煤矿安全2024，Vol.55Issue(7)：198-205,8.DOI:10.13347/j.cnki.mkaq.20230783
煤矿区复合地层等厚度水泥土截水帷幕性能的影响因素试验研究
Experimental study on influencing factors of performance of equal thickness soil-cement cut-off curtain in composite strata of coal mine area
石银斌 1杨志斌 2李文平 1王海 2吕文波 1惠磐科 2雷占1
作者信息
- 1. 国家能源集团乌海能源有限责任公司,内蒙古 乌海 016099
- 2. 中煤科工西安研究院(集团)有限公司,陕西 西安 710077
- 折叠
摘要
Abstract
In order to study the influence of cement content,comprehensive water-cement ratio,formation characteristics and other factors on the performance of equal thickness soil-cement cut-off curtain in coal mine,the principle analysis of equal thickness soil-cement curtain,the influencing factors of curtain performance analysis,the test and performance test of equal thickness soil-cement curtain were carried out,the key influencing factors were determined,the parameters of soil-cement of equal thickness in composite strata were obtained,and the field demonstration application was carried out.The results show that:the main factors affecting the performance of equal thickness soil-cement curtain were rock(soil)body properties,groundwater characteristics,cement cementi-tious materials,mixing process and curing conditions.Rock(soil)body properties and cement content were the direct factors affect-ing wall quality;water-cement ratio and curing period were the key factors to ensure wall quality.The ground layer had higher strength and better grain gradation,so the strength of soil-cement of equal thickness was higher and the permeability coefficient was smaller.According to the influencing factors,the cement content of the demonstration project was determined to be 25%,the com-prehensive water-cement ratio was 1.2:1,and the formation was composite formation material.The treatment results of the complex formation leakage section of the gentle slope inclined shaft in Luotuoshan Coal Mine showed that the three-step construction process was used to construct the outer water cutting curtain wall of the inclined shaft with good quality.The 28 d compressive strength of the field samples was 5.3-31.8 MPa,and the permeability coefficient was 0.005×10-7-0.240 3×10-7 cm/s.Wellbore water inflow decreased from 16.8 m3/h to about 1.6 m3/h,which was reduced by about 90.5%compared with before treatment.关键词
截水帷幕/等厚度水泥土/复合地层/斜井井筒/渗漏水/防治水Key words
cut-off curtain/equal thickness cement soil/composite strata/deviated well bore/leakage of water/water prevention and control分类
矿业与冶金引用本文复制引用
石银斌,杨志斌,李文平,王海,吕文波,惠磐科,雷占..煤矿区复合地层等厚度水泥土截水帷幕性能的影响因素试验研究[J].煤矿安全,2024,55(7):198-205,8.
