摘要
为解决煤层开采过程中煤壁片帮问题,综合运用理论分析、试验研究等方法对浅壁注水工艺进行了可行性分析,并在开元煤炭有限责任公司9714工作面进行了现场实践。结果表明:浅壁注水能够在工作面前方形成一层抗剪强度较高的粘结层,可提高煤壁的整体性与稳定性;当煤体含水率在2%~12%区间内时,内聚力和抗剪强度两项力学性能指标随着含水率的增加而逐渐递增,煤体抗压强度则与含水率呈反比关系;煤层浅壁注水工艺实施后煤壁片帮冒顶事故较过去降低了80%,片帮深度和影响范围也大幅缩减。
To solve the rib spalling in coal wall during coal seam mining,the paper makes a feasibility analysis of shallow-wall water injection technique through theoretical analysis and experimental study at 9714 working face of Kaiyuan Coal Co.,Ltd.,whose field practice shows that it can form a high-shear-strength adhesive coat ahead of the working face to improve the integrity and stability of coal wall;two mechanical properties of cohesion and shear strength will gradually increase with the increase of water content while the compression strength is inversely related to water content,decreasing the rib spalling by 80%with a remarkable reduction of rib spalling depth and impact range.
作者
薛霄飞
Xue Xiaofei(Kaiyuan Coal Co.,Ltd.,Huayang New Material Technology Group,Jinzhong,Shanxi,045400)
出处
《江西煤炭科技》
2021年第4期17-18,24,共3页
Jiangxi Coal Science & Technology
关键词
煤壁片帮
浅壁注水
黏结层
内聚力
rib spalling in coal wall
shallow-wall water injection
adhesive coat
cohesion
