|
|
|
| Research on gob-side entry retaining technology with high water material filling in large depth fully mechanized mining face |
| Niu Qinghai |
| Wutongzhuang Mine, Jizhong Energy Fengfeng Group Co.， Ltd.， Handan 056011， China |
|
|
|
|
Abstract Gob-side entry retaining technology has significant advantages in improving coal recovery efficiency, alleviating the tension of mining connection and improving the ventilation system of working face. Compared with other roadway filling, high water filling material has the advantages of short solidification time, high early strength, fast resistance increasing speed and large longitudinal deformation ability. Taking the 182605 lower working face of Wutongzhuang Mine as the engineering background, the roof of the gob-side entry retaining roadway was strengthened to ensure the integrity and stability of the roadway roof. The roof of the roadway was cut in advance to release the roof energy by blasting pressure relief, so as to realize the roof cutting along the goaf. Using the mechanical model of gob-side entry retaining, combined with the actual production geological conditions of the working face under 182605 and the mechanical parameters of coal and rock mass, the minimum working resistance of the roadway was 7.2 MN / m. Through the mechanical properties test of the specimens, it wa concluded that the water-cement ratio of high water material was inversely proportional to the uniaxial compressive strength of the specimens. Considering the strength of the filling body, field operation and economic benefits, the water-cement ratio of high water material was 1.8: 1. According to the observation and analysis of the surrounding rock of the roadway on site, the rear of the working face was divided into slow deformation zone, significant deformation zone and stable deformation zone. The successful practice of gob-side entry retaining with high water material in under 182605 working face had achieved good technical and economic benefits and social benefits, and had certain popularization and application value.
|
|
|
|
|
|
| [ 1 ] 康红普，牛多龙，张 镇，等. 深部沿空留巷围岩变形特征与支护技术[ J ]. 岩石力学与工程学报，2010，29（ 10 ）：1 977 - 1 987.
[ 2 ] 柏建彪，周华强，侯朝炯，等. 沿空留巷巷旁支护技术的发展[Ｊ]. 中国矿业大学学报，2004，33（ 2 ）：183 - 186.
[ 3 ] 陈 勇，柏建彪，王襄禹，等. 沿空留巷巷内支护技术研究与应用[Ｊ]. 煤炭学报，2012，37（ 6 ）：903 - 910.
[ 4 ] 康红普，张 晓，王东攀，等. 无煤柱开采围岩控制技术及应用[Ｊ]. 煤炭学报，2022，47（ 1 ）：16 - 29.
[ 5 ] 匡中文. 薄基岩地质条件下中厚煤层柔模混凝土沿空留巷矿压显现规律分析与应用[Ｊ]. 煤炭技术，2021，40（ 11 ）：66 - 69.
[ 6 ] 杨计先. 沿空留巷空间“小”结构稳定性控制研究及应用[Ｊ]. 煤炭工程，2021，53（ 9 ）：36 - 41.
[ 7 ] 卞 卡，柏建彪，赵 涛，等. 综采工作面高水材料空巷充填技术与应用[Ｊ]. 煤炭技术，2021，40（ 5 ）：37 - 40.
[ 8 ] 张自政，柏建彪，陈 勇，等. 沿空留巷不均衡承载特征探讨与应用分析[Ｊ]. 岩土力学，2015，36（ 9 ）：2 665 - 2 673.
[ 9 ] 李 波， 陈国旗，董仁浩，等. 高水材料充填沿空留巷技术的研究与应用[Ｊ]. 煤炭科技，2015（ 3 ）：67 - 69.
[ 10 ] 孟晓强 ，胡成军 ，靳志新，等. 沿空留巷巷旁高水充填数值模拟分析[Ｊ]. 煤炭与化工，2018，41（ 11 ）：28 - 30.
[ 11 ] 陈 勇. 沿空留巷围岩结构运动稳定机理与控制研究[ D ]. 徐州：中国矿业大学，2012.
[ 12 ] 宋江涛. 慈林山煤矿高水材料巷旁充填沿空留巷技术研究[ J ]. 山西煤炭，2010，42（ 1 ）：68 - 75. |
|
|
|
