On the long wall of coal dust control
Robert and George
Introduction
Since the 1969 Federal Coal Mine Health and Safety act passed, the PBM has been actively exploring the coal dust inhalation. Until a few years ago, the main research project is to develop and improve the dust of the new technology, reduce respirable dust miners and the continuous mining method, and so on. Since the PBM, the Mine Safety and Health Administration (-MSHA), in the coal industry to reduce dust has made significant progress, have from 500 to 1969 mg / m decline now less than 2 mg / m 3. These things reflect the recent help-MSHA published volume. According to data showed that at least 95 mining and traditional departments had been in compliance with the Federal Coal Mine Health and Safety act.
While this is a remarkable achievement, but several types of mining is the main longwall mining method, very difficult to comply with the existing 2 mg / cubic meters of federal standards. Under normal circumstances, more than 50% over the long wall of standards, of which about two-thirds of the double-drum cutting coal. Thus, in the past few years, respirable coal dust of the key issues that has been long wall coal dust problem to a greater use of this method of mining. This trend is due to the need to increase productivity to meet the ever-increasing demand for coal. Unless the development and implementation of effective control of dust, otherwise, people will not aware of this potential and efficient method of mining coal dust problem. PBM successful research shows that the cost-effectiveness of the project is the development level of longwall operations to reduce coal dust. Moreover, a more accurate monitoring equipment to alleviate this problem is very effective. Set up monitoring equipment usually four to six feet face angle to maximize the drum to avoid interference. Concentration monitoring and no-screen display in the show from 1950 to 1960 at this stage can reduce operator exposure to coal dust China.

關于工作面煤塵控制的研究
羅伯特和喬治
介紹
自從1969年聯邦煤礦健康和安全行為通過，礦務局一直積極研究煤塵的吸入。直到數年前，主要研究計劃是發(fā)展和完善防塵的新技術，減少礦工吸入灰塵和連續(xù)開采方法等方面。由于礦務局、煤礦安全和健康管理局(MSHA)的努力，煤炭工業(yè)在降低塵埃方面取得了重大進展， 已經由1969年為500毫克/立方米下降現在不到2毫克/立方米。這些東西多少反映了近年來MSHA發(fā)表幫助的數量。根據數據表明，目前至少95個礦業(yè)和傳統(tǒng)各部門一直在遵守聯邦煤礦健康和安全行為。
雖然這是一個了不起的成就，但是幾種采礦類型主要是用長壁開采方法，很難繼續(xù)遵守現有的2毫克/立方米的聯邦標準。一般情況下，超過50%的長壁超過了標準，其中約三分之二的部分采用雙滾筒割煤。 因此，在過去幾年中，吸入煤塵的重點問題已經由長壁煤塵問題轉向更多地利用這一方法開采。 這種趨勢是因為需要提高生產力，滿足不斷增加的煤炭需求。除非制定和實施有效的控制粉塵，否則人們將意識不到這一有潛力的和高效采煤方法的煤塵問題。礦務局的研究成功表明成本效益工程確實是發(fā)展水平長壁減少煤塵作業(yè)。 此外，更準確的監(jiān)測設備緩解這個問題是非常有效的。監(jiān)測設備通常設置4至6英尺面對角從而最大限度地避免滾筒的干擾。濃度監(jiān)測與無屏顯示表明在1950年至1960年這一階段可以減少操作員暴露在煤塵中。