作者：王晓蕾1,2, 刘正武1,2, 李仁伟1,2, 袁印3
作者单位：1. 吕梁学院矿业工程系，山西 吕梁 033000;
2. 煤矿机械装备维护与检测试验吕梁市重点实验室，山西 吕梁 033000;
3. 河南理工大学能源科学与工程学院，河南 焦作 454000
关键词：矿业工程;密闭墙;采空区;改性材料
摘要：
为实现工作面采空区的有效密闭，以发泡剂和聚丙烯纤维为激发剂，利用硫铝酸盐水泥熟料、石灰、石膏制备的密闭墙构筑无机材料，通过力学性能和工作性能试验，寻找最优的原材料组合，并对材料进行工程应用研究。研究结果表明：三者合适的配比为硫铝酸盐水泥熟料50%、石灰10%、石膏40%，激发剂聚丙烯纤维为3 kg/m3，发泡剂0.06%；新型材料膨胀率为19.7%，抗压强度可达11.03 mpa，浆液初凝和终凝时间跨度大，能够满足不同工程需求；密闭墙构筑完成后，变形量较小，巷道整体处于稳定状态；密闭墙内部应力增加缓慢，受力平稳；密闭墙前瓦斯浓度保持在0.4%以下，与回风巷瓦斯浓度基本一致，密闭效果良好，可实现采空区的有效密闭。
rapid construction and effect analysis of closed wall in goaf based on modified materials
wang xiaolei1,2, liu zhengwu1,2, li renwei1,2, yuan yin3
1. department of mining engineering, lyuliang university, lüliang 033000, china;
2. key laboratory of maintenance and inspection of coal mine mechanical equipment of lüliang city, lüliang 033000, china;
3. school of energy science and engineering, henan polytechnic university, jiaozuo 454000, china
abstract: to realize the effective sealing of the working surface mining area. with foaming agent and polypropylene fiber as exciter, used the closed wall prepared by sulpho-aluminate cement clinker, lime, gypsum. through the mechanical performance and working performance test, to find the optimal combination of raw materials, and the material engineering application research. the results show that the appropriate ratio of the three is sulpho-aluminate cement clinker 50%, lime 10%, gypsum 40%, the stimulator polypropylene fiber was 3 kg/m3, bufoaming agent 0.06%. the expansion rate of the new materials was 19.7%, compressive strength was up to 11.03 mpa, the initial and final coagulation were large, ability to meet the different engineering needed. after the construction of the closed wall, less deformation amount, the overall roadway was in a stable state. the internal stress of the confined walls increases slowly, stable force response. the gas concentration before the closed wall was kept below 0.4%, it was basically consistent with the gas concentration in the return wind lane, good sealing sealing sealing. the effective sealing of the mining area was realized.
keywords: mining engineering;closed wall;goaf;modified materials
2023, 49(4):146-150,158 收稿日期: 2021-06-07;收到修改稿日期: 2021-10-29
基金项目: 山西省高等学校科技创新项目（2019l0954）；吕梁市重点研发项目（2022gxyf10）
作者简介: 王晓蕾(1986-),男,山东烟台市人,副教授,博士,研究方向为煤矿安全
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