions of the main material and the initial water temperature have a great influence on the properties of the material.When pH=11.8,the strength reaches the maximum and decreases when the pH value is above or below it.When the initial water temperature reaches the critical value of 18℃,the peak temperature after reaction is 48℃,and the residual strength of the material can reach the best in the early and late stages.When the peak temperature is higher or lower than 48℃,the material properties show a decreasing trend.The material strength is greatly affected by whether the material is cured or not.When the specimen is exposed to air for a long time,alkali release occurs,and the overall strength decreases.The different in strength under curing and uncuring is about 2 MPa.A complete set of high-water material side filling system is obtained,which is applied to the coal mine site and achieves good results.