通过详细分析当前快掘工作面的防尘现状及长压短抽通风除尘系统应用于快掘工作面存在的问题,在现场调研、现场实测、数值模拟相结合的基础上,得出了快掘工作面粉尘的运移分布规律.根据其规律及当前防尘存在的问题,创新提出了前压后抽除尘方法,并设计了系统图,为快掘工作面粉尘治理提供了新思路.

为了解决大采高综采工作面采煤机截煤时因采煤机机身阻挡向支架行人侧扩散的含尘气流污染人行区域的问题,通过Fluent数值模拟软件分析了大采高综采工作面粉尘运移分布规律,根据粉尘污染现状创新设计了采煤机机载除尘器.应用结果表明,该装置对采煤机侧向人行侧扩散的含尘气流有较好的净化效果,最大降尘效率达77.1％,对改善粉尘污染情况起到了较大作用,为大采高综采工作面粉尘防治提供现实依据.

针对大采高综采工作面支架间人行道粉尘污染严重的问题,以补连塔煤矿12513工作面为研究对象,通过现场调研,得出降柱移架的主要产尘点.基于封闭控尘原理,优选出U形结构作为封闭控尘装置的主体,并采用滑轨补偿移架位移的方式设计了一种新型的支架滑移式封闭控尘装置,并对其有效性和可靠性进行了现场试验.现场应用表明,该装置粉尘降尘效率达92％以上,显著改善了大采高工作面有人作业区域的环境卫生条件.

With the development of large-scale coal mining equipment, fully-mechanized mining faces with 8 m or higher mining height have been applied successfully. However, the increase in yield and mining space makes it difficult for traditional dust prevention techniques to handle dust pollution issues. In order to solve this problem, a method of dust removal by ventilation was creatively proposed for fully-mechanized mining faces. Also, exemplified by the 12513 fully-mechanized mining face of Bulianta Coal Mine, a numerical calculation model was established. By combining theory, numerical simulation and field test, an “onboard dust removal” technology was proposed and a dust collector mounted on the coal cutter was developed. Besides, with numerical simulation and industrial field experiment, it was validated that the proposed technology could reduce the dust particle mass concentration near the sidewalk by 77.2% with a comprehensive average dust suppression efficiency of 74.25%. It provides a practical basis for creating a green and safe production environment in coal mines.

高压雾化喷嘴的优选是涉及多因素、多指标的综合性问题.提出采用多指标正交实验的方法,以煤矿采煤面常用的3大类高压雾化喷嘴为例,采用极差分析、方差分析对喷嘴的实验结果进行分析与讨论,最终确定最优组合为c类型、喷嘴孔径为1.6 mm的7#高压雾化喷嘴,喷雾压力为8 MPa,并将7#喷嘴在高庄煤矿采煤工作面进行了应用.通过现场实测,采取优选喷嘴的综合降尘措施后,采煤工作面有人作业处喷雾降尘效率达到83.9％以上.

结合6202综放面运输平巷地质条件,建立了符合现场的计算模型,通过对模型的受力分析及工作面过渡架实际压力分析,确定了简易支架所需要提供的支撑力,从而确定了简易支架每个单体支柱需要提供的最小支撑力.该简易架不仅能够放出部分运输平巷的顶煤,同时能够加强平巷靠近采空区区域的顶板控制.

针对红石矿区新开拓矿体与围岩都极其破碎,自然塌落现象严重的情况,提出利用下向进路分层充填采矿法对破碎矿体进行开采.利用FLAC3D数值模拟软件,对充填体和围岩进行应力应变分析,建立模型分析不同分层在回采过程中围岩的位移及应力变化范围,进而确定胶结充填体的强度要求,保证安全高效作业,指导现场井下试验,满足开采需求,对类似矿山具有一定的指导意义.

This paper introduces authority application for management system of power supply network in coal mine based on JSP and Oracle, made the system needs analysis, designed and selected thesystem scheme, and the system database, completed the system code, debugging, testing etc.. The results show that after the system testing, the power supply management of coal to meet the new situation demands.