综采工作面粉尘运移规律及架间喷雾降尘参数优化研究

发布时间：2018-06-22 19:15

本文选题：综采工作面 + 粉尘运移规律　；参考：《西安科技大学》2017年硕士论文

【摘要】：煤炭工业化进程加快,井下机械化程度不断提高,综采工艺基本覆盖现代化大型矿井。由于开采强度加大,工作面作业空间的粉尘存聚量也逐渐加大,随之而来的是井下作业环境的进一步恶化,工人生理、心理健康受损。研究综采面风流分布、粉尘运动规律及降尘参数的优化对井下环境质量的改善有重要意义,并且面对逐年攀升的尘肺发病人数,这项研究工作对井下接尘人员的职业病预防及生理、心理健康也有着重要的现实意义。以榆林市杨伙盘煤矿20304综采面为研究对象,首先分析了粉尘微观视角上的受力情况及运动状态,通过实测采样对工作面风流分布规律、粉尘分散度、各主要产尘工序点位的粉尘浓度分布及区域空间内的浓度变化进行了分析。其次进行了数值模拟计算,结合实测结果得到了综采工作面风流分布及粉尘的弥散规律。再次,对开启综采工作面原有降尘措施后的粉尘浓度进行实测,得出各主要产尘点位的呼尘及全尘降尘率,移架处呼尘降尘率最高,可达81.5%,落煤处全尘降尘率最高,可达82.6%。最后,运用遗传算法对架间喷雾降尘参数进行了优化,对经优化后的粉尘浓度进行实测,得出各主要产尘点位粉尘浓度都有所降低,整体降尘率可达90%以上,同时为井下降尘工作提供了一种新方法。
[Abstract]:The process of coal industrialization is speeding up, the mechanization of underground coal mine is improving continuously, and the fully mechanized coal mining technology basically covers modern large-scale mines. Due to the increase of mining intensity, the dust accumulation in the working space of the working face is gradually increased, followed by the further deterioration of the underground working environment, and the injury to the physiological and mental health of the workers. It is important to study the air flow distribution, dust movement law and dust lowering parameter optimization of fully mechanized coal face for the improvement of underground environmental quality, and to face the increasing number of pneumoconiosis cases year by year. This work has important practical significance for occupational disease prevention, physiology and mental health of workers exposed to dust. Taking the 20304 fully mechanized face of Yangyangpan Coal Mine in Yulin City as the research object, this paper first analyzes the force and movement state of the dust from the microscopic perspective, and through the measured sampling, analyzes the distribution law of the wind flow and the dispersion of the dust in the working face. The distribution of dust concentration and the change of concentration in the space of each main dust-producing process were analyzed. Secondly, numerical simulation is carried out, and the distribution of air flow and the dispersion of dust in fully mechanized mining face are obtained by combining the measured results. Thirdly, the dust concentration of the original dust control measures in the open fully mechanized coal mining face is measured, and the dust absorption rate of the main dust producing points and the total dust fall rate are obtained. The dust absorption rate of the main dust producing points is the highest, which can reach 81.5, and that of the coal fall is the highest, up to 82.6 percent. Finally, the parameters of interframe spray dust control are optimized by genetic algorithm, and the dust concentration after optimization is measured. The results show that the dust concentration at the main dust producing points is reduced, and the overall dust fall rate can reach more than 90%. At the same time, it provides a new method for downhole dust control.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD714

【参考文献】