摘要
为了研究立井工作面化学注浆浆液的扩散机理,采用新型透明土模型及无损光学观测技术,并设计了化学注浆模拟装置,利用激光与CCD相机完成了透明土模型内部的渗透注浆过程可视化。图像结果显示化学浆液在重力作用下呈"梨形"扩散,即垂向扩散距离大于横向扩散距离,与传统"球形"扩散理论有所不同。以在建的核桃峪煤矿立井为例,依据模型试验结果提出了化学注浆治理立井工作面二次涌水的注浆孔设计方法,即偏安全考虑减小群孔间距。工程施工结束后,整个井筒工作面涌水量由施工前大于30 m^3/h降到小于3 m^3/h,堵水率达90%,达到了防水堵漏的要求。
In order to study the diffusion mechanism of the chemical grouting for the coal mining face in the underground mine,a new transparent soil model and nondestructive optical observation technology were applied. A chemical grouting simulation device was designed and the laser and CCD camera were applied to complete the visualization of the penetration grouting process of the transparent soil model. The image results showed that under the role of the gravity,the chemical grout would be diffused in a pear shape,the vertical diffusion distance would be longer than the lateral diffusion distance and would be different to the conventional ball shape diffusion theory. Based on a mine shaft in construction of Hetaoyu Mine as a case,according to the test results of the model,a grouting borehole design method was provided with the chemical grouting to control the secondary water inflow of the working face in the mine shaft and the space distance between the group boreholes was reduced. After the engineering construction completed,the total water inflow of the mine shaft working face were reduced from over 30 m^3/ h before the construction to 3 m^3/ h and the water sealing rate was 90%. The requirements of the water prevention and leakage sealing were reached and could ensure the mine shaft safety.
出处
《煤炭科学技术》
CAS
北大核心
2016年第6期194-199,共6页
Coal Science and Technology
基金
国家自然科学基金面上资助项目(41472268)
江苏省普通高校研究生科研创新计划资助项目(CXZZ12_0946)
关键词
透明土
化学浆液
井筒涌水
注浆防治水
transparent soil
chemical grout
water inflow in mine shaft
water prevention and control with grouting
