磷石膏基自产气膨胀浆体自膨胀扩散特性研究

doi:10.16265/j.cnki.issn1003-3033.2025.07.1208

中国安全科学学报 ›› 2025, Vol. 35 ›› Issue (7): 82-90.doi: 10.16265/j.cnki.issn1003-3033.2025.07.1208

磷石膏基自产气膨胀浆体自膨胀扩散特性研究

丁仰卫¹(), 杨海龙¹, 鲁义²^,^**(), 刘蔚廷², 谷旺鑫², 夏楚淇²

¹ 山东鲁泰控股集团有限公司鹿洼煤矿, 山东济宁 272350
² 湖南科技大学资源环境与安全工程学院, 湖南湘潭 411201

收稿日期:2025-03-14 修回日期:2025-05-18 出版日期:2025-07-28
通信作者:
** 鲁义(1986—),男,江西新干人,博士,教授,主要从事煤自燃与瓦斯灾害防治方面的研究。E-mail: luyijx@163.com。
作者简介:

丁仰卫 (1979—),男,山东汶上人,本科,高级工程师,主要从事矿井通风与防灭火方面的工作。E-mail: dyw791220@163.com。
基金资助:
国家自然科学基金资助(52374200); 国家自然科学基金资助(52274196); 国家自然科学基金资助(52174180); 国家重大人才工程青年项目(2022QB06801)

Study on spontaneous expansion and diffusion characteristics of phosphogypsum based self-produced gas expansion slurry

DING Yangwei¹(), YANG Hailong¹, LU Yi²^,^**(), LIU Weiting², GU Wangxin², XIA Chuqi²

¹ Luwa Coal Mine, Shandong Lutai Holding Group Co., Ltd., Jining Shandong 272350, China
² College of Resources, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan Hunan 411201, China

Received:2025-03-14 Revised:2025-05-18 Published:2025-07-28

摘要/Abstract

摘要：

为提高磷石膏基自产气膨胀浆体的注浆效率和准确性,分析磷石膏基自产气膨胀浆体密度随时间的变化,基于流体力学理论和浆体密度时变模型,建立浆体在自产气膨胀阶段的渗流扩散压力数学模型。通过自行搭建的磷石膏基自产气膨胀浆体相似模型试验系统,研究裂隙网络中磷石膏基自产气膨胀浆体在自膨胀阶段的渗流压力变化,修正浆体渗流扩散压力数学模型,验证修正后的渗流扩散压力数学模型的合理性。研究结果表明:浆体密度随时间变化趋势符合负指数幂特征;在自膨胀过程中,浆体扩散面积越来越大,浆体扩散面积的增幅越来越小;监测点的渗流压力的理论结果与试验结果的相对误差不超过10%,证明修正后的渗流扩散压力数学模型具有合理性。

关键词: 磷石膏基自产气膨胀浆体, 自膨胀, 扩散特性, 浆体密度, 相似模型试验

Abstract:

In order to improve the grouting efficiency and accuracy of phosphogypsum based self-produced gas expansion slurry, the change in density of phosphogypsum based self-produced gas expansion slurry with time was analyzed. Based on fluid mechanics theory and the time-varying model of slurry density, a mathematical model of the seepage diffusion pressure of the slurry during the self-produced gas expansion stage was established. Through a self-built phosphogypsum based self-produced gas expansion slurry similar model experiment system, the seepage pressure variation of phosphogypsum based self-produced gas expansion slurry in the fracture network during the self expansion stage was studied, and the mathematical model of the seepage diffusion pressure of the slurry was modified to verify the rationality of the modified mathematical model of seepage diffusion pressure. The results show that the trend of slurry density over time follows a negative exponential power characteristic. During the self expansion process, the diffusion area of the slurry increases and the increase in diffusion area of the slurry becomes smaller and smaller. The relative error between the theoretical and experimental results of the seepage pressure at the monitoring point does not exceed 10%, proving the rationality of the modified mathematical model for seepage diffusion pressure.

Key words: phosphogypsum-based self-produced gas-expanded slurry, self expansion, flow characteristics, slurry density, similar model experiment

中图分类号:

丁仰卫, 杨海龙, 鲁义, 刘蔚廷, 谷旺鑫, 夏楚淇. 磷石膏基自产气膨胀浆体自膨胀扩散特性研究[J]. 中国安全科学学报, 2025, 35(7): 82-90.

DING Yangwei, YANG Hailong, LU Yi, LIU Weiting, GU Wangxin, XIA Chuqi. Study on spontaneous expansion and diffusion characteristics of phosphogypsum based self-produced gas expansion slurry[J]. China Safety Science Journal, 2025, 35(7): 82-90.

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监测点序号	X/mm	Y/mm
1	250	0
2	177	177
3	177	-177
4	350	0
5	247	247
6	247	-247
7	450	0
8	318	318
9	318	-318

监测点名称	时间/s	渗流压力/kPa
1号	2	15.471
2号	2	15.983
3号	2	15.781
4号	36	0.097
5号	37	0.193
6号	38	0.202
7号	510	0.013
8号	507	0.011
9号	522	0.018

监测点	1号	3号	4号	6号	7号	9号
首次数据记录时间/s	2	2	36	38	510	522
初始半径r₀/mm	250	250	250	250	250	250
扩散距离/mm	250	250	350	350	450	450
公式预测值/kPa	14.292	14.292	0.088	0.192	0.012	0.017
试验结果/kPa	15.471	15.781	0.097	0.202	0.013	0.018
相对误差/%	7.621	9.435	9.278	4.950	7.692	5.556

磷石膏基自产气膨胀浆体自膨胀扩散特性研究

Study on spontaneous expansion and diffusion characteristics of phosphogypsum based self-produced gas expansion slurry

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