Experimental research and application of high pressure spray cooling in long distance coal mining face
JI Zhaoyang;CHEN Xiujie;FENG Qian;ZHANG Yiran;MIAO Dejun
陕西麟北煤业开发有限责任公司 园子沟矿山东科技大学 安全与环境工程学院山东科技大学 省部共建矿山岩层智能控制与绿色开采国家重点实验室
针对园子沟矿井1012102采煤工作面高温热害问题,采用喷雾降温实验确定最佳喷雾压力和喷嘴雾化参数,数值模拟分析不同喷雾温度和喷雾间距对降温效果的影响,并采用线性回归方法分析了采用喷雾前后人体的舒适度。结果表明:当综采工作面中喷雾系统采用组间距10 m,水温为286 K,压力6 MPa的参数时,单组峰值温度与常规通风方式的温差达到了1.3 ℃。在现场应用后,工作面人行道侧大部分区域的温度低于26 ℃,最高气温降至27 ℃以下,最低温度低至24.7 ℃,有效实现了区域降温。
For the problem of high temperature heat damage at 1012102 working face in Yuanzigou Mine, the best spray pressure and nozzle atomization parameters are determined by using the method of spray cooling experiment. The numerical simulation method is used to simulate and analyze the influence of different spray temperature and spray spacing conditions on the cooling effect, and the comfort of human body before and after spray is used to analyze by the linear regression method. The results show that: when the spraying system in the synthesized mining face adopts the group spacing of 10 m, the water temperature is 286 K, and the pressure is 6 MPa, the single group peak temperature reaches 1.3 ℃ compared with the conventional ventilation method. After the application in the field, the temperature of most areas on the sidewalk side of the working face was lower than 26 ℃, the maximum temperature dropped to below 27 ℃, the minimum temperature was as low as 24.7 ℃, which effectively realized the regional cool.
high-temperature coal mining face;spray cooling;numerical simulation;spraying system;heat damage management
主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会